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List:       ms-ospf
Subject:    Re: [Lsr]  =?utf-8?q?=5BNeed_AD=E2=80=99s_Judgement_and_Explanation?=
From:       Aijun Wang <wangaijun () tsinghua ! org ! cn>
Date:       2022-05-18 0:14:32
Message-ID: 32BD5E69-02E7-4D5B-8416-81B6D6C7C4C1 () tsinghua ! org ! cn
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Hi, Acee:
I noticed that the base document is in "AD Evaluation" state and if there is no \
objection for the simpler solution for "IP Flex-Algorithm", all the need is to add \
some descriptions under the section " Flex-Algorithm and Forwarding \
Plane"(https://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo-19#section-14)

If the above addition is also too late, I can write one draft to describe the \
necessary contents and the backwards solutions, but it will update the base document \
RFC(the above section 14 and may include also the section \
https://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo-19#section-13.1 ), and \
then we will have two solutions for the IP Flex Algorithm scenarios? 

Want to hear the opinions from John, our AD, both documents are in your hands now. 

I prefer to rewrite the current IP Flex-Algorithm or update the base document \
directly. Peter, Shraddha are the authors of both documents, it is easier for them to \
accomplish this work.


Aijun Wang
China Telecom

> On May 17, 2022, at 23:17, Acee Lindem (acee) <acee@cisco.com> wrote:
> 
> Hi Aijun,
> 
> Why you don't you put your proposals in a draft? Independent of the technical \
> soundness, the WG last call is not the time to redefine requirements and redesign \
> functions. There are always multiple ways to solve any problem and there is nothing \
> fundamentally broken with the current IP Flex Algorithm or the requirements we've \
> been working toward for close to two years now. In fact, there are implementations. \
>  Just because you believe you have a purpportedly simpler encoding and a different \
> view of backward compatibility doesn't mean the WG is obligated to change \
> direction. 
> Thanks,
> Acee
> 
> From: Lsr <lsr-bounces@ietf.org> on behalf of Aijun Wang \
>                 <wangaijun@tsinghua.org.cn>
> Date: Tuesday, May 17, 2022 at 10:23 AM
> To: Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org>
> Cc: Acee Lindem <acee@cisco.com>, John Scudder <jgs@juniper.net>, Ketan Talaulikar \
> <ketant.ietf@gmail.com>, "lsr@ietf.org" <lsr@ietf.org>, \
>                 "draft-ietf-lsr-ip-flexalgo@ietf.org" \
>                 <draft-ietf-lsr-ip-flexalgo@ietf.org>
> Subject: Re: [Lsr] [Need AD's Judgement and Explanation] Re: Working Group Last \
> Call for draft-ietf-lsr-ip-flexalgo-04 - "IGP Flexible Algorithms (Flex-Algorithm) \
> In IP Networks" 
> Hi, Peter:
> Here is the contradictory:
> The prefixes that associated with SID can exist in multiple Algo and also the \
> algorithm 0. Why the prefixes that don't associate with the SID can't exist in \
> specific Algo and also the algorithm 0? I have provided the solutions for the loop \
> avoidance. If this is only your worry, you can responses the threads that I \
> discussed with Acee. 
> 
> 
> Aijun Wang
> China Telecom
> 
> 
> On May 17, 2022, at 21:42, Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org> wrote:
> 
> Aijun,
> 
> On 17/05/2022 15:04, Aijun Wang wrote:
> 
> Hi, Peter:
> Based on the statements in \
> https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6 \
> <https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6> as \
> the followings: "To be able to associate the prefix with the Flex-Algorithm, the
> existing prefix reachability advertisements can not be used, because
> they advertise the prefix reachability in default algorithm 0.
> Instead, a new IP Flex-Algorithm reachability advertisements are
> defined in IS-IS and OSPF."
> Then why the FAPM sub-TLV can be included in these prefixes reachability \
> advertisements? 
> FAPM is only used for SR MPLS, where the prefix can exist in multiple algos and \
> forwarding is realized via algo specific label(s). In SR MPLS the prefix is always \
> reachable in algo 0. 
> In IP flex-algo, the prefix is only associated with a single algo.
> 
> thanks,
> Peter
> 
> 
> Aijun Wang
> China Telecom
> On May 17, 2022, at 19:24, Peter Psenak <ppsenak@cisco.com> wrote:
> 
> Hi Aijun,
> 
> please see inline:
> 
> 
> On 17/05/2022 04:10, Aijun Wang wrote:
> Hi, Peter and Acee:
> Then the key issues are the node's capabilities negotiation within one area. Right?
> To deploy the flex-Algo and ensure the forwarding paths are available,  should the \
> nodes within one area be all upgraded in advance? 
> 
> absolutely not. That has never been a requirement for flex-algo. It can be deployed \
> incrementally. 
> If so, why we should still worry about the legacy router? If not, how the operators \
> confirm/assures there will be available paths when apply one flex-algorithm? I \
> think it will be a disaster when only some of routers within the area to support \
> some of flex-algorithms. 
> no, it will work just fine. Same as if not all routers participate in the \
> particular flex-alago. That is actually one of the deployment scenarios that I've \
> seen being deployed - using flex-algo to create multiple specific planes with a \
> subset of routers only. 
> 
> Not every node should participate each flex-algorithm, but every node should \
> support the deployed flex-algorithm. 
> no, that is absolutely not a requirement.
> 
> 
> If the above conditions are not met, such algorithm specified prefixes shouldn't be \
> advertised in any node. Based on the above rule, no possible loop will occur. The \
> standard will be also simplified. Or else, why we have the node capabilities \
> advertisements? 
> there is no negotiation of the flex-algo support. Only the participation in \
> flex-algo is advertised. 
> thanks,
> Peter
> 
> Aijun Wang
> China Telecom
> On May 17, 2022, at 01:24, Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org> wrote:
> 
> Aijun,
> 
> please read the responses from Les and myself on this matter. We can not use legacy \
> advertisement of prefix for IP algp prefixes, because legacy routers would treat \
> this as valid advertisement of prefix in algo-0. If that happens routers with IP \
> algpo support would calculate the path on a different topology than the routers \
> that do not support IP algo. That at the end would result in permanent loops. 
> I don't know what else to add. Seems obvious to me.
> 
> thanks,
> Peter
> 
> 
> 
> 
> On 16/05/2022 17:35, Aijun Wang wrote:
> Hi, Acee:
> I am curious that you are so hurry to forward this document.
> The updated document just describes the followings: \
> (https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6 \
> <https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6>) \
> "To be able to associate the prefix with the Flex-Algorithm, the existing prefix \
> reachability advertisements can not be used, because they advertise the prefix \
> reachability in default algorithm 0. Instead, a new IP Flex-Algorithm reachability \
> advertisements are defined in IS-IS and OSPF."
> If the above statement is valid, then why the FAPM defined in the base document can \
> be the sub-TLV of existing prefix advertisements? Please also refer to the IANA \
> allocation table https://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-codepoints-advertising-prefix-reachability \
> <https://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-codepoints-advertising-prefix-reachability>
>  And, I see no any clue of different flex-Algo will influence each other:
> If the router doesn't support FAPM sub-TLV(doesn't not support flex-Algo) or the \
> FAPM sub-TLV doesn't present in the prefix advertisements , the prefixes will be \
> calculated in algorithm 0. If the router support FAPM sub-TLV(support flex-Algo) \
> and FAPM is present, the associated prefixes will be calculated in the appointed \
> Flex-Algorithm. What's the difficulty?
> I have also noticed your statement in the document write up, but you and the \
> authors' responses to the concerns are unreasonable. Should the AD make the final \
> judgment and give one reasonable explanation? I respect the works of the authors \
> and all the reviewers' and shepherd's efforts, but think this is not the right \
> direction to accomplish the aim. Aijun Wang
> China Telecom
> On May 16, 2022, at 19:50, Acee Lindem (acee) <acee=40cisco.com@dmarc.ietf.org> \
> wrote: 
> Hi Aijun,
> 
> We need to support mixed deployments of routers that do and do not support flex \
> algorithm and in these deployments the default algorithm, i.e., algorithm 0, \
> computation must not be impacted. This is clearly stated in the draft. Your \
> suggestion is noted but what you are suggesting doesn't satisfy these requirements. \
>  Thanks,
> Acee
> 
> *From: *Aijun Wang <wangaijun@tsinghua.org.cn>
> *Date: *Saturday, May 14, 2022 at 11:19 PM
> *To: *Acee Lindem <acee@cisco.com>
> *Cc: *"Peter Psenak (ppsenak)" <ppsenak@cisco.com>, Ketan Talaulikar \
> <ketant.ietf@gmail.com>, "lsr@ietf.org" <lsr@ietf.org>, \
>                 "draft-ietf-lsr-ip-flexalgo@ietf.org" \
>                 <draft-ietf-lsr-ip-flexalgo@ietf.org>
> *Subject: *Re: [Lsr] Working Group Last Call for draft-ietf-lsr-ip-flexalgo-04 - \
> "IGP Flexible Algorithms (Flex-Algorithm) In IP Networks" 
> Hi, Acee and Peter:
> I don't still think this document is necessary, unless you can answer the following \
> questions clearly: 1) Section 5 about the "Advertising IP Flex-Algorithm \
> Reachability" are not necessary, since every FAD has need advertised in the FAD \
> advertisements. There is no such participations advertisements for SR and SRv6 \
> dataplane. Only the node participations should be advertised, as that described in \
> the base document. 2) Section 6 about the "Advertisements IP Flex-Algorithm \
> Reachability" is also redundant. The FAPM defined in the base document can transfer \
> the same information, what's the reason to define the new one? 3) Section 7 can be \
> added to the section 14 "Flex-Algorithm and Forwarding Plane" of the base document. \
> This section just describes how to apply the Flex-Algorithm to different data \
> plane, why not use the FAPM directly to achieve such goal? No new TLV/sub-TLVs are \
> needed. 4) There is no more additional information for section 8-10, compared to \
> the base document. 5) For the IANA part of IS—IS, redundant information will be \
> exist in two code points. The inconsistency will be emerged later when the \
> additional sub-TLV is added under this code point. 
> In conclusion, reusing the FAPM is the right direction to solve the mentioned use \
> case in the updated draft. 
> Aijun Wang
> China Telecom
> 
> On May 14, 2022, at 04:29, Acee Lindem (acee) <acee=40cisco.com@dmarc.ietf.org> \
> wrote: 
> Hi Peter,
> 
> Thanks for addressing the WG last comments relating to terminology and IGP \
> flex-algorithm data-plane granularity. I also have some editorial comments \
> attached. These include: 
> 1. Remove "new" from the text since these specifications will not be new when they \
> are published. 2. Fix the reference to the OSPFv3 Router Information Opaque LSA. As \
> you know, there are no opaque LSAs in OSPFv3 since OSPFv3 natively supports LSA \
> compatibility. 3. Replace "ISIS" with "IS-IS".
> 4. Use American English spellings consistent with RFC style.
> 
> One comments, for situations where we don't install any route in the data-plane, \
> should we recommend logging an error? For example, in RFC 7684, we say: 
> This situation SHOULD be logged as an error.
> 
> I was tempted to hyphenate "Flex-algorithm specific" and "algorithm specific" but \
> didn't since they aren't in the base Flex-Algo specification. 
> Thanks,
> Acee
> 
> 
> 
> 
> 
> On 5/13/22, 9:59 AM, "Lsr on behalf of Peter Psenak" <lsr-bounces@ietf.org on \
> behalf of ppsenak=40cisco.com@dmarc.ietf.org> wrote: 
> Hi Ketan,
> 
> sure, thanks for catching those, I'll fix them in next revision.
> 
> thanks,
> Peter
> 
> 
> On 13/05/2022 15:32, Ketan Talaulikar wrote:
> Hi Peter,
> 
> Thanks for your updates to the draft and your responses below.
> 
> I would like to point out a few remaining points to be fixed/addressed.
> 
> a) There is a discrepancy regarding the size of the Metric field for the
> OSPFv2 IP Algo Reachability sub-TLV between the figure and the text
> description. The text needs to be fixed to reflect 4 octets size.
> 
> b) For the OSPFv3 IP Algo Prefix Reachability sub-TLV the Type should be
> 2 octets and the discrepancy in the sub-TLV name in the Figure needs to
> be corrected. Length should now become 8.
> 
> c) The references to the sections of draft-lsr-flex-algo in this
> document need corrections in Sec 7 ? In general, I think the references
> to the base draft sections 11, 12, and 13 (except that M-flag is always
> used) would be helpful.
> 
> Thanks,
> Ketan
> 
> On Wed, May 11, 2022 at 3:20 PM Peter Psenak <ppsenak@cisco.com
> <mailto:ppsenak@cisco.com <mailto:ppsenak@cisco.com>>> wrote:
> 
> Hi Ketan,
> 
> 
> please see inline (##PP):
> 
> On 11/04/2022 08:25, Ketan Talaulikar wrote:
> Hello All,
> 
> Following are some comments on this draft:
> 
> 1) Is this draft about opening the use of all IGP Algorithms for IP
> (Algo) Routing or intended to be specific to Flexible Algorithms
> (i.e.
> algo 128-255) alone. I think it is important to specify the scope
> unambiguously. Perhaps it makes sense to restrict the usage in this
> particular document to FlexAlgorithms alone. If not, the draft
> probably
> needs an update and we need to also cover algo 1 (Strict SPF)
> applicability and update the text to refer more generically to
> algo-specific IP routing.
> 
> ##PP
> Done
> 
> 
> 2) The relationship between the algo usage for IP FlexAlgo and other
> data planes (e.g. FlexAlgo with SR) is not very clear. There arise
> complications when the algo usage for IP FlexAlgo overlap with other
> (say SR) data planes since the FAD is shared but the node
> participation
> is not shared. While Sec 9 suggests that we can work through these
> complications, I question the need for such complexity. The FlexAlgo
> space is large enough to allow it to be shared between various data
> planes without overlap. My suggestion would be to neither carve out
> parallel algo spaces within IGPs for various types of FlexAlgo data
> planes nor allow the same algo to be used by both IP and SR data
> planes.
> So that we have a single topology computation in the IGP for a given
> algo based on its FAD and data plane participation and then when it
> comes to prefix calculation, the results could involve
> programming of
> entries in respective forwarding planes based on the signaling of
> the
> respective prefix reachabilities. The coverage of these aspects in a
> dedicated section upfront will help.
> 
> ##PP
> this has been discussed previously in this thread.
> 
> 
> 
> 3) This draft makes assertions that IGP FlexAlgo cannot be deployed
> without SR. This is not true since the base IGP FlexAlgo spec
> explicitly
> opens it up for usage outside of the SR forwarding plane. We already
> have BIER and MLDP forwarding planes as users of the IGP
> FlexAlgo. My
> suggestion is to remove such assertions from the document. It is
> sufficient to just say that the document enables the use of IGP
> FlexAlgo
> for IP prefixes with native IP forwarding.
> 
> ##PP
> Done
> 
> 
> 4) The draft is mixing up "address" and "prefix" in some places. IGP
> path computation is for prefixes and not addresses. There are a few
> instances where "address" should be replaced by "prefix".
> References to
> RFC791 and RFC8200 seem unnecessary.
> 
> 
> ##PP
> Done
> 
> 
> 5) The draft does not cover the actual deployment use-case or
> applicability of IP FlexAlgo. The text in Sec 3 is not clear and
> insufficient. What is the point/use of sending traffic to a
> loopback of
> the egress router? Perhaps it makes sense in a deployment where
> IP-in-IP
> encapsulation is used for delivering an overlay service? If so,
> would be
> better to clarify this. The other deployment scenario is where
> "external" or "host/leaf prefixes" are associated with a FlexAlgo to
> provide them a different/appropriate routing path through the
> network.
> Yet another is the use of IP FlexAlgo along with LDP. Sec 9 does not
> address the topic well enough. I would suggest expanding and
> clarifying
> this and perhaps other such deployment use cases (or
> applicability) in
> the document in one of the earlier sections to provide a better
> context
> to the reader.
> 
> 
> ##PP
> Done
> 
> 
> 
> 6) It would be better to move the common (i.e. not protocol
> specific)
> text from 5.1 and 5.2 under 5. This might also apply to some
> extent to
> the contents of sec 6.
> 
> 
> ##PP
> Done. For section 6, I would prefer to keep it in the protocol specific
> sections.
> 
> 
> 7) Most of the text with MUSTs in sec 5 doesn't really make sense in
> repeating - this is covered in the base FlexAlgo spec already.
> The only
> key/important MUST is the one related to using separate algo for IP
> FlexAlgo over SR data planes. See my previous comment (2) above.
> 
> ##PP
> I prefer to keep the MUSTs there
> 
> 
> 8) Sec 5.1, the SHOULD needs to be MUST in the text below.
> 
> A router receiving multiple IP Algorithm
> sub-TLVs from the same originator SHOULD select the first
> advertisement in the lowest-numbered LSP and subsequent
> instances of
> the IP Algorithm Sub-TLV MUST be ignored.
> 
> ##PP
> Done.
> 
> 
> 
> 9) Sec 5.1, I would suggest changing the following text as
> indicated.
> Also, perhaps add that the algo 0 MUST NOT be advertised and a
> receiver
> MUST ignore if it receives algo 0.
> OLD
> 
> The IP Algorithm Sub-TLV could be used to advertise
> support for non-zero standard algorithms, but that is outside the
> scope of this document.
> 
> NEW
> 
> The use of IP Algorithm Sub-TLV to advertise support for
> algorithms
> 
> outside the flex-algorithm range is outside the
> scope of this document.
> 
> ##PP
> Done
> 
> 
> 
> 10) Sec 5.1, the SHOULD needs to be MUST in the text below
> 
> The IP Algorithm TLV is optional.  It SHOULD only be
> advertised once
> in the Router Information Opaque LSA.
> 
> ##PP
> Done
> 
> 
> 
> 11) Sec 6. The following text is better moved into the respective
> protocol sub-sections. OSPFv3 is not covered anyway by it.
> 
> Two new top-level TLVs are defined in ISIS [ISO10589
> <https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo#ref-ISO10589
> <https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo#ref-ISO10589 \
> <https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo#ref-ISO10589>>>] \
> to advertise prefix reachability associated with a Flex-Algorithm.
> 
> *  The IPv4 Algorithm Prefix Reachability TLV
> 
> *  The IPv6 Algorithm Prefix Reachability TLV
> 
> New top-level TLV of OSPFv2 Extended Prefix Opaque LSA
> [RFC7684  <https://datatracker.ietf.org/doc/html/rfc7684
> <https://datatracker.ietf.org/doc/html/rfc7684 \
> <https://datatracker.ietf.org/doc/html/rfc7684>>>] is defined to advertise prefix \
> reachability associated with a Flex- Algorithm in OSPFv2.
> 
> ##PP
> Done
> 
> 
> 12) Sec 6.1 & 6.2. There is no discussion regd the use of the Prefix
> Attribute Flags sub-TLV with the new top-level TLVs.
> 
> I think their usage MUST (or at least SHOULD) be included as it
> helps
> determine the route type and prefix attributes that
> 
> have proven to be quite useful for various use cases and deployments.
> 
> ##PP
> 
> Why? We have a text that says:
> 
> "This new TLV shares the sub-TLV space defined for TLVs 135, 235, 236
> and 237."
> 
> Why do we need to describe the usage of the specific sub-TLV?
> 
> 
> 
> 13) Sec 6.2 what happens when the same prefix is advertised as SRv6
> Locator as well as IPv6 Algo Prefix (same or conflicting algos).
> Perhaps
> both must be ignored?
> 
> The same applies for OSPFv3 as well.
> 
> ##PP
> Done
> 
> 
> 
> 14) Sec 6.3, OSPFv2 MT-ID reference should be RFC4915. Perhaps
> the range
> of MT should be mentioned since it is a 8 bit field here.
> 
> ##PP
> Done
> 
> 
> 
> 15) Sec 6.4, the metric field in the sub-TLV has to be 32-bit. While
> 24-bit is ok when the FAD uses IGP metric, it will not suffice
> for other
> IGP metric types.
> 
> ##PP
> Done
> 
> 
> 
> 16) Sec 6.3 & 6.4, the conflict checking with base algo 0 prefix
> reachability cannot be limited only to the OSPFv2/3 Extended LSAs
> but
> should also cover the base fixed form >
> OSPFv2/v3 LSAs. We could use a more generic term like "normal prefix
> reachability" advertisements perhaps to cover the different LSAs?
> 
> ##PP
> Done
> 
> 
> 
> 
> 17) Sec 7 and 8, suggest to not use the term "application" to avoid
> confusion with ASLA. My understanding is that there is a single
> FlexAlgo
> application when it comes to ASLA.
> 
> Perhaps the intention here is "data plane" ?
> 
> ##PP
> Done
> 
> 
> 
> 18) The relationship between the BIER IPA and this draft needs some
> clarifications - should the BIER WG be notified if they want to
> update
> draft-ietf-bier-bar-ipa?
> 
> This (in some way) goes back to my comment (2) above.
> 
> ##PP
> I don't see the relationship to BIER IPA here.
> 
> 
> 
> 19) Sec 8, what prevents the use of IP FlexAlgo paths programmed
> by LDP
> as well. Or if the intention is to use them strictly for IP
> forwarding only
> 
> then this needs to be clarified.
> 
> ##PP
> nothing prevents someone to advertise LDP label for the IP algo-prefix
> and use it with the labeled forwarding. I don't see a problem. But this
> specification does not specify any of it.
> 
> 
> 
> 20) The following text in Sec 9 is about using the same FlexAlgo
> (with a
> common definition) for multiple data-planes at the same time. The
> key is
> that we only are able to use
> 
> prefix in one algo/data-plane? I am wondering if we can improve this
> text to bring this out in a better way. Or altogether remove this
> if we
> agree to not allow sharing of algo
> 
> between different data planes to keep things simple.
> 
> Multiple application can use the same Flex-Algorithm value at the
> 
> same time and and as such share the FAD for it.  For example
> SR-MPLS
> and IP can both use such common Flex-Algorithm.  Traffic for
> SR-MPLS
> will be forwarded based on Flex-algorithm specific SR SIDs.
> Traffic
> for IP Flex-Algorithm will be forwarded based on Flex-Algorithm
> specific prefix reachability announcements.
> 
> ##PP
> Done.
> 
> thanks,
> Peter
> 
> 
> Thanks,
> 
> Ketan
> 
> 
> 
> On Fri, Apr 8, 2022 at 12:38 AM Acee Lindem (acee)
> <acee=40cisco.com@dmarc.ietf.org
> <mailto:40cisco.com@dmarc.ietf.org <mailto:40cisco.com@dmarc.ietf.org>>
> <mailto:40cisco.com@dmarc.ietf.org
> <mailto:40cisco.com@dmarc.ietf.org <mailto:40cisco.com@dmarc.ietf.org>>>> wrote:
> 
> This begins a WG last call for
> draft-ietf-lsr-ip-flexalgo-04.  The
> draft had a lot of support and discussion initially and has been
> stable for some time. Please review and send your comments,
> support,
> or objection to this list before 12 AM UTC on April 22^nd ,
> 2022.____
> 
> __ __
> 
> Thanks,
> Acee____
> 
> _______________________________________________
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[Attachment #5 (text/html)]

<html><head><meta http-equiv="content-type" content="text/html; \
charset=utf-8"></head><body dir="auto"><div dir="ltr"><meta http-equiv="content-type" \
content="text/html; charset=utf-8">Hi, Acee:<div>I noticed that the base document is \
in "AD Evaluation" state and if there is no objection for the simpler solution for \
"IP Flex-Algorithm", all the need is to add some descriptions under the section \
"<span style="font-size: 1em; font-weight: bold; white-space: pre; \
-webkit-text-size-adjust: auto;"> Flex-Algorithm and Forwarding Plane"</span>(<a \
href="https://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo-19#section-14">ht \
tps://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo-19#section-14</a>)</div><div><br></div><div>If \
the above addition is also too late, I can write one draft to describe the necessary \
contents and the backwards solutions, but it will update the base document RFC(the \
above section 14 and may include also the section&nbsp;<a \
href="https://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo-19#section-13.1"> \
https://datatracker.ietf.org/doc/html/draft-ietf-lsr-flex-algo-19#section-13.1&nbsp;</a>), \
and then we will have two solutions for&nbsp;the IP Flex Algorithm \
scenarios?&nbsp;</div><div><br></div><div>Want to hear the opinions from John, our \
AD, both documents are in your hands now.&nbsp;</div><div><br></div><div>I prefer to \
rewrite the current IP Flex-Algorithm or update the base document directly. \
Peter,&nbsp;<span style="font-size: 1em; -webkit-text-size-adjust: auto;">Shraddha \
are the authors of both documents, it is easier for them to accomplish this \
work.</span></div><div><br></div><div><br><div dir="ltr">Aijun Wang<div>China \
Telecom</div></div><div dir="ltr"><br><blockquote type="cite">On May 17, 2022, at \
23:17, Acee Lindem (acee) &lt;acee@cisco.com&gt; \
wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">

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<div class="WordSection1">
<p class="MsoNormal">Hi Aijun, <o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal">Why you don't you put your proposals in a draft? Independent of \
the technical soundness, the WG last call is not the time to redefine requirements \
and redesign functions. There are always multiple ways to solve any problem and there \
is  nothing fundamentally broken with the current IP Flex Algorithm or the \
requirements we've been working toward for close to two years now. In fact, there are \
implementations. <o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal">Just because you believe you have a purpportedly simpler \
encoding and a different view of backward compatibility doesn't mean the WG is \
obligated to change direction.<o:p></o:p></p> <p \
class="MsoNormal"><o:p>&nbsp;</o:p></p> <p class="MsoNormal">Thanks,<br>
Acee<o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-left:.5in"><b><span \
style="font-size:12.0pt;color:black">From: </span></b><span \
style="font-size:12.0pt;color:black">Lsr &lt;lsr-bounces@ietf.org&gt; on behalf of \
Aijun Wang &lt;wangaijun@tsinghua.org.cn&gt;<br> <b>Date: </b>Tuesday, May 17, 2022 \
at 10:23 AM<br> <b>To: </b>Peter Psenak \
&lt;ppsenak=40cisco.com@dmarc.ietf.org&gt;<br> <b>Cc: </b>Acee Lindem \
&lt;acee@cisco.com&gt;, John Scudder &lt;jgs@juniper.net&gt;, Ketan Talaulikar \
&lt;ketant.ietf@gmail.com&gt;, "lsr@ietf.org" &lt;lsr@ietf.org&gt;, \
"draft-ietf-lsr-ip-flexalgo@ietf.org" &lt;draft-ietf-lsr-ip-flexalgo@ietf.org&gt;<br> \
<b>Subject: </b>Re: [Lsr] [Need AD's Judgement and Explanation] Re: Working Group \
Last Call for draft-ietf-lsr-ip-flexalgo-04 - "IGP Flexible Algorithms \
(Flex-Algorithm) In IP Networks"<o:p></o:p></span></p> </div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</div>
<p class="MsoNormal" style="margin-left:.5in">Hi, Peter:<o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in">Here is the \
contradictory:<o:p></o:p></p> </div>
<div>
<p class="MsoNormal" style="margin-left:.5in">The prefixes that associated with SID \
can exist in multiple Algo and also the algorithm 0.<o:p></o:p></p> </div>
<div>
<p class="MsoNormal" style="margin-left:.5in">Why the prefixes that don't associate \
with the SID can't exist in specific Algo and also the algorithm 0?<o:p></o:p></p> \
</div> <div>
<p class="MsoNormal" style="margin-left:.5in">I have provided the solutions for the \
loop avoidance. If this is only your worry, you can responses the threads that I \
discussed with Acee.<br> <br>
<o:p></o:p></p>
<h1 style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.5in;mso-line-height-alt:26.25pt">
 <span style="font-size:26.5pt"><o:p>&nbsp;</o:p></span></h1>
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in">Aijun Wang<o:p></o:p></p>
<div>
<p class="MsoNormal" style="margin-left:.5in">China Telecom<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal" style="margin-left:.5in"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:12.0pt;margin-left:.5in">
 On May 17, 2022, at 21:42, Peter Psenak &lt;ppsenak=40cisco.com@dmarc.ietf.org&gt; \
wrote:<o:p></o:p></p> </blockquote>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal" style="margin-left:.5in">Aijun,<br>
<br>
On 17/05/2022 15:04, Aijun Wang wrote:<br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Hi, Peter:<o:p></o:p></p>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Based on the statements in \
https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6 \
&lt;https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6&gt;&nbsp;as \
the followings:<o:p></o:p></p> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">"To be able to associate the prefix \
with the Flex-Algorithm, the<o:p></o:p></p> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;existing prefix \
reachability advertisements can not be used, because<o:p></o:p></p> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;they advertise the \
prefix reachability in default algorithm 0.<o:p></o:p></p> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Instead, a new IP \
Flex-Algorithm reachability advertisements are<o:p></o:p></p> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;defined in IS-IS and \
OSPF."<o:p></o:p></p> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Then why the FAPM sub-TLV can be \
included in these prefixes reachability advertisements?<o:p></o:p></p> </blockquote>
<p class="MsoNormal" style="margin-left:.5in"><br>
FAPM is only used for SR MPLS, where the prefix can exist in multiple algos and \
forwarding is realized via algo specific label(s). In SR MPLS the prefix is always \
reachable in algo 0.<br> <br>
In IP flex-algo, the prefix is only associated with a single algo.<br>
<br>
thanks,<br>
Peter<br>
<br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Aijun Wang<o:p></o:p></p>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">China Telecom<o:p></o:p></p>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">On May 17, 2022, at 19:24, Peter Psenak \
&lt;ppsenak@cisco.com&gt; wrote:<o:p></o:p></p> </blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Hi Aijun,<o:p></o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">please see inline:<o:p></o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">On 17/05/2022 04:10, Aijun Wang \
wrote:<o:p></o:p></p> </blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Hi, Peter and Acee:<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Then the key issues are the node's \
capabilities negotiation within one area. Right?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">To deploy the flex-Algo and ensure the \
forwarding paths are available, &nbsp;should the nodes within one area be all \
upgraded in advance?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">absolutely not. That has never been a \
requirement for flex-algo. It can be deployed incrementally.<o:p></o:p></p> \
</blockquote> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;If so, why we should still worry \
about the legacy router? If not, how the operators confirm/assures there will be \
available paths when apply one flex-algorithm? I think it will be a disaster when \
only some of routers  within the area to support some of \
flex-algorithms.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">no, it will work just fine. Same as if \
not all routers participate in the particular flex-alago. That is actually one of the \
deployment scenarios that I've seen being deployed - using flex-algo to create \
multiple  specific planes with a subset of routers only.<o:p></o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Not every node should participate each \
flex-algorithm, but every node should support the deployed \
flex-algorithm.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">no, that is absolutely not a \
requirement.<o:p></o:p></p> </blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">If the above conditions are not met, \
such algorithm specified prefixes shouldn't be advertised in any node.<o:p></o:p></p> \
</blockquote> </blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Based on the above rule, no possible \
loop will occur. The standard will be also simplified.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Or else, why we have the node \
capabilities advertisements?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">there is no negotiation of the \
flex-algo support. Only the participation in flex-algo is advertised.<o:p></o:p></p> \
</blockquote> </blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">thanks,<o:p></o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Peter<o:p></o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Aijun Wang<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">China Telecom<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">On May 17, 2022, at 01:24, Peter Psenak \
&lt;ppsenak=40cisco.com@dmarc.ietf.org&gt; wrote:<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Aijun,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">please read the responses from Les and \
myself on this matter. We can not use legacy advertisement of prefix for IP algp \
prefixes, because legacy routers would treat this as valid advertisement of prefix in \
algo-0.  If that happens routers with IP algpo support would calculate the path on a \
different topology than the routers that do not support IP algo. That at the end \
would result in permanent loops.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I don't know what else to add. Seems \
obvious to me.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">thanks,<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Peter<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">On 16/05/2022 17:35, Aijun Wang \
wrote:<o:p></o:p></p> </blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in">Hi, Acee:<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">I am curious that you are so hurry to \
forward this document.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">The updated document just describes the \
followings: (https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6 \
&lt;https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo-06#section-6&gt;)<o:p></o:p></p>
 </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">"To be able to associate the prefix \
with the Flex-Algorithm, the<o:p></o:p></p> </blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;existing prefix \
reachability advertisements can not be used, because<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;they advertise the \
prefix reachability in default algorithm 0.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Instead, a new IP \
Flex-Algorithm reachability advertisements are<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;defined in IS-IS and \
OSPF."<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">If the above statement is valid, then \
why the FAPM defined in the base document can be the sub-TLV of existing prefix \
advertisements?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Please also refer to the IANA \
allocation table https://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-codepoints-advertising-prefix-reachability \
&nbsp;&lt;https://www.iana.org/assignments/isis-tlv-codepoints/isis-tlv-codepoints.xhtml#isis-tlv-codepoints-advertising-prefix-reachability&gt;<o:p></o:p></p>
 </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">And, I see no any clue of different \
flex-Algo will influence each other:<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in">If the router doesn't support FAPM \
sub-TLV(doesn't not support flex-Algo) or the FAPM sub-TLV doesn't present in the \
prefix advertisements , the prefixes will be calculated in algorithm 0. If the router \
support  FAPM sub-TLV(support flex-Algo) and FAPM is present, the associated prefixes \
will be calculated in the appointed Flex-Algorithm.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in">What's the difficulty?<o:p></o:p></p>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">I have also noticed your statement in \
the document write up, but you and the authors' responses to the concerns are \
unreasonable.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Should the AD make the final judgment \
and give one reasonable explanation?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in">I respect the works of the authors and \
all the reviewers' and shepherd's efforts, but think this is not the right direction \
to accomplish the aim.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Aijun Wang<o:p></o:p></p>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">China Telecom<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">On May 16, 2022, at 19:50, Acee Lindem \
(acee) &lt;acee=40cisco.com@dmarc.ietf.org&gt; wrote:<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Hi Aijun,<o:p></o:p></p>
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</blockquote>
</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">We need to support mixed deployments of \
routers that do and do not support flex algorithm and in these deployments the \
default algorithm, i.e., algorithm 0, computation must not be impacted. This is \
clearly stated  in the draft. Your suggestion is noted but what you are suggesting \
doesn't satisfy these requirements.<o:p></o:p></p> </blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Thanks,<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Acee<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">*From: *Aijun Wang \
&lt;wangaijun@tsinghua.org.cn&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">*Date: *Saturday, May 14, 2022 at 11:19 \
PM<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">*To: *Acee Lindem \
&lt;acee@cisco.com&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">*Cc: *"Peter Psenak (ppsenak)" \
&lt;ppsenak@cisco.com&gt;, Ketan Talaulikar &lt;ketant.ietf@gmail.com&gt;, \
"lsr@ietf.org" &lt;lsr@ietf.org&gt;, "draft-ietf-lsr-ip-flexalgo@ietf.org" \
&lt;draft-ietf-lsr-ip-flexalgo@ietf.org&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">*Subject: *Re: [Lsr] Working Group Last \
Call for draft-ietf-lsr-ip-flexalgo-04 - "IGP Flexible Algorithms (Flex-Algorithm) In \
IP Networks"<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Hi, Acee and Peter:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I don't still think this document is \
necessary, unless you can answer the following questions clearly:<o:p></o:p></p> \
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<p class="MsoNormal" style="margin-left:.5in">1) Section 5 about the "Advertising IP \
Flex-Algorithm Reachability" are not necessary, since every FAD has need advertised \
in the FAD advertisements. There is no such participations advertisements for SR and \
SRv6  dataplane.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Only the node participations should be \
advertised, as that described in the base document.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">2) Section 6 about the "Advertisements \
IP Flex-Algorithm Reachability" is also redundant. The FAPM defined in the base \
document can transfer the same information, what's the reason to define the new \
one?<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">3) Section 7 can be added to the \
section 14 "Flex-Algorithm and Forwarding Plane" of the base document. This section \
just describes how to apply the Flex-Algorithm to different data plane, why not use \
the FAPM directly  to achieve such goal? No new TLV/sub-TLVs are \
needed.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">4) There is no more additional \
information for section 8-10, compared to the base document.<o:p></o:p></p> \
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<p class="MsoNormal" style="margin-left:.5in">5) For the IANA part of IS—IS, \
redundant information will be exist in two code points. The inconsistency will be \
emerged later when the additional sub-TLV is added under this code \
point.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">In conclusion, reusing the FAPM is the \
right direction to solve the mentioned use case in the updated draft.<o:p></o:p></p> \
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Aijun Wang<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">China Telecom<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On May 14, 2022, at 04:29, Acee Lindem \
(acee) &lt;acee=40cisco.com@dmarc.ietf.org&gt; wrote:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Hi Peter,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Thanks for addressing the WG last \
comments relating to terminology and IGP flex-algorithm data-plane granularity. I \
also have some editorial comments attached. These include:<o:p></o:p></p> \
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;1. Remove "new" from \
the text since these specifications will not be new when they are \
published.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;2. Fix the reference \
to the OSPFv3 Router Information Opaque LSA. As you know, there are no opaque LSAs in \
OSPFv3 since OSPFv3 natively supports LSA compatibility.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;3. Replace "ISIS" \
with "IS-IS".<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;4. Use American \
English spellings consistent with RFC style.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">One comments, for situations where we \
don't install any route in the data-plane, should we recommend logging an error? For \
example, in RFC 7684, we say:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This \
situation SHOULD be logged as an error.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">I was tempted to hyphenate \
"Flex-algorithm specific" and "algorithm specific" but didn't since they aren't in \
the base Flex-Algo specification.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Thanks,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Acee<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On 5/13/22, 9:59 AM, "Lsr on behalf of \
Peter Psenak" &lt;lsr-bounces@ietf.org on behalf of \
ppsenak=40cisco.com@dmarc.ietf.org&gt; wrote:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Hi \
Ketan,<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;sure, thanks for \
catching those, I'll fix them in next revision.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;thanks,<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Peter<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;On 13/05/2022 15:32, \
Ketan Talaulikar wrote:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Hi Peter,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Thanks for your updates to the draft \
and your responses below.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">I would like to point out a few \
remaining points to be fixed/addressed.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">a) There is a discrepancy regarding the \
size of the Metric field for the<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">OSPFv2 IP Algo Reachability sub-TLV \
between the figure and the text<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">description. The text needs to be fixed \
to reflect 4 octets size.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">b) For the OSPFv3 IP Algo Prefix \
Reachability sub-TLV the Type should be<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">2 octets and the discrepancy in the \
sub-TLV name in the Figure needs to<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">be corrected. Length should now become \
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">c) The references to the sections of \
draft-lsr-flex-algo in this<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">document need corrections in Sec 7 ? In \
general, I think the references<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">to the base draft sections 11, 12, and \
13 (except that M-flag is always<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">used) would be helpful.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Thanks,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Ketan<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On Wed, May 11, 2022 at 3:20 PM Peter \
Psenak &lt;ppsenak@cisco.com<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&lt;mailto:ppsenak@cisco.com \
&lt;mailto:ppsenak@cisco.com&gt;&gt;&gt; wrote:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Hi \
Ketan,<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;please see inline \
(##PP):<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;On 11/04/2022 08:25, \
Ketan Talaulikar wrote:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Hello All,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Following are some comments on this \
draft:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">1) Is this draft about opening the use \
of all IGP Algorithms for IP<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">(Algo) Routing or intended to be \
specific to Flexible Algorithms<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;(i.e.<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">algo 128-255) alone. I think it is \
important to specify the scope<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">unambiguously. Perhaps it makes sense \
to restrict the usage in this<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">particular document to FlexAlgorithms \
alone. If not, the draft<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;probably<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">needs an update and we need to also \
cover algo 1 (Strict SPF)<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">applicability and update the text to \
refer more generically to<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">algo-specific IP \
routing.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">2) The relationship between the algo \
usage for IP FlexAlgo and other<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">data planes (e.g. FlexAlgo with SR) is \
not very clear. There arise<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">complications when the algo usage for \
IP FlexAlgo overlap with other<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">(say SR) data planes since the FAD is \
shared but the node<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;participation<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">is not shared. While Sec 9 suggests \
that we can work through these<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">complications, I question the need for \
such complexity. The FlexAlgo<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">space is large enough to allow it to be \
shared between various data<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">planes without overlap. My suggestion \
would be to neither carve out<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">parallel algo spaces within IGPs for \
various types of FlexAlgo data<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">planes nor allow the same algo to be \
used by both IP and SR data<o:p></o:p></p> </blockquote>
</blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;planes.<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">So that we have a single topology \
computation in the IGP for a given<o:p></o:p></p> </blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">algo based on its FAD and data plane \
participation and then when it<o:p></o:p></p> </blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">comes to prefix calculation, the \
results could involve<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;programming \
of<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">entries in respective forwarding planes \
based on the signaling of<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;the<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">respective prefix reachabilities. The \
coverage of these aspects in a<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">dedicated section upfront will \
help.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;this has been \
discussed previously in this thread.<o:p></o:p></p> </blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">3) This draft makes assertions that IGP \
FlexAlgo cannot be deployed<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">without SR. This is not true since the \
base IGP FlexAlgo spec<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;explicitly<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">opens it up for usage outside of the SR \
forwarding plane. We already<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">have BIER and MLDP forwarding planes as \
users of the IGP<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;FlexAlgo. \
My<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">suggestion is to remove such assertions \
from the document. It is<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">sufficient to just say that the \
document enables the use of IGP<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;FlexAlgo<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">for IP prefixes with native IP \
forwarding.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">4) The draft is mixing up "address" and \
"prefix" in some places. IGP<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">path computation is for prefixes and \
not addresses. There are a few<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">instances where "address" should be \
replaced by "prefix".<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;References \
to<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">RFC791 and RFC8200 seem \
unnecessary.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">5) The draft does not cover the actual \
deployment use-case or<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">applicability of IP FlexAlgo. The text \
in Sec 3 is not clear and<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">insufficient. What is the point/use of \
sending traffic to a<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;loopback \
of<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">the egress router? Perhaps it makes \
sense in a deployment where<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;IP-in-IP<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">encapsulation is used for delivering an \
overlay service? If so,<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;would \
be<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">better to clarify this. The other \
deployment scenario is where<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">"external" or "host/leaf prefixes" are \
associated with a FlexAlgo to<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">provide them a different/appropriate \
routing path through the<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;network.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Yet another is the use of IP FlexAlgo \
along with LDP. Sec 9 does not<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">address the topic well enough. I would \
suggest expanding and<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;clarifying<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">this and perhaps other such deployment \
use cases (or<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;applicability) \
in<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">the document in one of the earlier \
sections to provide a better<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;context<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">to the reader.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">6) It would be better to move the \
common (i.e. not protocol<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;specific)<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">text from 5.1 and 5.2 under 5. This \
might also apply to some<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;extent \
to<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">the contents of sec 6.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done. For section 6, \
I would prefer to keep it in the protocol specific<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;sections.<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">7) Most of the text with MUSTs in sec 5 \
doesn't really make sense in<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">repeating - this is covered in the base \
FlexAlgo spec already.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;The \
only<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">key/important MUST is the one related \
to using separate algo for IP<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">FlexAlgo over SR data planes. See my \
previous comment (2) above.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;I prefer to keep the \
MUSTs there<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">8) Sec 5.1, the SHOULD needs to be MUST \
in the text below.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;A router receiving \
multiple IP Algorithm<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;sub-TLVs from the \
same originator SHOULD select the first<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;advertisement in the \
lowest-numbered LSP and subsequent<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;instances \
of<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;the IP Algorithm \
Sub-TLV MUST be ignored.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done.<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">9) Sec 5.1, I would suggest changing \
the following text as<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;indicated.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Also, perhaps add that the algo 0 MUST \
NOT be advertised and a<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;receiver<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">MUST ignore if it receives algo \
0.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">OLD<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;The IP Algorithm \
Sub-TLV could be used to advertise<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;support for non-zero \
standard algorithms, but that is outside the<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;scope of this \
document.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">NEW<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;The use of IP \
Algorithm Sub-TLV to advertise support for<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;algorithms<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;outside the \
flex-algorithm range is outside the<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;scope of this \
document.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">10) Sec 5.1, the SHOULD needs to be \
MUST in the text below<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;The IP Algorithm TLV \
is optional. &nbsp;It SHOULD only be<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;advertised \
once<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;in the Router \
Information Opaque LSA.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">11) Sec 6. The following text is better \
moved into the respective<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">protocol sub-sections. OSPFv3 is not \
covered anyway by it.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Two new top-level \
TLVs are defined in ISIS [ISO10589<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo#ref-ISO10589<o:p></o:p></p>
 </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo#ref-ISO10589 \
&lt;https://datatracker.ietf.org/doc/html/draft-ietf-lsr-ip-flexalgo#ref-ISO10589&gt;&gt;&gt;]<o:p></o:p></p>
 </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;to \
advertise<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;prefix reachability \
associated with a Flex-Algorithm.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;* &nbsp;The IPv4 \
Algorithm Prefix Reachability TLV<o:p></o:p></p> </blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;* &nbsp;The IPv6 \
Algorithm Prefix Reachability TLV<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;New top-level TLV of \
OSPFv2 Extended Prefix Opaque LSA<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;[RFC7684 \
&nbsp;&lt;https://datatracker.ietf.org/doc/html/rfc7684<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;https://datatracker.ietf.org/doc/html/rfc7684 \
&lt;https://datatracker.ietf.org/doc/html/rfc7684&gt;&gt;&gt;] is<o:p></o:p></p> \
</blockquote> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;defined to advertise \
prefix reachability associated with a Flex-<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Algorithm in \
OSPFv2.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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</blockquote>
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</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">12) Sec 6.1 &amp; 6.2. There is no \
discussion regd the use of the Prefix<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Attribute Flags sub-TLV with the new \
top-level TLVs.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">I think their usage MUST (or at least \
SHOULD) be included as it<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;helps<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">determine the route type and prefix \
attributes that<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">have proven to be quite useful for \
various use cases and deployments.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Why? We have a text \
that says:<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;"This new TLV shares \
the sub-TLV space defined for TLVs 135, 235, 236<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;and \
237."<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Why do we need to \
describe the usage of the specific sub-TLV?<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">13) Sec 6.2 what happens when the same \
prefix is advertised as SRv6<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Locator as well as IPv6 Algo Prefix \
(same or conflicting algos).<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Perhaps<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">both must be ignored?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">The same applies for OSPFv3 as \
well.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">14) Sec 6.3, OSPFv2 MT-ID reference \
should be RFC4915. Perhaps<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;the \
range<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">of MT should be mentioned since it is a \
8 bit field here.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">15) Sec 6.4, the metric field in the \
sub-TLV has to be 32-bit. While<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">24-bit is ok when the FAD uses IGP \
metric, it will not suffice<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;for \
other<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">IGP metric types.<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">16) Sec 6.3 &amp; 6.4, the conflict \
checking with base algo 0 prefix<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">reachability cannot be limited only to \
the OSPFv2/3 Extended LSAs<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;but<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">should also cover the base fixed form \
&gt;<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">OSPFv2/v3 LSAs. We could use a more \
generic term like "normal prefix<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">reachability" advertisements perhaps to \
cover the different LSAs?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
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</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">17) Sec 7 and 8, suggest to not use the \
term "application" to avoid<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">confusion with ASLA. My understanding \
is that there is a single<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;FlexAlgo<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">application when it comes to \
ASLA.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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</blockquote>
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</blockquote>
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</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Perhaps the intention here is "data \
plane" ?<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">18) The relationship between the BIER \
IPA and this draft needs some<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">clarifications - should the BIER WG be \
notified if they want to<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;update<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">draft-ietf-bier-bar-ipa?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">This (in some way) goes back to my \
comment (2) above.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;I don't see the \
relationship to BIER IPA here.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">19) Sec 8, what prevents the use of IP \
FlexAlgo paths programmed<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;by LDP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">as well. Or if the intention is to use \
them strictly for IP<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;forwarding \
only<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">then this needs to be \
clarified.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;nothing prevents \
someone to advertise LDP label for the IP algo-prefix<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;and use it with the \
labeled forwarding. I don't see a problem. But this<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;specification does \
not specify any of it.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">20) The following text in Sec 9 is \
about using the same FlexAlgo<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;(with \
a<o:p></o:p></p> </blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">common definition) for multiple \
data-planes at the same time. The<o:p></o:p></p> </blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;key is<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">that we only are able to \
use<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">prefix in one algo/data-plane? I am \
wondering if we can improve this<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">text to bring this out in a better way. \
Or altogether remove this<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;if we<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">agree to not allow sharing of \
algo<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">between different data planes to keep \
things simple.<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Multiple application \
can use the same Flex-Algorithm value at the<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;same time and and as \
such share the FAD for it. &nbsp;For example<o:p></o:p></p> </blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;SR-MPLS<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;and IP can both use \
such common Flex-Algorithm. &nbsp;Traffic for<o:p></o:p></p> </blockquote>
</blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;SR-MPLS<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;will be forwarded \
based on Flex-algorithm specific SR SIDs.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Traffic<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;for IP Flex-Algorithm \
will be forwarded based on Flex-Algorithm<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;specific prefix \
reachability announcements.<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;##PP<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Done.<o:p></o:p></p>
</blockquote>
</blockquote>
</blockquote>
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</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;thanks,<o:p></o:p></p> </blockquote>
</blockquote>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Peter<o:p></o:p></p>
</blockquote>
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<p class="MsoNormal" style="margin-left:.5in"><o:p>&nbsp;</o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">On Fri, Apr 8, 2022 at 12:38 AM Acee \
Lindem (acee)<o:p></o:p></p> </blockquote>
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style="margin-left:.5in">&lt;acee=40cisco.com@dmarc.ietf.org<o:p></o:p></p> \
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;mailto:40cisco.com@dmarc.ietf.org \
&lt;mailto:40cisco.com@dmarc.ietf.org&gt;&gt;<o:p></o:p></p> </blockquote>
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&lt;mailto:40cisco.com@dmarc.ietf.org&gt;&gt;&gt;&gt; wrote:<o:p></o:p></p> \
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;This begins a WG last \
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;draft had a lot of \
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;stable for some time. \
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;or objection to this \
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<p class="MsoNormal" \
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<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Lsr mailing \
list<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" style="margin-left:.5in">Lsr@ietf.org &lt;mailto:Lsr@ietf.org \
&lt;mailto:Lsr@ietf.org&gt;&gt; &lt;mailto:Lsr@ietf.org<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;mailto:Lsr@ietf.org \
&lt;mailto:Lsr@ietf.org&gt;&gt;&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">https://www.ietf.org/mailman/listinfo/lsr \
&lt;https://www.ietf.org/mailman/listinfo/lsr&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;https://www.ietf.org/mailman/listinfo/lsr \
&lt;https://www.ietf.org/mailman/listinfo/lsr&gt;&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;https://www.ietf.org/mailman/listinfo/lsr<o:p></o:p></p>
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;&lt;https://www.ietf.org/mailman/listinfo/lsr \
&lt;https://www.ietf.org/mailman/listinfo/lsr&gt;&gt;&gt;<o:p></o:p></p> \
</blockquote> </blockquote>
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<p class="MsoNormal" \
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Lsr mailing \
list<o:p></o:p></p> </blockquote>
</blockquote>
</blockquote>
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</blockquote>
</blockquote>
</blockquote>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal" \
style="margin-left:.5in">&nbsp;&nbsp;&nbsp;Lsr@ietf.org<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">https://www.ietf.org/mailman/listinfo/lsr \
&lt;https://www.ietf.org/mailman/listinfo/lsr&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
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<p class="MsoNormal" style="margin-left:.5in">Lsr mailing list<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Lsr@ietf.org<o:p></o:p></p>
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<p class="MsoNormal" \
style="margin-left:.5in">https://www.ietf.org/mailman/listinfo/lsr \
&lt;https://www.ietf.org/mailman/listinfo/lsr&gt;<o:p></o:p></p> </blockquote>
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<p class="MsoNormal" \
style="margin-left:.5in">_______________________________________________<o:p></o:p></p>
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<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Lsr mailing list<o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:.5in">Lsr@ietf.org<o:p></o:p></p>
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<p class="MsoNormal" \
style="margin-left:.5in">https://www.ietf.org/mailman/listinfo/lsr<o:p></o:p></p> \
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<p class="MsoNormal" style="margin-left:.5in"><br>
_______________________________________________<br>
Lsr mailing list<br>
Lsr@ietf.org<br>
https://www.ietf.org/mailman/listinfo/lsr<o:p></o:p></p>
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</blockquote>
</div>
</div>


<span>_______________________________________________</span><br><span>Lsr mailing \
list</span><br><span>Lsr@ietf.org</span><br><span>https://www.ietf.org/mailman/listinfo/lsr</span><br></div></blockquote></div></div></body></html>




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