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List: mpls
Subject: Re: [mpls] Concerns about ISD
From: John E Drake <jdrake=40juniper.net () dmarc ! ietf ! org>
Date: 2022-04-29 16:04:51
Message-ID: 535C336B-545F-4E0E-A9DF-990FC0AB53CC () juniper ! net
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Comment inline
Sent from my iPhone
On Apr 29, 2022, at 11:17 AM, Tianran Zhou <zhoutianran@huawei.com> wrote:
[External Email. Be cautious of content]
Hi,
Comments inline.
Tianran
>
> Hi John,
>
> If we want to reuse this for consistent design (easy for interop), how do you
> want to encode it to ISD?
>
> [JD] That's up to a given solution to propose, but probably two LSEs
>
> ZTR> It would be interesting to know your proposal.
[JD] As I said, the size of an NRP ID needs to be decided and any MNA solution needs \
propose how it is to be encoded
ZTR> Ok, so any solution need to demonstrate how it works.
>
>
> 2. If we really worry about the MSD of SR, why not use BSID as a direct way to
> reduce the stack?
>
> [JD] Because it can't be mandated
>
> ZTR> I am sorry, I do not understand why BSID is not applicable. What's the "
> mandated " mean here?
[JD] MNA cannot require the use of BSIDs
ZTR> Is this an agreed requirement? In the requirement draft? I still can't \
understand. On one hand, you worry about low stack depth. On the other hand, you \
don't want to use an easy way to solve this problem. [JD] I don't think it's \
realistic to tell a network operator that they have to deploy BSID in order to deploy \
MNA. Also, I don't think it's a good solution became a label stack of BSIDs may \
still be too large and the node advertising the BSID is going to expand the the label \
stack with the path SIDS so the nodes on the path will have to deal with a large \
label stack.
>
> Tianran
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Comment inline <br>
<br>
<div dir="ltr">Sent from my iPhone</div>
<div dir="ltr"><br>
<blockquote type="cite">On Apr 29, 2022, at 11:17 AM, Tianran Zhou \
<zhoutianran@huawei.com> wrote:<br> <br>
</blockquote>
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<div style="background-color:#FFEB9C; width:100%; border-style: none; \
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line-height:12pt; font-family:'Lato'; color:black; text-align: left; \
font-weight:bold"> <span style="color:black" ;="" font-weight:bold;="">[External \
Email. Be cautious of content]</span></div> <br>
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<div style="font-family:Calibri,Helvetica!important;font-size:17.0px;color:#333333">
<span style="color:#333333;font-size:17.0px;">Hi,</span><br>
<span style="color:#333333;font-size:17.0px;">Comments inline.</span><br>
<br>
<span style="color:#333333;font-size:17.0px;">Tianran </span></div>
<div name="AnyOffice-Background-Image" style="border-top: 1px solid #B5C4DF;padding: \
8px;"> <div><br>
</div>
<font size="2"><span style="font-size:10pt;">
<div class="PlainText">> <br>
> Hi John,<br>
> <br>
> If we want to reuse this for consistent design (easy for interop), how do \
you<br> > want to encode it to ISD?<br>
> <br>
> [JD] That's up to a given solution to propose, but probably two LSEs<br>
> <br>
> ZTR> It would be interesting to know your proposal.<br>
<br>
[JD] As I said, the size of an NRP ID needs to be decided and any MNA solution \
needs propose how it is to be<br> encoded <br>
<br>
ZTR> Ok, so any solution need to demonstrate how it works.</div>
<div class="PlainText"><br>
> <br>
> <br>
> 2. If we really worry about the MSD of SR, why not use BSID as a direct way \
to<br> > reduce the stack?<br>
> <br>
> [JD] Because it can't be mandated<br>
> <br>
> ZTR> I am sorry, I do not understand why BSID is not applicable. What's the \
"<br> > mandated " mean here?<br>
<br>
[JD] MNA cannot require the use of BSIDs<br>
</div>
<div class="PlainText">ZTR> Is this an agreed requirement? In the requirement \
draft? I still can't understand. On one hand, you worry about low stack depth. On the \
other hand, you don't want to use an easy way to solve this problem.</div> \
</span></font></div> </div>
</div>
</blockquote>
[JD] I don't think it's realistic to tell a network operator that they have to \
deploy BSID in order to deploy MNA. Also, I don't think it's a good solution \
became a label stack of BSIDs may still be too large and the node advertising the \
BSID is going to expand the the label stack with the path SIDS so the nodes on the \
path will have to deal with a large label stack.<br> <blockquote type="cite">
<div dir="ltr">
<div>
<div name="AnyOffice-Background-Image" style="border-top: 1px solid #B5C4DF;padding: \
8px;"> <font size="2"><span style="font-size:10pt;">
<div class="PlainText"><br>
</div>
<div class="PlainText"><br>
> <br>
> Tianran<br>
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