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List: ipng
Subject: =?Windows-1252?Q?RE:_[spring]_=93SRV6+=94_complexity_in_forwarding?=
From: Ron Bonica <rbonica=40juniper.net () dmarc ! ietf ! org>
Date: 2019-09-20 17:33:02
Message-ID: BYAPR05MB546399AFDFE4D13FF853A0ACAE880 () BYAPR05MB5463 ! namprd05 ! prod ! outlook ! com
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Robert,
Even then, the core SP router may ignore the PSSI.
Recall that the first two bits of the PSSI option are 00. This means that i=
f the processing node doesn=92t recognize the PSSI, or is configured to ign=
ore the PSSI, it will simple skip over the PSSI.
In most cases, core SP routers will be configured to ignore the PSSI.
=
Ron
From: Robert Raszuk <robert@raszuk.net>
Sent: Friday, September 20, 2019 1:22 PM
To: Ron Bonica <rbonica@juniper.net>
Cc: Dirk Steinberg <dirk@lapishills.com>; Tom Herbert <tom@herbertland.com>=
; Darren Dukes (ddukes) <ddukes@cisco.com>; xiechf@chinatelecom.cn; SPRING =
WG <spring@ietf.org>; 6man <6man@ietf.org>; Rob Shakir <robjs@google.com>; =
Tarek Saad <tsaad.net@gmail.com>
Subject: Re: [spring] =93SRV6+=94 complexity in forwarding
Hi Ron,
No one is questioning that. If packet's destination is not a local address =
of a router all options can be ignored.
Fun however starts when destination address in the packet *is* a local addr=
ess on the router ie. the router is acting as Segment Endpoint.
Thx,
R.
On Fri, Sep 20, 2019 at 7:09 PM Ron Bonica <rbonica@juniper.net<mailto:rbon=
ica@juniper.net>> wrote:
Likewise, SP core routers would ignore the PSSI and wouldn=92t even see the=
PPSI.
Ron
From: Dirk Steinberg <dirk@lapishills.com<mailto:dirk@lapishills.com>>
Sent: Wednesday, September 18, 2019 7:40 PM
To: Tom Herbert <tom@herbertland.com<mailto:tom@herbertland.com>>
Cc: Darren Dukes (ddukes) <ddukes@cisco.com<mailto:ddukes@cisco.com>>; xiec=
hf@chinatelecom.cn<mailto:xiechf@chinatelecom.cn>; SPRING WG <spring@ietf.o=
rg<mailto:spring@ietf.org>>; 6man <6man@ietf.org<mailto:6man@ietf.org>>; Ro=
bert Raszuk <robert@raszuk.net<mailto:robert@raszuk.net>>; Ron Bonica <rbon=
ica@juniper.net<mailto:rbonica@juniper.net>>; Rob Shakir <robjs@google.com<=
mailto:robjs@google.com>>; Tarek Saad <tsaad.net@gmail.com<mailto:tsaad.net=
@gmail.com>>
Subject: Re: [spring] =93SRV6+=94 complexity in forwarding
SRv6 does not require TLV processing for normal forwarding (use case: SP co=
re).
- Dirk
Juniper Business Use Only
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<p class="MsoNormal">Robert,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Even then, the core SP router may ignore the \
PSSI.<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Recall that the first two bits of the PSSI option are 00. This \
means that if the processing node doesn’t recognize the PSSI, or is configured to \
ignore the PSSI, it will simple skip over the PSSI.<o:p></o:p></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal">In most cases, core SP \
routers will be configured to ignore the PSSI.<o:p></o:p></p> <p \
class="MsoNormal"><o:p> </o:p></p> <p \
class="MsoNormal"> &n \
bsp; &nbs \
p; \
&n \
bsp; \
Ron<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>From:</b> Robert Raszuk <robert@raszuk.net> <br>
<b>Sent:</b> Friday, September 20, 2019 1:22 PM<br>
<b>To:</b> Ron Bonica <rbonica@juniper.net><br>
<b>Cc:</b> Dirk Steinberg <dirk@lapishills.com>; Tom Herbert \
<tom@herbertland.com>; Darren Dukes (ddukes) <ddukes@cisco.com>; \
xiechf@chinatelecom.cn; SPRING WG <spring@ietf.org>; 6man \
<6man@ietf.org>; Rob Shakir <robjs@google.com>; Tarek Saad \
<tsaad.net@gmail.com><br> <b>Subject:</b> Re: [spring] “SRV6+” complexity \
in forwarding<o:p></o:p></p> <p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">Hi Ron,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">No one is questioning that. If packet's destination is not a \
local address of a router all options can be ignored. <o:p></o:p></p> </div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Fun however starts when destination address in the packet *is* a \
local address on the router ie. the router is acting as Segment \
Endpoint. <o:p></o:p></p> </div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thx,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">R.<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">On Fri, Sep 20, 2019 at 7:09 PM Ron Bonica <<a \
href="mailto:rbonica@juniper.net">rbonica@juniper.net</a>> wrote:<o:p></o:p></p> \
</div> <blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in \
0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"> \
<div> <div>
<p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Likewise, SP core routers \
would ignore the PSSI and wouldn’t even see the PPSI.<o:p></o:p></p> <p \
class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> &nb \
sp;   \
; & \
nbsp; \
Ron<o:p></o:p></p> </div>
</div>
</blockquote>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in \
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"> <div>
<div>
<p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> <p \
class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>From:</b> Dirk \
Steinberg <<a href="mailto:dirk@lapishills.com" \
target="_blank">dirk@lapishills.com</a>> <br>
<b>Sent:</b> Wednesday, September 18, 2019 7:40 PM<br>
<b>To:</b> Tom Herbert <<a href="mailto:tom@herbertland.com" \
target="_blank">tom@herbertland.com</a>><br> <b>Cc:</b> Darren Dukes (ddukes) \
<<a href="mailto:ddukes@cisco.com" target="_blank">ddukes@cisco.com</a>>; <a \
href="mailto:xiechf@chinatelecom.cn" target="_blank">xiechf@chinatelecom.cn</a>; \
SPRING WG <<a href="mailto:spring@ietf.org" \
target="_blank">spring@ietf.org</a>>; 6man <<a href="mailto:6man@ietf.org" \
target="_blank">6man@ietf.org</a>>; Robert Raszuk <<a \
href="mailto:robert@raszuk.net" target="_blank">robert@raszuk.net</a>>; Ron \
Bonica <<a href="mailto:rbonica@juniper.net" \
target="_blank">rbonica@juniper.net</a>>; Rob Shakir <<a \
href="mailto:robjs@google.com" target="_blank">robjs@google.com</a>>; Tarek Saad \
<<a href="mailto:tsaad.net@gmail.com" \
target="_blank">tsaad.net@gmail.com</a>><br> <b>Subject:</b> Re: [spring] \
“SRV6+” complexity in forwarding<o:p></o:p></p> <p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> \
<div> <p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">SRv6 does not require TLV \
processing for normal forwarding (use case: SP core).<o:p></o:p></p> <div>
<p class="MsoNormal" \
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p> \
</div> <div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">- \
Dirk<o:p></o:p></p> </div>
</div>
</div>
</div>
</blockquote>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="msipfooter30b3d538" align="center" \
style="margin:0in;margin-bottom:.0001pt;text-align:center"> <span \
style="font-size:7.0pt;color:black">Juniper Business Use Only</span><o:p></o:p></p> \
</div> </div>
</div>
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