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Re: [Detnet] [mpls] [Pals] draft-decraene-mpls-slid-encoded-entropy-label-id (was RE: Please review the PALS/MPLS/DetNet Joint Session minutes)

bruno.decraene@orange.com Fri, 01 April 2022 18:06 UTC

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From: bruno.decraene@orange.com
To: Tony Li <tony.li@tony.li>
CC: John E Drake <jdrake=40juniper.net@dmarc.ietf.org>, mpls <mpls@ietf.org>, detnet WG <detnet@ietf.org>, "pals@ietf.org" <pals@ietf.org>, "Henderickx, Wim (Nokia - BE/Antwerp)" <wim.henderickx@nokia.com>, Greg Mirsky <gregimirsky@gmail.com>
Thread-Topic: [mpls] [Pals] draft-decraene-mpls-slid-encoded-entropy-label-id (was RE: Please review the PALS/MPLS/DetNet Joint Session minutes)
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Date: Fri, 01 Apr 2022 18:06:14 +0000
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Subject: Re: [Detnet] [mpls] [Pals] draft-decraene-mpls-slid-encoded-entropy-label-id (was RE: Please review the PALS/MPLS/DetNet Joint Session minutes)
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Tony,





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From: Tony Li <tony1athome@gmail.com> On Behalf Of Tony Li
Sent: Friday, April 1, 2022 7:49 PM
To: DECRAENE Bruno INNOV/NET <bruno.decraene@orange.com>
Cc: John E Drake <jdrake=40juniper.net@dmarc.ietf.org>; mpls <mpls@ietf.org>; detnet WG <detnet@ietf.org>; pals@ietf.org; Henderickx, Wim (Nokia - BE/Antwerp) <wim.henderickx@nokia.com>; Greg Mirsky <gregimirsky@gmail.com>
Subject: Re: [mpls] [Pals] draft-decraene-mpls-slid-encoded-entropy-label-id (was RE: Please review the PALS/MPLS/DetNet Joint Session minutes)


Bruno,



- again draft-decraene-mpls-slid-encoded-entropy-label-id can be extended to support in-stack data if needed (this has been expressed multiple times) i.e. if post-stack data is found not to be enough.


Extending your proposal to support in-stack data effectively puts us at draft-jags-mpls-ext-hdr-00, with the backward compatibility issues that we've discussed. That is, IMHO, no longer in the realm of acceptable risk.
[Bruno] Extending the proposal to add LSE requires signaling that the Egress support that capability. Solutions requiring a new SPL requires a similar signaling. In both cases, I don't think that this may be called a backward compatibility issue, if but so, I think the statement equally applies to other proposals defining a new SPL

--Bruno

Tony


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