Re: [spring] We don't seem to be following our processes (Re: Network Programming - Penultimate Segment Popping)
Robert Raszuk <robert@raszuk.net> Sat, 07 December 2019 11:47 UTC
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From: Robert Raszuk <robert@raszuk.net>
Date: Sat, 07 Dec 2019 12:47:05 +0100
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To: Fernando Gont <fgont@si6networks.com>
Cc: Brian E Carpenter <brian.e.carpenter@gmail.com>, Andrew Alston <Andrew.Alston@liquidtelecom.com>, Ole Troan <otroan@employees.org>, Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>, SPRING WG <spring@ietf.org>, 6man <6man@ietf.org>, "int-ads@ietf.org" <int-ads@ietf.org>, rtg-ads <rtg-ads@ietf.org>, Bob Hinden <bob.hinden@gmail.com>
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Subject: Re: [spring] We don't seem to be following our processes (Re: Network Programming - Penultimate Segment Popping)
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Hey Fernando, (pop when you are the destination but SL!=0 is essentially 'in the > network removal') I was trying to stay out of this but I have one fundamental question or observation this entire debate seems to be about. In the context of SRv6 there are two parallel discussions *Discussion #1* - It is about inserting, modifying or deleting SRH by nodes which are not in the outer IPv6 header of the packet *Discussion #2* - It is about RFC8200 compliance when the node doing insertion of SRH is *the* destination of the packet as read verbatim from the outer IPv6 header. *Discussion #3* - It is about RFC8200 compliance when the node doing modification or removal of SRH is *the* destination of the packet as read verbatim from the outer IPv6 header. First let's observe that RFC8200 is only defining the behaviour regarding EH processing in the context of destination address of the IPv6 outer header: "identified in the Destination Address field of the IPv6 header.identified in the Destination Address field of the IPv6 header. " Therefore stating that SL value before local decrement matters in this in respect to being compliant to the IPv6 RFC is at best just an individual interpretation. Besides the pseudocode says it black and white "S14.1. If (updated SL == 0) {". We do all sort of processing decision after decrementing the values ... think TTL :) So back to reality ... *Discussion #1* - I think we all agree that to accomplish that RFC8200 would need to be updated. *Discussion #2* - I think we also all agree here that to accomplish this RFC8200 would need to be updated as it does says clearly that "Each extension header should occur at most once, ..." *Discussion #3* - It seems clearly that there is no issue with compliance with RFC8200 and that if penultimate segment midpoint decides or is instructed to pop SRH it sure can and still be 100% compliant with current wording of RFC8200. So other then so much foam what is this debate all about ? Cheers, Robert.
- [spring] Network Programming - Penultimate Segmen… Ron Bonica
- Re: [spring] Network Programming - Penultimate Se… Fernando Gont
- Re: [spring] Network Programming - Penultimate Se… Darren Dukes (ddukes)
- Re: [spring] Network Programming - Penultimate Se… Ron Bonica
- Re: [spring] Network Programming - Penultimate Se… Fernando Gont
- Re: [spring] Network Programming - Penultimate Se… otroan
- Re: [spring] Network Programming - Penultimate Se… Ron Bonica
- Re: [spring] Network Programming - Penultimate Se… otroan
- Re: [spring] Network Programming - Penultimate Se… Fernando Gont
- [spring] We don't seem to be following our proces… Fernando Gont
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Tom Herbert
- Re: [spring] We don't seem to be following our pr… Ron Bonica
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… Enno Rey
- Re: [spring] We don't seem to be following our pr… Enno Rey
- Re: [spring] We don't seem to be following our pr… Ron Bonica
- Re: [spring] We don't seem to be following our pr… Bob Hinden
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Joel M. Halpern
- Re: [spring] We don't seem to be following our pr… Sander Steffann
- Re: [spring] We don't seem to be following our pr… Tom Herbert
- Re: [spring] We don't seem to be following our pr… Robert Raszuk
- Re: [spring] We don't seem to be following our pr… Sander Steffann
- Re: [spring] We don't seem to be following our pr… Robert Raszuk
- Re: [spring] We don't seem to be following our pr… Bob Hinden
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… Tom Herbert
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Andrew Alston
- Re: [spring] We don't seem to be following our pr… Andrew Alston
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Ron Bonica
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Ron Bonica
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] Network Programming - Penultimate Se… Darren Dukes (ddukes)
- Re: [spring] Network Programming - Penultimate Se… Ron Bonica
- Re: [spring] We don't seem to be following our pr… Ole Troan
- Re: [spring] We don't seem to be following our pr… Andrew Alston
- Re: [spring] We don't seem to be following our pr… Sander Steffann
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… otroan
- Re: [spring] We don't seem to be following our pr… Brian E Carpenter
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] We don't seem to be following our pr… Brian E Carpenter
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- [spring] Separating issues (was Re: We don't seem… Suresh Krishnan
- [spring] Penultimate Segment Popping and RFC8200 … Suresh Krishnan
- Re: [spring] Separating issues (was Re: We don't … Ketan Talaulikar (ketant)
- Re: [spring] Penultimate Segment Popping and RFC8… Ketan Talaulikar (ketant)
- Re: [spring] We don't seem to be following our pr… Robert Raszuk
- Re: [spring] We don't seem to be following our pr… Alexandre Petrescu
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Network Programming - Penultimate Se… Darren Dukes (ddukes)
- Re: [spring] Network Programming - Penultimate Se… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] We don't seem to be following our pr… Darren Dukes (ddukes)
- Re: [spring] We don't seem to be following our pr… Robert Raszuk
- Re: [spring] Network Programming - Penultimate Se… Tom Herbert
- Re: [spring] Network Programming - Penultimate Se… Robert Raszuk
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] We don't seem to be following our pr… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Brian E Carpenter
- Re: [spring] Penultimate Segment Popping and RFC8… Adrian Farrel
- Re: [spring] We don't seem to be following our pr… Brian E Carpenter
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] We don't seem to be following our pr… bruno.decraene
- Re: [spring] Penultimate Segment Popping and RFC8… bruno.decraene
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Mark Smith
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Brian E Carpenter
- Re: [spring] Penultimate Segment Popping and RFC8… bruno.decraene
- Re: [spring] Penultimate Segment Popping and RFC8… Pablo Camarillo (pcamaril)
- Re: [spring] Penultimate Segment Popping and RFC8… Robert Raszuk
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- Re: [spring] Penultimate Segment Popping and RFC8… Fernando Gont
- [spring] Non-final destination address (was Re: P… Suresh Krishnan
- Re: [spring] Non-final destination address (was R… Fernando Gont
- Re: [spring] Non-final destination address (was R… Suresh Krishnan
- Re: [spring] Non-final destination address (was R… Fernando Gont