Re: [spring] Request to close the LC and move forward//RE: WGLC - draft-ietf-spring-srv6-network-programming

Fernando Gont <fgont@si6networks.com> Wed, 26 February 2020 23:45 UTC

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Subject: Re: [spring] Request to close the LC and move forward//RE: WGLC - draft-ietf-spring-srv6-network-programming
To: "Eric Vyncke (evyncke)" <evyncke=40cisco.com@dmarc.ietf.org>, Warren Kumari <warren@kumari.net>, John Leddy <john@leddy.net>
Cc: SPRING WG List <spring@ietf.org>, "6man@ietf.org" <6man@ietf.org>, Bob Hinden <bob.hinden@gmail.com>, "Zafar Ali (zali)" <zali=40cisco.com@dmarc.ietf.org>
References: <F88E3F76-DD4B-4807-A458-85FABFF20D96@gmail.com> <5D218BFB-0D6F-4F7D-858F-B571A67DC47F@leddy.net> <CAHw9_iJ_ipEvU0NUx44XbK0_DrLe_GRw6G=m+chK4wZcRP8BMg@mail.gmail.com> <ACA082A4-BC78-4C63-9F91-5C9A44F47642@cisco.com>
From: Fernando Gont <fgont@si6networks.com>
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Date: Wed, 26 Feb 2020 20:45:13 -0300
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Hello, Eric,

On 26/2/20 20:18, Eric Vyncke (evyncke) wrote:
> Writing this without any hat,
> 
> Please note that on the logical side, it still have to be "proven" that this idea is strictly forbidden by RFC 8200. 

Here's the proof part:

1) Isn't IPv6 end to end?

2) How do core components of IPv6, such as AH and PMTUD work in the 
present of intermediate nodes that can add and/or remove arbitrary 
extension headers?

It should be clear from the above that EH insertion/deletion is forbidden.

Since this topic has been brought up again and again, I have submitted 
an errata to RFC8200 which clarifies the intended behaviour:
* https://www.rfc-editor.org/errata/eid5933

(that's what Errata's are for, after all... and it should be clear that 
the EH processing part, overall, needs improvements).

Thanks!

Cheers,
-- 
Fernando Gont
SI6 Networks
e-mail: fgont@si6networks.com
PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492