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Re: Unknown header extension or option

Brian E Carpenter <brian.e.carpenter@gmail.com> Sat, 22 November 2014 18:58 UTC

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Date: Sun, 23 Nov 2014 07:58:10 +1300
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Fernando Gont <fgont@si6networks.com>
Subject: Re: Unknown header extension or option
References: <54667C2C.6000509@gmail.com> <5466AB5C.9070806@acm.org> <D08FE588.32D32%evyncke@cisco.com> <CAESTAVuf=Bw3F4R-qc=o5m5iRzTJFRM1PXr7ORGM354rYovpJw@mail.gmail.com> <A190841A-32E5-423E-BA58-FB816227AB0A@cisco.com> <00423ECC-0B11-40AF-9AE4-E6577B0DBE77@townsley.net> <A3FE6519-0089-45D5-831C-A1CAB57473F8@cisco.com> <6E6055FF-09A0-4323-9570-4B8CD033CC26@townsley.net> <2434FDC7-A918-4FC0-BBD8-708FBC08A79F@cisco.com> <F23BC0AC-0785-41BC-A493-1D1A3037FA2C@cisco.com> <ABF588CA-2205-4102-8060-42421FD95EF1@cisco.com> <54709FD8.9040900@si6networks.com>
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Archived-At: http://mailarchive.ietf.org/arch/msg/ipv6/xvxagcGmRVSGNDElPy6f4FM6z7s
Cc: Ole Troan <ot@cisco.com>, 6man WG <ipv6@ietf.org>, "Fred Baker (fred)" <fred@cisco.com>
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On 23/11/2014 03:38, Fernando Gont wrote:
> Hi, Ole,
> 
> On 11/17/2014 05:45 PM, Ole Troan wrote:
> [....]
>> because there is no way an implementation can skip past an unknown
>> header, unless we declared that every new IP protocol must have the
>> same field layout in the preamble.
> 
> Or that we do this:
> <http://tools.ietf.org/id/draft-gont-6man-ipv6-universal-extension-header-01.txt>

In any case it's IMHO a lot more complicated than an erratum in 2460
can possibly fix; we already have two RFCs that update 2460 in this
area (6564, 7045) and three normative drafts (draft-gont-opsec-ipv6-eh-filtering,
draft-gont-6man-ipv6-opt-transmit, draft-gont-6man-ipv6-universal-extension-header).
Plus approved and proposed updates to the routing header.

    Brian

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