Re: [Int-area] Document shepherd comments on 'draft-ietf-intarea-gue-05'

Joe Touch <touch@strayalpha.com> Sat, 01 September 2018 18:02 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Sat, 1 Sep 2018 11:02:36 -0700
Cc: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>, "Int-area@ietf.org" <Int-area@ietf.org>
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To: Tom Herbert <tom@herbertland.com>
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Subject: Re: [Int-area] Document shepherd comments on 'draft-ietf-intarea-gue-05'
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> On Sep 1, 2018, at 11:00 AM, Tom Herbert <tom@herbertland.com> wrote:
> 
>> FWIW, IP fragmentation copies the IP header in each fragment because that
>> field is part of the context for the ID field; i.e., ID MUST be unique
>> within src/dst/proto. If fragments had a different proto field, it would
>> undermine that context.
>> 
> Hi Joe,
> 
> The GUE fragmentation option includes a orig-proto field to hold the
> protocol of the reassembled packet. That needs to be matched in all
> fragments along with srd/dst and ID, Also the protocol field in the
> GUE header of the first fragment must also match. So the ID space is
> basically defined the same way as IP fragmentation.

Understood - I was explaining why IP couldn’t use “no next proto” in the next proto field.

Joe