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Re: [tsvwg] RDMA Support by UDP FRAG Option

Joe Touch <touch@strayalpha.com> Mon, 21 June 2021 18:19 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Mon, 21 Jun 2021 11:19:39 -0700
Cc: Gorry Fairhurst <gorry@erg.abdn.ac.uk>, TSVWG <tsvwg@ietf.org>
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To: "C. M. Heard" <heard@pobox.com>
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Subject: Re: [tsvwg] RDMA Support by UDP FRAG Option
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> On Jun 21, 2021, at 9:37 AM, C. M. Heard <heard@pobox.com> wrote:
> 
>> On Mon, Jun 21, 2021 at 8:48 AM Joseph Touch wrote:
>> …
>> > In my opinion, the best chance for UDP options to be deployable and
>> > successful is to require that the surplus area always sums to zero.
>> 
>> When UDP CS==0, OCS provides that capability.
> 
> It would, if the requirement for a receiver to check OCS when it is present were dropped when UCP CS==0.

Why / how does this help? 

Joe

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