Re: [tsvwg] Protocol ossification in draft-ietf-tsvwg-transport-encrypt-07.txt

Joe Touch <touch@strayalpha.com> Tue, 09 July 2019 04:35 UTC

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From: Joe Touch <touch@strayalpha.com>
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Date: Mon, 8 Jul 2019 21:35:46 -0700
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To: Tom Herbert <tom@herbertland.com>
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Subject: Re: [tsvwg] Protocol ossification in draft-ietf-tsvwg-transport-encrypt-07.txt
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> On Jul 8, 2019, at 8:05 AM, Tom Herbert <tom@herbertland.com>; wrote:
> 
> "A reliance on the presence and semantics of specific header
> information  leads to ossification…"


Relying on the semantics of a protocol header is also called a standard. 

> “...In some case this could be benign or advantageous to
> the protocol”

> I am dubious about any statement that protocol ossification of
> transport layer by middleboxes is a good thing.


Ossification and stability are two sides of exactly the same coin.

It’s called ossification when the variation of a standard is no longer supported, e.g., because of middleboxes assumptions beyond that defined by the standard.

It’s called stability when we can rely on a set of definitions that constrain arbitrary variation in controlled ways.

Joe