Hi Gorry,
Just for fun I took a look at this and I could understand the concern if we're talking about restricting to particular EHs, but I don't see the draft as limiting EH types. How does your concern play out in this case?
Eliot
On 01/12/2024 21:36, Tom Herbert wrote:
But my bigger issue with this review is the repeated insinuation that this draft would somehow ossify IPv6 or impede evolution of IPv6 or transports. I believe this characterization is wholly unfounded, unfair, and incorrect. Please comment on this. And if you do want to argue that *this* draft somehow impedes IPv6 or Transport layer evolution then please give specific examples; as I mentioned just expecting everyone to support unlimited extensibility isn't feasible (and note that I gave an example of the cost of unlimited extensibility in a DoS attack). TomPersonally, I do like the principle of setting some minimum expectations to increase deployability of extension headers.
I see some feedback on my use of the word "ossify": by which I mean the possibility that this I-D could cause header formats to become fixed and then unable to change the format.
For me, fixing minimum values at endpoints is likely to be changeable in future, but deploying limits in a network device less so, and much less so where exceeding these result in packet discard, this included the new proposal for limits for “intermediate nodes”. There are other comments.
Please don’t assume as a reviewer whether I would love or hate to see the final publication of this document. The review notes things seen as needing attention and things needed to be stated clearly and consistently beyond doubt, so choice of wording in the I-D matters. I’d be happy to look again at a new revision, if you plan one.
Best wishes,
Gorry
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