Re: [quicwg/base-drafts] Specify DCID of 0-RTT packets (#2398)

MikkelFJ <> Fri, 08 February 2019 21:25 UTC

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Subject: Re: [quicwg/base-drafts] Specify DCID of 0-RTT packets (#2398)
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Yes, along with the session ticket. The ticket transfer is a bit of a black box so I can only propose the high level concept. (I'm wondering if Retry and 0-RTT could be made more similar, but whatever).

> That's been discussed before, and while it makes sense to me, it means that load balancers need to be able to differentiate the two types (and potentially sizes) of CID.

At least such that they have an option to do so if they are so inclined. I.e. there is no immediate downside since you can also just provide a standard CID if that is better for a particular infrastructure.

As to sizes, that was a bigger problem a while ago when the CID size was implicit. Also, since the CID is only used for 0-RTT, it can be large without significant cost - it should/could be changed immediately upon 0-RTT server acceptance.

As to v1, I agree that might be stretching it a bit.

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