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Re: [quicwg/base-drafts] Client connection IDs are broken (#2844)

Igor Lubashev <notifications@github.com> Fri, 26 July 2019 23:16 UTC

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Subject: Re: [quicwg/base-drafts] Client connection IDs are broken (#2844)
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@DavidSchinazi **Short answer**: saving bytes on the wire.

**Long answer**:

A server may need to support both regular clients (so using a server CID) as well as peer servers in the datacenter (or some SDN). It may be trivial to identify such peers (anyone using 10.0.0.0/8), so why waste CID in each packet when talking to 10.0.0.0/8 machines?  Moreover, QUIC now supports huge Server CIDs (up to 20 bytes), and if that's what's needed for regular clients, that's wasting 20 bytes per packet on internal communications.

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