Re: [quicwg/base-drafts] ICMP and ICMPv6 PMTUD with asymmetric connection-ids (#1243)

[Gorry Fairhurst <[e-mail]>]

I see, I think this use of the Server CID seems to provide what is 
described as the "protocol information in the quoted payload"  in 4.3  
(Verification and Use of PTB Messages) of the dplpmtud draft.

Gorry

On 30/06/2018, 13:49, Igor Lubashev wrote:
>
> All ICMPv6 and a growing number of ICMPv4 packets include a few 
> hundred octets of the packet that triggered that ICMP.
>
> A QUIC sender can be behind a load balancer that requires a Server CID 
> to route packets to that server (this is what we designed Server CID 
> for). However, short header packets do not contain Server CID. Hence, 
> when doing a PMTUD probe, such servers may need to use something that 
> would ensure the presence of Server CID in the UDP datagram. (I.e. 
> they may want to use this method when sending packets larger than any 
> packet for which they had received an ACK from this path before.)
>
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