The path MTU is available to applications. It seems like a bug in QUIC or Chrome to not send smaller packets when it can know the packets will be fragmented. Or just use TCP.
On Fri, Jan 23, 2015 at 11:55:57AM +0900, Lorenzo Colitti wrote: > Thanks for reporting this. What was the effect? Connections just getting > stuck? > Was there fallback to IPv4? > > Personally I don't understand why everyone behind a manually-configured tunnel > doesn't set the MTU in the RA to the MTU of the tunnel... but that's not an > excuse for things not working. > > On Fri, Jan 23, 2015 at 11:45 AM, Mikael Abrahamsson <swm...@swm.pp.se> wrote: > > > I had another problem with Youtube just now, with Chrome+OSX. I saw my > machine sending fragmented UDP-packets to google on 443, which it was not > getting any responses to. On a hunch, I disabled QUIC in Chrome which made > things start working again. > > 03:20:45.891286 IP6 2001:470:X > 2a02:808:1:100::c: frag (0|1232) 59430 > > 443: UDP, length 1350 > 03:20:45.891286 IP6 2001:470:X > 2a02:808:1:100::c: frag (1232|126) > > > -- > Mikael Abrahamsson?? ?? email: swm...@swm.pp.se > >
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