On 2019-03-12 10:32, Nico Schottelius wrote: > > Good morning, > > is anyone from sbb.ch reading here? > > https://sbb.ch does not load on IPv6 for us. > It seems that packets > 1420 bytes are dropped inside the SBB network, > > Local PMTU / fragmentation seems to work, my local outgoing > MTU is 1420. MTR below.
Has been that way for years already. Long live load balancers & firewalls and people who run them and do not know what they are or how they work. Don't worry. Google had the same problem for a while and it took them a month or two to realize what the problem was and so did Cloudflare, at least the latter wrote it up so that other people can start getting the problem: https://blog.cloudflare.com/increasing-ipv6-mtu/ Thus, folks, please read and start fixing your setups... ICMPv6 is required in IPv6 and when you do any kind of load balancing, do honor PTBs... Greets, Jeroen _______________________________________________ swinog mailing list [email protected] http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
