On 02/09/2016 06:46 PM, Doug Royer wrote: > On 02/09/2016 01:26 PM, Joe Touch wrote: > >> >> So if you have tunnels, fragmentation services are always ultimately >> required. > > And when broken (like with my ISP), I had to reduce my MTU to 1442. > Because it looks like fragmentation is failing over any IPv6 connection > I can use. Or perhaps its some kind of IPv6 restriction I can' find. Dropping of IPv6 fragments is, unfortunately, widespread. Please see: <https://www.ietf.org/id/draft-ietf-v6ops-ipv6-ehs-in-real-world-02.txt>. Thanks! Cheers, -- Fernando Gont SI6 Networks e-mail: fgont@xxxxxxxxxxxxxxx PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492