On Wed, 2018-02-07 at 20:46 +0100, Yves-Alexis Perez wrote: > Maybe. I tried with removing the MTU setting, and I get (on ping again) > > févr. 07 20:44:01 scapa kernel: mtu: 1266 > > which means I would get -EINVAL on standards kernels, which is not really good > either.
Actually after rebooting on the Debian 4.14.17 kernel, with the outter MTU unset (or set to 1360), I don't get the -EINVAL anymore, so maybe it'd be OK. Unfortunately I have the feeling that debugging this will be a bit tricky for other people. MTU tuning for tunnels are always a bit confusing, but having the kernel return EINVAL on a ping doesn't really help narrowing it down to that MTU setting. Not sure if some kind of logging could be added to help? Regards, -- Yves-Alexis
Description: This is a digitally signed message part