26.1.1 MTU Issues on PPPoE

[Taunt9930]

This does not look like an MTU issue if you can use those ping sizes - it look just fine.

Did you also use traffic shaping? Maybe the old ISP had lower speeds and you shape it to fit? Happened before...

Just saw that you disabled all shaping...

No idea what could be wrong.

It's a weird one, isn't it!?

When I've got more time I'll try a 3rd update from the working 25.7 snapshot.

[Boxer]

I would roll back to 25.7.11_9, delete your wan mtu and leave it blank, reboot. Then update to 26.1 and re-enter your wan mtu 1508. Maybe there's some shenanigans during the update

[ProximusAl]

I'm following this intently, as I've just ordered Zen and want to use 1508 MTU.

Please keep us updated...