Mixed MTU hosts on a network

Roman Mamedov rm at romanrm.net
Sat Apr 14 15:40:18 CEST 2018

On Sat, 14 Apr 2018 15:16:56 +0200
"Jason A. Donenfeld" <Jason at zx2c4.com> wrote:

> Hi Roman,
> This commit should fix it. It now has a unit test too so that we don't
> hit this issue again. Thanks for reporting it in such detail.
> https://git.zx2c4.com/WireGuard/commit/?id=a88a067d5477f877003d3703bb3b95cb4e94bc46
> Let me know if that fixes it on your end.
> Jason

Thanks! I didn't get a chance to test it yet.

Leaving route MTUs aside, did you look into why the interface MTU of 1412
behaves erratically (while by all calculations it should just fit into 1492
underlying PPPoE MTU), with only 1408 working reliably? Is it also because of
the padding?

With respect,

More information about the WireGuard mailing list