> During my experiments, I tried to change the MTU on the pppoe0 interface to
> 1500 caused my machine to freeze, couldn't break into ddb or anything :(

Maybe the interface should reject such invalid requests ;-)

> Should the ethernet interface underlying the pppoe connection (in my case,
> rtk0) also have its mtu set to 1452?

No (and it probably doesn't matter at all). The difference is the added
PPPoE header.


Martin