When you set the MTU of a ppp interface with proto=pppoe and ifname=nas0 via the mtu option,
the configured mtu will not be set on the ppp interface (what you want), but on the
underlying interface named by ifname (what you normally don't want to change).
This leeds to log messages like this:
pppd: Interface nas0 has MTU of 1448 -- should be at least 1500.
and MTUs other than what you really want.
desired PPPoE MTU: 1448
actual nas0 MTU: 1448
actual PPPoE MTU: 1440
This issue seems to be related to the commit 7ac29b75319fd69a8a7c0aeea7804d381ec07d3d of netifd.
The text was updated successfully, but these errors were encountered:
After fixing #210 this is working for me (on TP-Link WD8970 with VDSL) as long as I ask nicely for the MTU to be set on the underlying Ethernet interface — in my case "interfaces" as there's a VLAN involved: