MTU settings are defaulted 1500 when interface is ifdowned.
This has the effect of changing the MTU on the interface and any subinterfaces to
1500. And if these subinterfaces are in a bridge, the bridge will pick the MIN MTU
so the bridge keeps this MTU even after the interface is brought back up. The sub
interface does not change to a higher value then 1500 (kernel VLAN driver only
moves the MTU is the decreasing direction.
(cherry picked from commit 70e67ab15efb13e1499288152d801b39f28a190b)
(cherry picked from commit 56238543a980e983957a180c583b9412c3ab48ab)
Corrected a minor error in how we handle unsupported config attributes.
Instead of
error: not enough arguments for format string
we will now print this:
warning: peerlink.4000: unsupported attribute 'clagd-foobar'
(cherry picked from commit 44c6004a33d59ee234f8ee3d5f450e158c9e5bdc)
(cherry picked from commit f2c2321301d05e88d3c9ab9c26e6d4e256c884e9)
