[sub intf] Inherit parent port mtu changes#1479

Merged

lguohan merged 3 commits intosonic-net:masterfrom

wendani:sub_intf_mtu

Nov 1, 2020

Commits on Sep 29, 2020

Restore eth0 up in post-test clean up
wendani
committed

Commits on Oct 22, 2020

Merge remote-tracking branch 'origin/master'
wendani
committed

Commits on Oct 24, 2020

Sub interface inherits parent port mtu changes
wendani
committed