It is a recurring problem that on certain platforms ethernet interfaces will have changed associations: interface name <-> hw-id, after a reboot or upgrade. There has been active discussion regarding the problem recently, and consensus on a preliminary design to resolve the issue. This task will serve as meta-task for investigation and resolution.
A incomplete collection of related tasks:
https://phabricator.vyos.net/T291
https://phabricator.vyos.net/T577
https://phabricator.vyos.net/T1499
https://phabricator.vyos.net/T1671
https://phabricator.vyos.net/T2838