GRES: MAC address Persistence after a Routing Engine switchover

If you configure multiple aggregated Ethernet interfaces, the MAC addresses of the aggregated Ethernet interfaces are saved on a file that is stored on the primary Routing Engine and is synchronized with the backup Routing Engine. The file is updated after each successful commit that required changes to the MAC addresses table. In earlier releases, if you configure multiple aggregated Ethernet interfaces, the MAC address of the aggregated Ethernet interfaces displayed in the show interfaces ae number command output might get reordered after a Routing Engine switchover or restart.