Understanding Redundant Routing Engine Automatic Failover

If the keepalive time is configured for 2 seconds, the sequence of events is as follows:

1. After 2 seconds of keepalive loss, a message is logged.
2. After 2 seconds of keepalive loss, the backup Routing Engine attempts to assume mastership. An alarm is generated whenever the backup Routing Engine is active, and the display is updated with the current status.
3. Once the backup Routing Engine assumes mastership, it continues to function as master even after the originally configured master Routing Engine has successfully resumed operation. You must manually restore it to its previous backup status. However, if at any time one of the Routing Engines is not present, the other Routing Engine becomes master automatically, regardless of how redundancy is configured.