Use this command to configure the number of seconds that the restarting router asks its neighbors to wait before exiting helper mode. This is referred to as the grace period. The restarting router includes the grace period in its grace LSAs. For planned restarts (using the initiate failover command), the grace LSAs are sent prior to restarting the management unit, whereas for unplanned restarts, they are sent after reboot begins.
The grace period must be set long enough to allow the restarting router to reestablish all of its adjacencies and complete a full database exchange with each of those neighbors.
| Default | 120 seconds |
| Format | nsf [ietf] restart-interval 1-1800 |
| Mode | OSPF Router Configuration |
| Parameter | Description |
|---|---|
| ietf | This keyword is accepted but not required. |
| seconds | The number of seconds that the restarting router asks its neighbors to wait before exiting helper mode. The range is from 1 to 1800 seconds. |
