Enabling NSR for ISIS-SPB
![[IMPORTANT: ]](images/important.png) | IMPORTANT: Graceful Restart and IS-IS NSR are mutually exclusive. You cannot use both features on the device. | |
To use NSR for ISIS-SPB, an IRF fabric must have a minimum of two member devices.
NSR ensures nonstop services when ISIS-SPB has redundant processes on multiple IRF member devices. In contrast to Graceful Restart, NSR does not require a neighbor device to recover routing information.
NSR backs up SPBM link state information from the active ISIS-SPB process to the standby ISIS-SPB process. The standby ISIS-SPB process takes over when any of the following events occurs:
The active ISIS-SPB process restarts.
The IRF master fails.
An ISSU starts on the IRF master.
To enable NSR for ISIS-SPB:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter SPBM view. | spbm | N/A |
3. Enable NSR for ISIS-SPB. | non-stop-routing | By default, NSR is disabled for ISIS-SPB. |