Configuring Graceful Restart For Isis-Spb; Configuring Nsr For Isis-Spb - HP 5920 series Configuration Manual

Configuring Graceful Restart for ISIS-SPB

IMPORTANT:
Graceful Restart and NSR are mutually exclusive. You cannot use them at the same time.
Enable this feature before you re-enable SPBM or perform an active/standby switchover. Graceful Restart
ensures nonstop forwarding while ISIS-SPB processes are re-establishing their adjacency.
To configure Graceful Restart for ISIS-SPB:
Step
1. Enter system view.
2. Enter SPBM view.
3. Enable Graceful Restart for
ISIS-SPB.
4. (Optional.) Set the SA bit
in ISIS-SPB hello PDUs.
5. (Optional.) Set the T2
timer.

Configuring NSR for ISIS-SPB

IMPORTANT:
Graceful Restart and NSR are mutually exclusive. You cannot use them at the same time.
NSR is available in Release 231 1P04 and later versions.
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 occur:
The active ISIS-SPB process restarts.
•
A master/subordinate switchover occurs.
•
• An ISSU starts on the master device.
Command
system-view
spbm
graceful-restart
graceful-restart suppress-sa
graceful-restart t2 t2-value
23
Remarks
N/A
N/A
By default, ISIS-SPB Graceful Restart is
disabled.
By default, the Suppress-Advertisement
(SA) bit is not set.
If the SA bit is set, the ISIS-SPB neighbors
will continue to advertise the adjacency
with the device while the device is
restarting.
The default T2 timer for ISIS-SPB Graceful
Restart is 300 seconds.
This timer sets the maximum adjacency
hold time. If the restarting ISIS-SPB process
fails to complete restarting before this
timer expires, the peer ISIS-SPB process
removes the adjacency with the restarting
ISIS-SPB.