H3C Technologies H3C SR8800 - Manual (Page 201)

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# Enable IS-IS Graceful Restart on Router A and configure the Graceful Restart interval.
system-view
[RouterA] isis 1
[RouterA-isis-1] graceful-restart
[RouterA-isis-1] graceful-restart interval 150
[RouterA-isis-1] return
The configurations for Router B and Router C are similar and are not shown here.
3. Verify the configuration:
After Router A establishes adjacencies with Router B and Router C, they begin to exchange routing
information. Restart IS-IS on Router A, which enters the restart state and sends connection requests
to its neighbors through the Graceful Restart mechanism to synchronize the LSDB. Using the
display isis graceful-restart status command can display the IS-IS GR status on Router A.
# Restart the IS-IS process on Router A.
reset isis all 1
Warning : Reset ISIS process? [Y/N]:y
# Check the IS-IS Graceful Restart state on Router A.
display isis graceful-restart status
Restart information for IS-IS(1)
--------------------------------------------------------------------
IS-IS(1) Level-1 Restart Status
Restart Interval: 150
SA Bit Supported
Total Number of Interfaces = 1
Restart Status: RESTARTING
Number of LSPs Awaited: 3
T3 Timer Status:
Remaining Time: 140
T2 Timer Status:
Remaining Time: 59
IS-IS(1) Level-2 Restart Status
Restart Interval: 150
SA Bit Supported
Total Number of Interfaces = 1
Restart Status: RESTARTING
Number of LSPs Awaited: 3
T3 Timer Status:
Remaining Time: 140
T2 Timer Status:
Remaining Time: 59
IS-IS FRR configuration example
Network requirements
Router S, Router A, and Router D belong to the same IS-IS routing domain as illustrated in Figure 68 .
Configure IS-IS FRR so that when the link between Router S and Router D fails, traffic can be switched to
Link B immediately.