362 CHAPTER 29: IS-IS CONFIGURATION
Configuration procedure
1 Configure IP addresses of the interfaces on each switch and configure IS-IS.
Follow Figure 114 to configure the IP address and subnet mask of each interface.
The configuration procedure is omitted.
Configure IS-IS on the switches, ensuring that Switch A, Switch B and Switch C
can communicate with each other at layer 3 and dynamic route update can be
implemented among them with IS-IS. The configuration procedure is omitted here.
2 Configure IS-IS Graceful Restart.
# Enable IS-IS Graceful Restart on Switch A and configure the Graceful Restart
Interval.
<SwitchA> system-view
[SwitchA] isis 1
[SwitchA-isis-1] graceful-restart
[SwitchA-isis-1] graceful-restart interval 150
[SwitchA-isis-1] return
Configurations for Switch B and Switch C are similar and therefore are omitted
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 into 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 Switch A.
<SwitchA> reset isis all 1
Warning : Reset ISIS process? [Y/N]:y
# Check the Graceful Restart status of IS-IS on Switch A.
<SwitchA> display isis graceful-restart status
Restart information for ISIS(1)
-------------------------------
IS-IS(1) Level-1 Restart Status
Restart Interval: 150
SA Bit Supported
Total Number of Interfaces = 1
Restart Status: RESTARTING
T3 Timer Status:
Remaining Time: 65535
T2 Timer Status:
Remaining Time: 59
Interface Vlan1
T1 Timer Status:
Remaining Time: 1
RA Not Received
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