168
[SwitchD] isis 1
[SwitchD-isis-1] domain-authentication-mode md5 plain 1020Sec
IS-IS GR configuration example
Network requirements
As shown in Figure 44, Switch A, Switch B, and Switch C belong to the same IS-IS routing domain.
Figure 44 Network diagram
Configuration procedure
1. Configure IP addresses and subnet masks for interfaces. (Details not shown.)
2. Configure IS-IS on the switches to make sure 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. (Details not shown.)
3. Enable IS-IS GR on Switch A.
<SwitchA> system-view
[SwitchA] isis 1
[SwitchA-isis-1] graceful-restart
[SwitchA-isis-1] return
Verifying the configuration
After Switch A establishes adjacencies with Switch B and Switch C, they begin to exchange routing
information.
# Restart the IS-IS process on Switch A.
<SwitchA> reset isis all 1 graceful-restart
Reset IS-IS process? [Y/N]:y
Switch A enters the restart state and sends connection requests to its neighbors through the GR
mechanism to synchronize the LSDB.
# Check the GR status of IS-IS on Switch A.
<SwitchA> display isis graceful-restart status
Restart information for IS-IS(1)
--------------------------------
Restart status: COMPLETE
Restart phase: Finish
Restart t1: 3, count 10; Restart t2: 60; Restart t3: 300
SA Bit: supported
Level-1 restart information
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