150
[SwitchC-isis-1] quit
5. Configure routing domain authentication mode as MD5 and set the plaintext password to
1020Sec on Switch C and Switch D.
[SwitchC] isis 1
[SwitchC-isis-1] domain-authentication-mode md5 plain 1020Sec
[SwitchC-isis-1] quit
[SwitchD] isis 1
[SwitchD-isis-1] domain-authentication-mode md5 plain 1020Sec
IS-IS GR configuration example
Network requirements
As shown in Figure 41, Switch A, Switch B, and Switch C belong to the same IS-IS routing domain.
Figure 41 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. Configure IS-IS GR:
# 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 IS-IS on Switch A, which enters the restart state and sends connection requests to its
neighbors through the GR mechanism to synchronize the LSDB. To display the IS-IS GR status on Switch
A, use the display isis graceful-restart status command.
# Restart the IS-IS process on Switch A.
<SwitchA> reset isis all 1 graceful-restart
Reset IS-IS process? [Y/N]:y
# Check the GR status of IS-IS on Switch A.
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