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Configuring a Preference Value for IPv6 IS-IS
Context
If multiple routes to the same destination are discovered by different routing protocols running on the same device, the route discovered by the protocol with the highest preference is selected.
To prefer an IPv6 route discovered by IS-IS, configure a higher preference value for IPv6 IS-IS route. In addition, a routing policy can be configured to increase the preferences of specified IPv6 IS-IS routes, without affecting route selection.
Procedure
- Run system-view
The system view is displayed.
- Run isis [ process-id ]
The IS-IS view is displayed.
- Run ipv6 preference { route-policy route-policy-name | preference }*
The IPv6 IS-IS route preference value is configured.
The default IPv6 IS-IS route preference value is 15. A smaller preference value indicates a higher preference.
- Run commit
The configuration is committed.