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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 a IPv6 route discovered by IS-IS, configure a higher preference value for IS-IS IPv6 route. In addition, a routing policy can be configured to increase the preferences of specified IS-IS IPv6 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 IS-IS IPv6 route preference value is configured.
The default IS-IS IPv6 route preference value is 15. A smaller preference value indicates a higher preference.
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