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 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.
The system view is displayed.
The IS-IS view is displayed.
An 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.