IPv6 BGP Local Preference

The local preference designates a route to a certain network as the preferred exit route to that network from the AS. The route with a highest local preference is the preferred route. The default value of the local preference is 100, but this can be changed using the set local-preference command.

IPv6 BGP Local Preference Configuration

To configure the local preference of a preferred route in an AS:

On R1:

On R2:

On R3:

On R4:

On R5:

To verify the route, use the show bgp ipv6 unicast command:

On R2:

Before the local preference is configured, R2 has R1 as its next hop for all learned IPv6 addresses. After configuring the local preference on R3 to 500, R2 has a different preferred exit route for prefix BC01:BC1:10:A::/64. R2 can now reach prefix BC01:BC1:10:A::/64 through the exit path of R3, which is now designated as the local preference.