To enable exchange of IPv6 routes with a neighbor, use the neighbor activate command. The neighbor address must be the same IP address used in the neighbor remote-as command to create the peer.
When IPv6 is enabled or disabled for a neighbor, the adjacency is brought down and restarted to communicate to the change to the peer. You should completely configure IPv6 policy for the peer before activating the peer.
| Default | Exchange of IPv6 routes is disabled by default. |
| Format | neighbor {ipv4-address | ipv6-address [interface interface-name] | autodetect interface interface-name} activate |
| Mode | IPv6 Address Family Config |
| Parameter | Description |
|---|---|
| ipv4-address | The IPv4 address of a peer. |
| ipv6-address | The IPv6 address of a peer. |
| interface | If the neighbor's IPv6 address is a link local address, the local interface must also be specified. |
| autodetect interface | The routing interface on which the neighbor's link local IPv6 address is auto detected. |
Example: The following example enables the exchange of IPv6 routes with the external peer at 172.20.1.2 and sets the next hop for IPv6 routes sent to that peer.
(R1) (Config)# router bgp 1 (R1) (Config-router)# neighbor 172.20.1.2 remote-as 2 (R1) (Config-router)# address-family ipv6 (R1) (Config-router-af)# neighbor 172.20.1.2 activate (R1) (Config-router-af)# neighbor 172.20.1.2 route-map SET-V6-NH out (R1) (Config-router-af)# exit (R1) (Config-router)# exit (R1) (Config)# route-map SET-V6-NH permit 10 (R1) (route-map)# set ipv6 next-hop 2001:1:200::1
