Activate IPv6 Address Family for a BGP Neighbor Using Default VRF

To configure multi-protocol BGP for exchanging IPv6 prefixes over IPv4 BGP Sessions for a BGP neighbor using default VRF, do the following:

Access global configuration mode.
```
 device# configure terminal 
```
Access BGP configuration mode.
```
device(config)# router bgp
```
Specify the autonomous system in which your device resides.
```
device(config-bgp-router)# local-as 1000
```
Specify the autonomous system in which the remote neighbor resides. Assign the remote AS to the neighbor.
```
device(config-bgp-router)# neighbor 192.0.2.10 remote-as 1001
```

Configure the IPv6 address family for the default VRF.

device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)#

Activate the IPv6 Address Family for the BGP neighbor.

device(config-bgp-ipv6u)# neighbor 192.0.2.10 activate

The following is a consolidation of tasks to perform to activate IPv6 address family for a BGP peer using default VRF.

router bgp
local-as 1000
neighbor 192.0.2.10 remote-as 1001 
address-family ipv6 unicast 
neighbor 192.0.2.10 activate