To configure multi-protocol BGP for exchanging IPv6 prefixes over IPv4 BGP
Sessions for a BGP peer group using user defined VRF, do the following:
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Access global configuration mode.
device# configure terminal
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Access BGP configuration mode.
device(config)# router bgp
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Specify the autonomous system in which your device resides.
device(config-bgp-router)# local-as 1000
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Navigate into the Peer Group context.
device(config-bgp-router)# neighbor pgMain peer-group
%Warning: Please activate Peer-group for IPv6 address-family
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Specify the autonomous system in which the remote peer-group resides. Assign the remote AS
to the peer-group.
device(config-bgp-router)# neighbor pgMain remote-as 1001
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Navigate to the IPv4 Unicast Address Family context of the user defined VRF.
device(config-bgp-router)# address-family ipv4 unicast vrf red
device(config-bgp-ipv4u-vrf)#
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Assign the BGP neighbor to the Peer Group.
device(config-bgp-ipv4u-vrf)# neighbor 192.0.2.10 peer-group pgMain
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Exit out of the IPv4 Address Family context.
device(config-bgp-ipv4u-vrf)# exit
device(config-bgp-router)#
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Navigate to the IPv6 Unicast Address Family context of the user defined VRF. This enables
IPv6 address family for the VRF.
device(config-bgp-router)# address-family ipv6 unicast vrf red
device(config-bgp-ipv6u-vrf)#
-
Exit out of the IPv6 Address Family context.
device(config-bgp-ipv6u-vrf)# exit
device(config-bgp-router)#
-
Configure the IPv6 address family.
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)#
-
Activate the IPv6 Address Family for the peer group.
device(config-bgp-ipv6u)# neighbor pgMain activate
Example
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 pgMain peer-group
neighbor pgMain remote-as 1001
address-family ipv4 unicast vrf red
neighbor 192.0.2.10 peer-group pgMain
address-family ipv6 unicast vrf red
address-family ipv6 unicast
neighbor pgMain activate
