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Configuring Multiprotocol BGP Extensions for IP Multicast
Multiprotocol BGP Configuration Task List
IPC-351
Cisco IOS IP Configuration Guide
Note By default, neighbors that are defined using the neighbor remote-as command in router
configuration mode exchange only unicast address prefixes. To exchange other address prefix types,
such as multicast and VPNv4, neighbors must also be activated using the neighbor activate
command in address family configuration mode, as shown.
See the “Multiprotocol BGP Peer Examples” section for multiprotocol BGP peer configuration
examples.
Configuring a Multiprotocol BGP Peer Group
To configure a peer group to perform multiprotocol BGP routing, use the following commands beginning
in global configuration mode:
Note By default, neighbors that are defined using the neighbor remote-as command in router
configuration mode exchange only unicast address prefixes. To exchange other address prefix types,
such as multicast and VPNv4, neighbors must also be activated using the neighbor activate
command in address family configuration mode, as shown.
Step 3
Router(config-router)# address-family ipv4 multicast
Specifies the IPv4 address family type and places the
router in address family configuration mode.
Step 4
Router(config-router-af)# neighbor {ip-address |
peer-group-name} activate
Enables the neighbor to exchange prefixes for the
specified family type with the local router.
Command Purpose
Command Purpose
Step 1
Router(config)# router bgp autonomous-system
Configures a BGP routing process and places the
router in router configuration mode.
Step 2
Router(config-router)# neighbor peer-group-name
peer-group
Creates a multiprotocol BGP peer group.
Step 3
Router(config-router)# neighbor ip-address remote-as
autonomous-system-number
Adds the IP address of the neighbor in the remote
autonomous system to the multiprotocol BGP
neighbor table of the local router.
Step 4
Router(config-router)# neighbor ip-address peer-group
peer-group-name
Assigns the IP address of a BGP neighbor to a peer
group.
Step 5
Router(config-router)# address-family ipv4 multicast
Specifies the IP Version 4 address family type and
places the router in address family configuration
mode.
Step 6
Router(config-router-af)# neighbor peer-group-name
activate
Enables the peer group to exchange prefixes for the
specified family type with the neighbor and the local
router.
Step 7
Router(config-router-af)# neighbor ip-address
peer-group peer-group-name
Assigns the IP address of a BGP neighbor to a peer
group.