To facilitate entering of the router in the Address-family Router Configuration Mode and to enable configuration of the session that carries standard vpnv4 address prefixes and enters into VPN Address Family Configuration Mode, use the command address-family in BGP Router Configuration Mode. Routing information is advertised for IPv4 address family when a BGP session is configured, unless the default advertising is reset. The no form of the command deletes the peers belonging to the IPv4, IPv6 and VPNv4 address family.
| Parameter | Type | Description |
|---|---|---|
ipv4
|
Enter to configure a session that carries standard IPv4 address prefixes. | |
ipv6
|
Enter to configure a session that carries standard IPv6 address prefixes. | |
l2vpn
|
Enter to configure a session that carries L2VPN VPLS address prefixes. | |
vpnv4
|
Enter to enable configuration of the session that carries standard vpnv4 address prefixes and enters into VPN Address Family Configuration Mode. |
BGP Router Configuration Mode
BGP4 VPN allows the Service Providers to use their IP backbone to provide VPN services to their customers. BGP is used to distribute VPN routing information across the provider’s backbone and MPLS is used to forward VPN traffic from one VPN site to another.
iS5Comm (config-router)# address-family ipv4
iS5Comm(config-router-af4)#
iS5Comm (config-router)# address-family vpnv4
iS5Comm(config-router-afvpnv4)#