This command enters address family mode and configures Address Family Indicator (AFI) and Subsequent Address Family Indicator (SAFI) modes for BGP peers.
| ipv4 | (Optional) Specifies that the AFI mode is configured for IPv4 for this address family (default). |
| ipv6 | (Optional) Specifies that the AFI mode is configured for IPv6 for this address family. |
| unicast | multicast | (Optional) Specifies that the SAFI mode is configured for either unicast or multicast for this address family. The default value is unicast. |
| both | Configures the SAFI mode for both unicast and multicast. |
| bgp-mpls-vpn | Configures the SAFI mode for BGP-MPLS-VPN. |
If no option is specified, the AFI mode is IPv4 unicast.
BGP Router Configuration.
By default BGP peers are enabled for carrying ipv4 unicast routes. For all other AFI/SAFI‘s a given peer must be “activated” for carrying routes of that type.
Use this command to enter the address family configuration mode for IPv4 unicast, IPv6 unicast, IPv4 multicast, or IPv6 multicast. Within the appropriate mode:
Before configuring an IPv4 or IPv6 multicast address family, a multicast toplogy for that address family must be configured in the global configuration address family using topology. Enter the IPv4 or IPv6 multicast address family in global configuration mode using bgp address-family, and configure the address family context with a topology before attempting to configure a BGP IPv4 or IPv6 multicast address family.
To disable a peer from carrying ipv4/unicast routes a BGP route-map is required.
The no address-family removes the configuration for the specified address family context.
The following example enters the address family configuration mode for AFI/SAFI mode IPv6 unicast:
System(su-config-bgp)->address-family ipv6 unicast System(su-config-bgp-af)->
The following example removes all address-family configuration for IPv6 unicast:
System(su-config-bgp)->no address-family ipv6 unicast System(su-config-bgp)->
The following example configures an IPv4 multicast address family topology named MultiIPv4 and enters the IPv4 BGP multicast address family configuration mode:
System(su-config)->address-family ipv4 multicast System(su-config-af)->topology MultiIPv4 System(su-config-af)->exit System(su-config)->router bgp 1 System(su-config-bgp)->address-family ipv4 multicast System(su-config-bgp-af)->
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