5. From within the address family, configure BGP parameters for the address family.
6. Exit Address Family Configuration mode.
host1:vr1(config-router-af)#exit-address-family
address-family
■ Use to configure the router or VRF to exchange IPv4 or IPv6 addresses by creating
the specified address family.
■ IPv4 and IPv6 addresses can be exchanged in unicast, multicast, or VPN mode.
■ The default setting is to exchange IPv4 addresses in unicast mode from the
default router.
■ Creating an address family for a VRF automatically disables both synchronization
and automatic summarization for that VRF.
■ This command takes effect immediately.
■ Examples
host1:vr1(config-router)#address-family ipv4 multicast
host1:vr1(config-router)#address-family ipv4 unicast
host1:vr1(config-router)#address-family ipv4 unicast vrf vr2
host1:vr1(config-router)#address-family vpn4 unicast
host1:vr1(config-router)#address-family ipv6 unicast
■ Use the no version to disable the exchange of a type of prefix.
■ See address-family.
bgp default ipv4-unicast
■ Use to configure all neighbors to exchange addresses in the IPv4 unicast address
family.
■ All neighbors must be activated with the neighbor activate command in the
IPv4 address family.
■ Example
host1:vr1(config-router)#bgp default ipv4-unicast
■ Affects only neighbors created after you issue the command. To affect existing
neighbors created before you issued the command, you must use the neighbor
activate command in the context of the IPv4 unicast address family.
■ Use the no version to disable the exchange of IPv4 addresses on all neighbors.
■ See bgp default ipv4-unicast.
exit-address-family
■ Use to exit Address Family Configuration mode and access Router Configuration
mode.
■ Example
Configuring BGP Peer Groups ■ 45
Chapter 1: Configuring BGP Routing
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