The default ipv4-unicast command enables the IPv4 unicast address family for all peers.
The undo default ipv4-unicast command disables the IPv4 unicast address family for all peers.
By default, the IPv4 unicast address family is enabled.
Usage Scenario
If the IPv4 unicast address family needs to be enabled by default for created BGP peers, run the default ipv4-unicast command to set the default address family of BGP to the IPv4 unicast address family.
If the IPv4 unicast address family does not need to be enabled by default for created BGP peers, run the undo default ipv4-unicast command to disable the IPv4 unicast address family for all peers.Configuration Impact
After the default ipv4-unicast command is run, the IPv4 unicast address family is enabled by default for created BGP peers.
Precautions
After you run the undo default ipv4-unicast command, run the peer enable command if the created BGP peer needs to be enabled with the IPv4 unicast address family.