Advertising the default BGP4+ route
A BGP device can be configured to advertise the default IPv6 route to all BGP4+ neighbors and to install that route in the local BGP4+ route table.
The default route must be present in the local IPv6 route table.
The following example enables a BGP4+ device to advertise the default IPv6 route to all BGP4+ neighbors and to install that route in the local BGP4+ route table.
device# configure terminal device(config)# router bgp device(config-bgp-router)# address-family ipv6 unicast device(config-bgp-ipv6u)# default-information-originate