You can configure a device to use the
default IPv4 route as a valid next hop for a BGP4 route. This configuration is helpful in
certain cases, such as when a device is acting as an edge device.
About this task
By default, a device does not use a default route to resolve a BGP4 next-hop route. If the IPv4 route lookup for the BGP4 next-hop does not result in a valid IGP route (including static or direct routes), the BGP4 next-hop is considered to be unreachable and the BGP4 route is not used. You can configure the device to use the default route as a valid next hop.
Procedure
-
Access global configuration
mode.
device# configure terminal
-
Access BGP configuration mode.
device(config)# router bgp
-
Access address-family IPv4
unicast configuration mode.
device(config-bgp-router)# address-family ipv4 unicast
-
Configure the device to use the
default route as a valid next hop.
device(config-bgp-ipv4u)# next-hop-enable-default
