When the local routes need to be advertised to the peer, you can implement this configuration to add the specified network segment to the BGP routing table. This configuration is available only when the routes are in the local routing table.
After a BGP device is configured to send a default route to its peer, the BGP device sends a default route with the local address as the next-hop address to a specified peer, regardless of whether there are default routes in the local routing table. This greatly reduces the number of routes on the network.