ip-address— Neighbor's IP address.
peer-group-name— Name of the peer group. See section 8-19.
Purpose: Every router should have a default route that is used to forward packets to networks that are not in the local IP routing table. One method for ensuring that every router has a default route is to configure a static route on every router to establish the default route. Another method is to create one default route and advertise this route to the BGP neighbors. The router owning the default route can advertise it through BGP using the default-originate form of the neighbor command. Using this form is not recommended, because the router always advertises the default ...