Package rtr

Customer routes can be advertised to the network core using static routes, RIP, or BGP. BGP and static routes are the most commonly used routing methods.

Virtual links physically connect separate elements of a backbone, and function as if they are unnumbered point-to-point networks between two routers. A virtual link uses the intra-area routing of its transit area (the non-backbone area that both routers share) to forward packets.