CSE 80N Lecture Notes - Lecture 20: Hierarchical Routing, Interior Gateway Routing Protocol, Border Gateway Protocol
Document Summary
Will try to get project details ready to tell us. When looking for forwarding table entry for specific destination address, use longest . Same as aggregate address table but instead of the range, only one binary number. Can"t store all destination in routing tables. Want to control policies going through autonomous systems. Routers in different as can run different intra-as routing. Edge routers that talk to other routers. Flood network with link cost to neighbors. Owned and operated by single administrative authority. Free to choose internal architecture and routing protocols (igp) Policy base: as may decide to avoid routing packets through competitor"s network. Don"t advertise/announce path that doesn"t benefit you (users don"t know) Routers at edge if as exchange with other edges of other ass. As2 might use different igp than as1. Distance vector routing protocol using bellman ford (exchanges distances) Hop count is used as metric from path selection.
