Transmission and storage of routing path information and routing topology information using a single routing protocol

摘要

Methods, systems, and devices are described for transmitting and storing routing path information and routing topology information using a single protocol. In particular embodiments, routing path information for an exterior gateway protocol (“EGP”) network such as a border gateway protocol (“BGP”) network is transmitted throughout an interior gateway protocol (“IGP”) network using IGP messages such as open-shortest-path-first (“OSPF”) or intermediate state to intermediates state (“IS-IS”) messages. The IGP networks may transmit and store the BGP information using type length values (TLVs). As a result, network areas running an IGP may maintain BGP information throughout the network area without the overhead of an iBGP mesh and related message-passing.