Enhanced Interior Gateway Routing Protocol
Enhanced Interior Gateway Routing Protocol (EIGRP) is an interior gateway protocol suited for many diffrent topologies and media. In a well designed network, EIGRP scales well and provides extremely quick convergence times with minimal network traffic.
EIGRP Theory of Operation
Some of the many advantages of EIGRP are:
. Very low usage of network resources during normal operation only hello packets are transmitted on a stable network.
. When a change occurs, only routing table changes are propagated, not the entire routing table;this reduces the load the routing protocol itself places on the network.
. Rapid convergence times for changes in the network topology (in some situations convergence can be almost instantaneous).
. EIGRP is an enhanced distance vector protocol, relying on the Diffused Update Algorithm (DUAL) to calculate the shortest path to a destination within a network.
