Fundamentals and Operation
Enhanced IGRP is an interior gateway routing protocol designed for various networks and media. Enhanced IGRP is an advanced distance-vector protocol. The underlying concepts are the same as those of distance-vector protocols, except that Enhanced IGRP is a non-periodic incremental protocol. This differs from traditional distance-vector protocols, in which complete routing updates are sent periodically, using unnecessary bandwidth and CPU resources.
Improvements to Enhanced IGRP have achieved faster convergence as well, which is reliant upon Diffused Update Algorithm (DUAL) to achieve rapid, loop-free convergence. DUAL, in turn, enables synchronization of all devices involved in a topology change. Systems that ...
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