Interior Gateway Routing Protocol (IGRP)

by **Admin** Sun Dec 16, 2007 7:19 am

Interior Gateway Routing Protocol (IGRP)
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IGRP is an interior gateway protocol

invented by cisco to replace the RIP.

It is a distance-vector routing protocol

used by routers to exchange routing data

within an autonomous system.

Important points
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1. IGRP supports multiple metrics for each

route, including bandwidth, delay, load,

MTU, and reliability

2.The maximum hop count of IGRP-routed

packets is 255 (default 100).

disadvantage
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1. IGRP is considered a classful routing

protocol.

Note: Classful routing protocols can not support variable length subnets.