IGRP Routing: Optional Commands

Router(config)#no router igrp as-number	Disables the IGRP routing process
Router(config-router)#no network w.x.y.z	Removes network w.x.y.z from the IGRP routing process
Router(config-if)#bandwidth x	Sets the bandwidth of this interface to x kilobits to allow IGRP to make a better routing decision
Router(config-router)#variance x	Allows IGRP to accept unequal-cost routes

Tip:

The bandwidth command is used for metric calculations only. It does not change interface performance.