Lab 23: Default Routing, Route manipulation, and Filtering in EIGRP Networks-Part I

Tuning EIGRP Updates

Like IGRP, EIGRP has several parameters for tuning timers, controlling broadcasts, load sharing, and controlling routes. The following is a list of parameters adjustable for EIGRP:

• Router(config-if) ip hello-interval eigrp as_number interval_in_seconds ” Use this interface command to change the hello timer for EIGRP. The default value of this command is interface-dependant. By default, hello packets are sent every 5 seconds. The exception to this is low-speed, nonbroadcast multiaccess media (NBMA), where it is 60 seconds. Low-speed is defined as rates of T1 (1.544 Mbps) or slower. All neighbors residing on a network should have equal hello timers.

• Router(config-if) ip hold-time eigrp as_number holdown_timer_in_seconds ” Use this command to change the EIGRP hold timer for routes received by this interface. The timer has a default vault of 180 seconds for low-speed NBMA networks and 15 seconds for all other networks. All neighbors residing on a network should have an equal hold timer.