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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 22 Configuring IP Unicast Routing
Configuring EIGRP
To create an EIGRP routing process, you must enable EIGRP and associate networks. EIGRP sends
updates to the interfaces in the specified networks. If you do not specify an interface network, it is not
advertised in any EIGRP update.
Note If you have routers on your network that are configured for IGRP, and you want to change to EIGRP,
you must designate transition routers that have both IGRP and EIGRP configured. In these cases,
perform Steps 1 through 3 in the next section and also see the “Configuring IGRP” section on
page 22-30. You must use the same autonomous system number for routes to be automatically
redistributed.
EIGRP Router Mode Commands
Beginning in privileged EXEC mode, follow these steps to configure EIGRP. Configuring the routing
process is required; other steps are optional:
Network None specified.
Offset-list Disabled.
Router EIGRP Disabled.
Set metric No metric set in the route map.
Traffic-share Distributed proportionately to the ratios of the metrics.
Variance 1 (equal-cost load balancing).
Table 22-9 Default EIGRP Configuration (continued)
Feature Default Setting
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
router eigrp autonomous-system Enable an EIGRP routing process, and enter router configuration
mode. The autonomous system number identifies the routes to
other EIGRP routers and is used to tag routing information.
Step 3
network network-number Associate networks with an EIGRP routing process. EIGRP sends
updates to the interfaces in the specified networks. If an interface’s
network is not specified, it is not advertised in any IGRP or
EIGRP update.
Step 4
eigrp log-neighbor-changes (Optional) Enable logging of EIGRP neighbor changes to monitor
routing system stability.
Step 5
metric weights tos k1 k2 k3 k4 k5 (Optional) Adjust the EIGRP metric. Although the defaults have
been carefully determined to provide excellent operation in most
networks, you can adjust them.
Caution Determining metrics is complex and is not
recommended without guidance from an experienced
network designer.
