Cisco Systems 78-11741-02 manual Eigrp Configuration Task List, Enabling Eigrp, IPC-259

Configuring EIGRP

EIGRP Configuration Task List

convergence time. Recomputation is processor-intensive; it is advantageous to avoid unneeded recomputation. When a topology change occurs, DUAL will test for feasible successors. If there are feasible successors, it will use any it finds in order to avoid unnecessary recomputation.

The protocol-dependent modules are responsible for network layer protocol-specific tasks. An example is the EIGRP module, which is responsible for sending and receiving EIGRP packets that are encapsulated in IP. It is also responsible for parsing EIGRP packets and informing DUAL of the new information received. EIGRP asks DUAL to make routing decisions, but the results are stored in the IP routing table. Also, EIGRP is responsible for redistributing routes learned by other IP routing protocols.

EIGRP Configuration Task List

To configure EIGRP, perform the tasks described in the following sections. The tasks in the first section are required; the tasks in the remaining sections are optional:

•Enabling EIGRP (Required)

•Making the Transition from IGRP to EIGRP (Optional)

•Logging EIGRP Neighbor Adjacency Changes (Optional)

•Configuring the Percentage of Link Bandwidth Used (Optional)

•Adjusting the EIGRP Metric Weights (Optional)

•Applying Offsets to Routing Metrics (Optional)

•Disabling Route Summarization (Optional)

•Configuring Summary Aggregate Addresses (Optional)

•Configuring Floating Summary Routes (Optional)

•Configuring EIGRP Route Authentication (Optional)

•Configuring EIGRP Protocol-Independent Parameters (Optional)

•Configuring EIGRP Stub Routing (Optional)

•Monitoring and Maintaining EIGRP(Optional)

See the section “EIGRP Configuration Examples” at the end of this chapter for configuration examples.

Enabling EIGRP

To create an EIGRP routing process, use the following commands beginning in global configuration mode:

	Command	Purpose
Step 1
	Router(config)# router eigrp autonomous-system	Enables an EIGRP routing process in global
		configuration mode.
Step 2
	Router(config-router)# network network-number	Associates networks with an EIGRP routing process
		in router configuration mode.

EIGRP sends updates to the interfaces in the specified networks. If you do not specify the network of an interface, the interface will not be advertised in any EIGRP update.

Cisco IOS IP Configuration Guide

IPC-259