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Determining IP Routes

Enabling EIGRP

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Outline

Overview

EIGRP Features

EIGRP and IGRP Comparison

EIGRP Configuration

EIGRP Configuration Verification

EIGRP Configuration Troubleshooting

Summary

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Introducing EIGRP

EIGRP supports: Rapid convergence

Reduced bandwidth usage

Multiple network layer protocols

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EIGRP Terminology

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Comparing EIGRP and IGRP

Same metric

Same load balancing

Improved convergence time (EIGRP)

Reduced network overhead (EIGRP)

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Configuring EIGRP

Router(config-router)#network network-number Selects participating attached networks

Router(config)#router eigrp autonomous-system Defines EIGRP as the IP routing protocol

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EIGRP Configuration Example

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Verifying the EIGRP Configuration

Router#show ip protocols

Router#show ip route eigrp

Router#show ip eigrp traffic

Router#show ip eigrp neighbors

Router#show ip eigrp topology

Displays the neighbors discovered by IP EIGRP

Displays the IP EIGRP topology table

Displays the number of IP EIGRP packets sent and received

Displays current EIGRP entries in the routing table

Displays the parameters and current state of the activerouting protocol process

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debug ip eigrp Command

Router#debug ip eigrp

IP-EIGRP: Processing incoming UPDATE packet

IP-EIGRP: Ext 192.168.3.0 255.255.255.0 M 386560 - 256000 130560 SM 360960

- 256000 104960

IP-EIGRP: Ext 192.168.0.0 255.255.255.0 M 386560 - 256000 130560 SM 360960

- 256000 104960IP-EIGRP: Ext 192.168.3.0 255.255.255.0 M 386560 - 256000 130560 SM 360960

- 256000 104960

IP-EIGRP: 172.69.43.0 255.255.255.0, - do advertise out Ethernet0/1

IP-EIGRP: Ext 172.69.43.0 255.255.255.0 metric 371200 - 256000 115200

IP-EIGRP: 192.135.246.0 255.255.255.0, - do advertise out Ethernet0/1

IP-EIGRP: Ext 192.135.246.0 255.255.255.0 metric 46310656 - 45714176 596480

IP-EIGRP: 172.69.40.0 255.255.255.0, - do advertise out Ethernet0/1IP-EIGRP: Ext 172.69.40.0 255.255.255.0 metric 2272256 - 1657856 614400

IP-EIGRP: 192.135.245.0 255.255.255.0, - do advertise out Ethernet0/1

IP-EIGRP: Ext 192.135.245.0 255.255.255.0 metric 40622080 - 40000000 622080

IP-EIGRP: 192.135.244.0 255.255.255.0, - do advertise out Ethernet0/1

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Summary

EIGRP is an interior gateway protocol that scales well andprovides quick convergence times with minimal networktraffic.

EIGRP is an enhanced version of IGRP developed by

Cisco, with improved convergence properties andoperating efficiency over IGRP.

The router eigrp and network commands can be used tocreate an EIGRP routing process.

The show ip eigrp commands can be used to verify theEIGRP configuration.

The debug ip eigrp privileged EXEC command can be usedto display information on EIGRP packets.

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