Enabling EIGRP

© 2002, Cisco Systems, Inc. All rights reserved.
© 2002, Cisco Systems, Inc. All rights reserved.
2
Enabling EIGRP
Objectives
Upon completing this lesson, you will be able to:
Describe the features and operation of EIGRP
Use Cisco IOS commands to configure dynamic routing using EIGRP, given a functioning router
Use show and debug commands to identify anomalies in dynamic routing operation using EIGRP, given an operational router
Introducing EIGRP
EIGRP supports:
Rapid convergence
Reduced bandwidth usage
Multiple network-layer protocols
EIGRP Terminology
Comparing EIGRP and IGRP
Similar metric
Same load balancing
Improved convergence time
Reduced network overhead
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
EIGRP Configuration Example
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 active
routing protocol process
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 104960
IP-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 Ethernet0/1
IP-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
Summary
EIGRP is an interior gateway protocol suited for many different topologies and media.
EIGRP is an enhanced version of the IGRP developed by Cisco, with improved convergence properties and operating efficiency over IGRP.
Use the router eigrp and network commands to create an EIGRP routing process.
Use the show ip eigrp commands to display information about your EIGRP configuration.
To display information on EIGRP packets, use the debug ip eigrp privileged EXEC command.