© 2006 Cisco Systems, Inc. All rights reserved. ICND v Determining IP Routes Enabling EIGRP

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Outline Overview EIGRP Features EIGRP and IGRP Comparison EIGRP Configuration EIGRP Configuration Verification EIGRP Configuration Troubleshooting Summary

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Introducing EIGRP EIGRP supports: Rapid convergence Reduced bandwidth usage Multiple network-layer protocols

© 2006 Cisco Systems, Inc. All rights reserved. ICND v EIGRP Terminology

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Comparing EIGRP and IGRP Same metric Same load balancing Improved convergence time (EIGRP) Reduced network overhead (EIGRP)

© 2006 Cisco Systems, Inc. All rights reserved. ICND v 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

© 2006 Cisco Systems, Inc. All rights reserved. ICND v EIGRP Configuration Example

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Verifying the EIGRP Configuration Router# show ip eigrp interfaces Displays information about interfaces configured for EIGRP Router# show ip eigrp interfaces IP EIGRP interfaces for process 109 Xmit Queue Mean Pacing Time Multicast Pending Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes Di0 0 0/0 0 11/ Et0 1 0/ / SE0: /0 10 1/ Tu0 1 0/ / Router# show ip protocols Router# show ip route eigrp Displays current EIGRP entries in the routing table Displays the parameters and current state of the active process

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Verifying the EIGRP Configuration (Cont.) Router# show ip eigrp neighbors Displays the neighbors discovered by IP EIGRP Router# show ip eigrp neighbors IP-EIGRP Neighbors for process 77 Address Interface Holdtime Uptime Q Seq SRTT RTO (secs) (h:m:s) Count Num (ms) (ms) Ethernet1 13 0:00: Ethernet0 14 0:02: Ethernet0 12 0:02: Router# show ip eigrp neighbors detail IP-EIGRP neighbors for process 101 H Address Interface Hold Uptime SRTT RTO Q Seq Tye (sec) (ms) Cnt Num Et0/ :04: Version 12.2/1.2, Retrans:0, Retries:0 Restart time 00:01: Fa0/ :04: S Version 12.2/1.2, Retrans: 0, Retries: Fa0/0 13 1w0d S Version 12.2/1.2, Retrans: 1, Retries: Fa0/0 12 1w0d S Version 12.2/1.2, Retrans: 1, Retries: 0

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Verifying the EIGRP Configuration (Cont.) Router# show ip eigrp topology Displays the IP EIGRP topology table Router# show ip eigrp topology IP-EIGRP Topology Table for process 77 Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - Reply status P , 2 successors, FD is 0 via ( / ), Ethernet0 via ( / ), Ethernet1 via ( / ), Serial0 P , 1 successors, FD is via Connected, Ethernet1 via (307200/281600), Ethernet1 via (307200/281600), Ethernet0 via (332800/307200), Serial0

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Verifying the EIGRP Configuration (Cont.) Router# show ip eigrp traffic Displays the number of IP EIGRP packets sent and received Router# show ip eigrp traffic IP-EIGRP Traffic Statistics for process 77 Hellos sent/received: 218/205 Updates sent/received: 7/23 Queries sent/received: 2/0 Replies sent/received: 0/2 Acks sent/received: 21/14

© 2006 Cisco Systems, Inc. All rights reserved. ICND v debug ip eigrp Command Router# debug ip eigrp IP-EIGRP: Processing incoming UPDATE packet IP-EIGRP: Ext M SM IP-EIGRP: Ext M SM IP-EIGRP: Ext M SM IP-EIGRP: , - do advertise out Ethernet0/1 IP-EIGRP: Ext metric IP-EIGRP: , - do advertise out Ethernet0/1 IP-EIGRP: Ext metric IP-EIGRP: , - do advertise out Ethernet0/1 IP-EIGRP: Ext metric IP-EIGRP: , - do advertise out Ethernet0/1 IP-EIGRP: Ext metric IP-EIGRP: , - do advertise out Ethernet0/1

© 2006 Cisco Systems, Inc. All rights reserved. ICND v Summary EIGRP is an interior gateway protocol that scales well and provides quick convergence times with minimal network traffic. EIGRP is an enhanced version of IGRP developed by Cisco, with improved convergence properties and operating efficiency over IGRP. The router eigrp and network commands can be used to create an EIGRP routing process. The show ip eigrp commands can be used to verify the EIGRP configuration. The debug ip eigrp privileged EXEC command can be used to display information on EIGRP packets.

© 2006 Cisco Systems, Inc. All rights reserved. ICND v