Lesson-13, Configuring EIGRP on cisco Routers

Hello guys in this post we will learn how to configure Eigrp Routing Protocol on the Cisco Routers

First we should know the features that Eigrp Support .

Features of Eigrp Routing protocol :

• Automatic redistribution of routes between IGRP and EIGRP.
• Ability to turn off and on EIGRP and IGRP on individual interfaces of the router.
• Fast network convergence thanks to EIGRP's DUAL algorithm (convergence is when all routers know about all the networks that every other router is offering).
• Incremental Updates that save network bandwidth and speed convergence.
• Reduced router CPU load, as compared to IGRP.
• EIGRP uses neighbor discovery to find and keep track of neighboring routers. Neighbor discovery uses multicast IP and is not tied to whether or not the the IP network is properly configured.
• EIGRP prevents routing loops on the network
• Supports variable length subnet masks (VLSM)
• Automatic Route Summarization

Router(config)#router eigrp 100	Turns on the EIGRP process 100 is the autonomous system (AS) number, which can be a number between 1 and 65535 All routers in the same AS must use the same AS number
Router(config-router)#network 10.0.0.0	Specifies which network to advertise in EIGRP
Router(config-router)#eigrp log-neighbor-changes	Logs any changes to an EIGRP neighbor adjacency
Router(config-router)#no network 10.0.0.0	Removes the network from the EIGRP process
Router(config)#no eigrp 100	Disables routing process 100
Router(config-if)#bandwidth x	Sets the bandwidth of this interface to x kilobits to allow EIGRP to make a better routing decision
Auto summarization in Eigrp
Router(config-router)#no auto-summary	Turns off the auto-summarization feature. Networks are summarized at the classful boundary by default
Router(config)#int fa 0/0
Router(config-if)ip summary-address eigrp 100 10.10.0.0 255.255.0.0	Enables manual summarization on this specific interface for the given address and mask
Verifying Eigrp
Router#show ip eigrp neighbors	Displays a neighbor table
Router#show ip eigrp neighbors detail	Displays a detailed neighbor table
Router#show ip eigrp interfaces	Displays information for each interface
Router#show ip eigrp int s 0/0	Displays information for a specific interface
Router#show ip eigrp int 100	Displays information for interfaces running process 100
Router#show ip eigrp topology	Displays the topology table. This command will show you where your feasible successors are
Router#show ip eigrp traffic	Displays the number and type of packets sent and received
Troubleshooting Eigrp
Router#debug eigrp fsm	Displays events/actions related to the DUAL FSM
Router#debug eigrp packet Router#debug eigrp neighbor	Displays events/actions related to EIGRP packets Displays events/actions related to EIGRP neighbors

Download Eigrp Configuration Activity for Practice :

 Eigrp.pka