1. EIGRP Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco-proprietary routing protocol for TCP/IP. It's actually based on Cisco's proprietary IGRP routing protocol, with many enhancements built into it. EIGRP has many link state characteristics that were added to it to allow for greater scalability in enterprise networks.

2. EIGRP metrics Bandwidth Load Delay Reliability MTU Hop Count Mfawa Alfred Onen - 2013

3. Successor A successor for a particular destination is a next hop router that satisfies these two conditions: 1.It provides the least distance to that destination 2.It is guaranteed not to be a part of a routing loop Mfawa Alfred Onen - 2013

4. Feasible Successor A feasible successor provides a working route to the same destination, although with a higher distance. A feasible successor for a particular destination is a next hop router that satisfies this condition: 1.It is guaranteed not to be a part of a routing loop Mfawa Alfred Onen - 2013

5. Active and Passive State A destination in the topology table can be marked either as Passive or Active. A Passive state is a state when the router has identified the successor(s) for the destination. Active state is a state where the current successor no longer satisfies the Feasibility Condition and there are no feasible successors identified for that destination (i.e. no backup routes are available). Mfawa Alfred Onen - 2013

6. Features of EIGRP EIGRP supports Classless Inter-Domain Routing (CIDR) EIGRP is not usable in applications where routers need to know the exact network topology EIGRP can run separate routing processes for Internet Protocol (IP), IPv6 etc Mfawa Alfred Onen - 2013

7. Useful OSPF Commands (Cisco IOS) CommandsDescriptions Router(config)#router eigrp 1 Turns on the EIGRP process. 1 is the autonomous system number, which can be a number between 1 and 65,535. Note:- All routers in the same autonomous system must use the same autonomous system number. Router(config-router)#network 10.0.0.0Specifies which network to advertise in EIGRP. Router(config-if)#bandwidth x Sets the bandwidth of this interface to x kilobits to allow EIGRP to make a better metric calculation TIP: The bandwidth command is used for metric calculations only. It does not change interface performance. Router(config-router)#no network 10.0.0.0Removes the network from the EIGRP process. Router(config)#no router eigrp 1Disables routing process 1 Router(config-router)#auto-summaryEnables auto-summarization for the EIGRP process. Router(config-router)#no autosummaryTurns off the auto-summarization feature. Router(config-router)#variance n include routes with a metric less than or equal to n times the minimum metric route for that destination, where n is the number specified by the variance command NOTE: If a path is not a feasible successor, it is not used in load balancing. EIGRP supports up to six unequal-cost paths. Mfawa Alfred Onen - 2013

8. Useful OSPF Commands (Cisco IOS) CONTD. CommandsDescriptions Router(config)#interface serial 0/0Enters interface configuration mode. Router(config-if)#bandwidth 256 Sets the bandwidth of this interface to 256 kilobits to allow EIGRP to make a better metric calculation. Router#show ip eigrp neighborsDisplays the neighbor table. Router#show ip eigrp neighbors detailDisplays a detailed neighbor table. Router#show ip eigrp interfacesShows information for each interface Router#show ip eigrp interfaces serial 0/0Shows information for a specific interface Router#show ip eigrp interfaces 1Shows information for interfaces running process 1. Router#show ip eigrp topologyDisplays the topology table Router#show ip eigrp traffic Shows the number and type of packets sent and received Mfawa Alfred Onen - 2013

9. Hands On Lab – Setup EIGRP on All R1,2 and 3 Mfawa Alfred Onen - 2013

10. Further Reading 1.http://computernetworkingnotes.com/routing-static-dynamics-rip- ospf-igrp-eigrp/eigrp-routing-configurations.htmlhttp://computernetworkingnotes.com/routing-static-dynamics-rip- ospf-igrp-eigrp/eigrp-routing-configurations.html 2.http://cs-study.blogspot.com/2012/10/eigrp-on-packet-tracer.htmlhttp://cs-study.blogspot.com/2012/10/eigrp-on-packet-tracer.html 3.http://en.wikipedia.org/wiki/Enhanced_Interior_Gateway_Routing_ Protocolhttp://en.wikipedia.org/wiki/Enhanced_Interior_Gateway_Routing_ Protocol Mfawa Alfred Onen - 2013

11. Questions? Mfawa Alfred Onen - 2013