Eigrp applies an administrative distance of 90 for. Basics of routing static routingdynamic routing classification of dynamic routing administrative distance and metric link state routing and distance slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Eigrp will form neighbor relationships with adjacent routers in the. In order to become eigrp neighbors this number must be same on all participates. When you start preparing for ccna exam, you start developing concepts on various networking topics, but in the real world when you will work as a network engineer or in any other relevant position, you will need to know when and how to apply your. Updates are sent when a change occurs, and include only the change.
It is a cisco proprietary protocol, so all routers in a. Eigrp routers do not send periodic, fulltable routing updates. Eigrp uses diffusing update algorithm dual to determine the best path among all feasible paths. Eigrp is commonly the routing protocol of choice when using an all cisco network with no requirement for crossvendor operation. A feasible successor is a backup route, which is not stored in the routing table but stored in the topology table.
Lab 102 configuring mutual ospf and rip redistribution, then you should have a basic understanding of mutual route redistribution. Ccna lab manual router infotech, confidential document only for internal circulation page 3 procedure. Download ccna routing and switching portable command guide, 4th edition pdf ebook with isbn 10 1587205882, isbn 9781587205880 in. Eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of both. Cisco designed the new eigrpv6 eigrp for ipv6 to be almost identical to eigrpv4 eigrp for ipv4. To become neighbors, the following parameters must match on both routers.
Continuing our cisco commands cheat sheet for ccna students, this is our 3rd post. Ccna command quick reference scott empson 800 east 96th street indianapolis, in 46240 usa cisco press. For eigrp configuration information and examples, refer to the cisco ios ip routing. Enable the eigrp protocol on both routers so that hosts on the both routers can. Cisco calls eigrp a distancevector routing protocol or sometimes an advanced distancevector or even a hybrid routing protocol cisco proprietary protocol. You will modify bandwidth and configure passive interfaces to allow eigrp to function more efficiently. Bgp cisco configuration cisco products cloud comparison configuration dhcp eigrp high availability interview ip packet ip routing ipv6 ip voice juniper configuration juniper routing juniper security lan technologies layer 1 load balancing monitoring and management mpls multicast nat. Learn the basics of ciscos enhanced interior gateway routing protocol eigrp operation and configuration. Topologytablecanbe displayedwith show ip eigrp topology command 3. This protocol is an evolution of an earlier cisco protocol called igrp, which is now considered obsolete. The ccna routing and switching portable command guide, third edition, is filled with valuable, easytoaccess information and is portable enough for use whether youre in the server room or the equipment closet.
The ipv4 and ipv6 versions of eigrp are even closer to each other than the two corresponding versions of ospf. Eigrp stub routing feature improves network stability, reduce resources. The enhanced interior gateway routing protocol eigrp is an enhanced version of the interior gateway routing protocol igrp developed by cisco. This posts has included all the ccna commands that an exam. Eigrp is a cisco proprietary routing protocol which means its only found on cisco equipment. Eigrp stub advertises summary and directly connected routes. An autonomous system is simply a group of eigrpenabled routers that should become eigrp neighbors and exchange routes. Eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of both distancevector and linkstate routing protocols. This posts consists of a list of important ccna commands that you may need to use both in ccna exams and in real world. This tutorial explains how to configure eigrp routing protocol in cisco routers step by step with practical example in packet tracer. By reading this course, you will acquire the necessary information and concepts about ccna. Eigrp is a classless protocol, and thus supports vlsms. Ccna routing and switching portable command guide is filled with valuable, easytoaccess informationand its portable enough to use whether youre in the server room or the equipment closet.
Eigrp administrative distance 5 summary 90 internal 170 exernal eigrp multicast address 224. Eigrp requires an autonomous system number because that is how it determines what routers belong to the same eigrp routing domain. You can verify that routers have become neighbors by using the show ip eigrp neighbors command on either router. In classless routing protocols, subnet information is exchanged during routing updates. Eigrp was designed by cisco system as a proprietary protocol which is available only on cisco routers. Here is how we can configure eigrp on both routers. Eigrp supports classless routing, vlsm, route summarization, load balacing and many other useful features. The convergence properties and the operating efficiency of eigrp have improved substantially over igrp, and igrp is now obsolete. Part iii routing section the routing table section 14 static vs.
Eigrp has a default administrative distance of 90 for internal routes and it is often the most preferred routing protocol because it has the lowest administrative distance. This command is executed in router configuration mode of rip, eigrp or ospf to configure the routing process to redistribute routes from a different source into the configured routing process such as static into rip or rip into ospf. Enhanced interior gateway routing protocol eigrp is an advanced dynamic routing protocol that is used for routing decisions and configuration on the routers. Eigrp adheres to the following hybrid characteristics. If you have no idea what eigrp is or how it works you should read my introduction to eigrp first. Configuring the eigrp route summarization named configuration 24. Routers that run eigrp must become neighbors before exchanging routing information. Here are all the ccnalevel routing and switching commands you need in one condensed, portable resource.
Eigrp is one of the routing protocols you need to master if you want to pass the cisco ccna exam. Routing table eigrp routing table terms active state router is trying to find a route. Eigrp enhanced interior gateway routing protocol is an advanced distance vector routing protocol. The network depicted above consists of only two routers. Mohamed salem is a communication engineer and an it professional. In order to become neighbors, all routers must be configured with the same as number. Privileged mode execlevel mode provides access to all other router commands. Notice that eigrp for ipv6 routerid must be an ipv4 address. Dual also helps ensure a loopfree routing environment. The purpose of this lab is to explore the functionality of the eigrp routing protocol. Pdf ccna routing and switching portable command guide.
You cannot run eigrp on juniper or adtran or any other router for that matter since eigrp is special only to cisco. Show commands show ip protocols show metrics and parameters of current protocols show ip eigrp neighbors show neighbours show ip eigrp neighbors shows ints with eigrp can specify int or as show ip route eigrp routing table eigrp details show ip. Erase the startup configuration and reload a router to the default state. Older cheat sheets may contain additional commands, such as ipx which is no longer in the exam. To configure eigrp only on interface fa00, the network 10.
Essential cisco ios commands ccna training, practice. Ccna in 21 hours 12 about this book about this book this ccna book offers you an easy, fast and precise understanding of the 640802 ccna syllabus. Rip v2, eigrp, ospf, bgp v4, and isis routing protocols routing protocols job is to maintain routing tables. The summarization in classless networks is manually controlled. Ccna routing and switching practice and study guide. How to configure eigrp in cisco packet tracer youtube. This results in more efficient utilization of ip addresses. Eigrp update messages fill the routerseigrptopologytables. For example, eigrp sends a partial routing table update, which includes just routes that have been changed, not the full routing table like distancevector algorithms c is not correct. This command will enable eigrp routing protocol in router.
Each router has a directly connected subnet that needs to be advertised through eigrp. Administrative distance is the measure used by cisco routers to select the best path when there are two or more different routes to the same destination from two different. If not then to summarize it all up for you in a pretty little nut shell. Troubleshoot eigrp 1 commands for troubleshooting eigrp 1 troubleshoot eigrp connectivity issues 114. In this lesson ill walk you through the configuration. For example a router with an eigrp as of 1 and another with an.
Ccna routing and switching portable command guide icnd1 100105, icnd2 200105, and ccna 200125 pdf download is the cisco certification tutorial pdf published by cisco press, 2016, the author is scott empson. This section includes ios commands that are absolutely identical on both routers and switches, except the. The convergence technology of eigrp is based on an algorithm called. This course covers everything in icnd1 and you will learn the basics of networking, how to configure a small network with cisco routers and switches and more. Eigrp was developed by cisco systems as a proprietary protocol, which can be used only on cisco routers but in 20 partial functionality of eigrp was converted to an open standard. Optional commands 48 rip version 2 49 troubleshooting rip issues 49 igrp routing. Eigrp supports classless routing and vlsm, route summarization, incremental updates, load balacing and many other useful features. For example if your router has 2 interfaces whose ip addresses are 192. Eigrp is an advanced distance vector routing protocol.
You should only use wildcard mask on eigrp if you have 2 or more interfaces that belong to the same major networks but you dont want to run eigrp on all of them. We can use any asn autonomous system number from 1 to 65,535. Dynamic routing uses broadcasts and multicasts to communicate with other routers. Eigrp 97 configuring eigrp 97 eigrp auto summarization 98 verifying eigrp 98. Whilst not an exhaustive ios command list it covers the majority of commands found in the exam. As with autosummarization, the router performing manual summarization will add.
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