Home downloads download cisco ccnp routing pdf study guide. Enhanced interior gateway routing protocol eigrp is an evolved version of igrp that addresses the demands of largescale internetworks and the changes in network technology that have been developed since the implementation of igrp routers that already use igrp can use eigrp because the metrics for both protocols are directly translatable, i. Path first spf algorithm which is used to calculate the shortest path to each node. Eigrp is an advanced distance vector routing protocol. Eigrp is activated on a router by entering configuration mode and the eigrp command. Originally, it was only available on cisco hardware but since a few years, its now an open standard. Under interface config mode, issue following command. Eigrp is a very popular routing protocol selection for those. Pdf eigrp a fast routing protocol based on distance vectors. Redistribution between cisco eigrp into ospf and vice. Configuring mutual eigrp and rip redistribution free.
Basic cisco router eigrp configuration pluralsight. Out of scope eigrp pece for mpls l3vpn eigrp over the top otp eigrp stub site iwan eigrp multi topology routing mtr in named mode 2 3. If youve completed lab 102 configuring mutual ospf and rip redistribution and lab 103 configuring mutual ospf and eigrp redistribution then you should be no stranger to mutual route redistribution if you did not complete the previous labs then to summarize mutual route redistribution up in a pretty little nut shell. To locate and download mibs for selected platforms. Eigrp can call on rtp to provide reliable or unreliable service as the situation warrants. Eigrp converges very quickly, it takes about the same time or not less than ospf takes to converge, but without the negatives of ospf. Eigrp for ip is a concise, complete, and practical guide to understanding and working with eigrp. Most networks cant supportand have no need for the full internet route table,instead they rely on a single default routeto reach the internet.
Bgp evpn support, the babel routing protocol as well as an experimental version of eigrp. Basic eigrp routing lab configuring basic eigrp routing lab basic objectives. Ccna lab manual router infotech, confidential document only for internal circulation page 3 procedure. Eigrps benefits is that it requires much less processing time, much less memory and much less design than say ospf. Eigrp uses diffusing update algorithm dual to determine the best path among all feasible paths. Eigrp adheres to the following hybrid characteristics.
Eigrp configuration with example stepbystep icnd2 200105. The configuration of eigrp for ipv6 is not overly complicated. With rtp, eigrp can simultaneously multicast and unicast to different peers, which allows for maximum efficiency. These routes are denoted as d ex routes in the routing table. Eigrp has been around for some time on cisco equipment and for the most part is only supported on cisco devices.
To properly configure r1 to load balance traffic on a 5. Basic cisco router eigrp configuration select the contributor at the end of the page this article is the third in a series of articles covering the basics of cisco networking. What is the enhanced interior gateway routing protocol. By default, eigrp uses only up to 50% of an interfaces bandwidth for eigrp information, which prevents the eigrp process from overutilizing a link and not allowing enough bandwidth for the routing of normal traffic. Eigrp is a distancevector protocol and is based on the dual algorithms. Enhanced interior gateway routing protocol eigrp is one of the most popular internal routing protocols used on medium to large businesses and education networks today. Lets setup eigrp on our branch router and our hq router. Enhanced interior gateway routing protocol eigrp is another routing protocol in addition to rip and ospf. Eigrp metric weight k11, k20, k31, k40, k50 eigrp maximum hopcount 100 eigrp maximum metric variance 1 redistributing. Eigrp loopfree alternate lfa fast reroute frr is a feature that allows eigrp to switch to a backup path in less than 50 ms. Enable the eigrp protocol on both routers so that hosts on the both routers can. Comparison of rip, ospf and eigrp routing protocols based.
Its time for the exciting part of our enhanced interior gateway routing protocol, or eigrp, discussion, configuration. C connected, s static, r rip, m mobile, b bgp d eigrp, ex eigrp external, o ospf, ia ospf inter area n1 ospf nssa external type 1, n2 ospf nssa external type 2. Comparison of rip, ospf and eigrp routing protocols based on. It is a ciscoproprietary routing protocol for tcpip. May 07, 2016 configuring a dynamic routing protocol eigrp for connecting different networks. Eigrp stands for enhanced interior gateway routing protocol and is a routing protocol created by cisco. We can use following command to summarise eigrp routes. Redistribution between cisco eigrp into ospf and vice versa. Eigrp routes are denoted in the routing table with a d, which stands for dual diffusing update algorithm, which is the routing algorithm used by eigrp.
Eigrp a fast routing protocol based on distance vectors. And lets ensure that hq has the ability to route to the 10. Eigrp is a ciscoproprietary hybrid routing protocol, incorporating features. Eigrp and troubleshooting routing protocols 69 ip routing protocols eigrp appletalk routing protocol ipx routing protocols ip. Instructor another key concept for the ccnp testas well as most modern networks is default routing. Dual, the algorithm used to converge the control plane to a single set of loopfree paths is based on research conducted at sri international.
Eigrp overview eigrp is a cisco proprietary routing protocol loosely based on their original igrp interior routing protocol. One of the great unique features eigrp brings to the table is the ability to loadbalance traffic across unequal links. 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. Eigrp routing information protocol is widely deployed interior gateway routing protocol. This is an advantage and a disadvantage depending on what side of the debate you are on.
This lab will discuss and demonstrate the configuration and verification of the cisco eigrp dynamic routing protocol. Nov 30, 2010 eigrp as123 has been preconfigured for you and is advertising all networks. More detailed description of these three routing protocols will be included later. Eigrp is an exceptional option as it mixes a number of the major advantages of other routing. Eigrp has the fastest router convergence among the three protocols we are testing. Eigrp basics eigrp was developed as a hybrid distance vector routing protocol that uses many of the same composite metrics as the interior gateway routing protocol igrp. Rip and eigrp configuration on same network submitted by satish tiwary on wed, 071020 10. Configuring basic eigrp eigrp is an extremely common routing protocol due to its simplicity and ease of configuration. Enhanced interior gateway routing protocol eigrp is an advanced distance vector routing protocol based on the principles of the interior gateway routing protocol igrp. Voici le detail des fonctionnalites dune passive interface. If we consider an example, the eigrp packets that are encapsulated in the ip can be sent and receive by using the advantage of the ip eigrp module. Fast reroute means we switch to another next hop, loopfree alternate is an alternative path in the network that is loop free.
Configuration eigrp pour ipv4 reseaux informatiques. Ensure router cole and santiago only have a single 172. Configure the ip addresses on the routers using the following 192. Summarizing ip routes with eigrp and ospf techrepublic. For our eigrp config example, we will use the below topology on packet tracer. Enhanced interior gateway routing protocol eigrp is an advanced dynamic routing protocol that is used for routing decisions and configuration on the routers. Administrative distance for internal eigrp is 90 and that of external eigrp is 170. Create a practice lab as shown in following figure or download this. So, in global configuration mode, we use the good old router command and then we specify our dynamic routing protocol that we want to enable. Linkstate packets there are different types of link state packets, those are. Eigrp has a few methods to disseminate the default route. Notice that the summary is placed on the interface for eigrp. He is the author of a book dedicated to passing the ccie written exam and has helped with many other titles related to cisco ios. Eigrp has a faster convergence time as compare to ospf.
Eigrp is called a hybrid or advanced distance vector protocol and most of the rules that apply to rip also apply here. Sep 04, 2016 eigrp is an advanced distance vector routing protocol. This tutorial explains how to configure eigrp routing protocol in cisco. It focuses on eigrp in the context of ip, although the principles learned from this guide can be applied to the other major network protocols that eigrp supports, including ipx and appletalk. Mar 26, 2017 enhanced interior gateway routing protocol eigrp is an advanced dynamic routing protocol that is used for routing decisions and configuration on the routers. Eigrp enhanced interior gateway routing protocol eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of both distancevector and linkstate routing protocols. As with autosummarization, the router performing manual summarization will add. Eigrp enhanced interior gateway routing protocol is ciscos proprietary routing protocol based on diffusing update algorithm. Linkstate packets there are different types of link state packets, those are what you normally see in an ospf database appendix a. Introduction this document describes the enhanced interior gateway routing protocol eigrp, a routing protocol designed and developed by cisco systems, inc.
Redistribution between cisco eigrp into ospf and vice versa example the most common scenario for big enterprise networks with multiple routers is to have a single igp routing protocol igp interior gateway protocol running between the routers in order to distribute all the routing information of the network. Jun 25, 2018 here routers r1, r2 and r3 are configured with eigrp and no eigrp runs in between r3 and r4. Inaugural frrouting release available for download. If no backup route exists in the routing table, an eigrp router will query its neighbors until an alternative route is found. It has several enhancements to scale the enterprise size network. The same concepts apply to eigrp when you redistribute rip into eigrp, all the routes from rip will be injected into the eigrp topology table and advertised through out the autonomous system as an eigrp external route. The 1005a can run eigrp so no redistribution is needed between the 2500b and the 1005a. This article takes a look at the configuration of the enhanced interior gateway routing protocol eigrp. Rfc 7868 ciscos enhanced interior gateway routing protocol.
Eigrp as123 has been preconfigured for you and is advertising all networks. There are plenty of loopbacks with ip addresses configurated for you to summarize. How to configure eigrp in cisco packet tracer youtube. Redistribution between cisco eigrp into ospf and vice versa example the most common scenario for big enterprise networks with multiple routers is to have a single igp routing protocol igp interior gateway protocol running between the routers in order to distribute all. Scribd is the worlds largest social reading and publishing site. Eigrp was designed by cisco system as a proprietary protocol which is available only on cisco routers. As a distancevector protocol, the eigrp router send updates to its neighbors as networks change, thus allowing the convergence to a known. Eigrp stands for enhanced interior gateway routing protocol. This is mainly used for protocolspecific requirements and is responsible for the network layer. Configuring a dynamic routing protocol eigrp for connecting different networks. This tutorial explains how to configure eigrp routing protocol in cisco routers step by step with practical example in packet tracer.
Configure and cable the serialethernet interfaces as indicated in the above diagram. For example a router with an eigrp as of 1 and another with an as of 150 will not form adjacency they will simply ignore each other. An autonomous system number that is the same on all network routers must be entered. To enable eigrp on a router you use its router command router eigrp. Eigrp explained enhanced interior gateway routing protocol. Enhanced interior gateway routing protocol is ciscos proprietary routing protocol based on diffusing update algorithm. You are not allowed to use eigrp autosummarization. Both are owned by cisco and operate only on their devices. Eigrp requires an autonomous system number because that is how it determines what routers belong to the same eigrp routing domain. Eigrp is a successor to the interior gateway routing protocol igrp. In the past year, henry has focused on architectural design and implementation in cisco internal networks across australia and the asiapaci. Igrp, eigrp, isis, rip, bgp, static or other instances of the ospf routing process are called autonomous system boundary router asbr. The specific number chosen does not matter, as long as a value between 1 and 65535 is entered and the entry is. Eigrp is an advanced distancevector routing protocol, it can only use it in an allcisco network, but eigrp more than makes up for this deficiency by being easy to configure, fast, and reliable.
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