Learn ospf configuration commands, ospf show commands, ospf network configuration process id, network id, wild card mask and area number and ospf routing in detail. Enhanced interior gateway routing protocol eigrp configuration in router01. Open shortest path first ospf is a linkstate routing protocol, rather than a distance vector protocol. This router is the junction between the two networks and runs both ospf and eigrp.
Interior gateway routing protocol suite of routing protocols is designed and developed by cisco systems. Ospf is an open standard protocol, you learn more why we use ospf and ospf quiz from here. Redistribution between cisco eigrp into ospf and vice versa. Prerequisites requirements cisco recommends that you have knowledge of eigrp. Once you are in the router ospf configuration submode, configure the lan network 172. However, we have not configured redistribution yet. Connect to router01 console and use the following ios commands to configure enhanced interior gateway routing protocol eigrp in router01. Ospf employs a hierarchical network design using areas. This type of configurational method is used when we want to inject all routes in eigrp autonomous system to rip database and show up as a regular rip route, and not. One of the biggest advantages that eigrp has over other highly scalable routing protocols is that its configuration is rather simple. Eigrp enhanced interior gateway routing protocol eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of both distancevector and linkstate routing protocols. The routers should be able to ping one another, and each pc should be able to ping its default gateway. Basic cisco router eigrp configuration pluralsight. Verify on r1 and r5 that routes from the opposite autonomous system exist in their routing table.
Ospf will form neighbor relationships with adjacent routers in the same area. In part 4, you will modify the bandwidth so that the link between r1 and r3 has a lower bandwidth than the link between r1r2 and r2r3. When configuring the redistribution commandinside of the eigrp process,an administrator is essentially sayingtake routes from. Open shortest path first ospf operating inside a distinct autonomous system. You can set up your router to load balance over links with different metric to reach a destination. This tutorial explains how to configure ospf routing protocol step by step with practical example in packet tracer. Eigrp, ex eigrp external, o ospf, ia ospf inter area. It is an open standard, so it can be run on routers from different vendors. Open shortest path first ospf is an active routing protocol used in internet protocol. Comparison of rip, ospf and eigrp routing protocols based. This is a basic labs regarding ospf single area configure related to ccna or icnd12 exam. This command is executed in eigrp configuration mode to statically specify an eigrp neighbor. Each router has a directly connected subnet that needs to be advertised through eigrp. The following outputs are taken from router r4 which shows the neighbors it has formed relationship with.
How to configure enhanced interior gateway routing protocol. Eigrp uses diffusing update algorithm dual to determine the best path among all feasible paths. Eigrp has the fastest router convergence among the three protocols we are testing. Router switch configuration using packet tracer gns3. Once you are in the router eigrp configuration sub. It also supports three other parameters to calculate its metric.
N1 ospf nssa external type 1 n2 ospf nssa external type 2 e1 ospf external type. The main difference here is that a linkedstate protocol does not send its routing table in the form of updates, but only shared its connectivity configuration. Since the ad of ospf is changed to high values, at this stage, ospf will not replace eigrp. The first step is to gain access to the cisco device and access global configuration mode. On the router thats running eigrp 200 and ospf 10, youll do dual redistribution. Ospf is based on the shortest path first spf algorithm which is used to calculate the shortest path to each node. Eigrp enhanced interior gateway routing protocol, is a cisco proprietary hybrid routing protocol. However, ospf speakers will start to form neighbor relationships. You need to add the area 10 configuration to r2 and the area 20 configuration to r3 to complete the configuration. One of the advantages of eigrp is that, unlike ospf and many other routing protocols, eigrp also supports unequalcost load balancing. Enhanced interior gateway routing protocol or eigrp is designed by cisco system. This time, well take a look how you can configure multi area ospf. Open shortest path first ospf routing protocol dummies. Total delay is 500120 microseconds, minimum bandwidth is 0 kbit.
In this lab, you will configure eigrp for the topology and networks shown above. Particularly it is a link state routing protocol and includes into the group of interior gateway protocol. The router will share the eigrp learned routes with the ospf routers in area 20. Above we have r1 and r2 in area 0, the backbone area. The configuration of eigrp is similar to other routing protocols. Cisco ios router configuration commands cheat sheet pdf. Redistribution bgp, eigrp, ospf hello patrick, with ebgp sessions on loopbacks you need the multihop statement to make it work.
How to configure eigrp routing protocol with simple network. The ospf network command uses a combination of networkaddress and wildcardmask. In this example, we will configure eigrp on packet tracer. Ive got ospf configured on the top,an eigrp on the bottomwith router three being the bridge between the two. Eigrp enhanced interior gateway protocol designed by cisco system which can be used only in cisco routers, but in 20 it became open source, so it can be used in other routers 5 7. D eigrp, ex eigrp external, o ospf, ia ospf inter area n1 ospf nssa external type 1, n2. Here is how we can configure eigrp on both routers. Eigrp introduction to eigrp basic eigrp conguration eigrp packets eigrp neighbor adjacency eigrp neighbor and topology table eigrp unequal load balancing eigrp variance command example eigrp summarization eigrp. Use summary address verify troubleshoot introduction this documents describes how to configure default routes in enhanced interior gateway routing protocol eigrp.
Use default route and redistribution verify method 2. This ospf lab is created in packet tracer and you will learn the ospf single area configuration from this lab. Also, notice that there are no ospf routes in the routing table. This command is executed in eigrp router configuration mode to specify which interfaces participate in the eigrp routing process. R3 runs ospf and eigrp, it will also be configured for redistribution. Chapter 4 lab 42, redistribution between eigrp and ospf.
How to configure eigrp routing protocol with simple. By collecting connectivity information from all of the devices on the network, ospf can store all this. This article is mainly concentrated on configuration of rip and eigrp together to get the above mentioned benefits. Use summary address verify troubleshoot introduction. We will perform redistribution on this router in a bit. Eigrp uses bandwidth and delay of the line, by default, to calculate its distance metric. Use the ip defaultnetwork command to accomplish this task. Ospf open shortest path first ospf is a standardized linkstate routing protocol, designed to scale efficiently to support larger networks.
Jul 26, 2017 start by entering ospf configuration mode. Eigrp supports classless routing, vlsm, route summarization, load balacing and many other useful features. Eigrp has several advantages over routing information protocol rip and interior gateway routing protocol igrp, and even some advantages over open shortest path first ospf and intermediate systemtointermediate system isis. Ill configure router threeto redistribute any eigrp known routes into ospfusing as few options as possible,router ospf 10and now redistribute eigrp 10. Eigrp, much like ospf, builds three separate tables. Redistribution between cisco eigrp into ospf and vice. You can verify that routers have become neighbors by using the show ip eigrp neighbors command on either router. Home downloads download cisco ccnp routing pdf study guide. Ospf adheres to the following link state characteristics. Eigrp uses a default bandwidth based on the type of interface in the router. Redistribution ospf, rip, eigrp, static cisco community. Eigrp and ospf networking questions and answers for.
Open shortest path first ospf is one of the dynamic routing protocols amongst others such as eigrp, bgp and and rip. In this paper, a wireless local area network wlan is designed and various routing protocols like routing information protocol rip, enhanced interior gateway routing protocol eigrp, open shortest path first ospf, and interior gateway routing protocol igrp are used and compared for testing the performance 9. Eigrp has a maximum hopcount of 224, though the default maximum hopcount is set to 100. Upon completion of this course, you will be prepared for the cisco certified network professional ccnp routing and switching certification exams 300101 route, 300115 switch, and 3005. Using live labs allow you to develop your practical it skills in a safe working environment without the need to invest in your own hardware and software.
Same goes with eigrp when you redistribute ospf into eigrp, all the routes from ospf will be carried over to eigrp and advertised through out the autonomous system. To accomplish unequalcost load balancing, the variance command is used. Notice that the cli warns thatonly classful networks will be redistributed. Finally, eigrp was configured to redistribute all ospf routes from process id 20, and apply a metric of 0 bandwidth, delay, 255 reliability, 1 load, and 1500 mtu to the redistributed routes. Ospf configuration in packet tracer computer networking. Configure r3 to redistribute eigrp routes into ospf using the cost of 50000 then redistribute ospf routes into eigrp using a t1 bandwidth and 20,000 microsecond delay.
If this process is not familiar, then read more about rip configuration. Jun 11, 2019 this ospf lab is created in packet tracer and you will learn the ospf single area configuration from this lab. 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.
Oct 22, 2014 i wont tell you the answer completely, but lets use the eigrp network. Ospf configuration in packet tracer lab with pdf networking. With this eigrp config, we will see important eigrp commands on cisco packet tracer. It is perhaps one of the most popular link state routing protocols.
Ill check the ospf database with do show ip ospf da. In my introduction on ospf i explained why we sometimes use multiple areas for ospf and in our configuration example, i showed you how to configure ospf for a single area. D eigrp, ex eigrp external, o ospf, ia ospf inter area n1 ospf nssa external type 1, n2 ospf nssa external type 2 e1 ospf external type 1, e2 ospf external type 2, e egp. In following figure there are the three routers with. Enhanced interior gateway routing protocol eigrp is an example of a balanced hybrid routing protocol. The network depicted above consists of only two routers. In addition, you will set passive interfaces on each router. The ospf routing protocol is now having an increasingly vital role in modern network. Therefore, its routing table contains the routes from both networks. Eigrp enhanced interior gateway routing protocol is ciscos proprietary routing protocol based on diffusing update algorithm. Eigrp adheres to the following hybrid characteristics. This command uses the network id of the subnet and a wildcard mask to identify the network range. The version 2 of open shortest path first ospf defined in 1998 for. I wont tell you the answer completely, but lets use the eigrp network.
Comparison of rip, eigrp, ospf, igrp routing protocols in. How to configure enhanced interior gateway routing. Heres what the configuration of the routing protocols look like. Configure r1 s0, e0, r2 s1, s0, e0 in eigrp as 100 and r3 s02 in eigrp as 200. Please refer the beginning of this lesson to view the enhanced interior gateway routing protocol eigrp configuration ios command. Enhanced interior gateway routing protocol eigrp is a powerful distance vector routing protocol and is relatively easy to configure for basic networks. This tutorial explains how to configure eigrp routing protocol in cisco routers step by step with practical example in packet tracer. Now see the benefits of using this type of routing configuration. Prerequisite eigrp fundamentals enhanced interior gateway routing protocol eigrp is a dynamic routing network layer protocol which works on the protocol number 88. Why does eigrp make the administrative distance different for summary routes.
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