Use the router ospf command in global configuration mode to enable ospf on the. 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. Aug 30, 2011 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 i isis, su isis summary, l1 isis level1, l2 isis level2 ia isis inter area, candidate default, u peruser static route. Enhanced interior gateway routing protocol also known as eigrp is a proprietary routing protocol developed by cisco. This is an advantage over enhanced interior gateway protocol, which is a proprietary standard from cisco. This means that it can be implemented on any platform, from any vendor or manufacturer. Feb 25, 2015 nowadays, routing protocols have become a crucial part of the modern communication networks. Examples of classful routing protocols include ripv1 and igrp. In 2008 free ccna workbook originally started as a sharable pdf but quickly. Enhanced interior gateway routing protocol eigrp open shortest path first ospf. 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 i isis, su isis summary, l1 isis level1, l2 isis level2 ia isis inter area.
Comparison of rip, eigrp, ospf, igrp routing protocols in. Simulationbased comparative study of eigrp and ospf for real. Applications like video conferencing, voice chatting, file. Open shortest path first ospf is an interior gateway routing protocol developed for ip networks based on the shortest path first or linkstate algorithm originated by edgars djikstra. Open shortest path first ospf open shortest path first ospf. 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. Another way to put it is that eigrp with its stub routers and the ability to summarize wherever you want will scale better in a messy topology. Basic redistribution between cisco eigrp and ospf 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. Among all the three chosen samples, ospf is the most widely used routing protocol in large enterprise networks.
Like eigrp, ospf supports vlsm and authentication and utilizes ip multicast when sending and receiving updates on multiaccess networks, such as ethernet. A comparison of ospfv3 and eigrpv6 in a small ipv6. However, ospf speakers will start to form neighbor relationships. I will do my best not to play favorites and instead stick to the facts yes, i do have a preference.
Scalability of the hub routers control plane overall control plane. Aug 10, 2005 this means that eigrp running in br1 advertises the ospf routes within its own as. Ipv4 ospf ipv6 ospf linear ipv4 ospf linear ipv6 ospf 0 0. Jan 15, 2020 eigrp is an enhanced distance vector protocol, relying on the diffused update algorithm dual to calculate the shortest path to a destination within a network. I retried this lab with tuning eigrp timers to 1 and 3 seconds and i only lost 2 pings. Ospf open shortest path first ospf is a standardized linkstate routing protocol, designed to scale efficiently to support larger networks. If no loopback use the interface with the highest configured ip. Interior gateway routing protocol igrp are used and compared for testing the performance 9.
Oct 04, 2017 difference between rip and ospf october 4, 2017 7 comments a routing protocol describes the rules that must be followed by a router while it interacts with neighboring routers to learn the path and to maintain the network in the routing tables. Describe ospf terminology and operation within various enterprise. Ospf employs a hierarchical network design using areas. Sep 05, 2009 open shortest path first ospf is an interior gateway routing protocol developed for ip networks based on the shortest path first or linkstate algorithm originated by edgars djikstra. Comparison of rip, ospf and eigrp routing protocols based on. It is link state routing protocol means in ospf every router has topological information in the form of lsas. This means that eigrp running in br1 advertises the ospf routes within its own as. Pdf performance evaluation of eigrp and ospf routing. This leads to monopoly on internet and that being a beast of its own kind, cannot have only one kind of routers for ever.
Jul 14, 2015 the open shortest path first protocol is an open standard. Eigrp and ospf comparison reliable dedicated servers vps. The open shortest path first protocol is an open standard. Yes, ospf as a place in the network is suitable on the wan. The main difference between ospf and rip is that rip only keeps track of the closest router for each destination address, while ospf keeps track of a complete. Difference between rip and ospf october 4, 2017 7 comments a routing protocol describes the rules that must be followed by a router while it interacts with neighboring routers to learn the path and to maintain the network in the routing tables. Since the ad of ospf is changed to high values, at this stage, ospf will not replace eigrp. Unlike the cisco proprietary protocol eigrp which was developed by cisco to replace ripv2, ospf is vendor independent and is the most used routing protocol. The word open means that anyone can read the rules or standard and write an application. Therefore a comparison of ospfv3 and eigrpv6 will be conducted using dedicated cisco hardware. It is loosely based on the original concept of igrp interior gateway routing protocol.
Communication technology facilitates provision of such services as file. The following outputs are taken from router r4 which shows the neighbors it has formed relationship with. This approach is suited for those who are adding osfp devices to a network and. You can verify that routers have become neighbors by using the show ip eigrp neighbors command on either router. Eigrp enhanced interior gateway routing protocol is ciscos proprietary routing protocol based on. There are many routing protocols out there today, some old and. We can enable eigrp only for specific networks using wildcard masks. Classful vs classless routing protocols continued classless routing protocols do send the subnet mask with their updates. Integrateda new network buildout combined with a protocol migration. The number in the router ospf or ipv6 router ospf or router ospfv3 command is only a process number to distinguish between multiple ospf processes running on the same router, but it is entirely independent of the autonomous system number in which the ospf is running. The eigrp route propagates to the other border routers. Pdf performance analysis of rip, eigrp, and ospf using opnet. Understanding ospf areas ingrid belosa december 12, 2014 configuration tips 1 comment whether you are preparing for the cisco ip routing exam or you are an experienced network engineer planning to implement the open shortest path first ospf routing protocol, you should familiarize yourself with the capability to divide your network into.
A comparison of ospfv3 and eigrpv6 in a small ipv6 enterprise. Each router has a directly connected subnet that needs to be advertised through eigrp. This can be used and deployed in a variety of networks. Difference between eigrp and ospf difference between. Moreover, as opposed to eigrp, ospf does not send out this process number in packets, so different routers can use different ospf process ids and still be able to talk to each other. This routing protocol was built by a committee, which is why it is an open standard. Mutual route redistribution is a common remedy when companies acquire other companies that use different routing protocols. In this post im going to look at the characteristics of ospf and eigrp when used in a dynamic multipoint vpn dmvpn. There are two major revisions of eigrp, versions 0 and 1. Many routing protocols are defined in technical standards documents called rfcs. Learn the basic of how to configure the open shortest path first ospf. On the performance comparison of rip, ospf, isis and. However, this is the only clear advantage of ospf over eigrp.
On the performance comparison of rip, ospf, isis and eigrp routing protocols vasos hadjioannou department of computer science university of nicosia nicosia, cyprus email. 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. If no rid use the loopback with the highest configured ip address upup. The network command in eigrp uses a classful network as the parameter by default, which means that all interfaces inside the classful network will participate in the eigrp process. Dec 03, 2014 administrative distance internal 90 external 170 external routes when the routes redistributed in eigrp it shows ad value 170 in routing table eigrp is now an open standard, cisco made it open standard in year 20. Neighbor table and topology table are maintained by the eigrp enhanced interior gateway protocol 10. There any many things which are in the basics of eigrp. It is a advance distance vector routing protcol therefore it also do rouing by rumour. And now we can configure ospf redistribution into our eigrp network on r3 with the router process command redistribute ospf 10. The network depicted above consists of only two routers.
Why would someone prefer ospf when eigrp is a perfectly fine. Examples of classless routing protocols include ripv2, eigrp. Routing protocol comparison routing protocol comparison v1. There are many routing protocols out there today, some old and some. Among different routing protocols, eigrp and ospf have been considered as the preeminent routing protocols for the realtime applications. Migrating from eigrp to ospf it organizations that want to migrate from eigrp to ospf have three options. The following table lists the differences between ospf and eigrp. Eigrp stands for enhanced interior gateway routing protocol. Ospf adheres to the following link state characteristics. Redistribution between cisco eigrp into ospf and vice.
Eigrp enhanced interior gateway routing protocol and ospf open shortest path first are two common routing protocols specifying how. To that end i will back everything up with data from my lab. Other closely related works are presented in 2,4, 5, 9 in which authors compared and analyzed two routing protocols ospfv3. A routing protocol specifies how routers communicate with each other to distribute information. Ospf is based on the shortest path first spf algorithm which is used to calculate the shortest path to each node.
However, 20,12 these studies lack the evaluation for the ipv6. Ospf open shortest path first is the most widely used igp interior gateway protocol large enterprise networks. Eigrp protocol is very flexible and it supports both ipv4 and ipv6, unlike ospf where ipv6 is only supported in ospfv3. Administrative distance internal 90 external 170 external routes when the routes redistributed in eigrp it shows ad value 170 in routing table eigrp is now an open standard, cisco made it open standard in year 20. In previous lessons i explained the basics of redistribution and i also showed you how to configure redistribution between ospf and rip. So join lazaro diaz, as he takes you through advanced topics and techniques in cisco routing, from configuring ripv2 routes for smaller networks, to eigrp, advanced distance routing, and ospf, a more complex protocol that brings many more features and greater flexibility to your network. Yes, eigrp as a place in the network is suitable on the wan. Djikstra states that ospfs metric is cost on cisco routers. Open shortest path first ospf was developed by the internet engineering task force ietf as a replacement to overcome the shortcomings of rip in rfc 2328. This approach is suited for those who are adding osfp devices to a network and will migrate existing devices from eigrp to ospf. Eigrp it is a cisco standard routing protocol now open standard protocol from 20 it supports maximum 255 routers in the network. A wealth of papers have compared ospf and eigrp in terms of converge times and resource usage, however few papers have assessed the performance of each when implementing their respective security mechanisms. Nowadays, routing protocols have become a crucial part of the modern communication networks. The pros and cons of ospf and eigrp all things binary.
Only feature that i can recall that eigrp has which ospf doesnt, is support for load balancing across links of different speeds. Performance analysis of rip, eigrp, and ospf using opnet. It is used to share the information from one router to the. A number of different cisco ios ospf configuration commands are available, but at its most basic, ospf configuration uses three commands. If no loopback use the interface with the highest configured ip address upup. Eigrp is denoted by d for internal and dex for external in routing table eigrp is the only protocol that have backu. Comparison of rip, ospf and eigrp routing protocols based. Ospf and eigrp in order to compare their attributes and performance. Difference between rip and ospf with comparison chart. I wanted to use eigrp and stub routers but cisco mentioned that more resources were being spent on bgpospf interoperability vs eigrpospf interoperability so i went bgp on that basis. Pdf evaluation of ospf and eigrp routing protocols for ipv6. I wanted to use eigrp and stub routers but cisco mentioned that more resources were being spent on bgp ospf interoperability vs eigrp ospf interoperability so i went bgp on that basis.
A routing protocols responsibility lies in determining the way routers communicate with each other in order to forward any kind of packets, from a source to a destination, using the optimal path that would provide the most efficiency. Interior gateway protocols type 1, linkstate routing protocols, such as ospf and isis. Ospf basic configuration ospf basic configuration pearson. Eigrp supports a hopcount of 255 routers 100 by default, as its only an advanced distance vector routing protocol. Thus, variable length subnet masks vlsms are allowed when using classless routing protocols. Pdf ipv4 addressing space has almost been exhausted. Ospf fundamentals unlike eigrp, which can support multiple network layer protocols, ospf can only support the internet protocol ip, specifically ipv4 and ipv6. Jun 12, 2015 basic redistribution between cisco eigrp and ospf 1. Basic redistribution between cisco eigrp and ospf 1. Ospf will form neighbor relationships with adjacent routers in the same area. Because eigrp works only on cisco and is its proprietary. Sep 11, 2015 enhanced interior gateway routing protocol eigrp open shortest path first ospf.