Igp is distant vector protocol which uses hops to determine the best route for a data packet to. The main two routing protocols are to be in the igrp is interior routing protocol and exterior routing protocol. Igrp interior gateway routing protocol igrp is a ciscoproprietary distancevector protocol, designed to be more scalable than rip, its standardized counterpart. Of course in order to use vlsm, a network administrator must use a routing protocol that supports it.
What is the enhanced interior gateway routing protocol. Brien posey, in the best damn windows server 2008 book period second edition, 2008. A comparative study of igp and egp routing protocols. Numerous documents about dynamic routing protocols from several different sources can nowadays. Typical examples of an as are a companys internal network and an isps network. A routing protocol that was designed and intended for use inside a. Interior and exterior routing protocol differ in how they route. The routing information protocol rip and open shortest path first ospf are the two most wellknown interior routing protocols used in the tcpip suite, and for this reason i have described each in considerable detail. A router is the software and hardware responsible for delivering packets between two subnets. Link state routing protocols build a complete topology of the entire network are and then. Cisco routers support vlsm with open shortest path first ospf, integrated intermediate system to intermediate system integrated is. To get from place to place outside your networks, i. This routing information can then be used to route networklayer protocols like ip interior gateway protocols can be divided into two categories. Interior and exterior gateway protocols dynamic routing.
Router used it to exchange routing data within an independent system. Switching from places to places between the routers, figure out. You also will see how to troubleshoot problems with eigrp. Interior versus exterior routing protocols interior carries isp infrastructure addresses only isps aim to keep the igp small for efficiency and scalability exterior carries customer prefixes carries internet prefixes egps are independent of isp network topology 43. Is, enhanced interior gateway routing protocol enhanced igrp, and static routing. Through limiting the number of hop counts allowed in paths between sources and destinations, rip prevents routing. Eigrp is a successor to the interior gateway routing protocol igrp.
Lets first talk about interior routing protocols and go over their main. The new book updates all covered routing protocols and discusses new features integrated in the latest version of cisco ios software. Enhanced interior gateway routing protocol is ciscos proprietary routing. Top 5 network routing protocols explained lifewire. One is to form an introduction to the igrp technology, for those who are interested in using, evaluating, and possibly implementing it. It is commonly used in the internet to exchange routing table information between two neighbor gateway hosts each with its own router in a network of autonomous systems. Networking explain interior and exterior routing protocols. If you want to communicate with a computer on a different subnet from your own, your computer must forward. Unit of routing policy an as is a connected group of networks having a single technical administration, consistent interior routing, and a single well defined exterior routing policy rfc 1786,1930. Dynamic routing protocols for campuses services geant. Igrp adheres to the following distancevector characteristics. Protocol igp like isis, ospf, rip etc to populate the routing tables of its routers. The protocol ensures that every router has routing. Interior routing protocol are designed to be using inside and as autonomous system while exterior routing protocols are designed to be used between as.
Rip, ospf, etc ass want to choose own nonlocal routing policy interdomain routing must accommodate this bgp is the current interdomain routing protocol bgp. The performance of each routing protocol is different from each other. Autonomous systems routing is handled by interior gateway protocols. Border gateway protocol example as1 as2 as3 interior router.
Tcpip interior routing protocols rip, ospf, ggp, hello. Basically, interior protocols are meant to dynamically route data across a network that you fully control and maintain. Eigrp stands for enhanced interior gateway routing protocol. Rip and ospf o exterior routing n routing between autonomous systems n only one exterior routing protocol is usually used for exterior routing n examples. Now, they are not related, theyre completelydifferent categories versus dynamic and link state. The course analyzes and compares these routing protocols, including ipv6, for their successful implementation in largescale, serviceoriented networks. The interior routing protocol is used to connect with the single autonomous systems and also it can communicate with the single autonomous system. Another two categories of dynamic routing protocols you should pay attention to are interior versusexterior protocols.
Routing protocols fall into two classifications, interior and exterior routing gateway protocols. Add one to the hop count for each advertised destination 2. Interior gateway routing protocol igrp is a distance vector interior gateway protocol igp developed by cisco. What is the interior gateway routing protocol igrp. Interior gateway routing protocol created in part to defeat the confines of rip routing information protocol in. Instructor so we learned about distance vectorand link state.
Comparison of rip, eigrp, ospf, igrp routing protocols in. Routing is the process your computer uses to transmit a packet between different subnets. Protocolindependent configuration guide, cisco ios. Interior and exterior routing o interior routing n routing inside an autonomous system n each as can chose its own interior routing protocol n examples. Ipv6, its use with interior routing protocols, and its interoperability and. The other is to give wider exposure to some interesting ideas and concepts that are embodied in igrp. Eigrp is an advanced distancevector routing protocol that addresses many of the limitations of other routing protocols, including those of its predecessor, interior gateway routing protocol igrp. Igrp was created in part to overcome the limitations of rip maximum hop count of only 15, and a single routing metric when used within large networks. Dynamic routing protocol uses a route that a routing protocol adjusts automatically for topology or traffic changes. Refer to configuring igrp, the cisco igrp implementation and igrp. Repeat for each advertised destination if destination is not in my routing table add the destination to my table else if nexthop field is the same replace existing entry with the new advertised one. Interior gateway routing protocol igrp is a proprietary distance vector routing protocol used to communicate routing information within a host network. The dynamic routing protocol that is the most different from all the others is the border gateway protocol bgp.
Survey on the rip, ospf, eigrp routing protocols international. Routing information protocol rip interior gateway routing protocol igrp link state protocols open shortest path first ospf intermediate system to intermediate system isis exterior gateway protocols. Pdf large ip networks cannot be possible without routing protocols providing the appropriate paths between end sites. Socalled routing protocols are the family of network protocols that enable computer routers to communicate with each other and in turn to intelligently forward traffic between their respective networks. Ripv2 routing information protocol cisco community. Interior gateway routing protocol igrp it is distance vector igrp interior gateway protocol makebelieve by cisco. It is an interior gateway protocol that can be scaled to support many different network sizes and topologies. Protocol and port udp port 520 ip protocol 9 ip protocol 88 ip protocol 89 tcp port 179 routing protocol comparison routing protocol comparison v1. How to configure interior gateway routing protocol. To ensure information is delivered to the correct destination at a reasonable level of performance forwarding given a forwarding table, move information from input. Unicast routing protocols comparison type algorithm distance vector bellmanford rip distance vector dual eigrp link state dijkstra ospf link state dijkstra isis path vector path selection bgp admin distance standard 120 rfcs 2080, 2453 90170 external5 summary cisco proprietary 110 rfcs 2328, 5340 115 iso 10589, rfc 1142 20200 ibgp.
Exterior gateway protocol egp is a routing protocol which is used to find network path information between different networks. Igrp manages the flow of routing information within connected routers in the host network or autonomous system. Comparison of rip, ospf and eigrp routing protocols based on. Comparing dynamic routing protocols network computing. Routing protocols that route between autonomous systems or routing domains are referred to as exterior gateway protocols egps.
Among all routing protocols, eigrp and ospf evaluation in a simulation based network model for real time application such as video streaming and voice conferencing. In this video you will see how to configure eigrp and explain the processes what are happening on the background. Ass want to choose own local routing algorithm as takes care of getting packets tofrom their own hosts intradomain routing. Introduction to eigrpenhanced interior gateway routing. Enhanced interior gateway routing protocol eigrp summary route. 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. Enhanced interior gateway routing protocol eigrp is an advanced distance vector routing protocol based on the principles of the interior gateway routing protocol igrp. The nokia interior routing protocols course examines the operation and use of standardsbased routing protocols, such as open shortest path first ospf and intermediate systemtointermediate system isis. Whereas igps discover paths between networks, egps discover paths between autonomous systems. The protocols are utilized to keep track of getting between destinations to other side of a network or to administrate the networks. In addition to these, there are several other tcpip interior routing protocols that fall into one of two categories. It is used by routers to exchange routing data within an autonomous system igrp is a proprietary protocol.
The routing protocols used to facilitate the exchange of routing information between routers within an as are called interior routing protocols or historically. An interior protocol is a routing protocol used inside interior to an independent network system. Pdf study and performance of interior gateway ip routing protocols. Bgp pdf created with fineprint pdffactory pro trial version. First, the routing protocol informs or shares the information with their associative neighbors and then throughout the network, in which topology is determined 5 10. Two kinds of routing protocols are used for internal and external network communication, namely, interior gateway protocols igp and exterior gateway protocols egp. Rip, eigrp and ospf are all interior gateway protocols igp while bgp is an exterior gateway protocol egp. In this paper we present a survey and a test performance of the main interior gateway ip routing protocols although some of them can work with other nonip protocols that are used inside the. The routing information protocol rip is a distancevector, interior gateway igp routing protocol used by routers to exchange routing information. Routing protocols are divided into two general groups. Tcpip interior routing protocols rip, ospf, ggp, hello, igrp, eigrp modern tcpip routing architecture groups routers into autonomous systems ases that are independently controlled by different organizations and companies. Igrp sends out periodic routing updates every 90 seconds.
Hundreds of different network protocols have been created for supporting communication between computers and other types of electronic devices. In tcpip terminology, these independent network systems are called autonomous systems. Pdf alcatellucent interior routing protocols lab guide. An interior gateway protocol igp is a type of protocol used for exchanging routing information between gateways commonly routers within an autonomous system for example, a system of corporate local area networks. Through limiting the number of hop counts allowed in paths between sources and destinations, rip prevents routing loops. Enhanced interior gateway routing protocol eigrp is an example of a balanced hybrid routing protocol. Rip prevents routing loops by implementing a limit on the number of hops. This document introduces interior gateway routing protocol igrp. So this is yet another way to classify thosedynamic routing protocols were learning about. Both are owned by cisco and operate only on their devices. Interior gateway protocols rip, ospf interior gateway protocols rip and ospf what is routing.
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