Sep 18, 2012 in this video you will see how to configure eigrp and explain the processes what are happening on the background. You also will see how to troubleshoot problems with eigrp. Enhanced interior gateway routing protocol enhanced interior gateway routing protocol eigrp is a cisco proprietary protocol, which is an improved version of the interior gateway routing protocol igrp. 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. The enhanced interior gateway routing protocol is an enhanced distance vector routing protocol. 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. The protocol ensures that every router has routing. Different types of routing protocols are applied to specific network environment.
Enhanced interior gateway routing protocol eigrp is an interior gateway protocol suited for many different topologies and media. The routing information protocol rip is one of the oldest distancevector routing protocols which employ the hop count as a routing metric. If you want support information for the cisco sr 500 series secure. This tutorial explains how to configure eigrp routing protocol in cisco routers step by step with practical example in packet tracer. Configuring ip routing protocols on cisco routers page 2 of 59 file. Cisco developed igrp in the mid1980s as an answer to the limitations of rip, the most significant of which are the hop count metric and the 15hop network size. Short for enhanced interior gateway routing protocol, eigrp is a proprietary cisco protocol based on igrp that combines the advantages of linkstate protocols with distance vector protocols. Rip routing information protocol is one of the oldest routing protocols still in service. Mar 11, 20 only link state protocols have that capability but i know eigrp also uses some linksate protocol features to discover and update the neighbor. I have been working with cisco firewalls since 2000 where we had the legacy pix models before the introduction of the asa 5500 and the newest asa 5500x series. Eigrp a fast routing protocol based on distance vectors. Eigrp is a successor to the interior gateway routing protocol igrp. Enhanced interior gateway routing protocol eigrp enhanced interior gateway routing protocol eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of both distancevector and linkstate routing protocols.
Both are owned by cisco and operate only on their devices. Configuring mutual eigrp and rip redistribution free ccna. Eigrp adheres to the following hybrid characteristics. Rip routing information protocol, distance vector ospf open shortest path first, link state isis intermediate systemintermediate system eigrp enhanced interior gateway routing protocol, distance vector, cisco proprietary exterior gateway protocols egp exterior gateway protocol, replaced by bgp. Eigrp stands for enhanced interior gateway routing protocol, it is also called balanced hybrid routing protocol or advanced distance vector routing protocol.
Dec 20, 2016 enhanced interior gateway routing protocol eigrp is an advanced distance vector routing protocol based on the principles of the interior gateway routing protocol igrp. It took me years to work out that the problem with this question is the question itself, not the answer. Dynamic routing protocol uses a route that a routing protocol adjusts automatically for topology or traffic changes. The underlying algorithm is reputed to be optimal with respect to the eigrp metric. Exterior gateway protocol egp border gateway protocol bgp routing software.
Rip prevents routing loops by implementing a limit on the number of hops allowed in a path from source to destination. 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. Exterior gateway protocols exchange routing information between autonomous systems. 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. Three typical types of routing protocol are chosen as the simulation samples. The protocol was designed by cisco systems as a proprietary protocol, available only on cisco routers. Jun 09, 20 enhanced interior gateway routing protocol eigrp is another routing protocol in addition to rip and ospf. You can view a listing of available routers offerings that best meet your specific needs. There is interior gateway protocol igp than should be used for the routers in same domain network such as routing information protocol rip, enhanced interior gateway routing protocol eigrp, open shortest path first ospf and is. 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. This question was discussed recently on the cisco ccie routing and switching study group website. Routed protocols routed protocols are used to transport user traffic from source node to destination node. Learn eigrp terminology neighbor table, topology table, routing table, pdm, rtp, dual algorithm autonomous system and administrative distance step by step with examples. Cisco sr 500 series secure routers retirement notification.
Routing information protocols rip rip routing information protocol is a forceful protocol type used in local area network and wide area network. 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. Enhanced interior gateway routing protocol eigrp is an example of a balanced hybrid routing protocol. Igrp sends out periodic routing updates every 90 seconds. Eigrp cheat sheet successor primary route to a destination. Enhanced interior gateway routing protocol eigrp wide. Enhanced interior gateway routing protocol eigrp is an advanced distancevector routing protocol that is used on a computer network for automating routing decisions and configuration. Is eigrp a hybrid routing protocol or advanced distance. In this post i have gathered the most useful cisco asa firewall commands and created a cheat sheet list that you can download also as pdf at the end of the article.
Now have a look on the technology used in this routing protocol. In a well designed network, eigrp scales well and provides extremely quick convergence times with minimal network traffic. Eigrp general hybrid rputing protocol uses dual algorithm protocol independant classless routing protocol. The cisco sr 500 series secure routers has been retired and is no longer supported endofsale date. Apply bandwidth, routing, and security policies across a variety of mediums mpls, internet, or 3g4g lte with a single consistent, intuitive workflow softwaredefined wan is a new approach to network connectivity that lowers operational costs and improves resource usage for multisite deployments to use bandwidth more efficiently. Add one to the hop count for each advertised destination 2. Ciscos proprietary routing protocol eigrp is one of the two most widely employed routing protocols in the internet. Top 5 network routing protocols explained lifewire.
It would be scalable for any core backbone network to use eigrp as igp protocol for mpls labels switching since eigrp is the only protocol that maintains three tables neighbor, topology and routing. Routing info routing info routing computation is distributed among routers within a routing domain computation of best next hop based on routing information is the most cpumemory intensive task on a router routing messages are usually not routed, but exchanged via layer 2 between physically adjacent routers internal. Interior and exterior routing o an internet can be so large that one routing protocol cannot handle the task of updating routing table of all routers o thus, an internet is divided into autonomous systems as n as is a group of networks and routers under the authority of a single administration. Many software implementations exist for most of the common routing protocols. Dec 03, 2017 understand the basics of eigrp routing protocol with lab and packet captures. Configuring the enhanced interior gateway routing protocol variablelength subnet masking vlsm support eigrp is a classless routing protocol, which means that it advertises a subnet mask for each destination network.
Enhanced interior gateway routing protocol eigrp exterior gateway protocols. Where there are some dynamic routing protocol can be used to configuring routing tables in the router. It support for variable length subnet mask vlsm, it maintain three type of tables i. Enhanced interior gateway routing protocol wikipedia. Eigrp explained enhanced interior gateway routing protocol. Technology used in eigrp diffused update algorithm is similar to distance vector protocol. Eigrp converges very quickly, it takes about the same time or not less than ospf takes to converge, but without the negatives of ospf. It is a scalable routing protocol, even the largest eigrp installation in the world network is running successfully with no eigrp offset. What is the interior gateway routing protocol igrp. Before eigrp hit our scenes we had igrp, interior gatway routing protocol. For the distance vector type, eigrp enhanced interior gateway routing protocol will be used. 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.
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. Igrp interior gateway routing protocol igrp is a ciscoproprietary distancevector protocol, designed to be more scalable than rip, its standardized counterpart. Routing information protocol rip is a distancevector routing protocol used for both the tcpip and ipxspx protocol suites. Is eigrp a hybrid routing protocol or advanced distance vector routing protocol. It is also known as hybrid routing protocols that shares the attributes of both distance vector and link state.
Introduction to eigrpenhanced interior gateway routing protocol. Oct 09, 2014 interior gateway routing protocol igrp is a proprietary distance vector routing protocol used to communicate routing information within a host network. Eigrp is being considered as the more scalable protocol in both medium and large scale networks. Rip v2, eigrp, ospf, bgp v4, and isis routing protocols routing protocols job is to maintain routing tables and route packets appropriately. Comparison of rip, ospf and eigrp routing protocols based on.
Routing protocol classification both types of routing protocols have advantage and disadvantages. Igrp manages the flow of routing information within connected routers in the host network or autonomous system. Eigrp enhanced interior gateway routing protocol routing. 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. Hop count is the metric that rip uses and the hop limit limits the network size that rip can support. Nov 12, 2019 eigrp supports classless ip subnets and improves the efficiency of the routing algorithms compared to older igrp. 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. Originally created as a proprietary protocol runnable only on cisco family devices, eigrp was designed with the goals of easier configuration and better performance than ospf. How to configure ipv6 routing eigrp support enabling eigrp for ipv6 on an interface eigrpforipv6isdirectlyconfiguredontheinterfacesoverwhichitruns.
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