Ccnp route chapter 2 lab 24, named eigrp configuration. Eigrp chapter configuration, 2 lab 22, bandwidth eigrp and load. Ensure that any interface not participating in the eigrp domain will not accept or send eigrp updates. Use the download button below or simple online reader. For example a router with an eigrp as of 1 and another with an. All ip routing protocols on cisco routers can perform equalcost load balancing. Even better it will share traffic in a proportional way, if you have a feasible successor that has a feasible distance which is 5 times worse than the successor then traffic will be shared in a 5.
Eigrp supports unequal metric load balancing, which allows administrators to better distribute traffic flow in their networks. Router used as a frame reay switch lab 25, eigrp authentication and. At the end of the previous eigrp tutorial, we noticed that only r1 has an entry for both loopbacks in its routing table. Enhanced interior gateway routing protocol nanopdf. Jun 06, 2014 recently, i was asked a question regarding traffic load balancing across several links and i was able to provide two options that i thought would work. Configuring advanced eigrp routing lab continued eigrp objectives. Nov 06, 2016 equal cost load balancing with rip on packet tracer. Have you ever wondered why among all igps only eigrp supports unequalcost load balancing uclb. Topology r1 is the router we will be doing our tests from. Eigrp uses diffusing update algorithm dual to choose the best path from the source to the destination. It is also important to note that cisco ios release 12. As you may know, people have search numerous times for their favorite novels like this lab 2 1 eigrp configuration bandwidth and adjacencies, but end up in malicious downloads.
The purpose of this lab is to explore the functionality of the eigrp routing protocol. I have decided to create articles on those solutions. During the last decades people have become witnesses to the rapid expansion of data networks. Eigrp sample ccna lab to enable eigrp on a router you use its router command router eigrp. I have three router going to same site, eigrp running. In this post i would like to explore unequal cost load balancing with eigrp and particularly how we configure eigrp in order to achieve load balancing. In this way, eigrp provides both unequal cost path load balancing and intelligent load balancing. Eigrp also supports load balancing across routes with an unequal metric. Advantages of eigrp uses multicast instead of broadcast utilizes link bandwidth and delay eigrp metric igrp metric x 256 32 bit vs.
Eigrp stands for enhanced interior gateway routing protocol and is a routing protocol created by cisco. Eigrp equal and unequal cost load sharing eric leahy. Equal cost load balancing with rip on packet tracer. Configure the network above with eigrp using autonomous system number 90. A path has to be a feasible successor route to be used in unequal load balancing. Eigrp uses diffusing update algorithm dual to determine the best path among all feasible paths.
We often come across the requirement where we have to perform the load sharing in dualhomed network scenario. This unique feature on eigrp is called unequal cost load balancing and its very easy to be implemented. Both eigrp for ipv4 and eigrp for ipv6 support unequal cost load balancing. After overview of eigrp, it is time to take a look at eigrp configuration. Aug 14, 2015 cisco ccnp route lab 21 for the 300101 exam. In this lab we will configure rip and will observe load balancing with equal.
Use show and debug commands for the eigrp topology table. In this lab you will learn how to statically set the maximum paths that eigrp. Jun, 20 now lets configure unequalcost load balancing to make use of the link via e10. We can verify this by looking at the output of show ip protocols, it will tell us what the maximum path value is. Dec, 2011 in this lab i will explore equal and unequalcost load balancing for eigrp and will explain how eigrp calculates its metric values. Advertise all networks into eigrp, including your loopback interfaces. How to configure eigrp variance to load balance traffic across unequal cost links. Eigrp configuration is really awesome and not so hard if you compare with ospf or etc. If youve completed lab 85 configuring eigrp timers, then youll notice on r1 if you view the routing table that the router is load sharing to the 10. Eigrp for ipv6 supports unequal cost load balancing, but eigrp for ipv4 does not. Eigrp equalcost load balancing equalcost load balancing is a routers capability to distribute traffic over all the routers that have the same metric for the destination address. It will connect through r2 and r3 to ip address 124.
By default, eigrp will automatically load balance across equalmetric routes four by default, six maximum. Step by step eigrp configuration example networkel. Eigrp introduced significant improvements to the igrp routing protocol including support for vlsm and cidr, guaranteed loop free routes, and faster convergence times. Eigrp overview enhanced interior gateway routing protocol or eigrp is ciscos proprietary distance vector routing protocol that replaced the earlier igrp routing protocol.
The degree to which eigrp performs load balancing is controlled with the variance command. As with autosummarization, the router performing manual summarization will add the. If you are interested in full course enjoy it with 60% discount via the following link. Eigrp adheres to the following hybrid characteristics. Total delay from path using jackie is 900 multiply that times 5 and the total delay for the other path needs to be 4500. Configure eigrp stub routing, summarization, and default routing. Eigrp configuration, bandwidth and adjacencies chapter 2. Lab 2 1 eigrp configuration bandwidth and adjacencies. Ccnp route lab 22, eigrp load balancing config router. By default, eigrp supports equalcost load balancing over four links.
Lab configuring basic eigrp for ipv4 routing protocol is eigrp 10. By setting the variance to 10 we are telling the router to load balance over routes that have an fd of up to 10 times worse than the fd of the successor route. This is why the ip cef option is turned off on the router r7. Recently, i was asked a question regarding traffic load balancing across several links and i was able to provide two options that i thought would work. Pdf simulationbased comparative study of ospf and eigrp. Refer to the load balancing section of enhanced interior gateway routing protocol for more information on how eigrp load balances traffic over unequal cost links. Jun 03, 2009 in this situation, eigrp sends two packets to eca and one packet to eba. Configuring eigrp maximum paths free ccna workbook. Eigrp can also balance traffic across multiple routes that have different metrics, which is called unequalcost load balancing.
Eigrp by default load balances using 4 routes with identical metrics however. Enarsi implementing cisco enterprise advanced routing and. How does unequal cost path load balancing variance work. In this lab, you will configure named eigrp for ipv4 and ipv6. Lets take a look at an example of how eigrp can do load balancing. Are there any routes that dont meet the feasability condition.
Both paths have an equal cost, so the metrics must be modified to stop eigrp from load balancing as shown below. How does unequal cost path load balancing variance work in. To better understand the equalcost load balancing concept, consider the following example. Feb 19, 2020 eigrp can also balance traffic across multiple routes that have different metrics, which is called unequalcost load balancing. Pdf lab 2 1 eigrp configuration bandwidth and adjacencies thank you very much for reading lab 2 1 eigrp configuration bandwidth and adjacencies. We must use the variance command to tell eigrp to load balance across unequalmetric links.
Ccnp route lab manual with solutions config router. In the following table are all devices with their interfaces and ip addresses. For equal cost load balancing allboth routes have a metric of 1. Configure and verify equalcost load balancing with eigrp. Named eigrp uses the address family af feature to unify the configuration process when implementing both ipv4 and ipv6. Chapter 2 lab 22, eigrp load balancing topology objectives. Load balancing with eigrp all of our interior gateway protocols can perform equalpath load balancing on up to 4 routes by default. Sep 19, 2011 eigrp makes it easy for us the network engineers to make this happen. Now lets configure unequalcost load balancing to make use of the link via e10. Ccnp route lab manual with solutions chapter 1 lab 11, tci script reference and demonstration chapter 2 lab 21, eigrp configuration, bandwidth, and adjacencies lab 22, eigrp load balancing lab 23, eigrp summarization and default network advertisement lab 24, eigrp frame relay hubandspoke.
In this 1st article, we will consider the first solution. Eigrp enhanced interior gateway routing protocol eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of both distancevector and linkstate routing protocols. Eigrp for ipv4 supports unequal cost load balancing, but eigrp for ipv6 does not. Equalcost means that multiple routes must have the same metric to reach the destination, so that router can choose to load balance across equal cost links. Is there any special reason why only eigrp supports this feature. Eigrp automatically does equal cost load balancing r1 has two.
In this scenario, the topology and ip addressing is as shown in figure below and the routing protocol has been configured using eigrp with as number 99. Configure eigrp on all routers using the autonomous system numbers as diagrammed. The eigrp supports multiple routed protocols, including ipx, appletalk and ip. May 11, 2011 eigrp equalcost load balancing equalcost load balancing is a routers capability to distribute traffic over all the routers that have the same metric for the destination address. Follow along with our experts as we configure and troubleshoot all of the ccnplevel services and protocols. May 15, 2019 each process is configured separately, router eigrp asnumber for ipv4 and ipv6 router eigrp asnumber for ipv6. Configure and verify unequalcost load balancing with eigrp. New ways of working, communicating and socializing have been accompanied by new terms such as bring your own device byod, the internet of things and. Eigrp requires an autonomous system number because that is how it determines what routers belong to the same eigrp routing domain. Before jumping in the ins and out lets run through a few things first when it comes to eigrp load sharing, also refereed to as load balancing sometimes. In this lab i will explore equal and unequalcost loadbalancing for eigrp and will explain how eigrp calculates its metric values.
Load balancing with eigrp routing table cisco certified. Now its time to do a little unequalcost balancing, using this network. Hi there, i have a question on how to check on how to load balancing works on eigrp. In this lab you will learn how to statically set the maximum paths that eigrp can use for ip route based load sharing. In this lab, well go over eigrp unequalcost load balancing theory, and then put that theory into action in a lab with live. Read more rip equal cost load balancing on packet tracer. Eigrp unequal cost load balancing trafficengineering. Right now, were going to do the same for load balancing and take a firsthand look at what happens when a successor suddenly leaves the eigrp routing table.
Both spokes can see r1s loopback, but neither r2 nor r3 has an entry for the others loopback. Today i will show how to configure ospf load balancing, if we follow bellow example we see a client is connected through two wan connections with two broadband routers that both are use for internet routing. Eigrp enhanced interior gateway routing protocol is an enhanced distancevector protocol. Rip routing information protocol automatically performs equal cost load balancing. In these video tutorial i can explain how to configure eigrp unequal cost load balancing in step by step manner. Ccnp route chapter 2 lab 21, eigrp load balancing version 7. Administrative distance 90 internal, when routers are connected in the same autonomous system, 170 external, when routers are connected in different autonomous system. The second item in the list requires that traffic is not load balanced from routerd to routera and routere. Eigrp is a ciscoproprietary hybrid routing protocol, incorporating features of. We will enable and disable ospf load balancing packets that are sourcing from the host to the web server. How does unequal cost path load balancing variance. Study plan cisco ccnp routingswitching 300101 route. Cisco ios software supports equal cost load sharing for a default of up to four paths for all routing protocols. Neither eigrp for ipv4 nor eigrp for ipv6 support unequal cost load balancing.
In a framerelay environment, spoke routers can be configured as eigrp stubs variance 1 in eigrp means unequal load balancing is disabled,it supportequalcost load balancing in eigrp, if the multipoint network has different speeds allocated to the vcs,take the lowest cir and simply multiply it by the number of circuits. Eigrp is a ciscoproprietary routing protocol that is based on igrp. Dec 12, 2015 7225 lab configuring basic eigrp for ipv4 ilm. The second part deals with advanced eigrp configuration commands, including load balancing with variance command, manipulation bandwidth within eigrp, and then how to configure it to use the wildcard mask. Configure load balancing on cisco eigrp mustbegeek. Identify successors, feasible successors, and feasible distances. Eigrp is called a hybrid or advanced distance vector protocol and most of the rules that apply to rip also apply here. Developing computer network based on eigrp performance comparison and ospf. Rip equal cost load balancing on packet tracer networking. Eigrp automatically does equal cost load balancing r1 has two ways to reach the. Developing computer network based on eigrp performance. Lets issue the show ip eigrp topology alllinks command and see. Eigrp configuration, bandwidth and adjacencies chapter 2 lab. All these routes are in the routing table by default, load balancing as they are equal metric routes.
Page 1 ccie routing and switching lab exam version 5. The routing table will show that r1 will load balance traffic over both paths. Configure load balancing on cisco eigrp using unequal routes. Eigrp automatically does equal cost load balancing step 3 examine the eigrp from cisco cs50c at foothill college. Originally, it was only available on cisco hardware but since a few years, its now an open standard. This video is one of my full eigrp course in udemy. I will talk about the feasible distance, the metric weights, offsetlist, the different methods we can use to change traffic sharing among multiple unequal cost paths with eigrp and. We covered split horizon in depth in the previous installment of this eigrp tutorial series. In this situation, eigrp sends two packets to eca and one packet to eba. The multiplier parameter for the variance command is a value from 1 to 128, used for load balancing. Lets take a look to figure below and configure this topology via eigrp step by step. Configure and verify eigrp stubs, eigrp load balancing and eigrp neighbor relationship and authentication. Eigrp automatically does equal cost load balancing step 3.
Mar 26, 2017 understanding basics of eigrp routing protocol features of eigrp. Aug 12, 2012 in this post i would like to explore unequal cost load balancing with eigrp and particularly how we configure eigrp in order to achieve load balancing. This article demonstrates the traffic engineering with eigrp using unequal cost load balancing where one path requires more traffic share than the other. Ccnp route chapter 2 lab 21, eigrp load balancing version 7 may 22, 2019 last updated on.
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