Difference Between IGRP And EIGRP

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The Interior Gateway Routing Protocol (IGRP) and the Enhanced Interior Gateway Routing Protocol (EIGRP) are two of the most common routing protocols in use today. Both have their advantages and disadvantages, but there are some key differences between the two. IGRP is a proprietary protocol developed by Cisco, while EIGRP is an open standard. IGRP uses a simple distance vector algorithm, while EIGRP uses a more sophisticated hybrid algorithm.

What is IGRP ?

The Interior Gateway Routing Protocol (IGRP) is a dynamic routing protocol used to exchange routing information between gateways within an autonomous system. IGRP uses the Bellman-Ford algorithm to calculate the best route to each destination based on a number of factors, including hop count, link bandwidth, and link delay. IGRP is a Classless Inter-Domain Routing (CIDR) protocol, which means that it can support variable-length subnet masks (VLSMs).

IGRP was developed by Cisco Systems in the early 1980s and was the first routing protocol supported by Cisco routers. IGRP has since been replaced by newer protocols such as Enhanced Interior Gateway Routing Protocol (EIGRP) and Open Shortest Path First (OSPF).

What is EIGRP?

EIGRP is a Cisco proprietary protocol that uses the Diffusing Update Algorithm to send updates about routes between routers. The algorithm is designed to minimize the amount of bandwidth used and the number of resources needed to maintain route information.

EIGRP is a distance vector routing protocol, meaning it uses hop count as a metric to determine the best path between two devices. It can also use other factors, such as link bandwidth and link delay, but hop count is the default. EIGRP sends periodic updates about all routes it knows about to its neighbors. It only sends full updates when a change occurs, which conserves bandwidth.

EIGRP has two main benefits: fast convergence and low resource usage. Fast convergence means that if a link goes down, EIGRP will quickly find an alternate path and start using it.

Main differences between IGRP and EIGRP

There are a few key differences between IGRP and EIGRP. IGRP is a classful routing protocol, meaning that it does not support VLSM or CIDR. It also uses a Flat Metric, which means that all routes are given the same cost. This can be problematic if you have different types of media with different costs. EIGRP, on the other hand, is a classless routing protocol that does support VLSM and CIDR. Additionally, EIGRP uses a Composite Metric, which takes into account things like bandwidth and load when choosing the best route.

One of the biggest advantages of EIGRP over IGRP is its support for unequal-cost load balancing.

Similar Frequently Asked Questions (FAQ)

How do I configure IGRP or EIGRP on my router

There are two types of routing protocols that can be used on Cisco routers: IGRP and EIGRP. Both are capable of providing reliable routing information to devices on a network. However, there are some key differences between the two protocols.

IGRP is a classful routing protocol, which means that it does not support variable length subnet masks (VLSM). This can cause problems when trying to route traffic across different networks with different subnet masks. EIGRP, on the other hand, is a classless routing protocol and does support VLSM.

Another difference between IGRP and EIGRP is the way in which they handle updates. IGRP sends periodic updates every 90 seconds, regardless of whether or not there have been any changes to the network.

In conclusion,IGRP and EIGRP are two different protocols that are used in computer networking. IGRP is a distance-vector routing protocol while EIGRP is a link-state routing protocol. IGRP uses Bellman-Ford algorithm while EIGRP uses DUAL algorithm. IGRP sends updates every 90 seconds while EIGRP sends updates only when there is a change in the network. IGRP can be configured manually while EIGRP is automatically configured.