IGRP Interior Gateway Routing Protocol

IGRP Interior Gateway Routing Protocol

IGRP Interior Gateway Routing Protocol

IGRP is an advanced distance vector protocol developed by Cisco.

Characteristic of IGRP ( Interior Gateway Routing Protocol )

Increase scalability is improved for Routing in large size network compared to network that use in RIP.
Hops count IGRP has a default maximum hops count of 100, hops configure to the maximum of 255 hops.
Multiple path IGRP can maintain up to 6 equal part between network source and destination.

Here as number is autonomous number system it can be between 12655 3584 router needed in the share routing information this should belong to the same as IP Network in tonight’s class network number.
Unique number identifying the routing domain of the router range from
A autonomous system number is a collection of network and the second administrative domain

Two main purposes of IGRP are:

1) Its Communicate routing information to all connected routers within its boundary or autonomous system.
2) It will update if ever topology of network changed.

In every 90 seconds it send notification of new changes to its neighbors.

Interior Gateway Routing Protocol (IGRP)

IGRP Interior Gateway Routing Protocol

considering we have configure Hostname and IP address in Router01,Router03,Router03
Please refer how to configure Hostname and IP address in Router01,Router03,Router03 by clicking here.

Interior Gateway Routing Protocol (IGRP) configuration in Router01

Interior Gateway Routing Protocol (IGRP) configuration in Router02

Interior Gateway Routing Protocol (IGRP) configuration in Router03

How to view the routing table in Router01

How to view the routing table in Router02

How to view the routing table in Router03

Verify the connectivity between networks using the ping command

To verify the Interior Gateway Routing Protocol (IGRP) routes and the connectivity between networks, run the ping command from Host01 (IP address: 172.16.0.10/16) to Host03 (IP address: 172.20.0.10/16).

The ping reply from Host03 (IP address: 172.20.0.10/16) shows that the Interior Gateway Routing Protocol (IGRP) is configured well in three routers and there is network connectivity between different networks.

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