| Overview

Dynamic routing protocols can help simplify the life of a network administrator. Dynamic routing makes it possible to avoid the time-consuming and exacting process of configuring static routes. Dynamic routing also makes it possible for routers to react to changes in the network and to adjust their routing tables accordingly, without the intervention of the network administrator. However, dynamic routing can cause problems. Some of the problems associated with dynamic distance vector routing protocols are discussed in this module, along with some of the steps that designers of the protocols have taken to solve the problems. Routing Information Protocol (RIP) is a distance vector routing protocol that is used in thousands of networks throughout the world. The fact that RIP is based on open standards and is very simple to implement makes it attractive to some network administrators, although RIP lacks the power and features of more advanced routing protocols. Because of its simplicity, RIP is a good beginning protocol for the networking student. This module also introduce RIP configuration and troubleshooting. Like RIP, Interior Gateway Routing Protocol (IGRP) is a distance vector routing protocol. Unlike RIP, IGRP is a Cisco-proprietary protocol rather than a standards-based protocol. While remaining very simple to implement, IGRP is a more complex routing protocol than RIP and it is able to use a number of factors to determine the best route to a destination network. This module will introduce IGRP configuration and troubleshooting. Students completing this module should be able to: Describe how routing loops can occur in distance vector routing Describe several methods used by distance vector routing protocols to ensure that routing information is accurate Configure RIP Use the ip classless command Troubleshoot RIP Configure RIP for load balancing Configure static routes for RIP Verify RIP Configure IGRP Verify IGRP operation Troubleshoot IGRP