3-13 RIP ConfigurationThe term router in this document refers to both routers and Layer 3 switches.This chapter includes these sections:z RIP Overviewz RIP Configuration Task Listz Configuring RIP Basic Functionsz Configuring RIP Route Controlz Configuring RIP Network Optimizationz Configuring Static Route FRRz Configuring BFD for RIPz Displaying and Maintaining RIPz RIP Configuration Examplesz Troubleshooting RIPRIP OverviewRIP is a simple Interior Gateway Protocol (IGP), mainly used in small-sized networks, such asacademic networks and simple LANs. RIP is not applicable to complex networks.RIP is still widely used in practical networking due to its easier implementation, configuration andmaintenance than OSPF and IS-IS.Operation of RIPIntroductionRIP is a distance vector routing protocol, using UDP packets to exchange information through port520.RIP uses a hop count to measure the distance to a destination. The hop count from a router to adirectly connected network is 0. The hop count from a router to a directly connected router is 1. To limitconvergence time, the range of RIP metric value is from 0 to 15. A metric value of 16 (or greater) isconsidered infinite, which means the destination network is unreachable. That is why RIP is notsuitable for large-scaled networks.RIP prevents routing loops by implementing the split horizon and poison reverse functions.
