1020 Configuring RIPWhat Is Split Horizon?RIP uses a technique called split horizon to avoid problems caused byincluding routes in updates sent to the router from which the route wasoriginally learned. With simple split horizon, a route is not included inupdates sent on the interface on which it was learned. In split horizon withpoison reverse, a route is included in updates sent on the interface where itwas learned, but the metric is set to infinity.What RIP Versions Are Supported?There are two versions of RIP:• RIP-1 defined in RFC 1058– Routes are specified by IP destination network and hop count– The routing table is broadcast to all stations on the attached network• RIP-2 defined in RFC 1723– Route specification is extended to include subnet mask and gateway– The routing table is sent to a multicast address, reducing networktraffic– An authentication method is used for securityThe PowerConnect 7000 Series switches support both versions of RIP. Youmay configure a given port:• To receive packets in either or both formats• To transmit packets formatted for RIP-1 or RIP-2 or to send RIP-2 packetsto the RIP-1 broadcast address• To prevent any RIP packets from being received• To prevent any RIP packets from being transmitted
