RIP - enabling unicast-only updates

Unlike OSPF, configuring the neighbor statement in RIP doesn't stop the transmission of broadcast/multicast (RIPv1 and RIPv2 respectively) update packets. Instead, it just sends an additional unicast update for the statically configured neighbors. In order to stop the transmission of broadcast/multicast updates and only send unicast updates you have to use the passive-interface command alone with the neighbor command. (IE)