Cisco RIP v1 IP Routing

RIPv1-1

RouterA(config)#router rip
RouterA(config-router)#network 192.168.10.0
RouterA(config-router)#network 195.14.25.0
RouterA(config-router)#network 195.14.125.0

RouterB(config)#router rip
RouterB(config-router)#network 192.168.20.0
RouterB(config-router)#network 195.14.25.0
RouterB(config-router)#network 195.14.125.0

RouterC(config)#router rip
RouterC(config-router)#network 192.168.30.0
RouterC(config-router)#network 195.14.25.0

References :

http://blog.pluralsight.com/cisco-how-to-configure-rip-1