Using the ping command from the R3 router, you can confirm that hosts on remote networks can be reached. In this case we ping an IP address on R1.
ping 10.0.20.1 shows how to ping an IP address on the R1 router.
vyatta@R3:~$ ping 10.0.20.1 PING 10.0.20.1 (10.0.20.1) 56(84) bytes of data. 64 bytes from 10.0.20.1: icmp_seq=1 ttl=63 time=7.39 ms 64 bytes from 10.0.20.1: icmp_seq=2 ttl=63 time=1.56 ms 64 bytes from 10.0.20.1: icmp_seq=3 ttl=63 time=1.49 ms ^C --- 10.0.20.1 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 1.497/3.482/7.390/2.763 ms vyatta@R3:~$
This output confirms that the RIP configuration is working and that a remote network can be reached.