Router_A#debug ip rip
RIP protocol debugging is on
Router_A#
01:28:13: RIP: sending v2 update to 224.0.0.9 via Ethernet0/0 (172.16.0.1)
01:28:13: 172.17.0.0/16 -> 0.0.0.0, metric 1, tag 0
01:28:13: 172.18.0.0/16 -> 0.0.0.0, metric 2, tag 0
01:28:13: RIP: sending v2 update to 224.0.0.9 via Serial0/0 (172.17.0.1)
01:28:13: 172.16.0.0/16 -> 0.0.0.0, metric 1, tag 0
01:28:18: RIP: received packet with MD5 authentication
01:28:18: RIP: received v2 update from 172.17.0.2 on Serial0/0
01:28:18: 172.18.0.0/16 -> 0.0.0.0 in 1 hops