Ahhh só completando, aqui segue os outputs do database do rip e o teste de icmp:
RA#sh ip rip database
200.30.6.0/24 auto-summary
200.30.6.0/30 directly connected, Serial1/0
200.30.6.4/30
[1] via 200.30.6.2, 00:00:01, Serial1/0
200.30.6.8/30 directly connected, FastEthernet0/0
RA#ping 200.30.6.5 source fastEthernet 0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 200.30.6.5, timeout is 2 seconds:
Packet sent with a source address of 200.30.6.9
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/61/108 ms
RB#sh ip rip database
200.30.6.0/24 auto-summary
200.30.6.0/30 directly connected, Serial1/0
200.30.6.4/30 directly connected, FastEthernet0/0
200.30.6.8/30
[1] via 200.30.6.1, 00:00:11, Serial1/0
RB#ping 200.30.6.9 source fastEthernet 0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 200.30.6.9, timeout is 2 seconds:
Packet sent with a source address of 200.30.6.5
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/59/160 ms