A most difference of exchanging routes between RIP v1 and V2
 

According to the topology above, configure BB1 and R1 to exchange RIP routes via unicast.

Knowledge Points
 

RIP V2 supports exchanging route using unicast ( by default, RIPv1 uses broadcast and RIPv2 uses multicast).

To enable the unicast update, do the followings:

• (config-router)#passive-interface Interface_name

Set the specified interface to the passive mode. It would only receive the route information, but not send.

• (config-router)#neighbor IP_address

Specify a neighbor to exchange the route information using unicast.
In this case, set BB1’s E0/0 and R1’s E1/1 to the passive mode, so they will not send the RIP information out by broadcast. Then enable the unicast update to exchange the route information.

In this case, set BB1’s E0/0 and R1’s E1/1 to the passive mode, so they will not send the RIP information out by broadcast. Then enable the unicast update to exchange the route information.