Use the version 2 router configuration mode command to enable RIPv2, as shown in Figure 2. Notice how the show ip protocolscommand verifies that R2 is now configured to send and receive version 2 messages only. The RIP process now includes the subnet mask in all updates, making RIPv2 a classless routing protocol.
Note: Configuring version 1 enables RIPv1 only, while configuring no version returns the router to the default setting of sending version 1 updates but listening for version 1 or version 2 updates.
Figure 3 verifies that there are no RIP routes still in the routing table. This is because R1 is now only listening for RIPv2 updates. R2 and R3 are still sending RIPv1 updates. Therefore, theversion 2 command must be configured on all routers in the routing domain.
Use the Syntax Checker in Figure 4 to enable RIPv2 on R2 and R3.