The router allows you to specify the RIP version that is sent to RIP neighbors and RIP updates that is accepted and processed. The router allows the following combinations:
Send only RIPv1 or send only RIPv2 to either the broadcast or multicast address or send no messages.
The default sends RIPv2 formatted messages to the broadcast address.
Receive only RIPv1, receive only RIPv2, or receive both RIPv1 and RIPv2, or receive none.
The default receives both.