How can I determine which version of the RIP protocol I am using?

Use either of these 2 commands to display which versions of RIP your RIP interfaces are using:

• DISPLAY TCPIP,tcpipjobname,OMPROUTE,RIP,LIST,ALL

• DISPLAY TCPIP,tcpipjobname,OMPROUTE,RIP,LIST,INTERFACES

Here is an example of output from the DISPLAY TCIP,tcpipjobname,OMPROUTE,RIP,LIST,INTERFACES command showing that all RIP interfaces are configured to send RIP version 1 packets:

 EZZ7843I RIP CONFIGURATION 447
      TRACE: 1, DEBUG: 0, SADEBUG LEVEL: 0
      STACK AFFINITY: TCPCS6
      RIP: ENABLED
      RIP DEFAULT ORIGINATION: ALWAYS, COST = 1
      PER-INTERFACE ADDRESS FLAGS:
      CTC2             9.167.100.13    RIP VERSION 1
                                       SEND NET AND SUBNET ROUTES
                                       RECEIVE NO DYNAMIC HOST ROUTES
                                       RIP INTERFACE INPUT METRIC: 1
                                       RIP INTERFACE OUTPUT METRIC: 0
                                       RIP RECEIVE CONTROL: ANY
      CTC1             9.168.100.3     RIP VERSION 1
                                       SEND NET AND SUBNET ROUTES
                                       RECEIVE NO DYNAMIC HOST ROUTES
                                       RIP INTERFACE INPUT METRIC: 1
                                       RIP INTERFACE OUTPUT METRIC: 0
                                       RIP RECEIVE CONTROL: ANY

In addition, the DISPLAY TCPIP,tcpipjobname,OMPROUTE,RIP,INTERFACE,NAME=if-name command can be used to display the RIP version used by the specific RIP interface named in the command.