I want to take stats between two devices connected through a SP MPLS nw. As I select them as src and target and DefaultVPN as operations, I get an error "CHECK IF RTR RESPONDER IS ENABLED ON TARGET". I have configured "rtr responder" command in the target Cisco 2970 with IOS > 12.2. The SRC device is core switch Cisco 4948 IOS> 12.2. It shows status of "Default IP echo" between them but not letting configure "default VPN". Can anyone please suggest on this.