Hello Christopher,
The command reference at
http://www.cisco.com/en/US/docs/ios-xml/ios/interface/command/ir-t2.html#wp4269279348
says: "Terminates any number of IP-in-IP tunnels at one tunnel interface. This tunnel will not carry any outbound traffic; however, any number of remote tunnel endpoints can use a tunnel configured this way as their destination."
Honestly, though, I can not think of an application I would use this argument in. I will try looking for something and if I find something, I will post it here.
Best regards,
Peter
