Displays the destination NE NSAP address. The NSAP Selector (last two NSAP
characters) must be 2f (GRE tunnel), or cc (proprietary Cisco tunnel), depending on which tunnel type you want to create. The Cisco proprietary tunnel is slightly more efficient than the GRE tunnel because it does not add an encapsulation header for each IP packet, while GRE adds a small header to the packets. The two tunnel types are not compatible. Most Cisco routers support the Cisco tunnel, while only a few support both GRE and Cisco IP tunnels. You generally will create Cisco IP tunnels if you're tunneling between two Cisco routers or between a Cisco router and an ONS node.