Cisco Cisco IOS Software Release 12.2(27)SBC

The following example configures a tunnel switch to select a tunnel destination based on the multihop 
hostname first, then on the domain name, and finally on the DNIS number:

vpdn search-order multihop-hostname domain dnis

multihop-hostname Enables the tunnel switch to initiate a tunnel based on the hostname or tunnel ID 

of the ingress tunnel.

Enables VPDN multihop.