By default, dedicated tunnel-server ports are configured to have the maximum number of tunnel-service interfaces that the dedicated tunnel-server module supports. You can reduce the maximum number of interfaces or completely unprovision the port by issuing the max-interfaces command.
By default, shared tunnel-server ports are configured to have no tunnel-service interfaces. To provision tunnel-service interfaces on shared tunnel-server ports, you must provision the port by assigning a nonzero maximum number of tunnel-service interfaces to run on the port by issuing the max-interfaces command.