Hi,

yes, if you want the port to stop sending DTP frames, use switchport nonegotiate command.

See

"If you enter access mode, the interface goes into permanent nontrunking mode and negotiates to convert the link into a nontrunk link even if the neighboring interface does not agree to the change.

If you enter trunk mode, the interface goes into permanent trunking mode and negotiates to convert the link into a trunk link even if the neighboring interface does not agree to the change."

"When you are using the nonegotiate keyword, DISL/DTP negotiation packets will not be sent on the interface. The device will trunk or not trunk according to the mode parameter given: access or trunk. "

in http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.1/20ew/command/reference/snmp_vtp.html#wp1114663

HTH,

Milan