With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vlanTrunkPortTable
vlan Trunk Port Table
1.3.6.1.4.1.9.9.46.1.6.1
The table containing information on the local system's VLAN trunk ports.
Back to CISCO-VTP-MIB MIB page.
IPHost Network monitor allows you to monitor vlanTrunkPortTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.