With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vlanTrunkMappingStatus
vlan Trunk Mapping Status
1.3.6.1.4.1.9.5.1.9.8.1.5
Once a row becomes active, value in any other column within such row cannot be modified except by setting vlanTrunkMappingStatus to notInService(2) for such row.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor vlanTrunkMappingStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
