With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cltcDot1qTunnelMode
cltc Dot1q Tunnel Mode
1.3.6.1.4.1.9.9.246.1.2.1.1.1
Indicates the dot1q tunnel mode of the interface. Setting the interface to dot1q tunnel 'disabled' mode causes the dot1q tunnel feature to be disabled on this interface. Setting the interface to dot1q tunnel 'enabled' mode causes the dot1q tunnel feature to be enabled on this interface.
Back to CISCO-L2-TUNNEL-CONFIG-MIB MIB page.
IPHost Network monitor allows you to monitor cltcDot1qTunnelMode 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.