With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
portCpbTrunkEncapsulationType
port Cpb Trunk Encapsulation Type
1.3.6.1.4.1.9.5.1.19.1.1.5
port, The dot10(1) is for 801.10 and dot1q(2) is for 801.1Q.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor portCpbTrunkEncapsulationType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.