With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
trapDestProtocol
trap Destination Protocol
1.3.6.1.2.1.16.19.13.1.3
The protocol with which to send this trap.
Back to RMON2-MIB MIB page.
IPHost Network monitor allows you to monitor trapDestProtocol 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.