With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c2900PortMonitorDestinationPort
Cisco 2900 Port Monitor Destination Port
1.3.6.1.4.1.9.9.87.1.4.1.1.28
Switch Port (c2900PortSwitchPortIndex) index value of the port that is to be monitored by this port. A value of zero can't be used to do set, it is used to return when this object is read. To remove a port from the monitored list use the object c2900PortNoMonitorDestinationPort.
Back to CISCO-C2900-MIB MIB page.
IPHost Network monitor allows you to monitor c2900PortMonitorDestinationPort on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.