With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c2900PortMonitoredPortMap
Cisco 2900 Port Monitored Port Map
1.3.6.1.4.1.9.9.87.1.4.1.1.30
Indicates which ports are actually being monitored. The octet string contains one bit per port. Each bit within the octet string represents one port of the device. The ordering of ports represented within the octet string is in the same order as in the RFC 1493 dot1dStaticAllowedToGoTo in the dot1dStaticTable. The bit value interpretation is as follows: 1 = being monitored 0 = not being monitored
Back to CISCO-C2900-MIB MIB page.
IPHost Network monitor allows you to monitor c2900PortMonitoredPortMap on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.