With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c2900PortSwitchPortIndex
Cisco 2900 Port Switch Port Index
1.3.6.1.4.1.9.9.87.1.4.1.1.29
Switch port index of a port is a value that uniquely identifies the port within a switch. This is obtained from the port index (c2900PortIndex) and the module index (c2900PortModuleIndex).
Back to CISCO-C2900-MIB MIB page.
IPHost Network monitor allows you to monitor c2900PortSwitchPortIndex 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.