With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c2900PortIfIndex
Cisco 2900 Port If Index
1.3.6.1.4.1.9.9.87.1.4.1.1.25
The value of the instance of the ifIndex object, defined in MIB-II, for the interface corresponding to this port.
Back to CISCO-C2900-MIB MIB page.
IPHost Network monitor allows you to monitor c2900PortIfIndex 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.