With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vsiLogicalIfSessionIndex
vsi Logical If Session Index
1.3.6.1.4.1.9.9.162.1.3.1.28
All logical interfaces are in the domain of a VSI slave, which communicates with the VSI master through a Session. This object is a selector for an entry in the table vsiSessionTable. It is the VSI session index for the VSI session which controls this logical interface.
Back to CISCO-VSIMASTER-MIB MIB page.
IPHost Network monitor allows you to monitor vsiLogicalIfSessionIndex 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.