With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoSnapshotActivityIndex
cisco Snapshot Activity Index
1.3.6.1.4.1.9.9.19.1.3.1.1
An index value that uniquely identifies a Snapshot Activity Entry on a given interface.
Back to CISCO-SNAPSHOT-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoSnapshotActivityIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.