With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoImageIndex
cisco Image Index
1.3.6.1.4.1.9.9.25.1.1.1.1
A sequence number for each string stored in the IOS image.
Back to CISCO-IMAGE-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoImageIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.