With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdpCacheVersion
Cisco Discovery Protocol Cache Version
1.3.6.1.4.1.9.9.23.1.2.1.1.5
The Version string as reported in the most recent CDP message. The zero-length string indicates no Version field (TLV) was reported in the most recent CDP message.
Back to CISCO-CDP-MIB MIB page.
IPHost Network monitor allows you to monitor cdpCacheVersion 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.