With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdpCachePlatform
Cisco Discovery Protocol Cache Platform
1.3.6.1.4.1.9.9.23.1.2.1.1.8
The Device's Hardware Platform as reported in the most recent CDP message. The zero-length string indicates that no Platform field (TLV) was reported in the most recent CDP message.
Back to CISCO-CDP-MIB MIB page.
IPHost Network monitor allows you to monitor cdpCachePlatform 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.