With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dlswNodeVersionString
dlsw Node Version String
1.3.6.1.4.1.2011.2.34.1.3
This string gives product-specific information about this DLSw (e.g., product name, code release and fix level). This flows in Capabilities Exchange messages.
Back to DLSW-MIB MIB page.
IPHost Network monitor allows you to monitor dlswNodeVersionString 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.