With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoSystemExtInfoGroupOptional
cisco System Ext Info Group Optional
1.3.6.1.4.1.9.9.305.2.2.6
A collection of objects for system information which are optional.
Back to CISCO-SYSTEM-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoSystemExtInfoGroupOptional 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.