With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
agentTotalMemory
agent Total Memory
1.3.6.1.4.1.14179.1.1.5.2
Total RAM of the switch in Kbytes.
Back to AIRESPACE-SWITCHING-MIB MIB page.
IPHost Network monitor allows you to monitor agentTotalMemory on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.