With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpmCPULoadAvg15min
Cisco Process Monitor CPU Load Avg15min
1.3.6.1.4.1.9.9.109.1.1.1.1.26
The overall CPU load Average in the last 15 minutes period
Back to CISCO-PROCESS-MIB MIB page.
IPHost Network monitor allows you to monitor cpmCPULoadAvg15min 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.