With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmedxOverloadContributorCounts
cmedx Overload Contributor Counts
1.3.6.1.4.1.9.10.104.1.2.8.1.5
The accumulated number of times the CAC monitoring resource causes the gateway entering the overload condition since the last counter reset.
Back to CISCO-MEGACO-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cmedxOverloadContributorCounts 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.