With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cshMonProbeTotalConnectionErrors
csh Monitoring Probe Total Connection Errors
1.3.6.1.4.1.9.9.508.1.1.2.1.3
This object identifies the number of probes that received connection errors while trying to connect to the real server.
Back to CISCO-SLB-HEALTH-MON-MIB MIB page.
IPHost Network monitor allows you to monitor cshMonProbeTotalConnectionErrors 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.