With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
slbRealTotalConnections
slb Real Total Connections
1.3.6.1.4.1.9.9.161.1.3.1.1.18
The number of assigned connections handled by this real server since this server was configured.
Back to CISCO-SLB-MIB MIB page.
IPHost Network monitor allows you to monitor slbRealTotalConnections on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.