With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
slbRealPort
slb Real Port
1.3.6.1.4.1.9.9.161.1.3.1.1.3
The TCP or UDP port of real server. This is used if SLB NAT is configured (see slbServerFarmNat). If SLB is not using NAT, this value will be 0.
Back to CISCO-SLB-MIB MIB page.
IPHost Network monitor allows you to monitor slbRealPort 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.