With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
slbRealOperWeight
slb Real Operational Weight
1.3.6.1.4.1.9.9.161.1.3.1.1.9
The actual operating weight of the real server used by the load-balancing algorithms. This can be adjusted dynamically by DFP. A weight of zero indicates that no new connections will be assigned to this real server. Higher weight values indicate to the load-balancing algorithms a higher availability of this real server to accept more work.
Back to CISCO-SLB-MIB MIB page.
IPHost Network monitor allows you to monitor slbRealOperWeight 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.