do you even have a Cisco OID to start with? something like 184.108.40.206.4.1.9.?.?
once you have that then you could go here and navigate to the MIB in the device tree for those items. http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en
especially to find the MIB/OID for 'Active Connections' or 'Dropped'.
I have found the following SNMP OID:
Average CPU utilization (5 minutes): .220.127.116.11.18.104.22.168.322.214.171.124.126.96.36.199
Total memory: .188.8.131.52.184.108.40.206.3220.127.116.11.18.104.22.168
Free memory: 22.214.171.124.126.96.36.199.3188.8.131.52.184.108.40.206
Relationship of contents (VIPs balanced): .220.127.116.11.18.104.22.168.322.214.171.124.1.2
Number of connections per contents (VIPs balanced): .126.96.36.199.188.8.131.52.3184.108.40.206.1.18
But I haven´t found the number of connections dropped in each context.