With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgdTotalSourceAddresses
Cisco Global Server Load Balancer DNS Total Source Addresses
1.3.6.1.4.1.9.9.595.1.3.3
This object specifies the total number of source addresses configured. The value of this object corresponds to the number of entries in the cgdSourceAddressTable.
Back to CISCO-GSLB-DNS-MIB MIB page.
IPHost Network monitor allows you to monitor cgdTotalSourceAddresses 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.