With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgdTotalDomains
Cisco Global Server Load Balancer DNS Total Domains
1.3.6.1.4.1.9.9.595.1.3.1
This object specifies the total number of domains configured. The value of this object corresponds to the number of entries in the cgdDomainTable.
Back to CISCO-GSLB-DNS-MIB MIB page.
IPHost Network monitor allows you to monitor cgdTotalDomains 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.