With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgdDnsUnmatchedQueries
Cisco Global Server Load Balancer DNS Dns Unmatched Queries
1.3.6.1.4.1.9.9.595.1.4.3
This object specifies the number of DNS queries received for which no answer could be found.
Back to CISCO-GSLB-DNS-MIB MIB page.
IPHost Network monitor allows you to monitor cgdDnsUnmatchedQueries on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.