With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cslbxDnsProbeIpEntry
Cisco SLB Health Monitor Dns Probe Ip Entry
1.3.6.1.4.1.9.9.254.1.6.2.1
The IP address in this entry is a valid response to a request for resolution of the domain name associated with the DNS probe in this entry.
Back to CISCO-SLB-HEALTH-MON-MIB MIB page.
IPHost Network monitor allows you to monitor cslbxDnsProbeIpEntry 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.