With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
lbDomainPreferredResolves
lb Domain Preferred Resolves
1.3.6.1.4.1.3375.1.2.1.1.6.1.1.12
The number of times the domain has been resolved using the preferred mode.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor lbDomainPreferredResolves on F5 Network device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring F5 Network routers right now.