With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
lbDnsServTable
lb Dns Serv Table
1.3.6.1.4.1.3375.1.2.1.1.5.1
Information about the load-balancing DNS servers.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor lbDnsServTable 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.