With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
lbDnsServIfDataTime
lb Dns Serv If Data Time
1.3.6.1.4.1.3375.1.2.1.1.5.2.1.8
The most recent date and time when data was transmitted through the interface.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor lbDnsServIfDataTime 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.