With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
lbRouterIfPathSentTime
lb Router If Path Sent Time
1.3.6.1.4.1.3375.1.2.1.1.3.2.1.10
The date and time when path data corresponding to the interface was most recently sent.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor lbRouterIfPathSentTime 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 switches right now.