With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
summaryLastDump
summary Last Dump
1.3.6.1.4.1.3375.1.2.1.1.7.5
The value of summaryUpTime when the system was most recently commanded to dump its database, cache, and status information.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor summaryLastDump 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.