With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
summaryUpTime
summary Up Time
1.3.6.1.4.1.3375.1.2.1.1.7.2
The elapsed time since the system was last initialized.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor summaryUpTime 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.