With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
summaryLastSyncOut
summary Last Sync Out
1.3.6.1.4.1.3375.1.2.1.1.7.14
The value of summaryUpTime when the most recent outgoing sync was performed.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor summaryLastSyncOut 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.