With IPHost Network Monitor you can run simple snmp requests against a F5 Network device in your network.
lbDomainPort
lb Domain Port
1.3.6.1.4.1.3375.1.2.1.1.6.1.1.3
The load-balanced domain's default service port number.
Back to F5-3DNS-MIB MIB page.
IPHost Network monitor allows you to monitor lbDomainPort 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.