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Forum Discussion

AlejandroCA_370's avatar
AlejandroCA_370
Icon for Nimbostratus rankNimbostratus
Aug 28, 2018

Functions of 'Service Port' and 'Health Monitor'?

Hello,   Sometimes I misunderstand the exact difference between the service port and the Health Monitor port.   What does exactly do each of them?   Thank you,   Regards.  
application delivery
BIG-IP
BIG-IP DNS
rob_carr's avatar
rob_carr
Icon for Cirrocumulus rankCirrocumulus
Aug 29, 2018

Service Port, when adding a pool member, defines the destination port the BIG-IP will attempt to connect to when creating a server-side connection.

 

Alias Service Port, which is a monitor setting, is used to configure the destination port of monitor connections.

 

Most often, the Alias Service Port is left at '*', which in natural language translates to 'use the port specified in the Service Port for the pool member'.

 

If however there is a dependency that needs to be recognized or a dashboard service that needs to be checked for availability, the Alias Service Port can be explicitly specified and the Service Port of the pool member will not be used when making monitor connections.