How does health monitor works

[f5mkuDefault]

hi experts,

Just want to confirm,

supposed the health monitor has interval of 5 secs and time out at 16sec - DEFAULT settings.

Does this mean that even if the pool member is down for let say 1 seconds, F5 won't mark it down?

F5 will only mark it down after 16 seconds.

Is this correct?

TIA

[Daniel_Wolf]

Hi Tia,

the F5 will check every 5 seconds. After 16 seconds, if it has three consecutive failed checks (5 sec+5sec+5sec+1sec), it will mark the pool member down. It's basically three checks plus 1 second.

This way the F5 can send three health checks and it provides a reasonable amount of time to for the pool member to reply.

KR

Daniel

[f5mkuDefault]

Hi Daniel, this means that if the server went unreachable for 3 seconds, f5 will not mark it RED. Correct?

[Daniel_Wolf]

Correct. It will mark it red after 16 seconds of being unreachable.

[f5mkuDefault]

Thanks a lot Daniel.