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f5mkuDefault's avatar
f5mkuDefault
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Jun 02, 2021

How does health monitor works

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 fo...
application delivery
BIG-IP
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Daniel_Wolf's avatar
Daniel_Wolf
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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's avatar
f5mkuDefault
Icon for Cirrus rankCirrus
Jun 02, 2021

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

  • Daniel_Wolf's avatar
    Daniel_Wolf
    Icon for MVP rankMVP
    Jun 02, 2021

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

  • f5mkuDefault's avatar
    f5mkuDefault
    Icon for Cirrus rankCirrus
    Jun 02, 2021

    Thanks a lot Daniel.