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Forum Discussion

Martin_Vlasko's avatar
Martin_Vlasko
Icon for Altocumulus rankAltocumulus
Nov 16, 2015

Monitor which does not bring the service down for 20 seconds?

Hi,   The default setting for monitor is 5 sec interval and 16 sec timeout. This means the total time during which a user might not be able to reach the service is at least 5+16 seconds, which is ...
devops
health monitor
LTM
monitor
Amine_Kadimi's avatar
Amine_Kadimi
Icon for MVP rankMVP
Nov 16, 2015

You may consider passive monitoring with an inband monitor which is the quickest way to mark a member down. Don't forget to also associate an active monitor to bring the member up when it comes back again.

 

" Passive monitoring occurs as part of a client request. This kind of monitoring checks the health of a pool member based on a specified number of connection attempts or data request attempts that occur within a specified time period. If, after the specified number of attempts within the defined interval, the system cannot connect to the server or receive a response, or if the system receives a bad response, the system marks the pool member as down. There is only one passive monitor, called an Inband monitor.

 

A passive monitor creates no additional network traffic beyond the client request and server response. It can mark a pool member as down quickly, as long as there is some amount of network traffic. "

 

Source: https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-monitors-reference-11-6-0/1.html