Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

rjordan's avatar
rjordan
Icon for Nimbostratus rankNimbostratus
May 20, 2018

Make LB decision based on application data

Any ideas on how I can configure LTM to make LB decisions based on application data such as an HTTP page that returns the number of application sessions on each pool member? I need to load balance...
application delivery
irules
LTM
JG's avatar
JG
Icon for Cumulonimbus rankCumulonimbus
May 21, 2018

You could do this through the F5 health monitoring mechanism.

 

Essentially, have a programme running on each of the 3 back-end servers and counting user sessions. If the number of user sessions reaches 50, the programme will write to a file accessed by the F5 monitor to cause that app server to be marked down by F5. Existing connections will continue, but new connections will be sent to the other back-end servers.