Bug ID 720440: Radius monitor marks pool members down after 6 seconds

Last Modified: Nov 22, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3, 15.1.0,,,,

Fixed In:

Opened: May 16, 2018
Severity: 3-Major


The radius monitor marks a pool member down if it does not respond within 6 seconds, regardless of the interval or timeout settings in the monitor configuration.


The pool member may be marked down incorrectly if the monitor interval is configured to be greater than 6 seconds.


A radius monitor is used, and the pool member takes more than 6 seconds to respond to a radius request.


There is no workaround at this time.

Fix Information

The maximum length of time that the radius probe will wait for has been increased from 6 seconds to 30 seconds.

Behavior Change