Bug ID 618428: iRules LX - Debug mode does not function in dedicated mode

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP TMOS(all modules)

Fixed In:
13.0.0, 12.1.2 HF1

Opened: Sep 23, 2016

Severity: 3-Major


In case if the debug option is enabled in the dedicated mode, sometimes some of the nodejs process can be allocated a "in-use" port, which prevents it from starting successfully. By design every process is guaranteed a debug port in the configured range as long as there are enough ports available in the system. In-use ports are skipped, so consecutive port allocation is not guaranteed.


Some of the nodejs processes fail to start which prevents normal iRuleLX operation.


some of the ports in the range are busy.


Consult with netstat output and set the debug-port-range-low to a higher value (eg. 10000+) to minimise the change of a port conflict.

Fix Information


Behavior Change

Guides & references

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