Bug ID 421145: Random port selection scheme can cause false port exhaustion

Last Modified: Oct 16, 2023

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

Known Affected Versions:
11.0.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.5.1 HF1, 11.6.1 HF1, 11.5.1 HF2, 11.6.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.1 HF10, 11.5.1 HF11, 11.5.2 HF1, 11.6.2 HF1, 11.5.3 HF1, 11.5.3 HF2, 11.5.4 HF1, 11.5.4 HF2, 11.5.4 HF3, 11.5.4 HF4, 11.1.0, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF6, 11.2.1 HF11

Opened: May 14, 2013

Severity: 3-Major

Related Article: K15036

Symptoms

Port exhaustion can occur on systems that have approximately 500 active server-side flows on the affected thread.

Impact

Very occasional port exhaustion messages appearing for seemingly no reason.

Conditions

This occurs on systems that have approximately 500 active server-side flows on the affected thread.

Workaround

None.

Fix Information

Systems with many hundreds of active server-side flows on the affected thread no longer result in port exhaustion.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips