Bug ID 520682: In PBA mode subscribers cannot initiate more than 512 connections to the same server IP:port

Last Modified: Mar 21, 2019

Bug Tracker

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

Known Affected Versions:
11.6.0, 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, 11.6.1, 11.6.1 HF1, 11.6.1 HF2, 11.6.2, 11.6.2 HF1, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4

Fixed In:
12.1.0, 12.0.0

Opened: Apr 29, 2015
Severity: 3-Major
Related AskF5 Article:
K54402241

Symptoms

In PBA mode connections fail and new port blocks are not allocated when subscriber attempts more than 512 connections to the same server IP and port.

Impact

Subscribers can initiate only 512 connections to particular server IP:port.

Conditions

PBA mode is configured on the LSN pool and inbound connections setting is set to disabled.

Workaround

Set 'Inbound connections' setting in the LSN pool to 'Automatic'.

Fix Information

In PBA mode connections now succeed and new port blocks are allocated as expected when subscriber attempts more than 512 connections to the same server IP and port.

Behavior Change