Bug ID 450087: Unacknowledged segments may fail to be retransmitted

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 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, 11.5.10

Fixed In:
11.6.0, 11.5.2, 11.4.1 HF6, 11.3.0 HF9, 11.2.1 HF11

Opened: Feb 24, 2014
Severity: 3-Major
Related Article:
K16537

Symptoms

Unacknowledged TCP segments are not retransmitted.

Impact

This issue causes connection timeouts.

Conditions

Remote endpoint closes TCP window early and drops incoming TCP segment(s) from BigIP. Affects Standard TCP virtuals.

Workaround

This issue has no workaround.

Fix Information

Unacknowledged TCP segments are re-transmitted upon re-opening of window.

Behavior Change