Bug ID 584717: TCP window scaling is not applied when SYN cookies are active

Last Modified: Sep 13, 2023

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

Fixed In:
11.5.4 HF2

Opened: Mar 31, 2016

Severity: 3-Major

Symptoms

TCP window scaling is not applied, which can be observed in transmitted packets containing small segments that are about the size of the unscaled window.

Impact

Poor performance / throughput.

Conditions

SYN cookies have been activated.

Workaround

None

Fix Information

The tmm now properly scales the TCP window upon SYN cookie activation.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips