Bug ID 666494: Refine PUSH flag settings for sub MSS packets

Last Modified: Aug 08, 2019

Bug Tracker

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

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3

Fixed In:
14.0.0

Opened: May 25, 2017
Severity: 3-Major

Symptoms

Currently, in Auto mode, PUSH flag is set based on the application/network conditions. The system should instead append a PUSH flag to sub-MSS TCP segments (except 0 length pure ACK) to PUSH small segments faster to the receiving application in auto mode.

Impact

Non HTTP applications receive small segments slower if PUSH Flag is not present in sub-MSS TCP segments.

Conditions

Non HTTP applications sending sub MSS packets.

Workaround

None.

Fix Information

In Auto Mode, last sub-MSS TCP segments are always appended with PUSH flag.

Behavior Change