Bug ID 592682: TCP: connections may stall or be dropped

Last Modified: Oct 01, 2018

Bug Tracker

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

Known Affected Versions:
12.1.0

Fixed In:
13.0.0, 12.1.0 HF1

Opened: May 11, 2016
Severity: 3-Major

Symptoms

TCP connections stall or get dropped.

Impact

This usually happens with rateshaper or BWC enabled. Rarely could also happen with very lossy networks.

Conditions

Under some network conditions especially with rateshaper enabled TCP connection could stall and ultimately get reset.

Workaround

None

Fix Information

Properly manage re-transmissions after a tail drop by not not doing the exponential back-off. Reset the re-transmit timer for every partial ack received after a tail drop.

Behavior Change