Bug ID 760050: cwnd warning message in log

Last Modified: Sep 11, 2019

Bug Tracker

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

Known Affected Versions:
15.0.0, 14.1.0, 14.0.0.3, 13.1.1.2, 12.1.4, 11.6.3.3, 11.5.9

Opened: Feb 28, 2019
Severity: 3-Major

Symptoms

The following benign message appears in the log: cwnd too low.

Impact

None. TCP resets the congestion window to 1 MSS.

Conditions

The TCP congestion window has dropped below one Maximum Segment Size, which should not happen.

Workaround

This message does not indicate a functional issue, so you can safely ignore this message. There is no action to take, but the presence of the message can be useful information for debugging other TCP problems.

Fix Information

None

Behavior Change