Bug ID 726734: DAGv2 port lookup stringent may fail

Last Modified: Jun 20, 2019

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,,, 14.0.0,,,,,

Fixed In:

Opened: Jul 04, 2018
Severity: 3-Major


Under certain circumstances tmm might not be able to find a local port, and the connection may fail. This happens, for example, for active FTP with mirroring enabled.


Connection cannot get established.


Active FTP with mirroring enabled.


There is no workaround other than to disable mirroring.

Fix Information

TMM is now always able to find a local port.

Behavior Change