Bug ID 642786: TMM may drop tunneled traffic when the sys db variable 'connection.vlankeyed' is set to 'disable'.

Last Modified: Apr 19, 2021

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,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:

Opened: Feb 01, 2017
Severity: 3-Major
Related AskF5 Article:


The BIG-IP system may drop tunneled traffic destined for it, even though the corresponding tunnel is created correctly.


The BIG-IP system may drop tunneled traffic.


The local-address of a tunnel is resided in a non-default route-domain and the sys db variable 'connection.vlankeyed' is set to 'disable'. Note that the default setting of that sys db variable is 'enable'.



Fix Information

The BIG-IP system no longer drops tunneled traffic.

Behavior Change