Bug ID 602708: Traffic may not passthrough CoS by default

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,, 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, 2016

Severity: 3-Major

Related Article: K84837413


The BIG-IP system may set the packet Quality of Service (QoS) priority to 3 when traffic is processed by an IP forwarding virtual server.


Traffic is set to L2 QoS priority 3 and may cause issues on other networking devices.


-- IP forwarding virtual server. -- Traffic received with priority other than 3.


Create a default CoS configuration or apply L2 QoS settings in the FastL4 profile.

Fix Information

TMM now correctly passes through CoS by default.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips