Bug ID 696735: TCP ToS Passthrough mode does not work correctly

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,, 15.0.0, 15.0.1,,,,

Fixed In:

Opened: Nov 29, 2017
Severity: 3-Major


For Standard virtual server with a TCP profile, when using ToS passthough, the ToS value is not passed from the server to the client-side. ip-tos-to-client pass-through link-qos-to-client pass-through


ToS is not passed to the client.


- Standard virtual server. - TCP profile configured with ToS passthrough.



Fix Information

ToS is now passed correctly from the server to the client-side.

Behavior Change