Bug ID 433985: Forced 100M-FD does not work with Copper SFPs

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.2.1, 11.3.0

Fixed In:
11.2.1 HF11

Opened: Oct 15, 2013
Severity: 3-Major
Related AskF5 Article:


Forcing a port with a Copper SFP to 100M-FD will not pass traffic despite showing link UP.


No traffic on Copper SFP port.


This issue occurs when all of the following conditions are met: -- You have a copper SFP interface fixed to 100baseTX-Full. -- The corresponding interface on the connected switch is fixed to 100baseTX-Full.


Use Auto-negotiation.

Fix Information

Fixed bug to improve system quality.

Behavior Change