[CentOS] Anyone with RedHat Subscription?

Does Anyone with a RedHat subscription able to give a hint as to what 
the solution to the following knowledgebase article is:

https://access.redhat.com/solutions/2801051

I'm having a similar issue with an SFP on a Centos host, and am 
searching for a way to view Optical RX/TX Power on the SFP.

 From the switch side, I'm not seeing any RX Power from the Centos host.

Thanks in advance

Giles