First, did you read the article? There were two suggestions mentioned.
Second, Apple had previously posted a KnowledgeBase article explaining the steps to take to revert back to the previous version, v10.2.6, which gives the user his/her Ethernet connection back.
Of course I read the article, I'm using a PC.
How does one come to know about the fixes, absent access to another machine, not similarly afflicted?
Just making light of the situation.