Thunderbolt to Ethernet adaptor no longer works

Hi All,
After upgrading to Maverick I find my Thunderbolt to Ethernet adaptor no longer works. Network app insists the cable isn't connected but the cable works fine with other pcs (a Raspberry Pi for instance).  Any suggestions?
R.

If you have access to the Companies Intranet then the Ethernet connection is working just fine. The computer is getting a valid IP address from the companies DHCP server.
You need to take this up with the IT staff as it seems whatever IP your computer is getting it is being block from going out to the internet.

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