I had the same problem back when the switchover happened. The 
connectivity would be on-again off-again, and would never stay "on" for 
more that 10 minutes at a time. In my case, what fixed it was going into 
the SMC's web interface and changing the WAN sides MAC address by 
cloning an internal one (the button's there to do so). Once I changed 
that MAC and cycled both the SMC and the cable modem, I've been pretty 
much up since.

staceystevie@uswestmail.net wrote:

>Good evening. Since converting my isp from @home to
>cox.net I've been unable to use my SMC Barricade 4 port
>router. I suspect that the router is wanting to see a
>domain name, like it had when I configured it for @home
>(that's the only thing that I can think of that's
>changed). If anyone has seen this issue and know the
>fix, I'd greatly appreciate it.
>
>Thank you,
>Stacey
>
>
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