reply to lemonade
Re: DHCP mac address? It may be regional, and it may be simply that your DHCP lease expired between when you disconnected one and reconnected the other. In areas where it gets tied to a MAC address (assuming it IS regional), it seems to also be tied to the DHCP lease - if that expires, so does the MAC lock. Leaving the modem unplugged for a while (an hour or so) is typically enough time for the DHCP lease to expire, at which point it can be connected to something else. The downside is that you'll also get a new IP since it's getting a new lease instead of renewing an existing one.