Thanks for the reply.
New question: Since Comcast now supports ipv6 in my area would I still need to pay Comcast for a second ip address?
Also, if Comcast does allow it now, I assume all of my devices need to support ipv6, or can I have some legacy ipv4 devices connected?
For example, I would still like to have the nettalk duo device connected between the modem and router, and I assume the modem, router, switch and nettalk devices would all need to support ipv6, but would devices behind the router need to support it was well, or could the router us NAT for legacy devices?
I hope my questions make sense.