This is my running log of trying to enable IPv6 at home using a router that is NOT built into my modem. Hopefully this will be successful in short order, and therefore useful to the internet at large.
I currently am set up with a Cisco RV042v3 DUAL WAN router connecting to a CenturyLink/Qwest Q1000 ActionTec VDSL2 modem/router in “transparent bridging” mode.
Disconnecting the RV042, and setting the Q1000 up as a primary router produce positive results on the following three test sites (http://test-ipv6.com, http://ismyipv6working.com, ipv6.google.com) when the router is configured as on this site. This is using a technique called 6rd which is different from 6to4 and 6in4.
So the question is how to configure the RV042 to do this when the modem is in transparent bridging mode. So far, no joy. 5+ hours on the phone with a pleasant Mr. Perez from Cisco support, along with joint conference calls with CenturyLink tech support have not yielded any fruit.
I will continue to update this post as tickets are still open with Cisco and CenturyLink.
UPDATE (11/8/16): Never got the setup working for IPv6. Ending up rolling my own router using pfSense.