For the latest on our response to Coronavirus (COVID-19), click here.
IPv6 with Pace 5268AC and cascaded router
I have just upgraded from an older (AT&T) standard ADSL service to ADSL2+, and am not exactly sure how to get IPv6 working in my current configuration.
My old setup was simple: ASUS RT-AC66U -> plain DSL modem. The ASUS handled the PPoE sign in, etc., and was configured for using IPv6 using 6rd (the same settings that the new Pace uses, as it turns out).
In my new setup, due to there being no true bridge mode on the Pace 5268AC gateway, I have my ASUS router simply cascaded from the Pace (just a simple ASUS WAN port -> Pace LAN, not DMZ'd, nothing else hooked into the Pace, Pace wireless shut off). This is working fine *except* for IPv6. I am unsure how I should have my ASUS router's IPv6 configured. I am admittedly a little hazy on how 6rd tunneling should work across routers. Unsurprisingly, leaving my ASUS router configured with the same 6rd settings (identical to the Pace settings) does not work. I've searched around a bit and I am left with the impression that there may be issues with the Pace and its IPv6 6rd handling that prevent this from working (people who are trying this are typically using DMZ, but it seems to me this "should" be possible with a standard cascaded router setup).
So, the question becomes: What should be the proper way to configure a cascaded router configuration to get IPv6 working with 6rd? But more to the point, how do I get this working with my *specific* setup (this "interesting" Pace gateway)? The two answers might not be the same.