I've been using gogo6 for over 2.5 years. Works well.

 

Yep, Gogo6 worked well for me as well. I have moved to Rogers 6RD service which is no faster than Gogo but it does do its thing on the router not on a PC which suits me.

 

^^^^
My router is a Linux box and that's where my tunnel terminates. Do you get a subnet from Rogers? Or just a single address? If a subnet, is it tied to your IPv4 address? IIRC, the main IPv6 address is when using 6rd or 6to4. My IPv6 addresses (all 2^72 of them) from gogo6 are static.

 

My router is a Dlink with V6 support ( Native, 6rd and tunnels). Rogers has a /32 prefix for all their 6rd users. I get that with my Rogers V4 address in the next 32 bits ending up with a /64 prefix. The Rogers V4 address may well be static as it hasn't changed for a year at least.
Reading the RFC on 6RD I see that Rogers could supply a /56 by only using 28 bits of their /32 prefix but likely they feel it is not necessary for residential customers. When they move to native V6 I imagine they will do so.

I had a /56 from Gogo as you do. I remember your earlier posts about your Linux bases router and nearly did it myself.

For ISPs like Rogers I think 6RD is a good intermediate step as they can supply a "home gateway" that just works without the user having to know anything. If the home user has PCs/phones/tablets with a dual stack they will just work, if not they will not see any changes.

 

As I suspected the problem with 6rd is your entire subnet address will change with your IPv4 address. I know that happened rarely, but it still does. That means changing all the IP addresses in the DNS server I use. With my Rogers IPv4 address, while the address may change, the host name doesn't so I just had to use an alias on the DNS server. That won't work with my IPv6 addresses.

 

Correct and as you say this will disturb (!) your DNS. On reading the introduction to RFC5969 it appears that 6rd is specifically designed for "simple" residential users and I'd bet that 99.99% of them do not have their own DNS. The RFC sort of suggests that 6 to 4 be used for the more complex cases.
The point tho' is that the ISP can provide customer site equipment that will just work. I think this is important to the universal acceptance of V6.
FWIW Rogers support 6 to 4 as well and give directions for its set up. I tried it but my Dlink ( 2 years old now) "prefers" 6rd. and I think when Rogers go to native V6 will keep on working.

This is off topic for the OP in this thread but one hopes he has signed up with GoGo by now!

 

^^^^
Gogo6 uses 6in4, not 6to4. 6to4 has the same address issues as 6rd, but in general 6rd is an improvement on 6to4.