said by computerman2:Does At&t use IPv6 on at&t dsl? if so is there a proper way to set it up with my Netgear 7550N Gateway Router with Windows 8 Pro 64bit
AT&T currently is using a 6rd gateway for IPv6 implementation for U-verse customers, but I don't think that it is generally available to ATM based DSL customers. I know that prior to my apartment manager's DSL connection being converted from an ATM DSL circuit to an IPDSL U-verse circuit (I maintain the office network), I tried to use their 6rd relay, but I could not connect to it.
Here are a few screen shots from the NVG510 that show the IPv6 implementation for that U-verse gateway (basically the only customer control is an on/off switch). I don't have access to a Netgear 7550N Gateway Router to look at its config pages, but I don't think that it natively supports IPv6, but perhaps someone who is familiar with that box can provide a definitive answer. Possibly if you put your Netgear 7550N Gateway Router into bridge mode and use an external router that supports 6rd, you may (or may not) be able to get AT&T's pseudo dual stack to work by pointing to AT&T's 6rd relay and using their 6rd DNS servers.