AT&T UVERSE Native IPv6, a HOWTO

Thu Nov 28 22:37:52 UTC 2013

On 28 November 2013 13:07, Leo Vegoda <leo.vegoda at icann.org> wrote:
> Andrew D Kirch wrote:
>
> Was I the only one who thought that everything about this was great
> apart from this comment:
>
>> In reality additional poking leads me to believe AT&T gives you a
> rather
>> generous /60
>
> Is a /60 what is considered generous these days? I thought a /48 was
> considered normal and a /56 was considered a bit tight. What prefix
> lengths are residential access providers handing out by default these
> days?

Remember, this is just 6rd.  With 6rd, a /60 does sound quite generous indeed.

And it's a /60 for each IPv4 you have, e.g. if you have a static IP
allocation with AT&T U-verse, say, a /27, then you're effectively
getting a /55 (plus also an additional /60 for the DHCP address in a
shared subnet to which your /27 is routed to).

That said, I wholeheartedly agree with your comment otherwise.

C.