AT&T UVERSE Native IPv6, a HOWTO

Mon Dec 2 23:45:28 UTC 2013

On Mon, 02 Dec 2013 17:54:50 -0500, Owen DeLong <owen at delong.com> wrote:
> I don't know why you think that the PC and Laptop can't talk to each  
> other. It actually seems to work just fine. They both default to the  
> upstream router and the router has more specifics to each of the two LAN  
> segments.

You are confusing ROUTING with the WINDOWS FIREWALL (on by default)

Wired pinging Wireless will be dropped by the OS as foreign, unsolicited  
traffic. (I see it often enough: A cannot talk to B because they're in  
different networks.)

> Micr0$0ft doesn't have to make any assumptions at all. In the IPv6  
> world, they can use site-scoped multicast (ffx5::).

People don't even know what link-local addresses are (and they don't cross  
links.)  Site-local (ULA) requires administrative configuration; no  
machine, by default, will have a ULA address until manually configured  
(i.e. they see an RA.)

> Frankly, if you're paying for IPv6 space, you're not too bright. You can  
> go get a direct assignment from an RIR so easily for $100/year that it  
> just doesn't make sense to pay more than that.

If you can justify it. A home user... good luck with that (a: getting the  
space, and then b: getting Uverse, etc. to use it.) For a business, I  
always say get your own space, unless you like re-numbering every time you  
change providers. (we've done it 5 times in 10 years. 'tho none of them  
have ever supported IPv6; shame on them.) [while "renumbering" the network  
may be simple, changing the prefix(es) that have been recorded in various  
systems is still a pain.]