Re: [v6ops] I-D Action: draft-ietf-v6ops-6to4-to-historic-07.txt

[Doug Barton <[e-mail]>]

On 11/13/14 11:59 AM, Gert Doering wrote:
> Hi,
>
> On Thu, Nov 13, 2014 at 09:52:48AM -1000, Ole Troan wrote:
>> it certainly would be interesting to hear what existing use cases there are for peer to peer mode 6to4 (as in without relays). I also have a hard time understanding the usefulness of keeping any of it.
>
> Well, access to hosts behind a router with one global IPv4 address and
> a 6to4 gateway in it comes to mind - without having to configure explicit
> NAT mappings on the router.  I think this is Keith's scenario.
>
> (Client has working global IPv4, Router has working global IPv4, neither
> has v6, but peer-to-peer 6to4 enables access to inside LAN with 2002:
> addresses derived from Router's v4 address)

Isn't that the use case that ULAs are meant to cover? Or am I missing 
something here?

I made the point earlier that (for example) OpenWRT already has support 
for PD, it also creates a ULA network on the LAN side, whether you have 
a public prefix (or tunnel) or not. So all of that is doable today, with 
running code.

Doug