Microsoft: Give Xbox One users IPv6 connectivity

[John Mann]

Hi,

On 10 October 2013 14:25, Lorenzo Colitti <lorenzo at google.com> wrote:

> On Thu, Oct 10, 2013 at 12:19 PM, Geoff Huston <gih at apnic.net> wrote:
>
>> But I've thought about your response, and if I'm allowed to dream (!),
>> and in that dream where the efforts of COmcast, Google etc with IPv6 bear
>> fruit, and I'm allowed to contemplate a world of, say, 33% IPv6 and 66% V4,
>> then wouldn't we then see the remaining Teredo folk having 33% of their
>> peer sessions head into Teredo relays to get to those 33% who are using
>> unicast IPv6? And wouldn't that require these Teredo relays that we all
>> know have been such a performance headache?
>>
>
> Can't you fix that by telling the app "if all you have is Teredo, prefer
> Teredo even if the peer has native IPv6 as well"?
>
> Of course this breaks down when IPv4 goes away, once IPv4 starts going
> away then there's really way to do peer-to-peer without relays, right?
> (Also, IPv4 going away is relatively far away at this point.)
>

These issues are discussed in the document:
---
Even for users that *do have native IPv6 – Teredo will be used to interact
with IPv4-only peers*, or in cases where IPv6 connectivity between peers is
not functioning. In general, Xbox One will dynamically assess and use the
best available connectivity method (Native IPv6, Teredo, and even IPv4).
The implementation is similar in sprit to RFC
6555<http://tools.ietf.org/html/rfc6555>
.

For that reason, it is important for all interested network operators to
understand Teredo operating requirements. Xbox One *does not support
operating on an IPv6-only* network because of the need to reliably
interoperate with nodes on IPv4-only networks.
---

    John
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