What's the current state of major access networks in North America ipv6 delivery status?
carlosm3011 at gmail.com
Thu Jan 27 06:56:26 CST 2011
Reading this thread, and building on many comments to a previous one,
I definitely see the need for subnetting a /64 arising sooner than
It might not be perfect, It might be ugly, but it will happen. And, if
you ask me, I would rather subnet a /64 than end up with a ipv6
version of NAT, a much worse alternative.
On Thu, Jan 27, 2011 at 9:57 AM, Brzozowski, John
<John_Brzozowski at cable.comcast.com> wrote:
> In order to deploy /56 to end users would require an IPv6 /24 be dedicated
> to 6rd, /48s would require a dedicated IPv6 /16. This assumes an operator
> wants/needs to provide IPv6 via 6rd to end users where their IPv4 address
> is fully unique. There is quite a bit of IPv6 address space that does not
> gets utilized in this model.
> The routers we are using as part of the trials only support /64 as such we
> are using an IPv6 /32.
> It is also important that operators plan for the ability to delegate
> prefixes that are shorter than a /64. There are several cases that we
> have seen where the router can only make use of a /64. This is better
> than nothing when referring to legacy devices that have been able to
> introduce some support for IPv6 and would have otherwise been IPv4 only
> John Jason Brzozowski
> Comcast Cable
> e) mailto:john_brzozowski at cable.comcast.com
> o) 609-377-6594
> m) 484-962-0060
> w) http://www.comcast6.net
> On 1/26/11 5:02 PM, "Owen DeLong" <owen at delong.com> wrote:
>>On Jan 26, 2011, at 1:52 PM, Charles N Wyble wrote:
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>>> Is anyone tracking the major consumer/business class access networks
>>> delivery of ipv6 in North America?
>>> I'm on ATT DSL. It looks like they want to use 6rd? I've only briefly
>>> looked into 6rd. Is this a dead end path/giant hack?
>>It's a fairly ugly way to deliver IPv6, but, as transition technologies
>>go, it's the least dead-end of the options.
>>It at least provides essentially native dual stack environment. The
>>only difference is that your IPv6 access is via a tunnel. You'll probably
>>be limited to a /56 or less over 6rd, unfortunately, but, because of the
>>awful way 6rd consumes addresses, handing out /48s would be
>>utterly impractical. Free.fr stuck their customers with /60s, which is
>>hopefully a very temporary situation.
>>> I spoke with impulse.net last year, which appears to serve large
>>> portions of the AT&T cable plant in Southern California. They were
>>> willing to offer native ipv6. Not sure how (one /64, a /48) etc.
>>You should definitely push your providers to give you a /48 if
>>possible. If /56 or worse /60 or worst of all, /64 become widespread
>>trends, it may significantly impact, delay, or even prevent innovations
>>in the end-user networking/consumer electronics markets.
Carlos M. Martinez-Cagnazzo
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