[arin-ppml] ARIN-prop-127: Shared Transition Space for IPv4 Address Extension

Owen DeLong owen at delong.com
Thu Jan 20 15:11:10 EST 2011

It's not limited to cable ops. In fact, in many ways they are better off than DSL ops in that DOCSIS 3 has had v6 support spec'd out for much longer than any of the DSL specs.

However, this will impact ALL ISPs that have to implement NAT444...4


Sent from my iPad

On Jan 20, 2011, at 11:58 AM, "Hannigan, Martin" <marty at akamai.com> wrote:

> Tentative support. I understand the problems, technical and financial, that
> the cable operators are facing and think that this idea is at least worth a
> discussion. There's room for the proposal to tighten up a bit with respect
> to overall use, but we can wait and see what the overall feedback is.
> I took the pointer that Wes gave as well with respect to the IETF mailing
> list and while I think that while a lot of the issues were hashed out,
> things change with respect to making this regional and reducing the size to
> a /10. I'm also sympathetic to the cost implications of failing, for them
> and for [you]. The proposal is not necessarily unreasonable, but we should
> be careful to work closely with the authors to insure that what we end up is
> workable.
> Best,
> -M<
> On 1/20/11 11:26 AM, "ARIN" <info at arin.net> wrote:
>> ARIN received the following policy proposal and is posting it to the
>> Public Policy Mailing List (PPML) in accordance with the Policy
>> Development Process.
>> The ARIN Advisory Council (AC) will review the proposal at their next
>> regularly scheduled meeting (if the period before the next regularly
>> scheduled meeting is less than 10 days, then the period may be extended
>> to the subsequent regularly scheduled meeting). The AC will decide how
>> to utilize the proposal and announce the decision to the PPML.
>> The AC invites everyone to comment on the proposal on the PPML,
>> particularly their support or non-support and the reasoning
>> behind their opinion. Such participation contributes to a thorough
>> vetting and provides important guidance to the AC in their deliberations.
>> Draft Policies and Proposals under discussion can be found at:
>> https://www.arin.net/policy/proposals/index.html
>> The ARIN Policy Development Process can be found at:
>> https://www.arin.net/policy/pdp.html
>> Mailing list subscription information can be found
>> at: https://www.arin.net/mailing_lists/
>> Regards,
>> Communications and Member Services
>> American Registry for Internet Numbers (ARIN)
>> ## * ##
>> ARIN-prop-127: Shared Transition Space for IPv4 Address Extension
>> Proposal Originator: Chris Donley, CableLabs
>> Proposal Version: 1
>> Date: 20 January 2011
>> Proposal type: modify
>> Policy term: permanent
>> Policy statement:
>> Updates 4.10 of the NRPM:
>> A second contiguous /10 IPv4 block will be reserved to facilitate IPv4
>> address extension. This block will not be allocated or assigned to any
>> single organization, but is to be shared by Service Providers for
>> internal use for IPv4 address extension deployments until connected
>> networks fully support IPv6. Examples of such needs include: IPv4
>> addresses between home gateways and NAT444 translators.
>> Rationale:
>> The Internet community is rapidly consuming the remaining supply of
>> unallocated IPv4 addresses.  During the transition period to IPv6, it is
>> imperative that Service Providers maintain IPv4 service for devices and
>> networks that are currently incapable of upgrading to IPv6.
>> Consumers must be able to reach the largely IPv4 Internet after
>> exhaustion.  Without a means to share addresses, people or organizations
>> who gain Internet access for the first time, or those who switch
>> providers, or move to another area, will be unable to reach the IPv4
>> Internet.
>> Further, many CPE router devices used to provide residential or
>> small-medium business services have been optimized for IPv4 operation,
>> and typically require replacement in order to fully support the
>> transition to IPv6 (either natively or via one of many transition
>> technologies).  In addition, various consumer devices including
>> IP-enabled televisions, gaming consoles, medical and family monitoring
>> devices, etc. are IPv4-only, and cannot be upgraded.  While these will
>> eventually be replaced with dual-stack or IPv6 capable devices, this
>> transition will take many years.  As these are typically consumer-owned
>> devices, service providers do not have control over the speed of their
>> replacement cycle.  However, consumers have an expectation that they
>> will continue to receive IPv4 service, and that such devices will
>> continue to have IPv4 Internet connectivity after the IPv4 pool is
>> exhausted, even if the customer contracts for new service with a new
>> provider.
>> Until such customers replace their Home Gateways and all IPv4-only
>> devices with IPv6-capable devices, Service Providers will be required to
>> continue to offer IPv4 services through the use of an IPv4 address
>> sharing technology such as NAT444.  A recent study showed that there is
>> no part of RFC1918 space which would not overlap with some IPv4
>> gateways, and therefore to prevent address conflicts, new address space
>> is needed.
>> Service providers are currently presented with three options for
>> obtaining sufficient IPv4 address space for NAT444/IPv4 extension
>> deployments: (1) Request allocations under the NRPM; (2) share address
>> space with other providers (this proposal); or (3) use address space
>> allocated to another entity (i.e. Œsquat¹).  Of the three options,
>> option 2 (this proposal) is preferable, as it will minimize the number
>> of addresses used for IPv4 extension deployments while preserving the
>> authority of IANA and RIRs.
>> Timetable for implementation: immediately
>> _______________________________________________
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