[arin-ppml] 2016-3 Revisited
jschiller at google.com
Tue Jan 31 11:04:13 EST 2017
As one of the originators of this policy change I welcome the rewrite,
with the exception the mechanism to avoid abuse.
Can someone explain the "abuse" concerns if I have not correctly captured
As far as I can tell, the combination of 2016-5 and this proposal (2016-3)
is where the issue comes from.
One of the goals of 2016-5 was to separate section 4 from transfers.
As a result, NRPM 184.108.40.206 & 220.127.116.11 which specifies that organizations must
show efficient utilization of 80% in aggregate, and 50% for each
allocation/assignment is no longer a restriction to transfers.
Without applying 18.104.22.168 & 22.214.171.124 an organization that is holding a /8
that is 90% utilized, could then use 8.5.7 to justify a specified transfer
of a /16.
Once completed, the total holding of a /16 and a /8 would be 89.65%
utilized and could immediately use 8.5.7 to justify another specified
transfer of a /16.
This process could be used 33 times and could result in drawing down a /11
and a /16 without putting a single new address into service.
Basic idea of 2016-3 and 2016-4:
1. Make an easy to use process with an easily predictable outcome for
2. Modify slow start and make it applicable to transfers for end-sites and
3. Give blanket approval for a "first", "small" starter block
4. Show that you have used what you got and then double what you have
5. Can always get more than double following the non-simplified process
Intended Cap implementation:
Doubling more than a /16 could provide way too much IP space
(consider an efficiently used org than is not growing)
Instead the doubling policy is limited at a /16.
However if an organization is growing and has legitimate need for more
than a /16, then it can get a /16 put it into service and then come back
and get another dip.
Suggested Anti-abuse text:
To this, 2016-3 now adds a new paragraph:
8.5.7 Alternative Additional IPv4 Address Block Criteria
In lieu of 8.5.5 and 8.5.6, organizations may qualify for additional IPv4
address blocks by demonstrating both
- 80% utilization of their currently allocated space
- at least 50% utilization of each allocation and assignment
If they do so, they qualify to receive one or more transfers up to the
total size of their current ARIN IPv4 address holdings, with a maximum size
Taking the abuse example above of an organization with a /8 that is is 90%
the organization would need to transfer in a /16.
Then the organization would need to put 32,768 of the new IPs into service,
or renumber the use of 32,768 of IPs from the older IP space to the new
I argue that need to show growth or the renumbering of usage into the new
is of sufficient pain to avoid abuse by organizations that don't actually
need the IP space.
On Tue, Jan 31, 2017 at 8:18 AM, David R Huberman <daveid at panix.com> wrote:
> TL;DR: We updated 2016-3 to fit into the upcoming NRPM, and closed an
> abuse vector. We kept the original text and just incorporated it in the
> new section 8.5 so it works, and time limited it to once every 6 months.
> At the ARIN meeting in Dallas, there was a discussion about 2016-3, a
> policy which seeks to remove Needs Testing for smaller 8.3 and 8.4
> transfers (with a cap of /16). Some more work needed to be done on it, and
> a vote at the Dallas meeting had 27 people ask the AC to continue working
> on it, with 1 person against.
> We've done some work, and the new text is ready for your review and
> New NRPM Coming Out Affects 2016-3:
> Policy 2016-5 was ratified by the board, and will be entering the NRPM
> shortly. 2016-5 adds a new section to section 8 -- it adds 8.5, which are
> the qualifying criteria for transfers. It looks like this:
> 8.5. Specified Transfer Recipient Requirements
> 8.5.1. Registration Services Agreement
> The receiving entity must sign an RSA covering all resources to be
> transferred unless that entity has a current (within the last two versions)
> RSA on file.
> 8.5.2. Operational Use
> ARIN allocates or assigns number resources to organizations via transfer
> solely for the purpose of use on an operational network.
> 8.5.3. Minimum transfer size
> ARINs minimum IPv4 transfer size is a /24.
> 8.5.4. Initial block
> Organizations without direct assignments or allocations from ARIN qualify
> for transfer of an initial IPv4 block of ARINs minimum transfer size.
> 8.5.5. Block size
> Organizations may qualify for the transfer of a larger initial block, or
> an additional block, by providing documentation to ARIN which details the
> use of at least 50% of the requested IPv4 block size within 24 months. An
> officer of the organization shall attest to the documentation provided to
> 8.5.6. Efficient utilization of previous blocks
> Organizations with direct assignments or allocations from ARIN must have
> efficiently utilized at least 50% of their cumulative IPv4 address blocks
> in order to receive additional space. This includes all space reassigned to
> their customers.
> To this, 2016-3 now adds a new paragraph:
> 8.5.7 Alternative Additional IPv4 Address Block Criteria
> In lieu of 8.5.5 and 8.5.6, organizations may qualify for additional IPv4
> address blocks by demonstrating 80% utilization of their currently
> allocated space. If they do so, they qualify to receive one or more
> transfers up to the total size of their current ARIN IPv4 address holdings,
> with a maximum size of /16.
> An organization may only qualify under 8.5.7 once every 6 months.
> This text is pretty much the same text that was originally proposed in
> 2016-3, simply incorporated into the new NRPM language that's coming out.
> It also puts in a mechanism to avoid abuse -- people trying to get around
> the /16 cap -- by limiting it to once every 6 months.
> The AC welcomes your feedback.
> Thank you,
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Jason Schiller|NetOps|jschiller at google.com|571-266-0006
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