[arin-ppml] Petition Underway - Policy Proposal 95:CustomerConfidentiality - Time Sensitive

James Hess mysidia at gmail.com
Wed Feb 3 02:54:03 EST 2010

On Tue, Feb 2, 2010 at 9:28 PM, Scott Leibrand <scottleibrand at gmail.com> wrote:
> On 2/2/2010 7:00 PM, George Bonser wrote:
> If I, as a colo provider, didn't SWIP customers like this their entire /29,
> I may not be able to meet 80% utilization thresholds.  For purposes of
> calculating utilization, however, the /29 is considered 100% utilized as

It's possible to  keep record of utilization using  the form in sec.  of the NRPM  without SWIPing    -- where a full /29 block
is not re-assigned.

SWIPs  submitted to ARIN are not  (or should not)  be your only
records or way of keeping proper information about re-assignments  for
justifying additional allocation requests,  since most  ISPs and
end-users will have some allocations or assignments of blocks smaller
than /29.
e,g  it might look like

City 	Which IP Addresses Assigned 	No. of Internal Machines 	Purpose:
(CITY)            *                          1
                                    Name) -
                              4 customer IPs
                              4 provider

So, you have   4  IPs    that are part of the service provider's
network and broadcast addresses required for
your router,    plus  your 2  router IPs  for their  servers to use as
gateway.  Then 4 customer IPs, for their server.

It may be more convenient to just SWIP the entire /29,  provider IPs and all..
but then again,  this will  show the customer as  'responsible' for
some collocation provider router IPs then,  which might be

In this case... you have 100% utilized the /29.
You assigned 4 IPs to your equipment, and you delegated an address
block equivalent in allocation size of a /30 to the user  (probably to 6).

The end-user's network block is  smaller than a  /29,  so  no SWIP
would be required under NRPM

Your router on your premises...   and your inefficiency.
Now  if you peered with a customer router over a /30, and forwarded a
/29,  that would  indicate  reassignment of a full /29.


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