Help: HOWTO buy IP address blocks from ARIN?

[Joshua Judson Rosen]

On January 9, 2015 5:56:43 PM EST, John Abreau wrote:
>
>What are your project's needs that explicitly require 4K distinct
>public
>addresses and that cannot function using private addresses and NAT
>instead?

'Project' is a geographically-distributed tech company with a bunch of frequently-mobile sub-networks where at least one end of any given 'internal' connection actually needs to be going out from behind someone else's network.

There's certainly a chance that, say, our VPN or LAN addresses won't conflict with any of the arbitrarily-addressed host networks where the VPN endpoints reside, but we'd really rather have a routing scheme that 'will work' as opposed to something that 'might work'.

1k addresses go to a main-office LAN; the rest of them basically go to site offices. All of these things have the aforementioned routing constraints.

"Just buy a block of IP addresses that are actually guaranteed routable" is the solution that I've seen in place at all of my former companies, though I've never been the one to make it happen before.

How would you do it?

>On Fri, Jan 9, 2015 at 4:29 PM, Lloyd Kvam <python at venix.com> wrote:
>
>> On Thu, 2015-01-08 at 17:26 -0500, Joshua Judson Rosen wrote:
>> > Anyone here ever been through the process of procuring an IP block
>> > from ARIN?
>>
>> Actually from my upstream ISP (UUNET) many years ago.  I was
>requesting
>> a /21.  The requirements were essentially the same back then.
>>
>> You're requesting 4K addresses.  They want to know that 1K will be
>used
>> right now and that at least 2K will be in use within a year.  If the
>> only way you can use up that number of addresses is by allocating one
>> thousand /30's they will turn you down.  They are basically looking
>for
>> individual addresses, but you can count the lost addresses from your
>> subnet scheme.
>>
>> > I'm trying to interpret the requirements they give for an
>> > "end-user initial assignment", which are:
>> >
>> >     * provide data demonstrating at least a 25% utilization rate of
>the
>> >       requested block immediately upon assignment
>> >
>> >     * provide data demonstrating at least a 50% utilization rate of
>the
>> >       requested block within one year
>> >
>> > .. and maybe I'm just being dense, but it's not entirely obvious to
>me
>> > what "utilization rate" actually means here: do they mean
>"sub-blocks
>> > allocated to specific subnets with some-definition-of-minimal
>waste",
>> > or do they mean "individual addresses actually, specifically
>assigned"?
>> >
>> >
>> > I'm trying to rationalise a /20 block, because I can't seem to
>> > partition the space such that I end up with < 50% allocated
>immediately
>> > or < 75% allocated over the next year; but if I count up the actual
>> > nodes that I expect to exist on all of my subnets, those counts are
>> > definitely short of both the `25% utilization immediately' and
>> > `50% utilization within one year' figures.
>> >
>> > If I'm really supposed to be counting individual addresses
>> > and not summing subnet sizes, what am I likely to be doing wrong
>here?

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