Re: Greenfield 464XLAT (In January)

[William Herrin <bill () herrin us>]

On Wed, Jun 10, 2015 at 4:22 PM, Nicholas Warren
<nwarren () barryelectric com> wrote:
> Sincere apologies if this e-mail is inappropriate for this audience,

Hi Nich,

Looks like the correct audience to me.


> We are (going to be) a startup ISP building a new network from the
> ground up. [...] The main reason we are even considering 464XLAT
> as opposed to dual-stack (the latter is, in my ignorant opinion, the
> better option.) is the fear of IPv4 depletion that we think might hit
> ARIN between now and the start of next year; causing us to pay a
> premium for IPv4 in the gray market.

Your customers will require end-to-end IPv4 for the foreseeable future.

464XLAT can provide natted IPv4 using an internal IPv6 infrastructure
in special circumstances. Specifically: you must have sufficient
control of the customer equipment to compel it to employ 464XLAT to
provide IPv4 services to the customer. If your customers lease phones
from you and your phone vendors build in 464XLAT support, T-Mobile has
demonstrated that this is practical. If your customers bring generic
Macs and PCs with the odd Linux user in the mix (their equipment, not
yours), you may be asking for extensive support headaches with
464XLAT.

Dual stack with carrier NAT would also handle your IPv4 needs. You'll
have an additional expense maintaining both protocols within your
infrastructure. Nevertheless, this approach alleviates the need to
control the customer premises equipment.

Regardless of your approach, DS+NAT or 464XLAT, you will require a
comparable number of global IPv4 addresses. Neither technology
eliminates your need for IPv4 addresses facing the public Internet.

Regardless of your approach, you will need to make provisions to
support customers who require a global and/or static IPv4 address
without NAT. It need not be part of your basic package, but if it's
unavailable at any price you can be sure of getting a PR black eye at
some point.

Regards,
Bill Herrin


-- 
William Herrin ................ herrin () dirtside com  bill () herrin us
Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/>