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North American Network Operators Group

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RE: standards for giving out blocks of IP addresses

  • From: Richard Jimmerson
  • Date: Mon Jun 18 09:15:56 2001

> Again, though it's not written down (Richard Jimmerson?? 
> Comments?), ARIN does not issue end-users additional blocks 
> until their existing blocks are efficiently utilized. 

ARIN does review requests for IP address space from end-users
who can justify the minimum assignment size of a /20, as described
at http://www.arin.net/regserv/ip-assignment.html

It is true that end-user organizations who request additional IP
address space directly form ARIN must demonstrate 80 percent of 
their prior assignment has been efficiently utilized before their 
new request may be considered.  It is also true this is not stated
at the above referenced URL.  It is stated at a different URL where
ISP guidelines for issuing additional IP address space to customers
is described (more about this below).  A discussion about adding this
language to http://www.arin.net/regserv/ip-assignment.html will take 
place on ARIN's public policy mailing list (ppml@arin.net).  ARIN's 
policy mailing lists are open to everyone.  Subscription information 
and archives can be found at http://www.arin.net/members/mailing.htm

When it comes to ISPs who assign IP address space to their end-user
customers, it is expected the assignment size will be determined
based on the customer's 25 percent immediate and 50 percent one-year
needs, as described in RFC 2050.  It is also stated at
http://www.arin.net/regserv/addipspace.html that ISPs need to adhere
to the following when considering requests for additional IP address
from their customers:

"Reassignment information for prior allocations must show that each
customer meets the 80% utilization criteria and must be available 
via SWIP/RWHOIS prior to your issuing them additional space."

Richard Jimmerson
Director of Operations
American Registry for Internet Numbers (ARIN)



> -----Original Message-----
> From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> David R Huberman
> Sent: Saturday, June 16, 2001 7:23 PM
> To: Charles Scott
> Cc: nanog@merit.edu
> Subject: Re: standards for giving out blocks of IP addresses
> 
> 
> 
> Since this is NANOG, I'll restrict my comments to ARIN policy:
> 
> > Unfortunately RFC2050 doesn't address at what point 
> additional address
> > space should be assigned to an end user, however, it never uses the
> > 80% figure in that respect.
> 
> Interestingly, ARIN doesn't publish any policy on additional address
> space assignments to end-users.
> 
> However, I can tell you that in practice (and it's common 
> sense, too) ARIN
> does not issue additional assignments to end-users until they 
> demonstrate
> that they have used their previous assignment efficiently (80%). Why?
> 
> Because:
> 
> > This means that if they are already at 50%, you assign them another
> > block equial in size to what they have, and they reasonably 
> expect to
> > double their utilization in the next year, that everyone should be
> > happy.
> 
> You can't use 25% of the additional block immediately if you 
> still have
> 50% of the initial block available*.
> 
> Again, though it's not written down (Richard Jimmerson?? 
> Comments?), ARIN
> does not issue end-users additional blocks until their 
> existing blocks are
> efficiently utilized. 
> 
> /david
> 
> [*] if you can, you're a special case that's not material to this
> discussion.




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