Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: standards for giving out blocks of IP addresses

  • From: up
  • Date: Sat Jun 16 12:49:34 2001


It's not really a question of what makes sense, it's what you need to do
to keep ARIN happy.  As an ISP, if you only apply the 25% / 50% rule to
your customers, how are you supposed to demonstrate 80% utilization to
ARIN when requesting any kind of allocation?

If you've handed out a whole bunch of /24 - /29 subnets to your customers
and they are compliant with RFC2050, this could well result in a situation
where you've depleted nearly all of your address space, yet are nowhere
near 80% utilization or your, say, /21 from your upstream.  Is ARIN going
to allocate you a /20?

On Sat, 16 Jun 2001, Christopher A. Woodfield wrote:

> The 80% utilization rule makes sense for ADDITIONAL allocations, where an 
> end user already has space but needs more. Of course, exceptions can be 
> made for large deployments (customer has 150 hosts on a single /24, but 
> needs two more for a 400-host data center, etc.)
> 
> For initial allocations, the 50% rule makes the most sense, IMHO.
> 
> -Chris
> 
> On Sat, Jun 16, 2001 at 11:10:08AM -0400, Charles Scott wrote:
> > 
> > On Sat, 16 Jun 2001 up@3.am wrote:
> > > 
> > > IIRC, Sprint wanted us to show 80% utilization within 3 months(!), citing
> > > ARIN guidelines...
> > 
> > James:
> >   That's for allocation to ISP's. The RFC refered to end user utilization
> > of the address space (see http://www.arin.net/regserv/ip-assignment.html).
> > I've seen some ISP's incorrectly quote the 80% utilization to customers
> > and expect them to achieve that before assigning them more IP address
> > space.
> > 
> > Chuck
> > 
> > 
> 
> -- 
> ---------------------------
> Christopher A. Woodfield		rekoil@semihuman.com
> 
> PGP Public Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xB887618B
> 

James Smallacombe		      PlantageNet, Inc. CEO and Janitor
up@3.am							    http://3.am
=========================================================================






Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.