On Thu, Jun 27, 2002 at 01:56:26AM -0700, David Schwartz wrote: > > >My *personal* opinion is that wise ISPs only punt customers to ARIN once > >they reach the point where they can, in fact, have a normal ARIN netblock > >assigned directly to them (currently a /20, unless I slept through another > >change...) > > The guidelines have a strong preference for singly-homed networks to > use IP address space allocated to them from their upstreams. I can think > of no logical reason* an ISP would prefer their customers to go to ARIN > rather than deal with them. The global routing table is better off for it > as well, as the customer's /20 would be a new route, rather than being > included in their provider's presumably larger block.
The assumption that the ISP has a larger block is not always a wise one to make. > On the other hand, I can think of many reasons a customer would prefer > to deal with ARIN than their upstream, assuming the meager cost wasn't a > factor and they don't mind polluting the global table a tad. Of course, > that's not really an operational issue. Most of the places I've worked would be charging them for the IP usage either way, since the ISP has to pay ARIN, eventually... > DS > > * The only reason I could possibly think of is if the ISP is afraid that > the large allocation will impact their future allocations because they > don't have the confidence or competence to extract a proper justification > from their customer and present/defend that justification to ARIN when > their next allocation comes up. But this wasn't the reason you were > thinking of, right? See above. Sometimes you have lots of IP space, but nothing *large*, due to business constraints. This often changes over time, but some of us don't have multiple legacy /16s from Back In The Day (and then again, some of us do - but not the 'us' I work for, anymore). Not under NDA, since all of it can be found by asking ARIN, of course. :) -- *************************************************************************** Joel Baker System Administrator - lightbearer.com [EMAIL PROTECTED] http://users.lightbearer.com/lucifer/