Except it's impossible to know today who you'll need to connect to 2 years from now and know whether or not your space will collide, especially if you're connecting to ~1000 such companies. -----Original Message----- From: Niels Bakker [mailto:niels=nanog@bakker.net] Sent: Monday, April 28, 2003 7:11 PM To: nanog@merit.edu Subject: Re: Get as much IP space as you ever dreamed of, was: Re: Looking to buy IPv4 addresses from class C swamp * stephen@sprunk.org (Stephen Sprunk) [Tue 29 Apr 2003, 00:50 CEST]:

N companies can have up to N(N-1) interconnections, which requires either: a) double NAT, with a single address range for all interconnects b) no NAT, with a unique address range for each interconnect c) very careful management of the RFC1918 space such that no two companies talking have a collision d) globally unique addresses for each participant using RIRs

(c) simply doesn't work in reality, (b) is no better than (d), and (a) is beyond ugly not to mention incompatible with many apps.

d) is basically having the Internet community pay - both in real money for staffing at RIRs and in scarce IP address space - for no benefit in return at all for a function that those N companies should have an institution perform for them via c). Regards, -- Niels. IMPORTANT:The information contained in this email and/or its attachments is confidential. If you are not the intended recipient, please notify the sender immediately by reply and immediately delete this message and all its attachments. Any review, use, reproduction, disclosure or dissemination of this message or any attachment by an unintended recipient is strictly prohibited. Neither this message nor any attachment is intended as or should be construed as an offer, solicitation or recommendation to buy or sell any security or other financial instrument. Neither the sender, his or her employer nor any of their respective affiliates makes any warranties as to the completeness or accuracy of any of the information contained herein or that this message or any of its attachments is free of viruses.