Steve - For the first end site that has to connect via IPv6, it will be very bad if there is not a base of IPv6 web/email sites already in place. While there are going to efforts to recover unused IPv4 space, we're currently going through 10 to 12 blocks of /8 size annually, so you may get an additional year or two, but it doesn't change the end state. There's no reason for end organizations to change their existing IPv4 infrastructure, but they do need to get their public facing servers reachable via IPv6. Anyone who thinks that the ISP's community can continue to grow using smaller and smaller pieces of reclaimed IPv4 address space hasn't considered the resulting routing table. We've build an entire Internet based on the assumption that most new end user sites are getting hierarchical, aggregatable PA assignments. This assumption is soon to fail until there's an option for connecting customers up via new hierarchical address space. Interoperability is achieved by having public facing servers reachable via IPv4 and IPv6. /John At 4:00 PM +0100 6/28/07, Stephen Wilcox wrote:
Hmm I find this topic quite interesting.
First is the belief that the Internet will suddenly break on the day when the last IP block is allocated by an RIR - the fact that most of the v4 space is currently not being announced may mean we have many years before there are real widespread shortages
Second is the belief that this will prompt a migration to IPv6, as though moving to an entirely different and largely unsupported protocol stack is the logical thing to happen. Surely it is easier and far cheaper by use of existing technology for example for organisations to make efficient use of their public IPs and deploy NATs?
As technology people we are looking at v6 as the clean bright future of IP, but the real world is driven by economics and I dont see v6 as being economically viable in the near future....
I'm also yet to hear a convincing explanation of how v6 and v4 are expected to interoperate in a v4 internet that contains v6 islands...
Steve
On Thu, Jun 28, 2007 at 10:33:25AM -0400, JORDI PALET MARTINEZ wrote:
I'm working on it ... But I think it will be really difficult to capture in a couple of pages what the document try to explain !
Regards, Jordi
De: Iljitsch van Beijnum <iljitsch@muada.com> Responder a: <owner-nanog@merit.edu> Fecha: Thu, 28 Jun 2007 15:25:22 +0200 Para: <jordi.palet@consulintel.es> CC: <nanog@nanog.org> Asunto: Re: The Choice: IPv4 Exhaustion or Transition to IPv6
On 27-jun-2007, at 21:08, JORDI PALET MARTINEZ wrote:
I've published a document trying to analyze the IPv4 exhaustion problem and what is ahead of us, considering among others, changes in policies.
Ugh, a link to a page with a link...
Do you have an executive summary for us?
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