--On torsdag 11 november 2004 09.36 -0600 Adi Linden <adil@adis.on.ca> wrote:
RFC1918 address space is free and plentiful for my purposes. It is provider independent. It is globally unique in the sense that no other publically routed network is using them. My globally unique address will come from my provider of the day. NAT is my technology of choice to connect to the global internet, but other solutions are possible.
You are probably going to fare well behind your D-Link residential plastic box. Most people do, as long as they accept the spoon-feeding media model and stay away from potentially dangerous things like trying to challenge who gets to publicise things and whatnot. Anyway, there are other issues with non-unique addresses. Enterprises *WILL* use them, in large, expensive-to-renumber-since-we're-stupid-and-don't-use-DNS schemes. Enterprises merge. I'll gladly hand out the marshmallows to roast on the crash-and-burn fire when "unique behind my firewall" isn't.
If I understand correctly, ipv6 will force me into using provider dependent globally unique address space.
Yes, as long as you don't run a LIR. (One can argue whether this is The Way, I don't agree, but basically, this is what stands for now)
Unless my provider of the day is required to assign me address space that is and/or permanently assigned and portable it does not meet my needs. Why not? I am not willing to renumber when I change providers.
You are stuck in a v4 model. Renumbering is fun and healthy. In a residential setting, it should be near automagic.
I have no problem using NAT to obtain connectivity from provider B using providers A address space internally.
Your applications might have issues. Mine do, and I don't like them complaining. Unique is Good(tm).
But that only works if provider A is prevented from reusing 'my' addresses if I terminate my contract.
They are not yours, and why bother anyway? Just digits. (if you say "security", wrong answer, go back and relearn.)
And what do I do if I build my network without ties to any provider? Can I go to ARIN to get globally unique address space, an ipv6 /48? Without RFC1918 that would be my only choice to prevent from overlapping my network with someone elses.
There is an issue here -- various schemes have been presented (research ships, planes, anything) that are exotic at best, yet we can't completely ignore them. However, I do not think non-unique prefixen are the way to go. See above under "mergers". -- Måns Nilsson Systems Specialist +46 70 681 7204 KTHNOC MN1334-RIPE