[ipv6-wg] RE: [address-policy-wg] IPv6 allocations for 6RD
Remco van Mook Remco.vanMook at eu.equinix.com
Thu Nov 26 10:24:21 CET 2009
Fair enough, I'll bite. Given 2^32(or 4 billion) IPv4 addresses, and say, 4 million IP's allocated to the average ISP (I'm being generous here) there's your 0.1%. The rest of the space will go unused since we're using 32 bits to identify these sparse blocks in the v4->v6 translation. Not counting customer /56s, 48s, /60s or whatever. The more dangerous bit here is that you're going to have a hard time using the other pieces of that 32 bits you've allocated to 6rd elsewhere - it'll only give you v6 for people you're currently handing out a v4 address as well. I agree that handing an ISP a /24 should last them an eternity, but only if they make sensible use of it. Remco -----Original Message----- From: address-policy-wg-admin at ripe.net [mailto:address-policy-wg-admin at ripe.net] On Behalf Of michael.dillon at bt.com Sent: donderdag 26 november 2009 10:12 To: address-policy-wg at ripe.net; ipv6-wg at ripe.net Subject: RE: [address-policy-wg] IPv6 allocations for 6RD > If a single 6rd instance is accepted as a rule the end result > of that will be that every ISP in the world with > non-contiguous allocations will be asking for a /24 next, > knowing full well that they're only going to use 0,1% of the > network side of that space, ever. A lot of numbers have been thrown around fairly casually in this conversation, but /24 is a nice one to focus on because everyone understands how many /24s there are in a number space. If we could have run the IPv4 Internet by only giving every ISP a single /24, then we would never have run out of IPv4 addresses. Conversely, giving every ISP an IPv6 /24 is not radical and is not even wasteful given the large number of /24s that we have in stock at RIPE and at IANA. As for your comment about 0.1%, I'd like to know how you calculated that number. In general, I'm only interested in numbers that count /56s (or /48s) and /32s since those are the only ones that are meaningful in making policy. --Michael Dillon This email is from Equinix Europe Limited or one of its associated/subsidiary companies. This email, and any files transmitted with it, contains information which is confidential, may be legally privileged and is solely for the use of the intended recipient. If you have received this email in error, please notify the sender and delete this email immediately. Equinix Europe Limited. Registered Office: Quadrant House, Floor 6, 17 Thomas More Street, Thomas More Square, London E1W 1YW. Registered in England and Wales No. 6293383.
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