AW: AW: [address-policy-wg] IPv6 allocations for 6RD
- Previous message (by thread): AW: AW: [address-policy-wg] IPv6 allocations for 6RD
- Next message (by thread): [address-policy-wg] an arithmetic lesson
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
michael.dillon at bt.com
michael.dillon at bt.com
Thu Dec 3 11:00:22 CET 2009
> Seems a bit questionable to me to allocate the IPv6 > equivalent of class As when we haven't the slightest idea how > things will evolve and we have experience in blowing through > an "inconceivably large address space". The IPv6 equivalent of a class A address block is a /8. We are not talking about allocating /8s to anyone, we are mainly talking about allocating /24s which are the equivalent of IPv4 class C blocks. This is one area where the IPv4 arithmetic and IPv6 arithemetic match up nicely. If you are worried about using up all the addresses, an IPv6 /24 and an IPv4 /24 use up the same percentage of the total address space. The very fact that we are discussing allocations in the region of /19 to /24 demonstrates the success of IPv6 in expanding the size of the address space. In IPv4, a really big ISP would get a /8. In IPv6 we can handle a really big ISP with one /13 and a medium sized ISP can fit into a /32, which in IPv4 can only handle a single host. When discussing the risk of runout, you have to look at actual numbers and actual percentages of the total number space. I suggest examining some of Geoff Huston's work in more detail. --Michael Dillon
- Previous message (by thread): AW: AW: [address-policy-wg] IPv6 allocations for 6RD
- Next message (by thread): [address-policy-wg] an arithmetic lesson
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]