On 4/02/2009, at 12:25 PM, Owen DeLong wrote:
There is the ULA-Random space, but, I'm not sure if that got ratified or was rescinded. I really don't see a need for RFC-1918 in the IPv6 world. RFC-1918 was intended to solve a problem with a shortage of address space by allowing disparate private networks to recycle the same numbers behind NAT or for use on non-connected networks. There is no such shortage in IPv6. I think it is wiser to number non-connected IPv6 networks from valid unique addresses since there is no shortage.
ULA is useful for organisations that cannot get an RIR allocation/ assignment, so are likely to need to re-number. If they number on ULA *in addition to* whatever space their ISP gives them, they do not need to alter any internal DNS, ACLs, etc. etc. if/ when they re-number. An easy example of a good use for ULA might be the internal recursive DNS server addresses that the DHCPv6 server hands out. If they are so inclined, they might even re-number dynamically if they get their prefix using PD. -- Nathan Ward