nanog mailing list archives
Re: Private use of non-RFC1918 IP space (IPv6-MW)
From: Scott Howard <scott () doc net au>
Date: Wed, 4 Feb 2009 15:56:44 -0800
On Mon, Feb 2, 2009 at 9:30 PM, Anthony Roberts <nanog () arbitraryconstant com
wrote:
It has been my experience that when you give someone a huge address space to play with (eg 10/8), they start doing things like using bits in the address as flags for things. Suddenly you find yourself using a prefix that should enough for a decent sized country in a half-rack.
Which is, of course, a core design philosophy for IPv6. Stateless autoconfig relies on the fact that each network will be allocated 2^64 address. On Mon, Feb 2, 2009 at 9:35 PM, Patrick W. Gilmore <patrick () ianai net>wrote:
Except the RIRs won't give you another /48 when you have only used one trillion IP addresses.
Of course they will! A /48 is only the equivalent of 65536 "networks" (each network being a /64). Presuming that ISPs allocate /64 networks to each connected subscriber, then a /48 is only 65k subscribers, or say around a maximum of 200k IP addresses in use at any one time (presuming no NAT and an average of 3-4 IP-based devices per subscriber) IPv4-style utilization ratios do make some sense under IPv6, but not at the address level - only at the network level. Scott.
Current thread:
- Re: Private use of non-RFC1918 IP space, (continued)
- Re: Private use of non-RFC1918 IP space Valdis . Kletnieks (Feb 02)
- Re: Private use of non-RFC1918 IP space Anthony Roberts (Feb 02)
- Re: Private use of non-RFC1918 IP space Patrick W. Gilmore (Feb 02)
- Re: Private use of non-RFC1918 IP space Mark Andrews (Feb 02)
- Re: Private use of non-RFC1918 IP space Patrick W. Gilmore (Feb 03)
- IPv6 space (was: RE: Private use of non-RFC1918 IP space ) Deepak Jain (Feb 03)
- Re: Private use of non-RFC1918 IP space Stephen Sprunk (Feb 02)
- Re: Private use of non-RFC1918 IP space Patrick W. Gilmore (Feb 03)
- Re: Private use of non-RFC1918 IP space Trey Darley (Feb 03)
- Re: Private use of non-RFC1918 IP space Heather Schiller (Feb 03)
- Re: Private use of non-RFC1918 IP space (IPv6-MW) Scott Howard (Feb 04)
- Re: Private use of non-RFC1918 IP space (IPv6-MW) Patrick W. Gilmore (Feb 04)
- Re: Private use of non-RFC1918 IP space (IPv6-MW) Seth Mattinen (Feb 04)
- v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Patrick W. Gilmore (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Howard C. Berkowitz (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Matthew Moyle-Croft (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Mark Andrews (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Matthew Moyle-Croft (Feb 04)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Jack Bates (Feb 05)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Iljitsch van Beijnum (Feb 05)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space (IPv6-MW)] Anthony Roberts (Feb 04)