nanog mailing list archives
Re: v6 subnet size for DSL & leased line customers
From: Mark Smith <nanog () 85d5b20a518b8f6864949bd940457dc124746ddc nosense org>
Date: Sun, 30 Dec 2007 10:46:09 +1030
On Sat, 29 Dec 2007 15:14:25 -0500 Marshall Eubanks <tme () multicasttech com> wrote:
On Dec 27, 2007, at 11:19 PM, Mark Smith wrote:On Fri, 28 Dec 2007 12:57:45 +0900 Randy Bush <randy () psg com> wrote:Ever calculated how many Ethernet nodes you can attach to a single LAN with 2^46 unicast addresses?you mean operationally successfully, or just for marketing glossies?Theoretically. What I find a bit hard to understand is peoples' seemingly complete acceptance of the 'gross' amount of ethernet address space there is available with 46 bits available for unicast addressing on a single LAN segment, yet confusion and struggle over the allocation of additional IPv6 bits addressing bits for the same purpose - the operational convenience of having addressing "work out of the box" or be simpler to understand and easier to work with. Once I realised that IPv6's fixed sized node addressing model was similar to Ethernet's, I then started wondering why Ethernet was like it was - and then found a paper that explains it : "48-bit Absolute Internet and Ethernet Host Numbers" http://ethernethistory.typepad.com/papers/HostNumbers.pdfWould it be possible to find the even part of this paper ? This version only has the odd numbered pages.
Hmm, you're right. The version I originally read was from somewhere else, and that was complete. I figured this one was more "original" as it's on one of the papers author's websites, so I've remembered that one, and even deleted my original electronic copy for this one. I'll try to find the other copy. Regards, Mark. -- "Sheep are slow and tasty, and therefore must remain constantly alert." - Bruce Schneier, "Beyond Fear"
Current thread:
- Re: v6 subnet size for DSL & leased line customers, (continued)
- Re: v6 subnet size for DSL & leased line customers Brandon Butterworth (Dec 24)
- Re: v6 subnet size for DSL & leased line customers Leigh Porter (Dec 25)
- RE: v6 subnet size for DSL & leased line customers John van Oppen (Dec 25)
- Re: v6 subnet size for DSL & leased line customers Scott Weeks (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Randy Bush (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Adrian Chadd (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Marshall Eubanks (Dec 29)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 29)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 29)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 27)
- Re: v6 subnet size for DSL & leased line customers Jeroen Massar (Dec 30)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 30)
- Re: v6 subnet size for DSL & leased line customers Joel Jaeggli (Dec 31)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 31)
- Re: v6 subnet size for DSL & leased line customers Mark Smith (Dec 31)