v6 subnet size for DSL & leased line customers

Marshall Eubanks tme at multicasttech.com
Sat Dec 29 20:14:25 UTC 2007


On Dec 27, 2007, at 11:19 PM, Mark Smith wrote:

>
> On Fri, 28 Dec 2007 12:57:45 +0900
> Randy Bush <randy at 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.pdf
>

Would it be possible to find the even part of this paper ? This  
version only has the odd numbered pages.

Regards
Marshall


> Regards,
> Mark.
>
> -- 
>
>         "Sheep are slow and tasty, and therefore must remain  
> constantly
>          alert."
>                                    - Bruce Schneier, "Beyond Fear"




More information about the NANOG mailing list