Spread Spectrum IP Addressing - SOURCE Address Field ROTATED|shifted? Left 2 Bits

Sun Mar 4 03:03:13 UTC 2012

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Goes together well..
On Mar 3, 2012 1:34 PM, "Guru NANOG" <nanog.guru at gmail.com> wrote:

> Common Misconception
>
> With Spread Spectrum IP Addressing the 32-bit Source Address Field is
> Shifted LEFT 2-bits by the originator of the packet.
>
> That Folds the IPv4 Legacy Address Space into 1/4th tsize table
>
> The lost 2-bits are stored in the Right-Most 2 bits of the 32-bit
> field and in other places in the IPv4 Header
>
> The Destination can easily recover the Source Address - if the proper
> algorithms are in use
>
> Responses blindly sent back to the shifted Source Address may fall
> into agile hands or not
>
> With the advanced Spread-Spectrum techniques, additional addressing
> bits are created from the noise intentionally stored in the Right-Most
> 2 bits
>
> NANOG Operators buying /8s or /6s may want to look at the
> Spread-Spectrum CODE in the Linux-based CPE Routers
>
> The following table is deprecated and 1/4th the size:
> http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.txt
>
> With Spread-Spectrum collisions and mis-directions are OK and expected but
> other
> techniques ensure the packets get to the right place.
>
> http://NANOG.GURU
>
>