Re: Adding GPS location to IPv6 header

[Eugen Leitl <eugen () leitl org>]

On Sun, Nov 25, 2012 at 12:08:15PM -0500, William Herrin wrote:
> On Sun, Nov 25, 2012 at 7:30 AM, Ammar Salih <ammar.salih () auis edu iq> wrote:
> > 2- Layer 7 will not be detected by layer 3 devices (routers) .. so
> > location-based service on layer-3 will not be possible.
>
> Geographic-based layer 3 routing has been thoroughly discussed on the
> IRTF RRG and just as thoroughly rejected. It's wholly inadequate as an
> approximation for topographic locality within the network graph.

If relativistic latency component is measurable, that is information
useful for mutual time of flight triangulation. WGS84 just gives you
a convenient hinge to hang your information on.
 
> Uses of geolocation information at layer 3 are similar to uses of the
> "evil bit."

You're correct. It's for layer 2 strictly.