[158173] in North American Network Operators' Group
Re: Adding GPS location to IPv6 header
daemon@ATHENA.MIT.EDU (Eugen Leitl)
Sun Nov 25 12:13:37 2012
Date: Sun, 25 Nov 2012 18:13:23 +0100
From: Eugen Leitl <eugen@leitl.org>
To: nanog@nanog.org
In-Reply-To: <CAP-guGVCdtL9LT36APLs5eu7cxQiEfk-1uLaX3m0j6NFOgq58w@mail.gmail.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.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.
