In einer eMail vom 22.11.2007 10:33:37 Westeuropäische Normalzeit schreibt
iljitsch@muada.com:
I understand this to be geographic routing, which goes even further But this one is different, and that's why ( my guess) you are mistaken
,next.
The link weight for each loose =hierarchical link is equal to the number of
hereby required physical hops.
Hence stretch is equal 1, and in case your router in Scotland is just one
hop away than
If your router in Scotland is just one hop away than you are "closer to
Scotland than to Belgium" though being in Holland. Nira works like in an
OSPF-network, however whereby the network is deminished the more the nodes are
further away.
>The way to solve this would be to lift the geo/topo alignment >requirement as soon as you reach a certain zoom level. As soon as the current router is marked with the same geo-date as is the
packet's destination, any other classic method shall apply (OSPF or BGP).
But then
there's the traditional argument against geographic aggregation: how do you avoid ISPs having to carry traffic for free? In other words: who announces the aggregates to the rest of the world? You mean to the rest of this geo-patch (remember: no worldwide routing
churn! ) ! Well just like it is done in OSPF. Hereby, across any two adjacent
ISPs, aggregates shall be announced :
The representative node from ISP A which has a loose=hierarchical link to
some representative node from ISP B shall indeed announce not only his own
reachability info, but also that one of all its surrounding ISP-A- nodes, which
are closer to it than to any other representative node.
>Are you familiar with Tony Hain's draft about geographic addressing? No, I am not. But believe me, I am absolutely in accordance with
link-state-protocols. I am not in favor of exploiting country codes, nor of
any other geo-political information. The goal is just to "thin" the too big
internet. If I want to travel von Munich to Manhattan 42 street, I do not care
about any road blockage as long as I haven't reached New York ! It wouldn't
impact by decision to make the best next hop towards the airport for
departure.
Heiner
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