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From: Simon Leinen <simon@limmat.switch.ch> To: Marshall Eubanks <tme@multicasttech.com> Cc: Vince Fuller <vaf@cisco.com>, Gert Doering <gert@Space.Net>, Oliver Bartels <oliver@bartels.de>, "cidr-report@potaroo.net" <cidr-report@potaroo.net>, "nanog@merit.edu" <nanog@merit.edu>, "routing-wg@ripe.net" <routing-wg@ripe.net> In-Reply-To: <49E82B9B-2274-4B61-B88D-000C6261EE5D@multicasttech.com> (Marshall Eubanks's message of "Mon, 11 Sep 2006 13:54:54 -0400") Date: Wed, 13 Sep 2006 23:56:00 +0200 Errors-To: owner-nanog@merit.edu Marshall Eubanks writes: > In a typical flight Europe / China I believe that there would be > order 10-15 satellite transponder / ground station changes. The > satellite footprints count for more that the geography. What I remember from the Connexion presentations is that they used only four ground stations to cover more or less the entire Northern hemisphere. I think the places were something like Lenk (Switzerland), Moscow, Tokyo, and somewhere in the Central U.S.. So a Europe->China flight should involve just one or two handoffs (Switzerland->Moscow(->Tokyo?)). Each ground station has a different ISP, and the airplane's /24 is re-announced from a different origin AS after the handoff. It's possible that there are additional satellite/transponder changes, but those wouldn't be visible in BGP. -- Simon.
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