On Mon, Sep 11, 2006 at 10:28:49AM -0700, Vince Fuller wrote:
One might also imagine that more globally-friendly way to implement this would have been to build a network (VPN would be adequate) between the ground stations and assign each plane a prefix out of a block whose subnets are only dynamically advertsed within that network/VPN. Doing that would prevent the rest of the global Internet from having to track 1000+ routing changes per prefix per day as satellite handoffs are performed.
As has been said before, and is also readable in that blog entry: the system is supposed to create *one* advertisement change when the plane is crossing from the "Europe" to the "US" ground station (etc.), not 1000+.
The comment still applies. Imagine that this system were implemented globally on all international/intercontinental air routes. It would still be nice to avoid having each of those airplanes cause a globally-visible routing update whenever it crosses some geographical boundary. --Vince
Hello; On Sep 11, 2006, at 1:34 PM, Vince Fuller wrote:
On Mon, Sep 11, 2006 at 10:28:49AM -0700, Vince Fuller wrote:
One might also imagine that more globally-friendly way to implement this would have been to build a network (VPN would be adequate) between the ground stations and assign each plane a prefix out of a block whose subnets are only dynamically advertsed within that network/VPN. Doing that would prevent the rest of the global Internet from having to track 1000 + routing changes per prefix per day as satellite handoffs are performed.
As has been said before, and is also readable in that blog entry: the system is supposed to create *one* advertisement change when the plane is crossing from the "Europe" to the "US" ground station (etc.), not 1000+.
The comment still applies. Imagine that this system were implemented globally on all international/intercontinental air routes. It would still be nice to avoid having each of those airplanes cause a globally-visible routing update whenever it crosses some geographical boundary.
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.
--Vince
Regards Marshall
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.
participants (3)
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Marshall Eubanks -
Simon Leinen -
Vince Fuller