Policy Statement on Address Space Allocations
Andrew Partan asp at uunet.uu.net
Tue Jan 30 20:54:57 CET 1996
> If you're a backbone and connected into the area, within your network > you advertise the /8 outside the area and the details within the area. This is the free transit case. Provider X is connected into the area, so provider X has all of the more specific routes for that area. Provider X is also connected outside of the area, so provider X has 3 choices. 1) Provider X can announce the aggregate outside of the area & thus give free transit to the whole area; or 2) Provider X can announce just provider X's customers outside of the area, thus defeating the gain from aggregation; or 3) Provider X can be paid by everyone else in the area to provide transit to the entire area to where ever else Provider X connects to. So either you can't aggregate (case 2) or you get paid by more customers (case 3) or you end up with free transit (case 1). Now lets look at the situation where there are many of these areas and you have some provider connected to more than one of them (as most big providers will be). For every area that provider Y is connected to, provider Y has to carry full routes for the entire area - no aggregation. Humm - I think that we just lost again. --asp at uunet.uu.net (Andrew Partan)
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