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Re: FW: /8s and filtering

  • From: David Schwartz
  • Date: Tue Dec 10 17:00:05 2002


On Tue, 10 Dec 2002 12:45:42 -0800 (PST), Harsha Narayan wrote:

>Doesn't this mean that unless filtering policies change, after Class C
>space is used up, the multihomer will have to get a /22 from the ISP
>(since after Class C gets used up allocations will be made from Class A
>space). There are only three /8s left in the Class C space.

	No. Providers who you don't pay to carry your route can reach you through 
the larger aggregate. In fact, even the /24 requirement can be ignored if all 
your providers reach each other directly or can convince their transit 
providers to carry smaller routes.

	DS






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