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Re: using IRR tools for BGP route filtering
From: Danny McPherson <danny () tcb net>
Date: Thu, 22 Jun 2000 08:36:21 -0600



      AS Path filtering would be much smaller than prefix based filtering.
Perhaps small enough to work on existing routers. These filters could also
be built using registry data, from the ASes that make up providers' as-macros.
      Not a silver bullet, but probably significantly better than doing
nothing.

Though it's certainly better than nothing, it does little more than 
ensure AS_PATH sequence and integrity .. it provides no protection 
against invalid announcements.

-danny




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