North American Network Operators Group

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Re: using IRR tools for BGP route filtering

  • From: Danny McPherson
  • Date: Thu Jun 22 15:16:25 2000

I agree with this, and have seen the document, and have worked for 
large providers that performed prefix filtering on customers long
before IOPS existed.  

However, if every ISP performed prefix-based filtering between one 
another, it'd be improved "a lot more".  I recall more than a few 
instances when providers inadvertently broke other providers customers 
by "mis-advertising" prefixes.  

And if every ISP performed SA verification between one another 
(presumably with the same filters) it would again be improved "a 
lot" more.


> If every ISP does prefix based filtering on its
> downstream customers, the integrity of the Internet
> routing system will be improved a lot. The document
> below proposes such a model: