North American Network Operators Group

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Re: weird BGP cisco-ism? [problem resolved]

  • From: Chris Garner
  • Date: Fri Jul 11 22:00:30 1997

>
>
>> 	I'd think prefix based filters would be more likely to be correct.
>> Since you have to explicitly list what you think you should be announcing
>> you protect against having routes you don't expect in your tables and
>> against having interactions that cause unexpected routes to get tagged as
>> announceable.
>> 
>
>OK, so then what do you do with BGP customers?  Ideally, you'd be filtering 
>the ingress advertisements from your customers.  Now you have to add those 
>prefixes to your egress filters as well.
>
>Using communities to accomplish this is much more efficient and "hands-off".
>
>-danny
>
>
>

	You can build your customer BGP filters off data in the IRR.  Make
it a requirement that BGP customers must keep that information up to date
(or do it for them).

-- 

                                -Chris ([email protected])