[7811] in North American Network Operators' Group
Re: BGP announcements and small providers
daemon@ATHENA.MIT.EDU (Paul Ferguson)
Tue Feb 25 10:57:53 1997
Date: Tue, 25 Feb 1997 10:50:44 -0500
To: David Papp <david@oanet.com>
From: Paul Ferguson <pferguso@cisco.com>
Cc: Avi Freedman <freedman@netaxs.com>, jgonz@ibernet.es, nanog@merit.edu
Well, without naming names, the prefix-length based filtering is
done on non-customer routes. A byproduct of this is it grudgingly
encourages aggregation.
- paul
At 08:32 AM 2/25/97 -0700, David Papp wrote:
>Isn't it true though that some upstream providers (such as Sprint) filter
>out anything smaller than /19 and will not carry those routes? Therefore
>in this example, Sprint clients would not be able to see these smaller
>providers and vice versa unless he agregates them to /19 or higher and
>then announces the routes himself?
>
>...David
>
>* David Papp | 4907-99 Street | Ph: +1.403.430.0811 *
>* Manager | Edmonton, Alberta | Fax: +1.403.436.9963 *
>* OA Internet Inc. | Canada, T6E 4Y1 | Email: david@oanet.com *
>
>On Tue, 25 Feb 1997, Paul Ferguson wrote:
>> If the downstream customers are not multihomed, there's no reason
>> to run BGP with them; a simple default/static will work just fine.
>> Also, if you suballocate addresses to them from within your address
>> space, you can aggregate them.
>>
>> This is generally considered a Good Thing.
>>
>> - paul
>
>
>
