[73944] in North American Network Operators' Group
Re: ISP Policies
daemon@ATHENA.MIT.EDU (bmanning@vacation.karoshi.com)
Thu Sep 9 00:38:27 2004
Date: Thu, 9 Sep 2004 04:37:18 +0000
From: bmanning@vacation.karoshi.com
To: Tulip Rasputin <tulip_rasputin@yahoo.ca>
Cc: nanog@merit.edu
In-Reply-To: <003401c49625$857db160$e90218ac@Floyd>
Errors-To: owner-nanog-outgoing@merit.edu
yes.
On Thu, Sep 09, 2004 at 09:58:52AM +0530, Tulip Rasputin wrote:
>
> Hi,
>
> I have a general policy question.
>
> Do the ISPs ever look for some particular AS number in the BGP AS_PATH and
> then decide what action/preference/priority they need to take/give based on
> the AS number(s) present in the BGP AS_PATH_SEQ/SET? For instance, does it
> happen that an ISP receives some BGP paths, but because of some political,
> social, economical, DOS attack, etc. reasons decides that it doesn't want
> to accept this path because some particular AS number is present in the BGP
> UPDATE.
>
> Basically, it doesn't want *its* traffic to flow via that particular AS
> number(s).
>
> Or, if there is a mutual disagreement between two ISPs, and one doesn't
> want his traffic to traverse the other's AS number.
>
> Does this sort of thing ever happen? Are such restrictive policies normal
> in the ISP/IX scenarios?
>
> Thanks,
> Tulip
>
