ISP Policies

Thu Sep 9 04:37:18 UTC 2004


	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
>