[c-nsp] AS-prepending

[Michael Lyngbøl]

On 12.10.2005 09:36:57 +0200, Vincent De Keyzer wrote:
> Hello,
> 
>  
> 
> as an ISP, I need to limit the traffic that I receive *from* one of my two
> upstream providers.
> 
>  
> 
> I was thinking of AS-prepending. Is it the best method ?

Yes.

Your upstream provider my also support BGP communities to
prepend/suppress towards selected peers.

> If yes, can
> somebody point me to a document that gives a recipe for this?

apply an out-bound route-map to the BGP neighbor, and use some thing
like this:

route-map BGP-OUT permit 10
 set as-path prepend <my-as#>

/Michael