RE: [routing-wg]Routing Aggregation Policy

["Barry Greene \(bgreene\)" <]

> On Wed, Oct 12, 2005 at 07:52:53AM -0700, Barry Greene 
> (bgreene) wrote:
> > Why not look at the exiting BGP policy tool we have today in 12.0S, 
> > 12.2S, Junos, and IOX to see if it can be a configurable 
> policy - if 
> > it is not - draft a new feature description. You got both 
> vendor here. 
> > I've done this in other SP Security forums.
> 
> I don't really understand how this is going to work.  What 
> can the routers do here?  "Auto-De-Peer this neighbor if the 
> aggregation ratio is bad"?

People where saying the same thing when we started the Bogon Prefix
filtering project. The side effect of the Bogon project is a limit on
the de-aggregation. Strict and Loose both have limits on the largest
prefix allowed through. That is why we do not see /28s all over the
place. 

So if you look at this policy idea and think - how would I like BGP code
to filter to enforce this. You add it into the RIPE document as a
recommendation to the vendors. The vendors then go out and add the
filtering capabilities to match the RIPE policy.