Routescience?

Tue Aug 21 07:12:58 UTC 2001

Randy Bush wrote:
> > Vadim,
> >
> >    we recognize, and appreciate your concerns.
> >
> > Two major points with regard to the PathControl product,
> > and it's impact on the BGP environments:
> >
> >   1) PathControl is currently targeted toward providing
> >      optimized egress routes to multihomed enterprises.
> >      Our technology is applicable to core routing, but
> >      we certainly acknowledge the constraints in that
> >      environment are radically different ...
> >
> >   2) We've integrated extensive anti-flapping capabilities
> >      into the product, and in addition have user-configurable
> >      settings for maximum rate of route change.
> >
> > Given a high rate of changing performance measurements, the box
> > is capable of generating routing decisions at a high rate.
> > Our analysis (and default settings) show that significant
> > performance gains can be realized with a rate of change in
> > typical deployments less than ~100 prefix changes per hour.
> > (And maximum rates can be constrained lower than this,
> > if desired.)
> 
> you're doing releasing just the perfect kind of sheep to graze the routing
> commons of which i have been speaking, for example see
> <http://psg.com/~randy/010809.ptomaine.pdf>,
> 
> folk, it's time to get those prefix length filters in before the real
> /22-/24 pollution gets really crazy.

Randy, 

  please allow me to make clear ... 

The PathControl product does *not* add routes to anyone's table;
it merely provides multihomed "leaf AS's" the ability to make 
informed decisions about how to use the routes that their service
providers give to them.