Re: Filters and reality

["Paul G. Donner" <pdonner () cisco com>]

At 08:32 AM 8/27/97 +0900, David R. Conrad wrote:
> [Apologies for an (almost technical) post from outside NA to NANOG]
>
> Hi,
>
> > Should we continue to poke holes in our filters to let Sprint's customer's
> > customer routes through, or should we keep trying to explain to the Sprint
> > NOC why their customer's customers could use shorter prefix length
> > announcements?
>
> I suppose it depends on what slope you want the graph at
> http://www.iepg.org/ops/bgptable.html to have.  Regardless of whether
> the filters are a "good idea" or not, they do tend to limit routing
> table growth and its implications, if for no other reason than smaller
> sites are "encouraged" to go to their providers for address space due
> to fear of being filtered.

No argument there, but what about more consistency in filtering which *might*
lead to more predictability in routing behavior?  Given, diversity in
address assignment (as well as policy) serves as a cause the variation in 
filtering policy.

- donner

> Regards,
> -drc