Current prefix length filtering

Tue Nov 11 20:49:56 UTC 1997

On Tue, 11 Nov 1997, Forrest W. Christian wrote:

> The real question I have for nanog is who is filtering on 209/8 for
> prefixes longer than /18?  I'm quite concerned about connectivity to the
> customers I'm going to have to put in this /19.  Have all the major
> providers started filtering on /19's or am I going to have major problems
> with this block?

Most people who filter recently allocated part of 192/2 space filter on
/19s. Sprint originally filtered on /18s but relaxed that to coordinate
better with registry allocation policies.

-dorian