Are you suggesting that the Tier 1 and 2's that I connect to are not filtering out anything shorter than /24? My expectation is that they are dropping shorter than /24, just like I am.
Correct me if I'm wrong, but every *NOG BGP best practices document I've read has advocated dropping all prefixes shorter than /24 at ingress and egress. On Fri, Oct 2, 2015 at 11:34 AM, William Herrin <b...@herrin.us> wrote: > On Fri, Oct 2, 2015 at 11:55 AM, Suresh Ramasubramanian > <ops.li...@gmail.com> wrote: > > Besides which more than one provider filters by a minimum prefix length > > per /8 - wasn't Swisscom or someone similar doing that? So multi > > homing with even a /24 is somewhat patchy in terms of effectiveness > > Hi Suresh, > > That hasn't been true for something like a decade. Anybody who filters > anything shorter than /24 without also taking a default route (or the > equivalent) is not fully connected to the Internet. > > Regards, > Bill Herrin > > > > -- > William Herrin ................ her...@dirtside.com b...@herrin.us > Owner, Dirtside Systems ......... Web: <http://www.dirtside.com/> >