BGP Path Filtering

Leo Bicknell bicknell at
Sat May 17 00:16:20 UTC 2003

In a message written on Fri, May 16, 2003 at 08:10:22PM -0400, Sean Donelan wrote:
> I said *EVERY* network prefix from *EVERY* source.  I didn't limit it to
> just customers.  ANS also filtered peers.

Mea Culpa.

Of course, we see where that got ANS.

I'd be content if even half the provides out there filtered half
their customers.  That would be a quantum leap forward from today.

I can think of more than a few "Tier 1" ISP's that allow a filter
of "as-path ^custasn.*$" and call that a filter.  *sigh*

       Leo Bicknell - bicknell at - CCIE 3440
        PGP keys at
Read TMBG List - tmbg-list-request at,
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 187 bytes
Desc: not available
URL: <>

More information about the NANOG mailing list