nanog mailing list archives
RE: Who is announcing bogons?
From: Sean Donelan <sean () donelan com>
Date: Mon, 28 Apr 2003 22:39:11 -0400 (EDT)
On Mon, 28 Apr 2003, McBurnett, Jim wrote:
I am not a BGP Guru by any means but as I see it: there are more than 25 /8 that should not be routed at all... And they are easily summarized.. some can be /6 or less... I never tried that.. But should work....
If Rob wanted to do it right :-) In 2001, approximately 33.5% of IPv4 address space was being announced in the global routing table. If you wanted to do complete negative filtering, you need to filter 66.5% of the IPv4 address space. http://www.apnic.net/stats/bgp/TOTAL/totaladd.html Unfortunately, all we have is a rather blunt tool. Its a bit like trying to fight credit card fraud by rejecting any card that doesn't begin with a 4 (Visa) or 5 (partial Mastercard range). It may work as a limited data entry check, but its not enough.
Current thread:
- RE: Who is announcing bogons? McBurnett, Jim (Apr 28)
- RE: Who is announcing bogons? Sean Donelan (Apr 28)
- RE: Who is announcing bogons? Stephen J. Wilcox (Apr 29)
- RE: Who is announcing bogons? Christopher L. Morrow (Apr 29)
- RE: Who is announcing bogons? Sean Donelan (Apr 28)