North American Network Operators Group
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Historical
RE: Who is announcing bogons?
- From: Stephen J. Wilcox
- Date: Tue Apr 29 05:29:34 2003
On Mon, 28 Apr 2003, Sean Donelan wrote:
>
> 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.
But probably 50% or more of that is contained in large aggregatable blocks...
Steve
> 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.
>
>
>
|
