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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Who is announcing bogons?
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. > > >
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