On 04/02/14 15:24, John R. Levine wrote:
If ISP has customer A with multiple *known* valid networks --doesn't
matter if ISP allocated them to customer or not-- and ISP lets them
all out, but filters everything else, ISP is still complying with BCP 38.
Of course. The question is how the ISP knows what the customer's
address ranges are, without demanding vast amounts of nitpicky manual
work on both sides.
The same way BGP outbound prefix filters are applied nowadays, would be
a good start. Some have BGP filtering but don't have ACLs.
