I wrote:

Filter

To clarify and avoid accusations of hypocrisy, I continue to believe that progressive route-flap dampening is a reasonable alternative, and results in far fewer "help, i can't get through your network" calls to your NOC. Perhaps that indicates flap-dampened networks aren't nearly as often in the process of trying to be used as brand-new long prefixes? Sean. PS http://www.ripe.net/docs/ripe-210.html and the network i am involved with does use this