Vadim,

...

Following Dales comment, each provider may set its own parameters on generation of configurations, regardless of where it gets its data from.

Sorry, the only available technology today is heavily taxed even w/o doing massive filtering.

Hey, have I got a deal for you!! Exhausted from peering with 10 or more ASs at an exchange point? Like to spend more of your time switching packets? Think the load is only going to get worse in the future? Get your routes from a Route Server! One Peer; No Fuss. Call 1-800-Routing-Arbiter. No Credit Cards needed. --Dale (PS: None of the Routing Registry, the Route Servers, or the Router Configuration Generation Tools are tied to net-based filtering. You can register your policy in RIPE-181/RPSL, and tell the generation tools (both for your routers and for the Route Server) to implement your policy with AS-path expressions rather than with net lists. Your mileage may vary.)