We have been filtering subnets of As (except 39) Bs and Cs for 5 months -- but outbound, not inbound (ie nobody behind us can announce these things except by special arrangement; we still hear other people's funny stuff). One problem we see is European offices/branches of US companies who want to use parts of their "company B" for a European connection, instead of using local provider space; filtering subnets is a good incentive for them to overcome that desire. It's clear that the Net needs fewer announcements and this is one way to go; and by filtering essentially "rogue" networks inbound (towards presumably interesting things), one likewise provides an incentive for better aggregation. However, I think Sprint's approach is rather heavy-handed and probably a toad counter-productive in the long run. I would consider it reasonable for Sprint to filter their own funny stuff (like we have done) for a considerable length of time before filtering other people's funny stuff; if for no other reason than proof of concept on home ground. Plus stones and glasshouses, etc. -- ====== ___ === Per G. Bilse, Mgr Network Operations Ctr ===== / / / __ ___ _/_ ==== EUnet Communications Services B.V. ==== /--- / / / / /__/ / ===== Singel 540, 1017 AZ Amsterdam, NL === /___ /__/ / / /__ / ====== tel: +31 20 6233803, fax: +31 20 6224657 === ======= 24hr emergency number: +31 20 421 0865 === Connecting Europe since 1982 === http://www.EU.net; e-mail: bilse@EU.net