Why would that work? If I see a /16 from my customer and a /19 from a peer, I will still pick the /19, and strict uRPF should drop any

packets from that /19 coming the customer interface, right? Ah yes, I wasn't thinking strict enough indeed :) Good point. This message and any attachments (the "message") is intended solely for the addressees and is confidential. If you receive this message in error, please delete it and immediately notify the sender. Any use not in accord with its purpose, any dissemination or disclosure, either whole or partial, is prohibited except formal approval. The internet can not guarantee the integrity of this message. BNP PARIBAS (and its subsidiaries) shall (will) not therefore be liable for the message if modified. ********************************************************************************************** BNP Paribas Private Bank London Branch is authorised by CECEI & AMF and is regulated by the Financial Services Authority for the conduct of its investment business in the United Kingdom. BNP Paribas Securities Services London Branch is authorised by CECEI & AMF and is regulated by the Financial Services Authority for the conduct of its investment business in the United Kingdom. BNP Paribas Fund Services UK Limited is authorised and regulated by the Financial Services Authority.