In article <02DAE179D5CEED4C992055C823ED90FF107333@ex1> you wrote: > However, we want to keep this communication between the two boxes private > and it will not be visible to the customer when we ship our system > (consisting of two boxes). Given that our customer can configure any IP > address to the Ethernet interface, we want to assign a unique IP address > to the p2p link, or to come up with a way to address the other side. Note > that we do not have knowledge of the IP address the customer would choose > for the Ethernet interface. Will the customer assign one or two addresses (to each side). You dont need to have a ip on yout ptp link interfaces. Just use the same ip as the ethernet interface and use device routes. Greetings Bernd -- eckes privat - http://www.eckes.org/ Project Freefire - http://www.freefire.org/ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html