Patent ID: 8675502

Claim:
A single network device, comprising: a plurality of network interfaces for coupling with one or more networks for communicating packets with a remote device, wherein each of the plurality of network interfaces has assigned to it a different network address; and a one-way path delay measurer configured to cause a plurality of probe packets to be sent from the single network device to the remote device for causing a corresponding plurality of return packets to be received by the single network device; wherein said configuration includes to generate the plurality of probe packets, with each of the plurality of probe packets including a different source address corresponding to said different network address of a different network interface of the plurality of network interfaces, and including a same destination address of the remote device in order to cause each of the plurality of probe packets to traverse a same path from a single interface of the plurality of network interfaces from which each of the plurality of probe packets is to be sent to the remote device, and to cause each of the corresponding plurality of return packets to traverse a different path through said one or more networks and arriving on a different particular network interface of the plurality of network interfaces, with said different particular network interface corresponding to the different source address of said corresponding probe packet of the plurality of probe packets; wherein the one-way path delay measurer is configured to determine the relative one-way path measurements from the remote device to the single network device based on the round-trip times of said probe packets sent to the remote device and their corresponding return packets.