Patent ID: 8780731

Claim:
An apparatus comprising: a processor; and a memory comprising: a probe generator executable with the processor to generate a probe comprising a connectivity check request frame, the connectivity check request frame comprising source identification data associated with a source router and probe data associated with the probe; a sender module executable with the processor to transmit the connectivity check request frame from the source router to a destination router, the destination router including an information base comprising a state of each of a plurality of sources, the sources including the source router, the state of the source router identified in the information base by a key formed from the source identification data and the source probe data; a receiver module executable with the processor to receive a reply from the destination router that is transmitted in response to receipt of the connectivity check request frame at the destination router; and a performance monitoring module executable with the processor to determine a round trip time between the source router and the destination router based on a time of receipt of the reply and a time of transmission of the connectivity check request frame.