Abstract: A method and an apparatus for implementing delay measurement. The method includes: determining, by a measurement apparatus, a delay T0 generated when a first packet is transmitted at a first priority over a first loopback path that includes a first sub-path and a second sub-path; determining a delay T1 generated when a second packet is transmitted over a second loopback path that includes the first sub-path, the second sub-path, a third sub-path, and a fourth sub-path, where the second packet is transmitted at the first priority over the first sub-path and the second sub-path and is transmitted at a second priority over the third sub-path and the fourth sub-path; and determining a delay according to T0 and T1. Therefore a delay can be measured only by implementing a measurement function in the measurement apparatus, thereby resolving a problem of complex implementation.

Abstract: A method and an apparatus for implementing delay measurement. The method includes: determining, by a measurement apparatus, a delay T0 generated when a first packet is transmitted at a first priority over a first loopback path that includes a first sub-path and a second sub-path; determining a delay T1 generated when a second packet is transmitted over a second loopback path that includes the first sub-path, the second sub-path, a third sub-path, and a fourth sub-path, where the second packet is transmitted at the first priority over the first sub-path and the second sub-path and is transmitted at a second priority over the third sub-path and the fourth sub-path; and determining a delay according to T0 and T1. Therefore a delay can be measured only by implementing a measurement function in the measurement apparatus, thereby resolving a problem of complex implementation.

Abstract: A method, an apparatus, and a system for implementing packet loss detection. The method includes: determining, by a detection apparatus, there is no packet loss when packet transmission is performed at a first priority over a first loopback path that includes a first subpath and a second subpath; sending N1 packets over a second loopback path that includes the first subpath, the second subpath, a third subpath, and a fourth subpath, where the packets are transmitted at the first priority over the first subpath and the second subpath, and are transmitted at a second priority over the third subpath and the fourth subpath; and determining a packet loss rate according to N1 and a quantity N2 of received packets returned over the second loopback path. Therefore, a packet loss rate can be detected only by implementing a detection function on a detection apparatus, thereby resolving a problem of complex implementation.