Network path measurement method, apparatus, and system

A network path measurement method, comprising:

• obtaining, by a third switching node in a Clos switching network, a first available bandwidth of a path from a first target port of the third switching node to a first switching node, wherein the third switching node is a next-stage switching node connected to the first switching node;
• obtaining, by the third switching node, a third aggregate available bandwidth of a path from the first switching node to a fourth switching node, wherein the fourth switching node and the third switching node are same-stage switching nodes;
• and
• determining, by the third switching node, a second aggregate available bandwidth of a path from the first target port of the third switching node to the fourth switching node, wherein the second aggregate available bandwidth is a smaller available bandwidth of the first available bandwidth and the third aggregate available bandwidth.

A network path measurement apparatus, wherein the apparatus is a first switching node in a Clos switching network, and comprises a communications interface and a processor, wherein

• the processor is configured to obtain, using the communications interface, a first aggregate available bandwidth of a path from the first switching node to a second switching node, wherein the first switching node and the second switching node are same-stage switching nodes in the Clos switching network;
• the processor is further configured to obtain, using the communications interface, a first available bandwidth of a path from a first target port of a third switching node to the first switching node, wherein the third switching node is a next-stage switching node connected to the first switching node;
• the processor is further configured to obtain, using the communications interface, a second available bandwidth of a path from the second switching node to a fourth switching node, wherein the fourth switching node is a next-stage switching node connected to the second switching node;
• and
• the processor is further configured to determine a second aggregate available bandwidth of a path from the first target port of the third switching node to the fourth switching node, wherein the second aggregate available bandwidth is a smallest available bandwidth from among the first aggregate available bandwidth, the first available bandwidth, and the second available bandwidth.

A network path measurement apparatus, wherein the apparatus is a third switching node in a Clos switching network, and comprises a processor and a communications interface, wherein

• the processor is configured to obtain, using the communications interface, a first available bandwidth of a path from a first target port of the third switching node to a first switching node, wherein the third switching node is a next-stage switching node connected to the first switching node;
• the processor is further configured to obtain, using the communications interface, a third aggregate available bandwidth of a path from the first switching node to a fourth switching node, wherein the fourth switching node and the third switching node are same-stage switching nodes;
• and
• the processor is further configured to determine a second aggregate available bandwidth of a path from the first target port of the third switching node to the fourth switching node, wherein the second aggregate available bandwidth is a smaller available bandwidth of the first available bandwidth and the third aggregate available bandwidth.