Patent ID: 8102763

Claim:
A backpressure method of the multistage switching network, comprising: receiving backpressure information sent from a lower stage switching node, by an intermediate switching node; sending, by the intermediate switching node, at least part of the backpressure information to an upper stage switching node; and the intermediate switching node continuing to send data packets corresponding to the at least part of the backpressure information to the lower stage switching node; wherein the backpressure information is for instructing the upper stage switching node not to send packets until the upper stage switching node is instructed to send packets; the method further comprising: classifying the backpressure information into non-responded backpressure information and responded backpressure information, wherein the non-responded backpressure information is the at least part of the backpressure information; stopping sending data packets corresponding to the responded backpressure information to the lower stage switching node; and sending the non-responded backpressure information to the upper stage switching node.