Patent ID: 9742656
Date: 2017-08-22
CPC Classifications: H04L

Claim:
1. A method for acquiring, by a switch device in a software defined network SDN, an exact flow entry, applied to a second switch device in the SDN, wherein the second switch device is connected to a first switch device and an controller device in the SDN, to form an SDN network, the controller device communicates with each switch device in an inband communication manner, and the method comprises: receiving a first control message sent by the first switch device and used for collecting path information, wherein the first control message carries path information of the first switch device, and the first control message is carried in a packet according to a protocol used by a reliable connection established between the first switch device and the controller device; adding path information of the second switch device to the first control message, to obtain an updated first control message; and forwarding, to the controller device, the updated first control message, to allow the controller device, after receiving a finally updated first control message comprising the updated first control message, to determine a routing path between the controller device and the first switch device according to path information added by each switch device to the finally updated first control message, and deliver an exact flow entry to the first switch device according to the routing path.