A method, controller, switch and system for determining path failure

Abstract

The invention discloses a method for determining path faults, a controller, a switch and a system. The controller instructs the switch to report the path where it is located after receiving a fault tracking message by presetting the flow entries of each switch included in the path to be detected. path label, the controller compares the received switch information corresponding to the path label with the predetermined switch information contained in the path to be detected corresponding to the path label, and determines whether the path to be detected is faulty according to the comparison result , where the controller only needs to send a fault tracking message to the initial switch on the path to be detected to complete the detection of at least one path, which improves the efficiency of path detection; and the switch only needs to be controlled by the controller during the whole process The functions of the data layer such as message forwarding and information reporting are completed, which is in line with the separation of the control plane and the forwarding plane in SDN.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for determining path failure, a controller, a switch and a system. Background technique [0002] Software Defined Network (English: Software Defined Network, referred to as: SDN) has set off a revolution in the network field. With the concept of separation of control and forwarding, it shrinks the control layer to the controller, which is convenient for global monitoring and management of data center network equipment. With the continuous research, discussion and maturity of various key technologies of SDN, SDN is gradually being used by operators / cloud service providers as the preferred solution for managing data center networks. [0003] The OpenFlow protocol is a network communication protocol for the controller in the SDN to control the devices on the forwarding plane, which realizes the separation of the data layer and the control layer. The OpenFlow network...

AI Technical Summary

Problems solved by technology

[0010] Embodiments of the present invention provide a method, controller, switch and system for determining path faults, so as to solve the problem that tracking efficiency decreases as the number of switches on the forwarding path increases, and the LSP path tracking scheme of MPLS does not conform to the control plane of SDN Problems with the separation feature of the forwarding plane

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