Method of determining path fault, controller, switches and system

Abstract

The invention discloses a method of determining a path fault, a controller, switches and a system. Through presetting a flow entry on each switch on a to-be-detected path, the controller indicates the switch to report the label of the path where the switch is after a fault trace message is received; the controller compares the information of the switch corresponding to the received path label with predetermined information of each switch in the to-be-detected path corresponding to the path label, whether a fault appears in the to-be-detected path is determined according to a comparison result; and the controller only needs to issue one fault tracking message to an initial switch in the to-be-detected path, detection on at least one path can be completed, and the path detection efficiency can be improved. During the whole process, the switch completes data layer functions such as message forwarding and information reporting only under control of the controller, which is in line with features of separation between a control panel and a forwarding plane in a SDN (Software Defined Network).

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...

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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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