Controller network loop detection method and device, and controller

Abstract

The invention discloses a controller network loop detection method and device, and a controller, wherein the method comprises the steps that: the controller sends a detection message having predetermined characteristics to a switch, so that the switch broadcasts the detection message at the access port of extraterritorial equipment; when receiving a message from the switch, the controller judges whether the message has the predetermined characteristics or not; and, when the message has the predetermined characteristics, the controller determines that the extraterritorial network of the controller has a loop. According to the controller network loop detection method and device, and the controller disclosed by the invention, a loop detection mechanism is arranged at the controller side; thedetection message having the predetermined characteristics is sent to the switch, so that the switch broadcasts the detection message; if the controller receives the message from the switch and the message also has the predetermined characteristics, the fact that the extraterritorial network of the controller has the loop is determined; therefore, where the loop occurs can be determined accordingto the related information of the received message; the detection result is accurate; and the problem in the prior art can be solved.

Description

technical field [0001] The invention relates to the communication field, in particular to a detection method, device and controller for a controller network loop. Background technique [0002] In traditional networks (IP / Ethernet), network connection or configuration errors are likely to cause forwarding loops in the network, causing devices to repeatedly send broadcast, multicast, and unknown unicast packets, resulting in waste of network resources and even lead to network paralysis. [0003] Such as figure 1 As shown, it is a schematic diagram of a SDN (Software Defined Network or Controller Network, SoftwareDefined Network) network for control / forward separation. Under the SDN solution for control / forward separation, there are the following problems: 1. If the network outside the controller domain (for example, a gateway If the access (Access) port on the device loops, a broadcast storm will occur and the network will be paralyzed, posing a great threat to the network d...

AI Technical Summary

Problems solved by technology

[0002] In traditional networks (IP / Ethernet), network connection or configuration errors are likely to cause forwarding loops in the network, causing devices to repeatedly send broadcast, multicast, and unknown unicast packets, resulting in waste of network resources and even lead to network paralysis

[0003] like figure 1 As shown, it is a schematic diagram of a SDN (Software Defined Network or Controller Network, SoftwareDefined Network) network for control / forward separation. Under the SDN solution for control / forward separation, there are the following problems: 1. If the network outside the controller domain (for example, a gateway If a loop occurs on the access (Access) port on the device, a broadcast storm will occur and the network will be paralyzed, posing a great threat to the network device

2. If it is sent to the controller, it will also pose a threat to the performance and security of the control plane. For example, frequent migration of hosts in a loop scenario will be sent to the controller

[0004] In short, under the SDN scheme where control and forwarding are completely separated, there is no way to find out whether there is a loop in the network outside the controller domain. Once a loop occurs, the broadcast storm will cause the network to be paralyzed

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