Method and device for looped network protection

Abstract

The invention provides a method and a device for looped network protection. The method is applied in a main node of a looped network and is used for protecting the service transmission between the looped network and a central network; the looped network also comprises a second main node and a plurality of transmission nodes; the method comprises the following steps: A, the main node transmits a detection message from a main port of the main node to a secondary port of a second main node; B, a first main node receives the detection message transmitted by the second main node from the secondary port of the first main node; C, when the first main node does not receive the detection message transmitted by the second main bode within preset time, the secondary port is changed from the blocked state to the opened state by the first main node, and an address fresh message is transmitted to the loop from the secondary port. With the adoption of the method and the device, the problem that the service flow may be interrupted because of faults at a looped network is avoided effectively.

Description

technical field [0001] The invention relates to ring network protection, in particular to a method and device for protecting service flow on the ring network. Background technique [0002] On the expressway, due to the needs of traffic management, monitoring equipment may need to be deployed in different locations. In the prior art, multiple video monitoring devices (such as encoders) are connected in a ring networking manner. like figure 1 As shown, first of all, all video surveillance data packets (also called service packets) are forwarded from node A to the monitoring center network for storage or viewing by users, which causes node A to handle a large number of packet forwarding tasks, which is easy become a point of failure; in fact, the closer to node A, the greater the flow of data packets. This mechanism does not use fiber optic link resources in a reasonable and balanced manner. In some places, the flow is too large, and in some places, the flow may be small. The...

AI Technical Summary

Problems solved by technology

However, the distance of the expressway is very long, which may reach hundreds or even thousands of kilometers. If many video surveillance encoding devices are connected to the monitoring center network through optical fibers, a lot of optical fiber resources will be wasted, and the cost of networking is very high. Some optimization, but user acceptance is still low

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