Failure detection method, system, and main node in Ethernet loop network

Abstract

The invention provides a method for detecting faults in an Ethernet Ring. The Ethernet Ring comprises a main node which forms an annular structure and one or a plurality of transmission nodes. The method includes the following processes: the main node sends a health detection message from a main port and an secondary port bi-directionally to detect the faults in a link; after detecting the faults exist in the link, the main port sends a protocol message bi-directionally to each transmission node from the main port and the secondary port and locates the faults according to the response of the transmission node. In addition, the invention also provides a system for detecting the faults in the Ethernet Ring and a main node thereof. The invention can avoid the generation of broadcast storm and realize the fault location.

Description

technical field [0001] The invention relates to the Ethernet ring network technology, in particular to a fault detection method, system and master node in the Ethernet ring network. Background technique [0002] In view of many advantages such as fast fault protection switching and strong fault self-healing ability, the Ethernet ring network technology has been favored by more and more operators in recent years. FIG. 1 shows a schematic diagram of the Ethernet ring network structure, including a master node (Master Node) and multiple transit nodes (Transit Node), which form a ring structure. Each node is connected to two ports on the Ethernet ring network, one of which is called the primary port (Primary Port), and the other is called the secondary port (Secondary Port). Under normal circumstances, in order to avoid loops, the master node only opens the primary port and blocks the secondary port to avoid the broadcast storm caused by the circular transmission of packets on ...

AI Technical Summary

Problems solved by technology

According to the existing polling mechanism, the primary port will open the secondary port at this time. However, since the link from the secondary port to the primary port is normal, a one-way loop will inevitably occur after the primary node opens the secondary port, thus forming a broadcast storm.

[0005] That is to say, the existing fault detection mechanism cannot detect unnotified faults such as single-pass, and is prone to bad consequences such as broadcast storms

In addition, since there is no fault notification message for a non-notified fault, the master node cannot determine the specific location of the fault based on the fault notification message. Therefore, even if the master node can detect a non-notified fault, how to locate the fault after detecting a non-notified fault is also a problem

If the fault location cannot be accurately performed, the fault will not be dealt with for a long time, resulting in the failure of the ring network to work normally for a long time

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