Single optical fiber fault processing method for Ethernet antomatic protection system

Abstract

The method includes following steps: step S202, each node of Ethernet automatic protection system (EAPS) sends out health detection frame to detect link statute of each protected port; step S204, when link failure or link alarm message is received, main node or boundary node processes link failure, and changes sequence number of health detection frame and sending time. Through bidirectional sending failure alarming frame etc processes, the invention can prevent too long convergence time of EAPS caused by that nodes inside ring couldn't detect link failure quickly when failure of single optical fiber occurs as well as prevents misinterpretation of EAPS caused by that health detection frame passes through another optical fiber.

Description

technical field [0001] The invention relates to the field of data communication network protection, in particular to a single optical fiber fault processing method for an automatic protection system of an Ethernet ring network. Background technique [0002] With the development of IP network in the direction of carrying multiple services, NGN (Next generation network, next-generation communication network), IPTV (Internet protocol television, Internet TV) and other services have higher and higher requirements for network reliability and real-time performance. The traditional ring network protection STP (Spanning-tree protocol, Spanning Tree Protocol) technology of the inbound layer 2 network cannot meet the requirements of fast convergence and link switching. RFC3619 defines an Ethernet Automatic Protection Switching (EAPS, Ethernet Automatic ProtectionSwitching) method, which solves the problem of slow convergence of network faults when Ethernet devices are in a ring networ...

AI Technical Summary

Problems solved by technology

Fig. 1 is the schematic diagram that single optical fiber breaks down in the prior art, as shown in Fig. 1, when the optical fiber 1 in the two optical fibers between the port 1 of node S1 and the port 1 of S2 breaks down, the port of node S1 The RX module of 1 cannot receive the optical signal, and quickly detects that the link has failed, but the RX module of port 1 of node S2 can still receive the optical signal for a period of time, and cannot quickly detect the link failure, relying on node S2 The master node and border node that deal with link changes cannot handle the link failure in time, which will cause the Ethernet automatic protection system to take a long time to converge

[0006] In addition, when a single fiber fails, the health detection frame can still pass through another fiber, and the master node will mistakenly believe that the link has not failed because of receiving the health detection frame, resulting in a processing error

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