Method, PE equipment and system for linear protection switching

Abstract

The present invention provides a linear protection switching method, PE equipment and system, including: when the near-end network side edge PE equipment receives the local non-fault input, obtains its own first state and first switching decision and The first state of the remote PE device is sent to the remote PE device; the remote PE device obtains its own second state and second switching decision after receiving the first state of the local PE device, and sends the obtained second state of itself to the near-end PE device; the remote PE device determines whether to switch the link according to the acquired and second switching decisions; the near-end PE device obtains its own third state after receiving the second state of the remote PE device and a third handover decision; the near-end PE device determines whether to perform link handover according to the obtained first handover decision and the third handover decision. The technical solution of the invention enhances the controllability of the network, effectively avoids the problem of timeliness and the problem of service interruption of up to 5s in the process of operating the network.

Description

technical field [0001] The present invention relates to network communication technology, in particular to a linear protection switching method, network side edge (PE, Provider Edge) equipment and system. Background technique [0002] The carrier-level reliability requirements of the communication system include high network reliability requirements, and the services carried by the telecom network must meet the 50ms network failure recovery performance requirement. In order to achieve the service self-healing performance required by the carrier level on the Packet Transport Network (PTN) equipment, ITU-T and other related standard organizations have proposed the G.8031 linear protection switching standard for the Ethernet service. Linear protection switching is a protection mechanism that allocates corresponding protection resources for working resources. It implements network resource switching in a predictable manner, which facilitates network planning, deployment, and man...

AI Technical Summary

Problems solved by technology

The above method needs to use the state carried by the most recently received APS message stored in the memory to mark the remote state. Usually, the APS protocol sent by the remote device to the near-end device is usually sent at an interval of 5s; that is, The longest update interval of the far-end status recorded by the near-end device is 5s; using the existing technology, in the scenario where the remote APS protocol can be received before, but the remote APS protocol cannot be received later, all operations of the near-end All are affected by the previous state of the remote end recorded in the memory. After the near end obtains the temporary state, it must be compared with the recorded remote state before unnecessary; the APS protocol loss reporting alarm time limit is 3.5 times the APS message sent Period (5s), that is, the validity of the far-end state stored in the near-end memory is 17.5s, that is to say, within 17.5s, all operations at the near-end need to be compared with the far-end state recorded in the memory; Technical implementation method, if there is a backup link failure, if the remote state received by the near-end is the highest priority lockout (Lockout of protection, LO) state, the near-end device cannot respond to any input within 17.5s, affecting Controllable and manageable features of equipment

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