Quick protection switching method with business cards backing up each other

Abstract

The invention relates to a quick protection switching method with business cards backing up each other, comprising the steps of real-time fault detection, real-time communication among business cards, quick interrupt response and quick protection switching. When ports of the business cards are broken down, logic processing units of board cards generate interrupt signals and send the interrupt signals to a CPU (Central Processing Unit) for processing in order to guarantee the quick fault detection; and when the board cards of the business cards are broken down, board cards of an opposite terminal generate interrupt signals aiming at the broken board cards and send the interrupt signals to the CPU for processing in order to guarantee the response reception in a shorter time. The quick communication of the business cards is realized by the logic connection of hardware and the application of registers. Fault signals of the business cards are directly sent to the logic processing units; once switching conditions are satisfied, the logic processing units directly generate the interrupt signals and send the interrupt signals to the CPU; the business cards maintain a working state of each port in real time; and once the interrupt signals are received, the business cards judge sources of the interrupt signals to make real-time responses.

Description

technical field [0001] The invention relates to the field of network communication, more specifically, to a fast protection switching method in which service cards are mutually backed up. Background technique [0002] Existing switching protection methods mostly use protection switching between two ports inside a service card for equipment using SDH (Synchronous Digital Transmission Technology) or SONET (Synchronous Optical Network Technology) optical interfaces on the line side, but this method exists Certain flaws. [0003] There is also a technology of switching between boards, but the effect of fast switching cannot be achieved. Carrier-grade products require a good protection switching function, and require protection switching to be completed within 50 milliseconds, including functions such as fault detection, fast switching of services to normal equipment, and shielding of faulty lines. How to realize fast switching within 50 ms in the existing technology of switchi...

AI Technical Summary

Problems solved by technology

[0005] 1. It can only protect the defects on the port, such as the failure of the optical module, or the disconnection of the optical fiber connecting the port with other user equipment;

[0006] 2. Once a single board fails or is removed, the services of several ports are lost at the same time, which cannot be protected

[0007] 3. For the protection switching between service cards, it is difficult to realize the requirement of fast protection switching within 50 milliseconds

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