A method and system for filtering BFD protocol packets

Abstract

The invention discloses a BFD protocol message filtering method and system, which relate to the field of communication technology. The method includes comparing the key value and content between the BFD configuration sent from the control layer to the local and the BFD configuration saved locally. Mark the BFD configuration delivered by the control layer, and save the marked BFD configuration to the local binary tree; when the timer interrupts the response, traverse the local binary tree that saves the BFD configuration, and based on the marking result of the BFD configuration, Send the BFD configuration saved in the binary tree that needs to be added or deleted to the application layer, and then add or delete the BFD configuration in the application layer according to the marking result of the BFD configuration. The present invention realizes the filtering of BFD messages on the forwarding layer, avoids repeated reading and writing of FPGA by BFD addition and deletion operations of the same descriptor, and avoids configuration redundancy on the FPGA.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a BFD protocol message filtering method and system. Background technique [0002] In order to reduce the impact of equipment failures on services and improve network reliability, when network failures occur, network equipment needs to be able to detect communication failures with its adjacent equipment as soon as possible, so that measures can be taken in time to ensure the continuation of services. In the existing network, for the detection of network faults, some links usually use hardware detection signals, such as using SDH (Synchronous Digital Hierarchy, Synchronous Digital Hierarchy) alarms to detect link faults, but not all All media can provide hardware detection. Some applications rely on the upper-layer protocol’s own Hello message mechanism for fault detection, but the detection time of the upper-layer protocol is more than 1 second, which is too long for some ap...

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Problems solved by technology

[0003] When performing BFD oscillation or routing oscillation tests, the control layer will repeatedly add and delete the BFD configuration of the same descriptor. Array) to configure the registers of multiple modules inside. In some cases, due to the long time for the CPU to access peripherals, it takes a long time for a BFD entry to be fully configured on the FPGA. For BFD entries with the same descriptor, if The previous configuration has not been processed yet. At this time, the reentry of the latter configuration will cause the configuration residue of the previous BFD entry in the FPGA. The BFD addition and deletion operations of the same descriptor read and write to the FPGA repeatedly, making the FPGA configuration redundant.

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