A method and system for filtering BFD protocol packets

Abstract

A method and system for filtering BFD protocol packets are disclosed, relating to the technical field of communication. The method comprises the following steps of: comparing the key value and contentof the BFD configuration sent to the local control layer with the BFD configuration saved locally; marking the BFD configuration sent to the control layer with the mark; saving the marking BFD configuration in the local binary tree; When the timer interrupts the response, traversing the binary tree which locally stores the BFD configuration, and based on the marking result of the BFD configuration, sending the BFD configuration stored in the binary tree and needing addition or deletion operation to the application layer, and then performing addition or deletion operation of the BFD configuration in the application layer according to the marking result of the BFD configuration. The invention realizes the filtering of the BFD message on the forwarding layer, avoids the repeated reading andwriting of the FPGA by the BFD addition or deletion operation of the same descriptor, and avoids the 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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