AFDX performance test method based on RFC2544

Abstract

The invention discloses an AFDX performance test method based on RFC2544. The method herein includes the following steps: 1. configuring the number of virtual links at respective ports of an AFDX network switch and parameters of the virtual links, such that the data trans-receiving rates of respective ports reach a line speed; 2. setting a source MAC address in an Ethernet test device; 3. configuring a transmitting port in the Ethernet test device, comprising configuring a port mode to be a 100M full-duplex trans-receiving mode and configuring a destination MAC address to be a cyclic growth mode; and 4. testing the performances of the AFDX switch by using the Ethernet test device. According to the invention, the method, by designing a reasonable network configuration parameter and setting the MAC address of the AFDX network, can use existing RFC2544 general test protocols to test performance indexes of the AFDX network switch, such as packet loss rate, back to back and delay.

Description

technical field [0001] The invention belongs to the field of avionics communication networks and relates to a method for testing the performance of an AFDX network switch. Background technique [0002] The aviation full-duplex switched Ethernet (AFDX) bus has been recognized by more and more aircraft manufacturers for its high reliability and transmission rate, and has become the basis for building a new generation of civil aircraft avionics systems. It provides an up to A star topology of 24 end systems to connect the internal network bridged from one switch to the other. AFDX uses virtual link (Virtual Link, VL) to reasonably and effectively allocate and isolate the bandwidth of data links on the network, and uses bandwidth allocation gap (Bandwidth Alllcation Gap, BAG) to control the sending of Ethernet data on the same virtual link The minimum time interval of frames increases the certainty of the network and effectively prevents the problems of network congestion and c...

AI Technical Summary

Problems solved by technology

[0004] For the testing of AFDX network switches, it is generally necessary to customize professional AFDX test equipment and manually write the test process. Discover potential design flaws in switches that affect the security of aircraft data networks and fail to make effective use of existing mature network test protocol specifications

In addition, the versatility of aviation bus test equipment is poor, and different bus test equipment are generally not compatible with each other, which greatly increases the cost of test equipment and causes waste of resources

[0005] Due to the characteristics of AFDX network traffic control, unreasonable network configuration will cause frame data to be filtered and controlled during the test process, affecting the correctness of test results

If the number of virtual links is sent too much, the network traffic will be too large, exceeding the line speed range, and the data frame will be filtered by the switch management function, resulting in unreal test data. If the number of virtual links is too small, the amount of sent data cannot reach the line speed. , the working condition of the switch under the maximum data traffic load cannot be measured

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