Testing system and method for high-speed Ethernet of large aircraft

Abstract

The invention discloses a test system and method for a high-speed Ethernet of a large aircraft, belongs to the technical field of aerospace, and is used for monitoring and testing the Ethernet in the large aircraft and obtaining and analyzing mirror image network data. Compared with a general Ethernet test system, the test system has the advantages that the load of a control computer is lower, and the efficiency is higher. According to the test system, the gigabit splitter is designed, and before data enter the control computer, SNMP protocol data are filtered out through the splitter, so that the front-end computer does not need to carry out filtering operation any more and can directly analyze and process the SNMP protocol data, the working efficiency of the control computer is improved, and the load is reduced.

Description

Technical Field

[0001] The present application relates to a testing system and method for high-speed Ethernet in large aircraft, belonging to the field of aerospace technology, and used for monitoring and testing Ethernet in large aircraft, and acquiring and analyzing mirror network data. Background Art

[0002] Conventional aircraft are generally small in size and contain less information data. Usually, a comprehensive electronic computer can collect all the data information flow of the entire aircraft through interfaces such as PCM code stream, RS422, 1553B bus, LVDS, etc., without the need for supporting switches and related network equipment. Therefore, the corresponding ground-based comprehensive test system has not designed a test system and method for aircraft Ethernet. Large aircraft, such as space station models, contain subsystems and information data that far exceed the size of general aircraft. In order to facilitate the management of information flow, multiple switches and supporting network equipment will be set up in large aircraft for network (communication network, payload network, etc.) exchange.

[0003] In order to facilitate the monitoring and testing of the Ethernet network status in the aircraft, the ground integrated test system needs to design a new test system and test method for the aircraft high-speed Ethernet, realize the monitoring and testing of Ethernet (including communication network, load network, etc.), and complete the functions of passive data monitoring, active SNMP management, and data processing and storage. At the same time, the designed test system and method must take into account the convenience and versatility of the test. Summary of the invention

[0004] The technical problem solved by the present application is: to overcome the deficiencies of the prior art, to provide a test system and method for large aircraft high-speed Ethernet, to achieve passive testing and SNMP management and testing of large aircraft high-speed Ethernet.

[0005] The technical solution of the present application is: a test system for high-speed Ethernet of large aircraft, comprising:

[0006] The environment of the object under test, including several switches on the aircraft;

[0007] The network test equipment comprises a plurality of optical ports for communicating with the tested environment object and an electrical port for communicating with the back-end control equipment. On the one hand, the network test equipment processes the mirror port data obtained from the tested environment object, processes and displays the data in the form of network packets, filters out SNMP protocol data from the mirror data, processes the protocol data and can perform protocol analysis on the obtained SNMP protocol data to obtain statistical performance indicators and device status data, and displays and stores the device status data obtained by analyzing the SNMP protocol in real time. On the other hand, the network test equipment performs SNMP protocol management and configuration on the switch in the tested environment through the optical port connected to the tested environment.

[0008] Furthermore, the SNMP protocol configuration includes closing a certain port on the switch and limiting the speed of a certain port on the switch.

[0009] Furthermore, the SNMP protocol management includes acquiring information in the SNMP MIB information base of each network device through the connected optical port using the SNMP protocol, processing and counting the number of sent packets, the number of received packets, and the receiving time in the SNMP MIB base, and performing real-time display and storage.

[0010] Furthermore, the network testing device forwards or exports the network performance data analyzed by the SNMP protocol in real time.

[0011] Furthermore, it also includes a back-end control device, which is used to control the front-end device part and perform data query when the device part connected to the aircraft is placed at the front end.

[0012] Furthermore, the back-end control device receives device control commands from the master control console, controls the device front end according to the device control commands, and forwards the network performance parameters and device status parameters returned by the front-end device to the master control server.

[0013] Furthermore, the plurality of switches on the aircraft include one top-level switch for the communication network, two access switches and one top-level switch for the payload network.

[0014] Furthermore, the network packet includes a MAC address, an IP address, and a protocol content; and the performance indicators include a network packet loss rate, a throughput rate, and a delay.

[0015] A test method implemented by a test system for high-speed Ethernet of a large aircraft according to claim 1, comprising:

[0016] In the actual test environment, no data is injected into the Ethernet network between the tested object environment and the network test equipment. Only by capturing the data of the tested switch mirror port and filtering out the SNMP protocol for analysis, the packet loss rate, throughput and latency of the switch statistics are obtained; the data on the mirror port will be captured and stored;

[0017] In passive testing, the host that sends the SNMP protocol Get command to the switch under test is the back-end control computer; the network test equipment stores the mirror port data on the disk array in real time, analyzes and manages the mirror data locally or remotely; the mirror data includes all network data flows flowing out of the mirror port; remote management or viewers are installed on the front-end control computer, back-end control computer or other PCs on the network to implement queries;

[0018] The original SNMP protocol data will be stored on the back-end control computer and in the matching disk array at the same time; the back-end control device analyzes the device status information of the tested switch itself from the original SNMP protocol data and provides a human-computer interaction interface.

[0019] A test method implemented by a test system for high-speed Ethernet of large aircraft according to claim 1, using SNMP protocol to configure switches and network terminals on board, perform port management and other management functions required by users; the SNMP protocol test function includes: actively sending SNMP protocol Get instructions to the device under test, obtaining information in the SNMP MIB information base of the device, including the packet loss rate, throughput and latency that the device can provide.

[0020] The advantages of this application compared with the prior art are:

[0021] (1) Compared with a general aircraft integrated test system that does not involve Ethernet functions, the present invention adds a brand-new test system and method designed for large aircraft high-speed Ethernet for the first time.

[0022] (2) The test system of the present invention can process higher-speed data than the general Ethernet test system. According to actual measurements, the system can collect and store Ethernet data at a rate of more than 10 Gbps / s without packet loss, which is much higher than the data flow peak of the general Ethernet test system.

[0023] (3) Compared with the general Ethernet test system, the test system of the present invention has a lower load on the control computer and a higher efficiency. A gigabit splitter is designed in this test system. Before the data enters the control computer, the SNMP protocol data is filtered out through the splitter, so that the front-end computer does not need to perform filtering operations and can directly analyze and process the SNMP protocol data, thereby improving the working efficiency of the control computer and reducing the load.

[0024] (4) The test system of the present invention has the functions of diversified analysis and management collection. For the high-speed network test equipment in the system, a self-developed software is designed to obtain the captured network data through an open interface function. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the test system for high-speed Ethernet of large aircraft used in this application;

[0027] Figure 2 This is the external connection block diagram of the high-speed network test system of this application;

[0028] Figure 3 Schematic diagram of high-speed network monitoring for this application. DETAILED DESCRIPTION

[0029] In order to better understand the above technical scheme, the technical scheme of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0030] The following is a further detailed description of a test system and method for high-speed Ethernet of large aircraft provided in an embodiment of the present application in conjunction with the accompanying drawings of the specification. The specific implementation method may include:

[0031] The environment of the object under test, including several switches on the aircraft;

[0032] The network test equipment comprises a plurality of optical ports for communicating with the tested environment object and an electrical port for communicating with the back-end control equipment. On the one hand, the network test equipment processes the mirror port data obtained from the tested environment object, processes and displays the data in the form of network packets, filters out SNMP protocol data from the mirror data, processes the protocol data and can perform protocol analysis on the obtained SNMP protocol data to obtain statistical performance indicators and device status data, and displays and stores the device status data obtained by analyzing the SNMP protocol in real time. On the other hand, the network test equipment performs SNMP protocol management and configuration on the switch in the tested environment through the optical port connected to the tested environment.

[0033] A set of high-speed network test equipment is designed in the test system. The equipment is mainly used to test high-speed Ethernet, including passive test and SNMP management and test functions. A complete ground high-speed Ethernet test system is invented around the high-speed network test equipment. And for the two functions of passive test and SNMP management and test, a reasonable test method is invented and designed.

[0034] The test system includes a set of high-speed network test equipment and related supporting test equipment. The design of the high-speed network test equipment is as follows:

[0035] a. Passive monitoring mode

[0036] 1) The device has multiple (four for example) ports connected to the ports on multiple switches of the network under test, and these four ports obtain the data mirrored to these four ports by the switches of the network under test; considering that the aircraft payload network usually has a higher data volume, the four ports are 1 10 Gigabit optical port (reserved for the payload network) and 3 Gigabit optical ports;

[0037] 2) Process the acquired mirror port data and display it in the form of network packets, including MAC address, IP address, protocol content, etc.;

[0038] 3) It can filter out SNMP protocol data from the mirror data of the 4 ports, process the protocol data, and perform protocol analysis on the acquired SNMP protocol data to calculate performance indicators such as network packet loss rate, throughput rate, delay, and device status data;

[0039] 4) Display and store the device status data obtained by analyzing the SNMP protocol in real time.

[0040] b.SNMP management mode

[0041] 1) Perform SNMP protocol management on switches and network devices on the device through the ports connected to the device;

[0042] 2) The SNMP protocol can be configured on the device through the connected port, including shutting down a port on the switch, limiting the speed of a port on the switch, etc.;

[0043] 3) The SNMP protocol can be used to obtain information from the SNMP MIB information base of each network device through the connected port, and process and count the information such as the number of sent packets, the number of received packets, and the receiving time in the SNMP MIB base;

[0044] 4) Display and store the device status data obtained through the SNMP protocol in real time.

[0045] Based on high-speed network test equipment, a complete set of ground Ethernet test system is built, such as Figure 1 The equipment matching table in the system is shown in Table 1.

[0046] Table 1 List of system components

[0047]

[0048] This test system also has data forwarding and storage functions and long-distance operation.

[0049] c.Data forwarding and storage

[0050] 1) The device can forward the network performance data analyzed by SNMP protocol in real time;

[0051] 2) The device can locally store SNMP protocol data, as well as network performance data and device status data analyzed by the SNMP protocol; the device can locally store mirror data obtained from the switch; the device can store data obtained through the SNMP protocol in the SNMP management mode and the process data of protocol interaction;

[0052] 3) The device supports the export of stored data by burning it to a disc;

[0053] 4) Equipped with an external storage array, it supports 16TB of data recording and storage capacity in passive monitoring mode.

[0054] d. Support remote operation

[0055] 1) The test equipment supports remote operation mode. When the equipment part connected to the aircraft is placed at the front end, the back-end configuration control computer can complete the control of the front-end equipment part and data query;

[0056] 2) The back-end control computer can receive device control commands from the master control console and control the front-end part of the device according to the device control commands; the back-end control computer forwards the network performance parameters and device status parameters sent back by the front-end device to the master control server.

[0057] Aiming at the test of Ethernet, the present invention proposes two test methods, including passive test and SNMP management and test.

[0058] a. Passive test

[0059] The passive test function means that in the actual test environment, no data is injected into the Ethernet network. Only the data of the mirror port of the switch under test is captured, and the SNMP protocol is filtered out for analysis to obtain the packet loss rate, throughput, delay and other data of the switch statistics. The data on the mirror port will be completely captured and stored.

[0060] In passive testing, the host that sends the SNMP protocol Get command to the switch under test is the back-end control computer. The high-speed network test system performs two functions, namely, storage and analysis of mirror data and analysis and storage of SNMP protocol data.

[0061] The storage and analysis of mirror data is realized through high-speed network test equipment and self-developed software. High-speed network equipment stores mirror port data on disk arrays in real time, and self-developed software can be used to analyze and manage mirror data locally or remotely. Mirror data contains all network data flows flowing out of the mirror port. Remote management or viewers can be installed on the front-end control computer, back-end control computer or other PCs on the network to realize query and other functions.

[0062] The original SNMP protocol data will be stored on the back-end control computer and in the supporting disk array. The self-developed software on the back-end computer is responsible for analyzing the throughput, packet loss rate, latency and other device status information of the tested switch from the original SNMP protocol data, and providing a human-computer interaction interface.

[0063] b.SNMP management and testing

[0064] SNMP protocol management functions include using SNMP protocol to configure switches and network terminals on board, mainly port management and other management functions required by users. SNMP protocol test function refers to actively sending SNMP protocol Get instructions to the device under test to obtain information in the SNMP MIB information base of the device, including the packet loss rate, throughput and latency that the device can provide.

[0065] In the technical solution provided in the embodiment of the present application, the external connection block diagram of the entire high-speed network testing system is shown in Figure 0.

[0066] The high-speed network test equipment is connected to the switch in the cabin through the cabin door, as shown in 0.

[0067] The equipment is mainly divided into splitters that are directly connected to the cabin and network monitoring and analysis equipment that performs data analysis and storage. It is mainly used to capture the network exchange data in the switch on the monitoring cabin. Its main functions are as follows:

[0068] 1) It can be connected to the mirror ports of 4 switches on the cabin (1 top-level switch of the communication network, 2 access switches and 1 top-level switch of the payload network), including 3 Gigabit mirror ports and 1 10 Gigabit mirror port;

[0069] 2) Capture the switch network exchange data in 4 mirror ports in real time;

[0070] 3) Process the acquired mirror port data and display it in the form of network packets, including MAC address, IP address, protocol content, etc.;

[0071] 4) Store the network exchange data captured and monitored in real time;

[0072] 5) The stored network monitoring data can be queried, and different fields can be filtered to obtain different information, including but not limited to source IP, destination IP, source MAC, destination MAC, packaged protocol, etc.;

[0073] The splitter is mainly used to filter, split and forward the network data obtained on the cabin, and synthesize the data obtained from the 4-way monitoring port on the cabin into 2 channels and then forward it to the network monitoring and analysis equipment. The network monitoring and analysis equipment mainly completes the storage and analysis of the mirror data, stores the mirror port data on the disk array in real time, and can analyze and manage the mirror data locally or remotely through self-developed software. Different information can be obtained according to the filtering of different fields, including but not limited to source IP, destination IP, source MAC, destination MAC, packaged protocol, etc.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0075] The contents not described in detail in this application specification belong to the common knowledge of those skilled in the art.

Claims

1. A test system for high-speed Ethernet of large aircraft, characterized in that: include: The environment of the object under test, including several switches on the aircraft; The network test equipment comprises a plurality of optical ports for communicating with the tested environment object and an electrical port for communicating with the back-end control equipment. On the one hand, the network test equipment processes the mirror port data obtained from the tested environment object, processes and displays the data in the form of network packets, filters out SNMP protocol data from the mirror data, processes the protocol data and can perform protocol analysis on the obtained SNMP protocol data to obtain statistical performance indicators and device status data, and displays and stores the device status data obtained by analyzing the SNMP protocol in real time. On the other hand, the network test equipment performs SNMP protocol management and configuration on the switch in the tested environment through the optical port connected to the tested environment.

2. A test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: The SNMP protocol configuration includes closing a port on the switch and limiting the speed of a port on the switch.

3. A test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: The SNMP protocol management includes acquiring information in the SNMP MIB information base of each network device through the connected optical port using the SNMP protocol, processing and counting the number of sent packets, the number of received packets, and the receiving time in the SNMP MIB base, and performing real-time display and storage.

4. A test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: The network testing device forwards or exports the network performance data analyzed by the SNMP protocol in real time.

5. A test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: It also includes a back-end control device, which is used to control the front-end device part and perform data query when the device part connected to the aircraft is placed at the front end.

6. A test system for high-speed Ethernet of large aircraft according to claim 5, characterized in that: The back-end control device receives the device control command from the master control console, controls the device front end according to the device control command, and forwards the network performance parameters and device status parameters returned by the front-end device to the master control server.

7. A test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: The switches on the aircraft include one top-level switch for the communication network, two access switches and one top-level switch for the payload network.

8. A test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: The network packet includes MAC address, IP address, and protocol content; the performance indicators include network packet loss rate, throughput rate, and delay.

9. A test method implemented by a test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: include: In the actual test environment, no data is injected into the Ethernet network between the tested object environment and the network test equipment. Only by capturing the data of the tested switch mirror port and filtering out the SNMP protocol for analysis, the packet loss rate, throughput and latency of the switch statistics are obtained; the data on the mirror port will be captured and stored; In passive testing, the host that sends the SNMP protocol Get command to the switch under test is the back-end control computer; the network test equipment stores the mirror port data on the disk array in real time, analyzes and manages the mirror data locally or remotely; the mirror data includes all network data flows flowing out of the mirror port; remote management or viewers are installed on the front-end control computer, back-end control computer or other PCs on the network to implement queries; The original SNMP protocol data will be stored on the back-end control computer and in the matching disk array at the same time; the back-end control device analyzes the device status information of the tested switch itself from the original SNMP protocol data and provides a human-computer interaction interface.

10. A test method implemented by a test system for high-speed Ethernet of large aircraft according to claim 1, characterized in that: Use the SNMP protocol to configure switches and network terminals on board, perform port management and other management functions required by users; the SNMP protocol test functions include: actively sending SNMP protocol Get instructions to the device under test, obtaining information from the device's SNMP MIB information base, including the packet loss rate, throughput and latency that the device can provide.

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