TWI718623B - Network transmission detection system - Google Patents

Abstract

The present invention is a network transmission detection system. A network device to be tested is provided with a first port to be tested and a second port to be tested, and a test device enables the ports to be tested to mutually transmit packets. The feature of the present invention is that: The first port under test has a first VLAN ID, a second VLAN ID, and a first port-based VLAN ID, and the second port under test has the first VLAN ID, the second VLAN ID, and a second port-based VLAN ID, and the first port-based VLAN ID is the same as the first VLAN ID, and the second port-based VLAN ID is the same as the second VLAN ID. There is also an L2 table stored in the network device under test, and the The L2 table will record a first entry and a second entry, the first entry includes a first address corresponding to the first VLAN ID of the first port under test, and the second entry includes a second address corresponding to In the second VLAN ID of the second port under test, when the waiting port sends out packets, the network device under test will return each packet to the corresponding waiting port according to the corresponding entry in the L2 table. Test port.

Description

Network transmission detection system

The present invention relates to a network transmission detection system, in particular to a network transmission detection system with an L2 form, which can use small packets as test packets, and can also achieve full line load.

Generally speaking, before network communication devices (such as routers, network switches, network servers... etc.) are launched on the market, the industry must first perform functional tests on these network communication devices to Ensure that these network communication devices have good transmission performance. However, if the industry finds that these network communication devices have passed the test before the line is not fully loaded, the user will conduct a self-test on each network communication device. However, the problem of failure to meet the test standards may be found. Based on this, the inventor believes that if the network communication devices start to test the network transmission rate after the line is fully loaded, the test results will definitely be improved. Good precision.

In conclusion, the current testing methods of network transmission rate can be roughly divided into Loopback Test, Saturation Test, Snake Test and External Test. Here is a brief description:( 1) Loopback Test: It enables a network communication device to send packets of a specific format to itself to verify the content of the packet. However, due to the central processing unit (CPU) of the network communication device, one of the On the one hand, a packet must be generated, and on the other hand, the packet must be Verification, it will cause the packet transmission rate to be slow; (2) Saturation Test: It puts all the ports of the network communication device in the same Virtual Local Area Network (Virtual Local Area Network, After that, the network communication device will send packets of different sizes to its own communication port in a broadcast mode, and the first inspection of these packets will not be carried out until the network communication device reaches full capacity. And after waiting for a predetermined detection period, check again whether the wrong packet is received during the predetermined detection period. In this way, the network communication device can better detect errors and problems that occur under high-speed transmission. However, due to the network There are packets of various sizes in the system, which makes it more difficult to accurately check the correct network transmission rate; (3) Snake Test: It is to connect all the communication ports of the network communication device in series. , So that the packet can be sent from the first communication port to the last communication port. However, because the central processing unit (CPU) of the network communication device also needs to generate the packet on the one hand, and verify the packet on the other hand, it is often Unable to generate enough packets to reach full line load; (4) External Test: It uses an external test machine to send and receive packets under the same network environment as the aforementioned snake test. , Although it can make the network communication device reach the full line and verify the function of the virtual local area network, but because the cost of the external test machine is very high, and there are follow-up regular repairs and maintenance costs, it does not meet Actual benefits.

In view of this, the applicant has used a new network speed test method. The network speed test method is to set two ports to the same VLAN and use the VLAN mechanism to broadcast fixed-length packets ( Broadcast) method to send, receive and forward in the network communication device until the network communication device is fully loaded, and then use the number of packets sent and received The fixed length of the packet is used to calculate the overall transmission speed, so as to solve the shortcomings of the aforementioned conventional test methods. However, after the subsequent actual use, the applicant found that due to the memory management unit (MMU) inside the new SoC (System on a Chip), the limited resource allocation method will cause unknown packets when transmitting packets. (Unknown Unicast), Multicast (Multicast) and Broadcast (Broadcast) have usage rate restrictions. In this case, the packet will be less than a certain length, that is, when the network communication device uses small packets to forward, After the applicant uses the aforementioned network speed test method, the network transmission speed of the network communication device will not reach the standard, so that the network communication device cannot use small packets to achieve full transmission for the network speed test.

In summary, how to effectively solve the aforementioned problems so that the network communication device can successfully complete the network speed test method in the form of small packets has become an important problem to be solved by the present invention.

In view of the fact that when the conventional test method is applied to a new SoC, it is impossible to use small packets to achieve the effect of full load transmission. Therefore, the inventor has finally designed the present invention based on years of practical experience and after many experiments and tests. A network transmission detection system is expected to be able to effectively improve many of the aforementioned shortcomings by means of the present invention.

An object of the present invention is to provide a network transmission detection system, including a network device to be tested and a test device, wherein the network device to be tested is provided with at least one port group to be tested, and the port group to be tested includes a A first port to be tested and a second port to be tested, and the first port to be tested and the second port to be tested can be connected to each other through a loopback fixture, and the test device is connected to the network device under test, It enables the port to be tested to transmit packets to each other. The feature of the present invention is that the first port to be tested has a first virtual area network identification code, a second virtual area network identification code and a first port Port basic virtual area network identification code, and the first port basic virtual area network identification code is the same as the second virtual area network identification code, and the second port under test has the first virtual area network identification code Code, the second virtual local area network identification code, and a second port basic virtual local area network identification code, and the second port basic virtual local area network identification code is the same as the first virtual local area network identification code, The network device under test stores an L2 table, where the L2 table records a first entry and a second entry, and the first entry includes at least a first address corresponding to the first port under test The content of the first virtual area network identification code, the second entry includes at least a second address corresponding to the content of the second virtual area network identification code of the second port to be tested, in the first waiting port When the test port sends a packet to the second port under test, and the target address of the packet is the first address, the network device under test will pass the packet through the first entry in the L2 table. The internal part of the network device under test is sent back to the first port under test; when the second port under test sends a packet to the first port under test, and the target address of the packet is the second address, the According to the second entry of the L2 table, the network device under test will return the aforementioned packet to the second port under test through the inside of the network device under test. The transmitted packets are all known target locations, and unicast technology is used. Therefore, although the network device under test uses small packets, the effect of full line load can also be achieved.

Another object of the present invention is to provide a network transmission detection system, including a network device to be tested and a test device, wherein the network device to be tested is provided with at least one port group to be tested, and the port group to be tested includes A first port to be tested and a second port to be tested, and the first port to be tested can be connected to itself through a loopback fixture, and the second port to be tested can be connected to itself through another loopback fixture , The test device is connected to the network device under test, and enables each port to be tested to send a packet to be sent back to itself. The feature of the present invention is that the first port to be tested has a first virtual area network Identification code, a second virtual local area network identification code and a first port basic virtual local area network identification code, and the first port basic virtual local area network identification code is the same as the second virtual local area network identification code , The second port to be tested has the first virtual local area network identification code, the second virtual local area network identification code, and a second port basic virtual local area network identification code, and the second port basic virtual The local area network identification code is the same as the first virtual local area network identification code. An L2 table is stored in the network device under test. The L2 table records a first entry and a second entry. An entry includes at least the content of a first address corresponding to the second virtual area network identification code of the second port under test, and the second entry includes at least the content of the first address corresponding to the first port under test The content of the first virtual local area network identification code, when the first port under test sends a packet back to itself, and the destination address of the packet is the first address, the network device under test will follow the L2 The first entry of the table sends the aforementioned packet to the second port under test through the inside of the network device under test. After receiving the aforementioned packet, the second port under test will send the aforementioned packet back to itself again. The network device under test will send the aforementioned packet to the first port under test through the inside of the network device under test according to the second entry of the L2 table. In this way, the network transmission detection system can also use Small packets are used as test packets and can achieve the effect of full line load.

In order to facilitate your reviewer to have a further understanding and understanding of the purpose, technical features and effects of the present invention, the examples and diagrams are described in detail as follows:

[Learning]

no

〔this invention〕

1‧‧‧Network transmission detection system

11‧‧‧Network device under test

11A‧‧‧Port group to be tested

110‧‧‧L2 Form

111‧‧‧The first port to be tested

112‧‧‧Second port to be tested

13‧‧‧Test device

15, 25, 26‧‧‧Return fixture

Figure 1 is a schematic diagram of the network transmission detection system of the present invention; Figure 2 is a schematic diagram of the network device under test of the first embodiment of the present invention; Figure 3 is a schematic diagram of the transmission path of the first embodiment of the present invention ； Fig. 4 is a schematic diagram of the network device under test according to the second embodiment of the present invention; and Fig. 5 is a schematic diagram of the transmission path of the second embodiment of the present invention.

The present invention is a network transmission detection system, which is suitable for testing the network transmission rate with small packets. Please refer to Figures 1 and 2. In the first embodiment, the network transmission detection system 1 Including at least one network device under test 11 (such as router, network switch, network server, etc.) and a test device 13, wherein the network device under test 11 has at least one port group under test 11A, the port group under test 11A includes a first port under test 111 and a second port under test 112, and both the first port under test 111 and the second port under test 112 can be connected to a fixture 15 (loopback cables) are connected to each other, so that the first port under test 111 and the second port under test 112 can transmit packets to each other.

Continuing, please refer to Figures 1 and 2. In the first embodiment, the testing device 13 can be a computer or other electronic device, which can be electrically connected to the network device under test 11, and The test device 13 sends a control message to enable the first port 111 to be tested to send a packet, and to send it to the second port 112 to be tested through the loopback fixture 15, and to make the second port 112 to be tested send a packet, And send to the first port 111 to be tested through the loopback fixture 15, wherein the packets sent by the first port 111 and the second port 112 to be tested can have the same fixed length, and the length of the packet can be It is equal to or less than 295 bytes, but not limited to this, because although the network transmission detection system 1 of the present invention can be applied to small packets, it can also be applied to large packets (that is, more than 295 bytes), Therefore, the network transmission detection system 1 has better applicability and can test more network communication devices.

Please refer to Figures 1 to 3. In the first embodiment, the first port 111 to be tested will belong to two virtual local area networks (Virtual Local Area Network, VLAN for short) and one port. Port-based VLAN (port-based VLAN), wherein the first port 111 to be tested has a first virtual local area network identification code (VLAN ID), a second virtual local area network identification code, and a first Port-based VLAN ID (port-based VLAN ID), and the first port-based VLAN ID is the same as the second virtual LAN ID, with the virtual LAN as M1 Take M2 as an example. The first virtual local area network identification code can correspond to M1, the second virtual local area network identification code can correspond to M2, and the basic virtual local area network identification code of the first port can correspond to M2; The two ports under test 112 will also belong to two virtual local area networks and one port-based virtual local area network. Among them, the second port under test 112 has the first virtual local area network identification code and the second virtual local area network. The road identification code is the same as the basic virtual area network identification code of a second port, and the basic virtual area network identification code of the second port will be the same as the first virtual area network identification code. Therefore, the basic virtual area network identification code of the second port The virtual local area network identification code can correspond to M1.

In addition, please refer to FIGS. 1 to 3 again. In the first embodiment, the network device under test 11 stores an L2 table 110 (L2 Table), wherein the L2 table 110 records a first Entry and a second entry, the first entry includes at least a first address (such as Y address) corresponding to the first virtual area network identification code of the first port 111 to be tested (such as: The content of M1), for example, the first entry can be recorded as "Y@111, M1"; the second entry includes at least a second address (such as X address) corresponding to the second port 112 under test The content of the second virtual local area network identification code (such as M2), for example, the second entry can be recorded as "X@112, M2"; and, when the target location generated by the first port 111 to be tested is the first After a packet with an address (such as Y address) is transmitted to the second port 112 to be tested (as the dotted arrow in Figure 3), the second port of the second port 112 to be tested is based on virtual local area network identification Code, which corresponds to M1 with the first virtual area network identification code of the first port 111 under test. Therefore, the forwarding destination of the packet is the first virtual area network identification code of the first port 111 under test (such as: M1). Therefore, after the second port 112 under test receives the aforementioned packet, the network device under test 11 will first search for the forwarding target from the L2 table 110, and the search condition is "the target location is the first address (e.g., Y Address) "and" the first virtual local area network identification code of the first port 111 to be tested (e.g. M1)", then the network device under test 11 will be based on the first entry of the L2 table 110 (e.g. : Y@111, M1), the aforementioned packet is transmitted back to the first port 111 to be tested via the inside of the network device under test 11 (as shown by the dotted arrow in Figure 3). In the same way, when the second port 112 under test sends a packet to the first port 111 under test, and the target address of the packet is the second address (such as X address), the network device under test 11 will follow The second entry of the L2 table 110 (such as X@112, M2) returns the aforementioned packet to the second port 112 under test through the inside of the network device 11 under test.

In summary, please refer to Figures 1 to 3. In the network transmission detection system 1, the packets generated by the port group 11A under test are all packets belonging to a known target location. After a predetermined time of forwarding packets, the number of packets sent from the first port under test 111 to the second port under test 112 is sufficient to make the line fully loaded. Similarly, the number of packets sent from the second port under test 112 to the first port under test The number of packets of 111 is also enough to make the line reach full load. In this way, because the network transmission detection system 1 of the present invention uses unicast to transmit packets, and the content of the L2 table 110 is specially designed to prevent unknown packets from being transmitted in the network transmission detection system 1, Therefore, it can be applied to the new SoC, and can meet the purpose of using small packets as test packets.

Furthermore, in the first embodiment, the first port to be tested 111 and the second port to be tested 112 are connected by a tie-back fixture 15, but it is not limited to this. In the second embodiment of the present invention , For the convenience of explanation, only the changed components will be re-labeled later, and the other components will still maintain the original label, so we will explain it first. Please refer to Figures 1 and 4, the first port 111 to be tested can be connected to itself through a loopback fixture 25, and the second port 112 to be tested can be connected to itself through another loopback fixture 26. In addition, the record content of the L2 table 110 will also be adjusted accordingly, wherein the first entry includes at least a first address (such as: Y address) corresponding to the second virtual area network identification of the second port 112 under test The content of the code (such as M2), for example, the first entry can be recorded as "Y@112, M2"; the second entry includes at least the first address (such as the Y address) corresponding to the first waiting The content of the first virtual local area network identification code (such as M1) of the test port 111, for example, the second entry can be recorded as "Y@111, M1".

Please refer to Figures 4 and 5 again. When the first port 111 to be tested generates a packet whose target location is the first address (e.g. Y address) and sends it back to itself via the return fixture 25 (e.g. The dotted arrow in Figure 5), since the basic virtual area network identification code of the first port of the first port under test 111 corresponds to the second virtual area network identification code of the second port under test 112 M2, therefore, the forwarding destination of the packet is the second virtual local area network identification code of the second port 112 under test (such as M2). Therefore, after the first port 111 under test receives the aforementioned packet, the network under test The road device 11 will first search for the forwarding destination from the L2 table 110. The search conditions are "the destination location is the first address (e.g. Y address)" and "the second virtual local area network identification code of the second port 112 to be tested (e.g. : M2)", after that, the network device under test 11 will transmit the aforementioned packet through the network device under test 11 according to the first entry of the L2 table 110 (eg: Y@112, M2) To the second port 112 to be tested (as the dashed arrow in Figure 5). Moreover, when the second port 112 under test receives the aforementioned packet, it will send the packet again, and then send it back to itself via another return fixture 26, due to the basis of the second port of the second port 112 under test The virtual local area network identification code, which corresponds to the first virtual local area network identification code of the first port 111 under test, corresponds to M1. Therefore, the forwarding destination of the packet is the first virtual local area network of the first port 111 under test. Identification code (e.g. M1), therefore, the network device under test 11 will first search for the forwarding target from the L2 table 110, and the search conditions are "the target location is the first address (e.g. Y address)" and "the first waiting The first virtual local area network identification code of the test port 111 (such as: M1)", so that the network device under test 11 can compare the previous one according to the second entry of the L2 table 110 The packet is transmitted to the first port 111 under test through the inside of the network device 11 under test. In this way, after the packet is forwarded for a predetermined period of time, the effect of full line load can be achieved.

In particular, through the method of the second embodiment, when the first address is equal to the second address, no matter if the operator uses the loopback fixture 15 method of the first embodiment (that is, two to-be-tested) Ports are connected to each other), or the loopback fixtures 25 and 26 of the second embodiment (that is, the two ports to be tested are individually loopbacked), both of which can use the same L2 table 110 record content for this The network device 11 to be tested can search for corresponding items according to requirements, which can also effectively improve the convenience of the network transmission detection system 1 of the present invention, and reduce the error setting of the target location, the port to be tested and the local network by the staff. Opportunity to identify the code.

According to, the above are only the preferred embodiments of the present invention. However, the scope of rights claimed by the present invention is not limited to this. Anyone familiar with the art can use the technical content disclosed in the present invention. The equivalent changes that are easily considered should all fall within the scope of protection of the present invention.

1‧‧‧Network transmission detection system

11‧‧‧Network device under test

110‧‧‧L2 Form

13‧‧‧Test device

Claims (5)

A network transmission detection system includes: at least one network device to be tested, at least one port group to be tested, the port group to be tested includes a first port to be tested and a second port to be tested, and the first to be tested The test port and the second port to be tested can be connected to each other through a loopback fixture; and a test device is connected to the network device to be tested, which enables the first port to be tested to send a packet, and the packet The length of is equal to or less than 295 bytes, and is sent to the second port under test through the loopback fixture, and can make the second port under test send out packets, and send packets to the second port through the loopback fixture A port to be tested; the first port to be tested has a first virtual local area network identification code, a second virtual local area network identification code, and a first port basic virtual local area network identification code, and the first port The basic virtual area network identification code of the port is the same as the second virtual area network identification code, and the second port to be tested has the first virtual area network identification code, the second virtual area network identification code, and a second virtual area network identification code. Two-port basic virtual local area network identification code, and the second port basic virtual local area network identification code is the same as the first virtual local area network identification code, and an L2 table is stored in the network device under test, in which, The L2 table will record a first entry and a second entry. The first entry includes at least a first address corresponding to the content of the first virtual area network identification code of the first port under test, the The second entry includes at least a second address corresponding to the content of the second virtual local area network identification code of the second port under test, a packet is sent from the first port under test to the second port under test, and the packet When the target address of is the first address, the network device under test will return the aforementioned packet to the first network device under test according to the first entry in the L2 table. Test port; when the second port under test sends a packet to the first port under test, and the target address of the packet is the second address, the network device under test will follow the second address of the L2 table Entry, the aforementioned packet is sent back through the network device under test To the second port to be tested. The network transmission detection system according to claim 1, wherein the first address is equal to the second address. The network transmission detection system according to claim 1 or 2, wherein the length of each packet is the same as each other. A network transmission detection system includes: at least one network device to be tested, at least one port group to be tested, the port group to be tested includes a first port to be tested and a second port to be tested, and the first to be tested The test port can be connected to itself through a loopback fixture, and the second port to be tested can be connected to itself through another loopback fixture; and a test device is connected to the network device under test, which can Make the first port to be tested send a packet, and the length of the packet will be equal to or less than 295 bytes, and send it back to the first port to be tested through the loopback fixture, and enable the second port to be tested Send a packet and send it back to the second port under test through the other return fixture; the first port under test has a first virtual local area network identification code, a second virtual local area network identification code, and a The first port's basic virtual area network identification code, and the first port's basic virtual area network identification code is the same as the second virtual area network identification code, and the second port to be tested has the first virtual area Network identification code, the second virtual local area network identification code, and a second port basic virtual local area network identification code, and the second port basic virtual local area network identification code is the same as the first virtual local area network Identification code, an L2 table is stored in the network device under test, wherein the L2 table records a first entry and a second entry, and the first entry includes at least a first address corresponding to the second The content of the second virtual area network identification code of the port to be tested, the second entry includes at least the content of the first address corresponding to the first virtual area network identification code of the first port to be tested, in the When the first port to be tested sends a packet back to itself, and the destination address of the packet is the first address, the network device to be tested The configuration will send the aforementioned packet to the second port under test through the inside of the network device under test according to the first entry of the L2 table. After receiving the aforementioned packet, the second port under test will send the aforementioned packet again The packet is sent back to itself, and the network device under test will send the aforementioned packet to the first port under test through the inside of the network device under test according to the second entry of the L2 table. The network transmission detection system according to claim 5, wherein the length of each packet is the same as each other.

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