Network transmission detection system

Abstract

The present invention discloses a network transmission detection system, wherein a to-be-detected network device is provided with a first to-be-detected port and a second to-be-detected port, whereina test device can enable the to-be-detected ports to transmit packets mutually; the first to-be-detected port is provided with a first VLAN ID, a second VLAN ID and a first port-based VLAN ID, and thesecond to-be-detected port is provided with the first VLAN ID, the second VLAN ID and a secondport-based VLAN ID; wherein the first port-based VLAN ID is the same as the first VLAN ID, the second port-based VLAN ID is the same as the second VLAN ID; an L2 table is further stored in the to-be-tested network device, wherein the L2 table records a first entry and a second entry, the first entry comprises a first VLAN ID with a first address corresponding to a first to-be-tested port, and the second entry comprises a second VLAN ID with a second address corresponding to the second to-be-tested port; after the to-be-tested ports respectively send out packets, the to-be-tested network device transmits each packet back to the corresponding to-be-tested port through the inside of the to-be-testednetwork device according to the corresponding entry of the L2 table.

Description

technical field [0001] The invention relates to a network transmission detection system, in particular to a network transmission detection system which is provided with an L2 table to use a small packet as a test packet and can also achieve full line load. Background technique [0002] Generally speaking, before network communication devices (such as: routers, network switches, network servers, etc.) It has good transmission efficiency, but the workers in the field found that these network communication devices are not fully loaded, even if they have passed the test, when the user performs a self-test on each of the network communication devices, it may be found that there is no According to the problem of meeting the test standard, the inventor believes that making these network communication devices start to test the network transmission rate after the line is fully loaded will definitely make the test results more accurate. [0003] Continuing from the above, the current...

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Problems solved by technology

[0004] (1) Loopback Test (Loopback Test): It enables a network communication device to send a packet of a specific format to itself to verify the contents of the packet. However, due to the central processing unit (CPU) of the network communication device, on the one hand A packet needs to be generated, and on the other hand, the packet must be verified, so the transmission rate of the packet will be slower;

[0005] (2) Saturation Test: It is to put all the communication ports (ports) of the network communication device in the same virtual area network (Virtual Local Area Network, referred to as VLAN), after that, the network communication device will broadcast (Broadcast), send packets of different sizes to its own communication port, and then check these packets for the first time until the network communication device reaches the full load of the line, and after waiting for a predetermined detection period, check again within the predetermined detection period In this way, the network communication device is more able to detect errors and problems that will occur under high-speed transmission. However, due to the flow of packets of various sizes in the network system, it is more difficult to accurately detect Correct network transmission rate;

[0006] (3) Snake Test (Snake Test): It is to connect all the communication ports of the network communication device in series, so that the packet can be transmitted from the first communication port to the last communication port. However, due to the central processing of the network communication device The unit (CPU) also needs to generate packets on the one hand, and verify the packets on the other hand. Therefore, it is often impossible to generate enough packets to achieve full load of the line;

[0007] (4) External Test (External Test): It is to send and receive packets through an external test machine under the same network environment as the aforementioned snake test. To verify the function of the virtual area network, however, due to the high cost of the external test machine, and the subsequent regular repair and maintenance costs, it is not in line with the actual benefits

However, after subsequent actual use, the applicant found that due to the Memory Management Unit (MMU) inside the new SoC (System on a Chip), when transmitting packets, the limited resource allocation method will cause unknown packets (Unknown Unicast), multicast (Multicast) and broadcast (Broadcast) have usage restrictions. In this case, when the packet is less than a certain length, that is, when the network communication device forwards with a small packet, the application After people use the aforementioned network speed test method, the network transmission speed of the network communication device will not meet the standard, so that the network communication device cannot use small packets to achieve full-load transmission for network speed testing

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