TWI387260B - A method of using a network switch as a network device to test a device - Google Patents

Description

Method of using network switch as a network device test instrument

The invention relates to a method for using a network switch as a network device test instrument, in particular to use a reference switch (Switch) as a performance test instrument, through which the VLAN, PVID and Port- The setting of Number sends a certain amount of data packets to a switch to be tested, and determines the performance and quality of the switch to be tested according to the speed and quantity of the packets returned by the switch to be tested according to the packets.

The development of computer networks has been inseparable from our lives. The widespread use of computer networks has highlighted the importance of network devices. In general, commonly used network devices include: Repeater, Hub (Hub) ), Bridge, Switch, Router, Gateway, etc. Each network device has different functions and prices, depending on the size and needs of the network. set. The above-mentioned network equipment must undergo repeated tests during the design stage and manufacturing to become a commercialized commercial product, and in the case of a general hub or switch, the conventional There are several test methods.

Please refer to Figure 1 first. Figure 1 shows one of the traditional methods of testing a hub or switch. As can be seen from the figure 1, in the prior art, when a hub 13 or a switch having a small number of ports is manufactured (for example, two to four ports), the state of all defects is manually tested manually. The test method is to insert a plurality of network cards 12 (LAN Cards) on a plurality of computers 11 and connect them to the hubs of the hubs via the connection lines, and then the complex A plurality of computers send test packets, and the packets are transmitted to each of the hubs via the connecting lines. If the devices can normally receive and respond to the test packets, they are considered normal; otherwise, they are abnormal. However, this test method requires the use of multiple computers and multiple network cards, which are costly.

Please refer to FIG. 2 again. FIG. 2 is a schematic structural diagram of a test device of another conventional test hub method. As shown in FIG. 2, when the number of ports of the hub 24 is increasing, the method disclosed in FIG. 1 is insufficient to meet the requirements of the production test. The method disclosed in FIG. 2 uses a programmable automatic control relay. The box 23 (Relay Box) is used for testing, after the test packet is generated by at least one computer 21, and then the relay box 23 (Relay Box) is used as a port switch to test the test. The hub, the test method can obtain better test results, but the transmission speed of the hub has been developed from the mainstream 10M/100Mbps to 10Gbps, and the conventional test method has been unable to cope with the test packet generated by such high-speed transmission speed.

As the use of the network grows, the demand for network equipment increases, and the switching of Relay Box shown in Figure 2 is not fast enough, and network equipment manufacturers cannot meet market demand with limited cost considerations. When the network equipment is shipped, many network equipment manufacturers develop their own test equipment or purchase high-priced test equipment for testing.

Self-developed test equipment such as ACCTON TESTB1T 8G 24+4G, as shown in Figure 3. Among them, the self-developed test equipment 33 (TESTBIT) contains a processor, which can control and test the delivery of the package, mainly by equipment 33 ( TESTBIT) generates a test packet to be transmitted to the network device 34 to be tested, and then the computer 31 controls and returns the test result. As shown in Figure 4, you can purchase a high-priced test equipment for testing. To test by using a recognized standard test equipment such as SmartBit or IXIA 44, the basic architecture includes a computer 41, a standard test equipment 43 and a network device 44 to be tested, and its operation principle and the architecture shown in FIG. the same.

The methods for testing network devices in the above-mentioned conventional technologies all have their own shortcomings. Some of them are that the speed of the test device cannot keep up with the speed of product development, or the speed of the test device itself is too slow to effectively detect the product to be tested. The failure, or the dedicated test instrument used specifically for testing a hub or switch, is costly, increases the cost of testing, etc., and the present invention uses a network switch as a network device test instrument that utilizes a reference switch As a performance test instrument, through the setting of VLAN, PVID and Port-Number on the reference switch, the transmission speed and quantity of the packet can be used to judge the performance and quality of the switch to be tested. The method is simple, easy to construct and saves a lot. Time and cost of testing.

In order to solve the above-mentioned shortcomings of the prior art, the present invention provides a method for using a network switch as a network device test instrument. The main purpose of the present invention is to use a switch as a test instrument, which utilizes a As a benchmark performance test instrument, the switch replicates the packet in a specific way through the settings of VLAN, PVID and Port-Number on the reference switch, and determines the performance and quality of the switch to be tested through the transmission speed and quantity of the packet. To achieve significant savings in testing time and cost.

In order to achieve the above object, a method for using a network switch as a network device test instrument according to the present invention utilizes a switch (Switch) as a benchmark performance test instrument through which the reference switch is used. The setting of the VLAN, the PVID, and the Port-Number, sending a certain amount of data packets to a switch to be tested, and determining the performance of the switch to be tested according to the speed and quantity of the packets to be tested by the switch to be tested, The method includes: setting a position corresponding to each of Port-Number, PVID, and VLAN of each of the reference switches; and connecting one of the first ports of the reference switch to a packet generating device (such as a personal computer) PC) generating, by the packet generating device, a number of packets, and transmitting the packets to the first port of the reference switch; after receiving the packets, the first packet is copied and transmitted to the first packet One of the other PVIDs in the VLAN to which the first port belongs, the second port and the third port, to generate a packet loop (Packet LoopStorm); setting a fourth port and a fifth port on the reference switch, And setting the VLAN of the fourth port and the fifth port so that the packet can be received from the second port and the third port; connecting the fourth port and the fifth port to two ports on the switch to be tested Form a packet transmission loop; modify the first PV 埠 PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV PV The speed and quantity of the packet transmitted back through the packet transmission loop on the switch to be tested to determine the performance of the switch to be tested.

As described above, in order to solve the problems and disadvantages faced by the test network device in the prior art, the present invention particularly discloses a method for using a network switch as a network device test instrument. As shown in FIG. 5, the method The method includes at least: Step 51: Set Port-Number, PVID (Port VLAN ID, VLAN ID) and VLAN (Virtual Local Area Network) of the reference switch. Corresponding location between the two; step 52: connecting one of the first switches on the reference switch to a packet generating device (such as a PC); Step 53: generating a number of packets by the packet generating device, and The packet is transmitted to the first port of the reference switch. Step 54: After receiving the packets, the first packet is copied and then transmitted to a second corresponding to another PVID in the VLAN to which the first port belongs. And a third loop to generate a packet loop (Packet LoopStorm); step 55: setting a fourth loop and a fifth loop on the benchmark switch, and setting the fourth stack and the fifth loop The VLAN is configured to receive the packet from the second port and the third port; Step 56: connect the fourth port and the fifth port to two ports on the switch to be tested to form a packet transmission loop; Step 57: Modifying the PVID of the fourth and fifth 及 and the VLAN corresponding to the first 埠So that the packet transmitted to the first port can be directly copied and transmitted to the fourth and fifth frames; step 58: stopping the generation and transmission of the packet; and step 59: transmitting the packet from the to-be-tested switch The speed and number of packets returned by the transmission loop to determine the performance of the switch to be tested.

It can be seen from the above steps that before using a network switch as a network device test instrument, it is necessary to set the relationship and location between each port-number, PVID and VLAN on the switch. .

Please refer to FIG. 6A first. FIG. 6A is a schematic diagram of a reference switch setting embodiment in the method of using a network switch as a network device test instrument according to the present invention. As shown in FIG. 6A, in the present embodiment, it is assumed that four ports are selected as test ports on the reference switch, and the Port-Numbers are A, B, C, and D, respectively, and each port needs to be set. PVID and VLAN, in this embodiment, it is assumed that the PVID and VLAN settings of A, B, C, and D are respectively: the PVID of the armor is A, and the VLAN of the armor is (A, Y) - that is, the VLAN The PVIDs corresponding to the members in (A, Y) are A and Y respectively, and the PVID and VLAN of B are blank (since this is not used in this embodiment), the PVID of B is B, and the VLAN of C is (A, B), the PVID of Kenting is B, and the VLAN of Kenting is (B, C). Set the relationship and location between each port-number, PVID and VLAN on the reference switch. The setting can be implemented by software, and then the armor on the reference switch can be connected. The packet generating device, in this embodiment, is a personal computer (PC), and then the packet generating device generates a number of packets and transmits the packets to the armor of the reference switch, the armor receiving After the packets are copied, the packets are copied and transmitted to the other PVIDs in the VLAN (A, Y) to which the armor belongs. To achieve the purpose of the present invention, the buffers must be formed by Internal Loopback. Wiring method, as can be seen from this embodiment, the PVID of both 埠 and 埠 is set to B, and the VLAN of 埠 为 is (A, B), so 埠 C will receive the packets, and the VLAN of 埠丁(B, C), so the Kenting will also receive the packets, so the packets will be copied to the C and C and the Packet LoopStorm will be generated between the C and C. The so-called Packet LoopStorm, that is, the packet is transmitted in a certain path and forms an infinite Circle, no exit loop, in the absence of specific restrictions in this loop The transmission speed of the packet will reach the maximum value of the interface on the switch, and the Packet LoopStorm will be generated between the C and C, so that the VLANs covering the C and C will also pass the packet at the speed of the LoopStorm. . After the completion of the generation, transmission and replication of the packet, the other two PVIDs and VLANs are set on the reference switch. In this embodiment, as shown in FIG. 6B, the PVIDs of 埠1 and 埠2 are set, and the PVID of 埠1 is The VLAN of X, 埠1 is (B, Y), the PVID of 埠2 is X, and the VLAN of 埠2 is (B, Y). As mentioned above, a packet storm loop is generated between 埠 and 埠. LoopStorm), so that the VLANs that cover both the C and C are also transmitted at the speed of the LoopStorm. Therefore, in this embodiment, the 埠1 and 埠2 in Figure 6B will also transmit the packets out at the speed of the loopstrom. And can achieve the wire-speed output flow to test the performance of the switch to be tested. Then, the 埠1 and 埠2 can be connected to two 上 on the switch to be tested to form a packet transmission circuit, the schematic diagram is as shown in FIG. 6C, and then the PVIDs of 埠1 and 埠2 are changed to S. And modify the VLAN (A, Y) of the armor to VLAN (A, Y, S). At this time, the packet received by the armor can be copied and transmitted to 埠1 and 埠2. After a period of testing, the generation and transmission of the packet can be stopped, and the method of stopping the packet generation can be completed by disabling the method of the buffer and the buffer on the switch, and then by the exchange to be tested. The speed and quantity of the packet transmitted back to determine the performance and quality of the switch to be tested.

In summary, the structural features and embodiments of the present invention have been disclosed in detail, and can fully demonstrate that the present invention has deep progress in the purpose and efficacy of the present invention, and has great industrial value, and is currently The unprecedented use in the market, according to the spirit of the patent law, the invention is fully in line with the requirements of the invention patent.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent variations and modifications made by the scope of the present invention should still belong to the present invention. Within the scope of the patent, I would like to ask your review committee to give a clear understanding and pray for it. It is the prayer.

11‧‧‧ computer

12‧‧‧Network card

13‧‧‧Network device to be tested

21‧‧‧ computer

22‧‧‧Network card

23‧‧‧Relay box

24‧‧‧Network device to be tested

31‧‧‧ computer

32‧‧‧Network card

33‧‧‧ Self-developed testing equipment

34‧‧‧Network devices to be tested

41‧‧‧ computer

42‧‧‧Network card

43‧‧‧Standard test equipment

44‧‧‧Network device to be tested

51, 52, 53, 54, 55, 56, 57, 58 and 59 ‧ ‧ process steps

61‧‧‧ computer

62‧‧‧Switch

63‧‧‧Network devices to be tested

FIG. 1 is a schematic structural diagram of an embodiment of a conventional test network device.

Figure 2 is a block diagram showing another embodiment of a conventional test network device.

Figure 3 is a block diagram showing another embodiment of a conventional test network device.

Figure 4 is a block diagram showing another embodiment of a conventional test network device.

FIG. 5 is a schematic flow chart of a method for using a network switch as a network device test instrument in the present invention.

Figure 6A is a schematic diagram showing the corresponding positions between Port-Number, PVID and VLAN of the reference switch in the present invention.

FIG. 6B and FIG. 6C are schematic diagrams of adjusting the PVID and VLAN of each of the reference switches in the test process according to the present invention.

51, 52, 53, 54, 55, 56, 57, 58 and 59 ‧ ‧ process steps

Claims (7)

A method for using a network switch as a network device test instrument, the method comprising at least: (a): setting a port number of the switch (Port-Number), and a virtual area network identification code of the port (Port VLAN ID, PVID) and the virtual local area network (VLAN) corresponding to the location; (b): the first one of the switch is connected to a packet generating device; c): generating, by the packet generating device, a plurality of packets, and transmitting the packets to the first port of the switch; (d): after receiving the packets, the first packet is copied and transmitted to the packet One of the second and third ports corresponding to the other PVIDs in the VLAN to which the first port belongs to generate a packet loop (Packet LoopStorm); (e): setting one of the fourth ports on the switch a fifth port, and setting the VLAN of the fourth port and the fifth port so that the packet can be received from the second port and the third port, and a packet storm is formed between the fourth port and the fifth port a loop (Packet LoopStorm); (f): connecting the fourth and fifth turns to a two-way on the network device to be tested a packet transmission loop; (g): modifying the PVID of the fourth and fifth loops and the VLAN correspondence of the first loop so that the packet transmitted to the first stack can be directly copied and transmitted to the fourth stack and (h): stopping the generation and transmission of the packet; and (i): determining the performance of the test network device by the speed and quantity of the packet transmitted back through the packet transmission circuit on the network device to be tested. The method for using a network switch as a network device test instrument according to the first aspect of the patent application, wherein the packet generating device can be a computer. The method of using a network switch as a network device test instrument according to the first aspect of the patent application, wherein the network device to be tested can be a switch to be tested. The method of using the network switch as a network device test instrument according to the first aspect of the patent application, wherein the network device to be tested can be a hub to be tested. For example, in the method of claim 1, the network switch is used as a network device test instrument, wherein the step (f) of stopping the generation and transmission of the packet can be completed by resetting the VLAN. A method for using a network switch as a network device test instrument as described in claim 1, wherein the step (f) stops the generation of the packet and transmits the disableable switch on the switch. The second and third methods are completed. For example, the network switch is used as a network device test instrument according to the first aspect of the patent application, wherein a software can be used to set Port-Number, PVID and VLAN of each switch on the switch. The corresponding positional relationship between them.