CN101826998B - Method for Realizing Full Switching Function Test of Switching Fabric and Switching Fabric - Google Patents

Abstract

The embodiment of the invention discloses a method for realizing a full switching function test of an exchange net and the exchange net, relates to a test technology, and aims to reduce the cost of the full switching function test of the exchange net. The method comprises the following steps: the first sending port sends a first test message to the data unit exchange module; the data unit exchange module exchanges the received first test message to each receiving port; and the receiving port sends a second test message to a corresponding sending port, so that the sending port checks the second test message sent by the receiving port according to the sending condition of the first test message. The embodiment of the invention is mainly used for the exchange mesh.

Description

Method for Realizing Full Switching Function Test of Switching Fabric and Switching Fabric

technical field

The invention relates to testing technology, in particular to a method for realizing the full switching function test of a switching network chip and a switching network chip.

Background technique

At present, data communication products such as mainstream routers and switches in the industry generally adopt the M-S-M three-level switching architecture design, and the switching network ASIC chip (hereinafter referred to as the switching network chip) is the core chip of the switching function of the intermediate level (S) line.

The switching fabric is mainly composed of four parts: high-speed Serdes (Serializer/Deserializer, serializer/deserializer) bus interface module (Serdes RX, Serdes TX), high-speed Serdes transceiver control module (RX controller, TX controller), DCS ( Data Cell Switch, data unit exchange) module and MPI (Microprocessor Interface, microprocessor interface) module, etc. Among them, the DCS module is the core module of the switching fabric.

In the current switching network test chip, the industry generally adopts two methods.

The first way is Serdes loopback built-in self-test (Build-In Self Test, BIST). In this technology, in the Serdes bus interface module, usually under the control of the high-speed Serdes transceiver control module, data is transmitted between the corresponding receiving and transmitting interfaces, for example, TX1 sends data, RX1 receives data, TX2 sends data, RX2 receives data. In this way, the test of the switching fabric can cover the high-speed Serdes bus interface module and the high-speed Serdes transceiver control module. However, in this way, data can only be transmitted between the corresponding transceiver interfaces, so the data transmission process between different transceiver interfaces such as TX1 sending data and RX2 receiving data cannot be tested.

In order to make up for the defect that the first method cannot perform the full switching function test of the switching fabric, in the second method, a fully equipped M-level board is added to realize the transmission between the corresponding transceiver interface or the non-corresponding transceiver interface. Data, so as to realize the full switching function test of the switching fabric.

However, in the process of realizing the present invention, although the test of the full switching function of the switching fabric is realized according to the above-mentioned second method, the cost of this method is relatively high due to the addition of M-level boards.

Contents of the invention

Embodiments of the present invention provide a method for implementing a full switching function test of a switching fabric and a switching fabric, which can reduce the cost of performing a full switching function test on a switching fabric.

The embodiment of the present invention adopts following technical scheme:

A method for realizing a full switching function test of a switching fabric, comprising:

The first sending port sends the first test message to the data unit switching module;

The data unit switching module switches the received first test message to each receiving port;

The receiving port sends the second test message to the corresponding sending port, so that the sending port verifies the second test message sent by the receiving port according to the sending condition of the first test message.

A switching fabric, comprising: at least one sending port, a data unit switching module, and at least one receiving port; wherein,

The at least one sending port is configured to send a first test message to the data unit switching module, receive a second test message sent by the receiving port, and send the first test message according to the sending situation of the first test message. Verifying the second test message sent by the receiving port;

The data unit switching module is configured to receive the first test message sent by the sending port, and switch the first test message to the receiving ports;

The at least one receiving port is used to receive the first test message exchanged by the data unit switching module, and send the second test message to the sending port.

The method for realizing the full switching function test of the switching network chip and the switching network chip in the embodiment of the present invention configure the sending port so that it has message sending and verification functions at the same time, and then the test message sent by the sending port is switched to All the receiving ports, and send the data sent by the receiving port to the sending port for verification, so as to complete the full switching function test of the switching fabric. It can be seen from this that, using the switching fabric and the method of the embodiment of the present invention, there is no need to configure an M-level board. Therefore, compared with the prior art, the switching fabric and the method of the embodiment of the present invention can reduce The cost of a full switch functional test.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that are used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the flow chart of the method for realizing the full switching function test of switching fabric piece in the embodiment of the present invention;

FIG. 2 and FIG. 3 are respectively schematic diagrams of message delivery in Embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of a switching fabric according to Embodiment 2 of the present invention;

FIG. 5 is a structural diagram of a switching fabric according to Embodiment 2 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Here, firstly, the concept of "full switching function test" is explained. The so-called full switching function test means that the test of the switching fabric covers all the functional modules in the switching fabric, so that the message sent by each sending port can be transmitted to any receiving port, and the test on the sending port Whether the communication path to each receive port is available.

In order to reduce the cost of performing a full switching function test on a switching fabric, as shown in Figure 1, Embodiment 1 of the present invention provides a method for implementing a full switching function test of a switching fabric, including:

Step 11, the first sending port sends the first test message to the data unit switching module.

Here, for the convenience of description, the concept of "first sending port" is proposed. It should be noted that the switching fabric may include multiple sending ports, and each sending port may serve as the "first sending port" described herein. That is to say, "the first sending port" does not specifically refer to a certain sending port, but is only a concept proposed for the convenience of description as mentioned above.

In addition, because the full function of the switching fabric is tested, according to the above explanation of the concept of full function testing, here, the first sending port sends the first test message to the data unit inside the switching fabric Switch modules.

Step 12: The data unit switching module switches the received first test message to each receiving port.

In this step, the data unit switching module can switch the first test message received by the first sending port to each receiving port through at least one of the following two ways.

The first way: the data unit switching module can parse the first test message to obtain destination receiving port information of the first test message. In the first test message, its message header includes a 64-byte information element, which is used to indicate the destination receiving port of the first test message sent by the first sending port, that is, the first To which receiving port the sending port wants to send its first test packet. For example, assuming there are 7 receiving ports, and the first sending port wants to send its first test message to the first receiving port, then the first test message can be included in the header of the first test message. The information of the receiving port, such as the label and address of the receiving port. The remaining 6 ports are handled in a similar manner. Since the full switching function test is performed, the first test message of the first sending port needs to be sent to all receiving ports.

The second way: After receiving the first test message sent by the first sending port, the data unit switching module can obtain the first sending port information for sending the first test message, such as the first The number, address, etc. of the sending port. Then, switch the first test message to the corresponding receiving port according to the configuration information in its own register. For example, still take 7 sending ports and 7 receiving ports as an example. Taking the port whose port number is 1 as an example, the number of times of the first test message sent by the sending port, the corresponding relationship table of the sending port information and the receiving port information can be stored in the data unit switching module, as shown in Table 1 Show:

As can be seen from Table 1, when the data unit switching module determines that the first test message it receives is from the sending port numbered 1, it can count the number of times it receives the first test message from the sending port . When the first test message of the sending port is received for the first time, the first test message is sent to the receiving port numbered 1; when the first test message of the sending port is received for the second time, Send the first test packet to the receiving port numbered 2. Until the first test packet of the sending port is sent to all 7 receiving ports.

Of course, the corresponding manner in Table 1 may also have other forms. It should be noted that this is just an example to describe how to send the first test packet of the first sending port to each receiving port according to the configuration of the data unit switching module itself. In specific applications, there may be other implementation manners, which are not limited by the examples given here.

Step 13. The receiving port sends the second test message to the corresponding sending port, so that the sending port verifies the second test message sent by the receiving port according to the sending condition of the first test message.

As described in step 11, the concept of "first sending port" is proposed in the embodiment of the present invention. Since the data verification process can be performed on all sending ports of the switching fabric in the embodiment of the present invention, it is necessary to make the above distinction for each sending port.

When the sending port is the first sending port, the receiving port sends the second test message to the first sending port, and then the first sending port sends the second test message according to the first test message Check the received second test message according to the sending status of the test message. In the verification process, according to the information of the first test message sent by it recorded on the first sending port, such as the quantity and format of the first test message sent, the received second test message The text is verified. If the verification is passed, the full switching function test is successful, otherwise it fails.

When the sending port is not the first sending port, the sending and receiving control module in the switching fabric obtains the relevant information of the first test message sent by the first sending port from the first sending port, such as The number and format of the first test message to be sent, and the relevant information is sent to the sending port, and then the sending port checks the received second test message. During the verification process, relevant information can be obtained according to the sending port, such as the quantity and format of the first test messages sent by the first port, and the received second test messages can be verified. If the verification is passed, the full switching function test is successful, otherwise it fails.

Here, it should also be noted that, if the data unit switching module has a bidirectional switching function, then the receiving port can also send its second test message to the data unit switching module. Correspondingly, the data unit switching module may switch the second test message of the receiving port to the sending port by itself.

As can be seen from the above, using the method of Embodiment 1 of the present invention, by configuring the sending port so that it has message sending and verification functions at the same time, and then switching the test message sent by the sending port to all receiving ports, And send the data sent by the receiving port to the sending port for verification, so as to complete the full switching function test of the switching fabric. It can be seen that, using the method of the embodiment of the present invention, there is no need to configure an M-level board. Therefore, compared with the prior art, the method of the embodiment of the present invention can reduce the cost of performing a full switching function test on the switching fabric.

In the embodiment of the present invention, the message transfer process between the sending port, the data unit switching module and the receiving port is shown in FIG. 2 and FIG. 3 . As shown in FIG. 2 , the test messages of the sending port IPX1 are sent internally, that is, are switched to each receiving port such as OPX1 . . . OPX71 after passing through the data unit switching module. Then, the test message sent by OPX1...OPX71 is sent to the corresponding sending port through the outside. Certainly, the test message sent by OPX1 . . . OPX71 may not be sent to the corresponding sending port. As shown in FIG. 3 , the test messages of the sending port IPX1 are sent internally, that is, are switched to each receiving port such as OPX1 . . . OPX71 after passing through the data unit switching module. Taking the receiving port OPX1 as an example, the test message sent by this port can be switched to any sending port through the data unit switching module in an internal sending manner. Other receive ports are similar. It should be noted that this is only an example to illustrate the message delivery process in the embodiment of the present invention.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

As shown in FIG. 4 , Embodiment 2 of the present invention provides a switching fabric, including: at least one sending port 21 , a data unit switching module 22 , and at least one receiving port 23 . in,

The at least one sending port 21 is configured to send a first test message to the data unit switching module, receive a second test message sent by the receiving port, and send the first test message according to the sending situation of the first test message Verifying the second test message sent by the receiving port;

The data unit switching module 22 is configured to receive the first test message sent by the sending port 21, and switch the first test message to the receiving ports;

The at least one receiving port 23 is configured to receive the first test message exchanged by the data unit switching module 22 and send the second test message to the sending port 21 .

Likewise, in this embodiment, the data unit switching module can be configured to have a one-way or two-way switching function. If the data unit switching module has a one-way switching function, then the receiving port directly returns the second test message to the sending port. If the data unit switching module has a two-way switching function, then, when the receiving port sends the second test message to the sending port, the second test message is switched to the said data unit switching module through the data unit switching module. the sending port described above. That is, the receiving port may send its second test message to the data unit switching module, and the data unit switching module may switch the second test message of the receiving port to the data unit switching module by itself. sending port.

The same as described in the method embodiments, for the convenience of description, the concept of "first sending port" is also proposed here. The switching fabric slice may include multiple sending ports, and each sending port may serve as the "first sending port" described herein. That is to say, the "first sending port" does not specifically refer to a certain sending port.

When the receiving port sends the second test message to the sending port, it is sent to each sending port. When sending to the first sending port, in the verification process, the first sending port can record the information of the first test message it sends on it, such as the number of the first test message sent , format, etc., and verify the received first test message. If the verification is passed, the full switching function test is successful, otherwise it fails.

When sending to other sending ports, as shown in Figure 5, the switching fabric can also include: a transceiver control module 24, used to obtain the first test report sent by the first sending port by the first sending port related information of the document, and send the related information to the sending port. At this time, the sending port may verify the received second test message according to the obtained relevant information, such as the quantity and format of the first test message sent by the first port. If the verification is passed, the full switching function test is successful, otherwise it fails.

In the switching fabric shown in FIG. 4 or FIG. 5, when the data switching module 22 switches the first test message to the receiving ports, it is specifically used to parse the first test message, Obtaining destination receiving port information of the first test message, and switching the first test message to a corresponding receiving port according to the destination receiving port information. Alternatively, when the data exchange module 22 exchanges the first test message to each of the receiving ports, it is specifically used to obtain and send the first sending port information, and according to its own configuration information, send the first test message to the receiving port. A test packet is switched to the corresponding receiving port.

For the working principle of the switching fabric in the embodiment of the present invention, reference may be made to the description in the method embodiment.

As can be seen from the above, the switching fabric of the embodiment of the present invention configures the sending port so that it has message sending and verification functions at the same time, and then switches the test message sent by the sending port to all receiving ports, And send the data sent by the receiving port to the sending port for verification, so as to complete the full switching function test of the switching fabric. It can be seen from this that using the switching fabric of the embodiment of the present invention does not need to configure an M-level board. Therefore, compared with the prior art, the switching fabric and the method of the embodiment of the present invention can reduce the cost of performing full switching on the switching fabric. The cost of functional testing.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (11)

1. A method for realizing the full switching function test of the switching network sheet, is characterized in that, comprising: The first sending port sends the first test message to the data unit switching module; The data unit switching module switches the received first test message to each receiving port; The receiving port sends the second test message to the corresponding sending port, so that the sending port verifies the second test message sent by the receiving port according to the sending condition of the first test message. 2. The method according to claim 1, wherein the data unit switching module switching the received first test message to each receiving port comprises: Analyzing the first test message to obtain destination receiving port information of the first test message; Switching the first test message to a corresponding receiving port according to the destination receiving port information. 3. The method according to claim 1, wherein the data unit switching module switching the received first test message to each receiving port comprises: Obtain information about the first sending port for sending the first test packet; Switching the first test message to a corresponding receiving port according to its own configuration information. 4. The method according to claim 1, wherein, when the sending port is the first sending port, the receiving port sends the second test message to the corresponding sending port, so that the sending port according to The sending situation of the first test message, and verifying the second test message sent by the receiving port includes: The receiving port sends the second test message to the first sending port via the data unit switching module or directly, so that the first sending port can send the second test message to the first test message according to the sending situation of the first test message. The second test message sent by the receiving port is verified. 5. The method according to claim 1, wherein, when the sending port is not the first sending port, sending the second test message to the corresponding sending port at the receiving port, so that the sending port Before verifying the second test message sent by the receiving port according to the sending situation of the first test message, the method further includes: The sending and receiving control modules respectively connected to the sending port and the first sending port obtain the related information of the first test message sent by the first sending port through the first sending port, and send the related information to the send port. 6. The method according to claim 5, characterized in that, the receiving port sends the second test message to the corresponding sending port, so that the sending port performs a test on the receiving port according to the sending situation of the first test message. The verification of the second test message sent by the port includes: The receiving port sends the second test message to the sending port via the data unit switching module or directly, so that the sending port performs a check on the second test message sent by the receiving port according to the relevant information. The text is verified. 7. A switching network chip, characterized in that it includes: at least one sending port, a data unit switching module, and at least one receiving port; wherein, The at least one sending port is configured to send a first test message to the data unit switching module, receive a second test message sent by the receiving port, and send the first test message according to the sending situation of the first test message. Verifying the second test message sent by the receiving port; The data unit switching module is configured to receive the first test message sent by the sending port, and switch the first test message to the receiving ports; The at least one receiving port is used to receive the first test message exchanged by the data unit switching module, and send the second test message to the sending port. 8. The switching fabric chip according to claim 7, wherein when the sending port is not the first sending port, wherein the first port is the port sending the first test message, the switching The mesh also includes: A transceiver control module connected to the sending port and the first sending port respectively, configured to use the first sending port to obtain relevant information of the first test message sent by the first sending port, and send the sending relevant information to the sending port; When verifying the second test message sent by the receiving port, the sending port verifies the second test message sent by the receiving port according to the relevant information. 9. The switching fabric according to claim 7 or 8, wherein the receiving port is further used to send a second test message to the data unit switching module, and the data unit switching module is further used to convert the The second test message received by each receiving port is switched to the corresponding sending port. 10. The switching fabric chip according to claim 7 or 8, wherein the data switching module is specifically used for parsing the first test message when switching the first test message to the receiving ports. To test a message, obtain destination receiving port information of the first test message, and switch the first test message to a corresponding receiving port according to the destination receiving port information. 11. The switching fabric chip according to claim 7 or 8, wherein the data switching module is specifically used to obtain and send the first test message when switching the first test message to the receiving ports. information about the first sending port of a test message, and switch the first test message to a corresponding receiving port according to its own configuration information.

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