WO2012155777A1

WO2012155777A1 - Virtual switch cluster data transmission method, device and equipment

Info

Publication number: WO2012155777A1
Application number: PCT/CN2012/074687
Authority: WO
Inventors: 田奇
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-15
Filing date: 2012-04-25
Publication date: 2012-11-22
Also published as: CN102291304A

Abstract

Disclosed is a VSC data transmission method, comprising: a VSC data forwarding module at a sending end receiving an Ethernet data frame; calculating a Seq value of the Ethernet data frame; embedding the Seq value into the Ethernet data frame to form a VSC data frame, and sending the VSC data frame to a receiving end; a VSC data receiving module at the receiving end parsing the received VSC data frame to obtain the Seq value therein; and when determining that the extracted Seq value = (Seq the value of a receiving register +1) mod Seq the maximum value of the receiving register, unpacking the VSC data frame into the Ethernet data frame and sending the Ethernet data frame to a Layer 2 protocol stack. The present invention further provides a corresponding device. The VSC data transmission device and equipment provided in the present invention improve the reliability of stack cable transmission while ensuring high-speed transmission of VSC data.

Description

Method, device and device for virtual switch cluster data transmission

The present invention relates to the field of communications, and in particular, to a method, device and device for data transmission of a VSC (Virtual Switch Cluster). Background technique

The VSC system is a network virtualization technology that combines multiple physical devices that can be run separately into one virtual device. These separate physical devices are linked together by stacking boards and discover each other through a topology discovery protocol. A master device is selected through a certain mechanism, and other devices serve as forwarding roles.

After the VSC is formed, any member can log in to the VSC system to manage all the member devices in the VSC. Instead of physically configuring and managing each member device, the management is simplified. At the same time, various control protocols running in the virtual device formed by the VSC are also uniformly operated as a single device, which simplifies the network. In addition, by supporting link aggregation across devices, protocol-level and device-level hot backup across devices can be implemented. . When a device in a VSC system fails, the service can be quickly switched to another device, which is faster than VRRP (Virtual Router Redundancy Protocol). The reliability of the entire system is further improved. Finally, since the VSC system is virtualized by multiple devices, the switching capacity and the number of ports of the VSC system are the sum of the switching capacity and the number of ports of all the single-device devices in the VSC, thereby greatly improving the performance of the device.

The VSC is composed of a plurality of stacking switches, and each stacking switch in the VSC is connected by a stacking cable, and each stacking switch in the VSC performs information transmission through the stacking cable.

Existing stack cable communication strategies usually use conventional TCP/IP (Transmission Control) Protocol/Internet Protocol, Protocol Control Protocol/Internet Protocol, when the packet is lost or damaged during the transmission of the stack cable, it is directly discarded. The upper layer of TCP/IP negotiates ICMP (Internet Control). The Message Protocol, the Internet Control Protocol, informs the sender to re-send the packet. If the stack link is in poor condition, a large number of packets will be retransmitted, which will burden the stack link and reduce the stacking line. The reliability of cable transmission. Summary of the invention

The main object of the present invention is to provide a method, device and device for VSC data transmission, which can improve the reliability of stack cable transmission while ensuring high-speed transmission of VSC data.

The present invention provides a method for VSC data transmission, the method comprising:

The VSC data forwarding module at the transmitting end receives the Ethernet data frame;

Calculate the Seq value of the Ethernet data frame;

The Seq value is embedded in the Ethernet data frame to form a VSC data frame, and is sent to the receiving end; the VSC data receiving module of the receiving end parses the received VSC data frame to obtain a Seq value therein;

When it is determined that the extracted 86 value = (Seq Receive Register Value +1) mod Seq receives the register maximum value, the VSC data frame is unpacked into an Ethernet data frame and transmitted to the Layer 2 protocol stack.

Preferably, the calculating the Seq value of the Ethernet data frame is to calculate the Seq value of the Ethernet data frame by transmitting the register maximum value by the formula Seq = (Seq transmission register value +1) mod Seq.

Preferably, the embedding the Seq value into the Ethernet data frame to form the VSC data frame comprises: combining the VSC data frame format type identifier TPID and the Seq value into a VSC identification field; adding the VSC identification field to the Ethernet data frame in.

Preferably, the method comprises:

The VSC data frame is discarded when it is determined that the extracted Seq value is not equal to (Seq Receive Register Value + 1) mod Seq Receive Register Maximum. The present invention also provides a VSC data forwarding device, the device comprising:

a receiving module, configured to receive an Ethernet data frame;

a calculation module, configured to calculate a Seq value of the Ethernet data frame;

And a conversion module, configured to embed the Seq value into an Ethernet data frame, form a VSC data frame, and send the data to the receiving end.

Preferably, the calculation module is configured to calculate a Seq value of the Ethernet data frame by using a formula Seq=(Seq transmission register value +1) mod Seq transmission register maximum value.

Preferably, the conversion module comprises:

a combining unit, configured to combine the VSC data frame format type identifier TPID and the Seq value into a VSC identifier field;

And adding a unit, configured to add the VSC identity field to an Ethernet data frame.

The present invention also provides a VSC data receiving apparatus, the apparatus comprising:

a receiving module, configured to receive a VSC data frame sent by the VSC data forwarding device at the transmitting end, and a parsing module, configured to parse the VSC data frame;

a sending module, configured to unpack the VSC data frame into an Ethernet data frame and send it to the second layer when determining that the extracted Seq value = (Seq receiving register value +1) mod Seq receiving register maximum value Protocol stack.

Preferably, the parsing module comprises:

The sending module is further configured to discard the VSC data frame when it is determined that the extracted Seq value is not equal to (Seq Receive Register Value +1) mod Seq Receive Register Maximum Value.

The present invention also provides an apparatus for VSC data transmission, including a VSC data forwarding device and at least one VSC data receiving device, wherein

The VSC data forwarding device is configured to receive an Ethernet data frame; calculate a Seq value of the Ethernet data frame; and embed the Seq value into the Ethernet data frame to form a VSC data frame, and send the signal to the VSC data receiving device ; The VSC data receiving apparatus is configured to receive a VSC data frame sent by the VSC data forwarding device; parse the VSC data frame; and when determining the extracted 86 value = (Seq receiving register value +1) mod Seq receiving When the register is at a maximum, the VSC data frame is unpacked into an Ethernet data frame and sent to the Layer 2 protocol stack.

The VSC data receiving apparatus is further configured to discard the VSC data frame when it is determined that the extracted Seq value is not equal to (Seq Receive Register Value +1) mod Seq Receive Register Maximum Value.

The method, device and device for transmitting VSC data according to the present invention extend the conventional TCP/IP protocol, convert the Ethernet data frame into a VSC data frame, and reduce the weight of the message by redundantly transmitting the VSC data frame. The possibility of transmission greatly improves the reliability of Ethernet layer transmission. DRAWINGS

1 is a schematic flowchart of a method for transmitting VSC data according to an embodiment of the present invention;

2 is a format of a VSC data frame in an embodiment of a VSC data transmission method according to the present invention; FIG. 3 is a schematic structural diagram of an embodiment of a VSC data forwarding device according to the present invention;

4 is a schematic structural diagram of a conversion module in an embodiment of a VSC data forwarding device according to the present invention; FIG. 5 is a schematic structural diagram of an embodiment of a VSC data receiving device according to the present invention;

FIG. 6 is a schematic structural diagram of an embodiment of a VSC data receiving device according to the present invention. detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring now to Figure 1, an embodiment of a method of VSC data transmission is described. In this embodiment, the stacking switches are interconnected by two or more stacking cables, and the stacking cables may be optical fibers. Set the VSC data forwarding module on the stack switch that needs to forward Ethernet data frames, and set the VSC data receiving module on the stack switch that needs to receive Ethernet data frames. In practice, the VSC data forwarding module and the VSC data receiving module may also be disposed in the same stacking switch. Both the VSC data forwarding module and the VSC data receiving module can be implemented using an ASIC circuit.

The functions of the VSC data forwarding module include: receiving an Ethernet data frame, converting an Ethernet data frame and a VSC data frame, the VSC data forwarding module may adopt a Seq transmission register, and the Seq transmission register is used for temporarily storing the last transmitted VSC. The Seq value of the forwarded frame. That is to say, the role of the seq register is to temporarily record and save the serial number of the sent vsc message, which is the serial number already used.

The function of the VSC data receiving module includes: parsing the VSC data frame, and transmitting the Ethernet data frame to the Layer 2 protocol stack, where the Layer 2 protocol stack refers to the packet forwarding inside the switch,

The VSC data forwarding module may employ a Seq receive register for suspending the Seq value of the last received VSC forwarded frame.

The above Seq Transmit Register and Seq Receive Register should be the same length, usually set to

16 bits, or set the appropriate length as needed.

As shown in FIG. 1, the method for VSC data transmission in this embodiment is as follows:

Step S101: The VSC data forwarding module of the stacking switch that forwards the Ethernet data frame receives the Ethernet data frame.

Step S102, calculating the value of Seq, the Seq = (Seq transmission register value + 1) mod Seq transmission register maximum value, when the Seq transmission register length is 16 bits, the Seq transmission register maximum value is 65535;

Step S103: Encapsulate the Ethernet data frame into a VSC data frame, and fill in a Seq value.

As shown in FIG. 2, a 4-byte VSC identification field is added after the source address SA of the Ethernet data frame. The VSC identification field includes two domains, each domain occupies 2 bytes, and one domain is used to store the VSC. TPID (Tag Protocol Identifier) of the data frame, the TPID is used to indicate the format type of the VSC data frame, and its value is a fixed size of 0x8101 (can also be set to other fixed values, but need to pay attention to other data formats. Another domain stores a Seq value, which is used to store the sequence number of the VSC data frame transmitted this time. Put a byte of TPID and Source address to the Ethernet data frame

After the SA, a VSC forwarding frame is formed. The size of the above two fields may be changed according to actual application requirements, and is not limited to this embodiment. For example, the domain in which the TPID is stored may be set to 1 byte, and correspondingly, the field in which the Seq value is stored may be set to 3 bytes.

Step S104: Copy the VSC data frame into multiple copies, and send it to all the stacking and stacking cable cables that are connected and connected to the stacking switch, and send and send the one cable cable. One copy;

Step SS110055, the VVSSCC data is received after the receiving module module receives the VVSSCC data frame frame, and obtains the values of the TTPPIIDD and SSeeqq values in the VVSSCC data frame frame. According to the TTPPIIDD, the root format type of the VVSSCC number data frame frame is confirmed, and the SSeeqq value value to be obtained and the SSeeqq value is received and received. The value of the value of the device is compared with the comparison of the row, if the value of SSeeqq is equal to the receiving and receiving register of SSeeqq

1100 value,, the table indicates that the VVSSCC number data frame has been received and received, and there is no need to repeat the repeated receiving and receiving, and the VVSSCC data frame frame is discarded. If SSeeqq value == ((SSeeqq receives the receiving register value ++ 11)) mmoodd SSeeqq receives the maximum value of the receiving and registering register (when SSeeqq receives the receiving and receiving When the length of the register is 1166 bits, the value is 6555553355)), then the VVSSCC flag of the 44-byte byte is removed from the VVSSCC data frame frame. The literacy field segment, will decompress the VVSSCC number data according to the frame frame as the frame number of the data network. .

Step SS110066, sending the obtained data of the Ethernet network number according to the frame frame to the Layer 2 layer protocol protocol stack, and completing the process into VVSSCC

1155 The transmission of data data. .

In the example of the implementation of the present embodiment, the expansion and expansion of the conventional TTCCPP//IIPP agreement will be converted to the VVSSCC data by the frame data of the Ethernet network. According to the frame frame, the VVSSCC data is transmitted and sent according to the redundant redundant transmission of the frame frame, and the drop is reduced, and the possibility of re-issuing the message is reduced, and the reduction can be reduced. The burden of transmission and transmission of the stack of stacked link links is greatly reduced, and the reliability and reliability of the transmission and transmission of the Ethernet network are greatly improved. .

Referring to FIG. 33, the present invention provides a VVSSCC data data transfer forwarding device set 1100, which is an example of implementation. The package includes:

2200 is connected to the receiving and receiving module block 1111, and is used for receiving and receiving the data frame frame of the Ethernet network;

Calculating the modulo module block 1122, using the SSeeqq value for calculating the number of data frames of the Ethernet network;

The conversion conversion module module 1133 is configured to embed the SSeeqq value into the frame frame, and form a VVSSCC data frame frame, and concurrently The VVSSCC number data sent to at most a plurality of receiving and receiving ends is received by the receiving device. . The said receiving and receiving end refers to a stacking stack exchange switching machine that needs to receive and receive the data frame frame of the Ethernet network. .

2255 * a combining unit 131, configured to combine the TPID and Seq values of the VSC data frame into a VSC identification field;

The adding unit 132 is configured to add the VSC identity field to an Ethernet data frame. In this embodiment, the VSC data forwarding device 10 is set on the stack switch that needs to forward the Ethernet data frame, and the VSC data receiving device is set on the stack switch that needs to receive the Ethernet data frame. In practice, the VSC data forwarding device can also be used. The 10 and VSC data receiving devices can also be placed in the same stacking switch. Both the VSC data forwarding device 10 and the VSC data receiving device can be implemented using an ASIC circuit.

The functions of the VSC data forwarding device 10 include: receiving Ethernet data frames, converting Ethernet data frames and VSC data frames, including Seq transmission registers.

The functions of the VSC data receiving device include: parsing the VSC data frame, and passing the Ethernet data frame to the Layer 2 protocol stack, including the Seq receiving register.

The above Seq transmit register and Seq receive register are used to temporarily store the Seq value of the last transmit and receive VSC forwarded frame. The length of the Seq transmit register and the Seq receive register should be the same, usually set to 16 bits, or set the appropriate length as needed.

The receiving module 11 of the VSC data forwarding module of the stacking switch that forwards the Ethernet data frame is configured to receive Ethernet data frames.

The calculation module 12 calculates the value of Seq, the Seq = (Seq transmission register value + 1) mod Seq transmission register maximum value, and when the Seq transmission register length is 16 bits, the Seq transmission register maximum value is 65535.

The conversion module 13 encapsulates the Ethernet data frame into a VSC data frame and fills in the Seq value. As shown in FIG. 2, a 4-byte VSC identifier field is added after the source address SA of the Ethernet data frame, where the identifier field includes two fields, and one is a TPID field of the VSC data frame, including 2 bytes. Indicates the VSC data frame format type, which has a fixed size of 0x8101 (can also be set to other fixed values, but needs to be distinguished from other data formats); the other is the Seq field, also It is 2 bytes and is used to save the serial number of the VSC data frame sent this time.

The combining unit 131 combines the 2-byte TPID and the 2-byte Seq value into a total of 4 bytes of VSC identification field, and the adding unit 132 embeds the source address SA of the Ethernet data frame to form a VSC forwarding frame. . The lengths of the above TPID and Seq values may be changed according to actual application requirements, such as setting the TPID value to 1 byte and the Seq value to 3 bytes, which is not limited to this embodiment.

The conversion module 13 copies the VSC data frames into multiple copies and sends them to all the stacking cables that are connected to the stacking switch, and sends one copy on one cable.

After receiving the VSC data frame, the VSC data receiving device acquires the Seq value in the VSC data frame and compares it with the Seq receiving register value. If the Seq value is equal to the Seq receiving register value, the VSC data frame is discarded; if the Seq value = ( Seq receive register value + 1) mod Seq Receive register maximum value (when the Seq receive register length is 16 bits, the value is 65535), then remove the 4-byte VSC identification field from the VSC data frame, and set the VSC data frame. Unpacked into an Ethernet data frame. The VSC data receiving device sends the obtained Ethernet data frame to the Layer 2 protocol stack for processing, and completes the transmission of the VSC data.

In this embodiment, the conventional TCP/IP protocol is extended to convert the Ethernet data frame into a VSC data frame, and the redundant transmission of the VSC data frame reduces the possibility of message retransmission and greatly improves the Ethernet layer transmission. Reliability.

Referring to FIG. 5, an embodiment of the present invention provides a VSC data receiving apparatus 20, which includes: a receiving module 21, configured to receive a VSC data frame sent by a VSC data forwarding device at a transmitting end;

The parsing module 22 is configured to parse the VSC data frame;

The sending module 23 is configured to, when determining the extracted 86 value = (Seq receiving register value +1) mod Seq receiving register maximum value, unpacking the VSC data frame into an Ethernet data frame and sending it to the second Layer protocol stack. The sending module 23 is further configured to discard the VSC data frame when it is determined that the extracted Seq value is not equal to (Seq receiving register value +1) mod Seq receiving register maximum value.

In this embodiment, a VSC data forwarding device is set on a stack switch that needs to forward an Ethernet data frame, and a VSC data receiving device 20, a VSC data forwarding device, and a VSC data receiving device 20 are disposed on a stack switch that needs to receive an Ethernet data frame. It can also be set in the same stacking switch. The implementation of the VSC data forwarding device or the VSC data receiving device 20 may employ an ASIC circuit.

The functions of the VSC data forwarding device include: receiving Ethernet data frames, converting Ethernet data frames and VSC data frames, including Seq transmission registers.

The functions of VSC data receiving device 20 include: parsing VSC data frames, and passing Ethernet data frames to a Layer 2 protocol stack, including Seq receive registers.

The VSC data forwarding device of the stack switch forwarding the Ethernet data frame receives the Ethernet data frame and calculates the value of Seq, which is equal to (Seq transmission register value + 1) mod Seq transmission register maximum value, when Seq transmission register length When it is 16 bits, the Seq transmit register has a maximum value of 65535.

The VSC data forwarding device encapsulates the Ethernet data frame into a VSC data frame and fills in the Seq value. As shown in FIG. 2, a 4-byte VSC identifier field is added after the source address SA of the Ethernet data frame, where the identifier field includes two fields, and one is a TPID field of the VSC data frame, including 2 bytes. Indicates the VSC data frame format type, which has a fixed size of 0x8101 (can also be set to other fixed values, but need to be distinguished from other data formats); the other is Seq field, also 2 bytes, for saving The serial number of the VSC data frame sent this time.

VSC ID field with 2 bytes of TPID and 2 bytes of Seq value for 4 bytes After being embedded in the source address SA of the Ethernet data frame, a VSC forwarding frame is formed. The lengths of the above TPID and Seq values may be changed according to actual application requirements, such as setting the TPID value to 1 byte and the Seq value to 3 bytes, which is not limited to this embodiment.

The VSC data forwarding device copies the VSC data frames in multiple copies and sends them to all the stacking cables that are connected to the stacking switch, and sends one copy on one cable.

After receiving the VSC data frame by the receiving module 21 of the VSC data receiving device 20, the parsing module 22 parses the VSC data frame to obtain the Seq value in the VSC data frame, and the transmitting module 23 compares the Seq value with the Seq receiving register value. If the Seq value is equal to the Seq receive register value, discard the VSC data frame; if the Seq value is equal to (Seq receive register value + 1) mod Seq receive register maximum value (Seq receive register length is 16 bits, the value is 65535 Then, the 4-byte VSC identification field is removed from the VSC data frame, the VSC data frame is unpacked into an Ethernet data frame and sent to the Layer 2 protocol stack for processing, and the VSC data transmission is completed.

Referring to FIG. 7, an apparatus for transmitting VSC data of the present invention is provided, which includes a VSC data forwarding device 10 and a plurality of VSC data receiving devices 20, wherein

The VSC data forwarding device 10 is configured to receive an Ethernet data frame; calculate a Seq value of the Ethernet data frame; and embed the Seq value into the Ethernet data frame to form a VSC data frame, and send the VSC data frame to the VSC data receiving device 20 ;

a VSC data receiving device 20, configured to receive a VSC data frame sent by the VSC data forwarding device; parse the VSC data frame; and when determining the extracted Seq value = (Seq receiving register value +1) mod Seq receiving register At the maximum value, the VSC data frame is unpacked into an Ethernet data frame and sent to the Layer 2 protocol stack.

The VSC data receiving apparatus is further configured to: when determining that the extracted Seq value is not equal to (Seq Receive Register Value +1) When the mod Seq receives the register maximum, the VSC data frame is discarded. The structure and working principle of the VSC data forwarding device 10 are the same as those of the VSC data forwarding device 10 of FIG. 3 or FIG. 4, and the structure and working principle of the VSC data receiving device 20 are the same as those of the VSC data receiving device 20 of FIG. 5 or FIG. No longer.

In this embodiment, the conventional TCP/IP protocol is extended to convert an Ethernet data frame into

VSC data frames, through redundant transmission of VSC data frames, reduce the possibility of message retransmission and greatly improve the reliability of Ethernet layer transmission.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent flow transformation made by the specification and the drawings of the present invention may be directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

Claim

A method for transmitting VSC data, the method comprising: receiving, by a transmitting end, an Ethernet data frame, and calculating a Seq value of the Ethernet data frame;

The Seq value is embedded in the Ethernet data frame to form a VSC data frame, and is sent to the receiving end; the receiving end parses the received VSC data frame to obtain a Seq value therein;

When it is determined that the extracted Seq value is equal to (Seq receiving register value +1) mod Seq receiving register maximum value, the VSC data frame is unpacked into an Ethernet data frame, and the unwrapped Ethernet data frame is sent to Layer 2 protocol stack.

2. The method according to claim 1, wherein the calculating the Seq value of the Ethernet data frame is:

The Seq value of the Ethernet data frame is calculated by Seq equals (Seq Transmit Register Value +1) mod Seq Transmit Register Max.

The method according to claim 1 or 2, wherein the embedding the Seq value into the Ethernet data frame to form the VSC data frame comprises:

The VSC data frame format type identification TPID and Seq values are combined into a VSC identification field; the VSC identification field is added to the Ethernet data frame.

The method according to claim 1 or 2, wherein the method further comprises: when it is determined that the extracted Seq value is not equal to (Seq receiving register value +1) mod Seq receiving register maximum value, The VSC data frame is discarded.

5. A VSC data forwarding device, the device comprising:

a receiving module, configured to receive an Ethernet data frame;

The device according to claim 5, wherein the calculation module is configured to pass Seq is equal to (Seq Transmit Register Value +1) mod Seq Transmit Register Max calculates the Seq value of the Ethernet data frame.

The apparatus according to claim 5 or 6, wherein the conversion module comprises: a combining unit, configured to combine the VSC data frame format type identifier TPID and the Seq value into a VSC identification field;

8. A VSC data receiving device, the device comprising:

a sending module, configured to, when determining that the extracted Seq value is equal to (Seq receiving register value +1) mod Seq receiving register maximum value, unpacking the VSC data frame into an Ethernet data frame, and unpacking the Ethernet The network data town is sent to the Layer 2 protocol stack.

The device according to claim 8, wherein the sending module is further configured to: when determining that the extracted Seq value is not equal to (Seq receiving register value +1) mod Seq receiving register maximum value, The VSC data frame is discarded.

A VSC data transmission device, comprising: a VSC data forwarding device and at least one vsc data receiving device, wherein

The VSC data forwarding device is configured to receive an Ethernet data frame; calculate a Seq value of the Ethernet data frame; and embed the Seq value into the Ethernet data frame to form a VSC data frame, and send the signal to the VSC data receiving device ;

The VSC data receiving apparatus is configured to receive a VSC data frame sent by the VSC data forwarding device; parse the VSC data frame; and when determining that the extracted Seq value is equal to (Seq receiving register value +1) mod Seq receiving When the register is at a maximum, the VSC data frame is unpacked into an Ethernet data frame and sent to the Layer 2 protocol stack.

The device according to claim 10, wherein said VSC data receiving device And is further configured to discard the VSC data frame when it is determined that the extracted Seq value is not equal to (Seq receiving register value +1) mod Seq receiving register maximum value.