WO2021159936A1

WO2021159936A1 - Connection structure and device installation method

Info

Publication number: WO2021159936A1
Application number: PCT/CN2021/072913
Authority: WO
Inventors: 王重阳; 刘庆智; 喻径舟; 郭志刚
Original assignee: 华为技术有限公司
Priority date: 2020-02-10
Filing date: 2021-01-20
Publication date: 2021-08-19
Also published as: CN113259781A

Abstract

Disclosed are a connection structure and a device installation method. The connection structure comprises a mainframe and one or more line card boxes. The mainframe comprises a mainframe exchange net plate assembly, the mainframe exchange net plate assembly comprises a mainframe-to-external line card interface, the line card box comprises one or more line card box line cards, and the line card box line card comprises a line card box-to-external exchange interface. The mainframe and the line card box can be connected by means of the mainframe-to-external line card interface and the line card box-to-external exchange interface. By means of the connection structure provided in the embodiments of the present application, the whole machine capacity of the connection structure can be changed by means of changing the number of line card boxes connected to the mainframe, such that when the bandwidth requirement exceeds the whole machine capacity of a router, the number of line card boxes connected to the mainframe can be increased so as to expand the whole machine capacity of the connection structure.

Description

Connection structure and equipment installation method

This application claims the priority of the Chinese patent application filed on February 10, 2020 with the application number 202010085233.1 and the invention title "Equipment Structure". The application number filed on February 21, 2020 is 202010108519.7 and the invention title is " The priority of the Chinese patent application for "equipment structure" and the priority of the Chinese patent application filed on March 10, 2020 with the application number 202010163018.9 and the invention title "connection structure and equipment installation method", the entire contents of which are incorporated by reference In this application.

Technical field

This application relates to the field of communication technology, and in particular to a connection structure and a device installation method.

Background technique

A router generally includes multiple line cards and switching network boards, each line card is provided with a switching interface, and the switching network board is provided with a wired card interface. The switching interface of each line card is connected to the line card interface provided on the switching network board, so that each line card can exchange data through the switching network board. In addition, the line card is generally provided with a network interface for connecting to an external network.

The whole machine capacity is a key indicator of the router, which can be expressed as the product of the maximum number of line cards that can be plugged in the router and the bandwidth of a single line card. For example, if the maximum number of line cards that can be plugged in a router is N, and the bandwidth of a single line card is R, the total capacity of the router is N×R.

During the use of the router, with the growth of the business volume, the demand for bandwidth usage may exceed the overall capacity of the router. Therefore, how to reasonably expand the capacity of the router is a problem worthy of study.

Summary of the invention

The embodiment of the present application provides a connection structure. The connection structure includes a main frame and one or more line card boxes. By increasing the number of line card boxes connected to the main frame, the equipment or network where the connection structure is located can be integrated. Reasonable expansion of machine capacity. The connection structure is as follows:

The embodiment of the present application provides a connection structure. The connection structure includes a main frame and one or more line card boxes, wherein the main frame includes a main frame exchange screen assembly, and the main frame exchange screen assembly includes The main frame used to connect with the line card is the external line card interface. Each line card box includes one or more line card box line cards, and the one or more line card box line cards include a line card box external exchange interface for connecting with a switching network board. The main frame and the one or more line card boxes are connected to the external line card interface of the main frame and the line card box external exchange interface.

Among them, the main frame includes the main frame switching network board assembly. The main frame may also include a main frame backplane, the main frame backplane may be provided with a switching network board slot, one or more of the main frame switching network board components in the main frame switching network board assembly can be inserted into the switching network board slot, The connection between the switching network boards of each main frame can be realized through the backplane of the main frame. The main frame backplane can also undertake the power supply and management communication in the main frame at the same time.

The line card box includes one or more line card box line cards, in which backplane and switching network board may not be provided. Each line card box line card can be set with the external exchange interface of the line card box. When the line card box is connected to the main frame, all line card boxes in the line card box can be connected to the main frame, or part of the line card box line cards are connected to the main frame. Therefore, the connection provided in the embodiment of the present application The expansion granularity of the structure is a line card box line card, and the expansion granularity is small. The line card box can also include an independent power supply and heat dissipation system.

In some embodiments, the device where the connection structure is located is a routing device or a switching device. In some embodiments, the routing device or switching device may be a virtual routing device or a virtual switching device deployed on a physical device, such as a virtual switch vSwitch.

In some embodiments, the connection structure may be located in a data center, and a switch frame is deployed on the Core node of the data center, and multiple line card boxes are connected. The line card boxes are located at the top of rack (TOR) switch position. The card box is connected to a server or a physical terminal device, and a virtual machine can be deployed on the server.

The connection between the main frame and the line card box, that is, the connection between the external line card interface of the main frame and the external exchange interface of the line card box may be realized through a cable or an optical cable. Specifically, it can be selected according to the actual required transmission rate, actual distance, and cost budget. Among them, the cable cost is low, but the rate is slow, and the transmission distance is short; the optical cable is fast, the transmission distance is long, but the cost is high.

The switching network board component of the main frame refers to the switching network board component of the main frame. The main frame switching network board assembly includes one or more main frame switching network boards, and each main frame switching network board may include one or more switching network pieces for exchanging data between different line cards.

Line card box Line card refers to the line card in the line card box. In addition to the external exchange interface of the line card box, the line card box can also include the line card box network interface. The line card box network interface is used to communicate with the network. connect. Line card box The line card can include one or more network processing chips, which are used to perform uplink processing on the datagram received from the network interface of the line card box, and then send it to the external exchange interface of the line card box, or to the slave line card box. The data message received by the foreign exchange interface is processed downstream, and then sent to the network interface of the line card box.

In the solution shown in the embodiment of this application, one main frame can be connected to one or more line card boxes. When the demand for bandwidth is small, the number of line card boxes connected to the main frame can be reduced to reduce the cost of the line card boxes. When the demand for bandwidth is large, the number of line card boxes connected to the main frame can be increased to expand the capacity of the equipment or network where the connection structure is located. Therefore, the device or network where the connection structure provided in the embodiment of the present application is located can expand the capacity of the whole machine reasonably and efficiently.

In addition, by connecting the main frame exchange network board component in the main frame to the line card box line card in the line card box, instead of connecting the main frame exchange network board component to the exchange network board in the line card frame, the exchange network board Then it is connected with the line card box line card, which reduces the switching level, simplifies the connection relationship and saves the switching resources.

In addition, the main frame switching network board assembly can be connected to each line card box line card in the line card box respectively. In this way, the capacity expansion granularity of the device or network where the connection structure is located can be a line card box line card, and the capacity expansion granularity is smaller, so that the capacity expansion is more flexible and the expansion cost is saved.

In a possible implementation, the main frame switching network board assembly includes a plurality of main frame switching network boards, and the multiple main frame switching network boards are of a single-stage switching network structure, and each main frame switching network board Both include the external line card interface of the main frame.

In the solution shown in the embodiment of the present application, the multiple main frame switching network boards included in the main frame switching network board assembly may be a single-level switching network structure, and the level of each main frame switching network board is the same. Then, each main frame switching network board may be provided with an external line card interface of the main frame.

In a possible implementation manner, the main frame switching network board assembly includes a plurality of main frame switching network boards, the multiple main frame switching network boards are a multi-level switching network structure, and the multiple main frame switching network boards The last-stage main frame switching network board in the board includes the external line card interface of the main frame.

Among them, the last-level main frame switching network board may also be referred to as the first-level main frame switching network board.

In the solution shown in the embodiment of the present application, the multiple main frame switching network boards included in the main frame switching network board assembly may be a multi-level switching network structure, for example, a two-level switching network structure. Then you can set the external line card interface of the main frame on the switching network board of each final main frame.

In a possible implementation manner, the main frame further includes one or more main frame line cards, and the one or more main frame line cards are connected to the main frame switching network board assembly.

Among them, the main frame line card is the line card inside the main frame. The connection between the main frame line card and the main frame switch screen assembly may be through the main frame backplane.

In the solution shown in the embodiment of this application, the main frame can also include one or more main frame line cards. In this way, the main frame provided in the embodiment of this application can be used as a router alone, not only as a switch frame. . Moreover, this also allows the user to purchase the main frame separately, instead of having to purchase the matching line card box. When the overall capacity of the main frame does not meet the bandwidth requirements, you can purchase a line card box to expand the overall capacity of the main frame.

In a possible implementation manner, the main frame switching network board assembly further includes a main frame external switching interface for connecting with the switching network board.

According to the solution shown in the embodiment of the present application, the router is mostly a line card frame structure, that is, includes a line card, a backplane, and a switching network board, and the line card and the switching network board are connected through the backplane. An extension method of the router is to connect the external exchange interface of the switching network board inside the router to the external exchange interface of other switching network boards to complete the expansion of the router.

Therefore, by setting the main frame external exchange interface for connecting with the switching network board on the main frame switching network board assembly, the existing router (or called the line card frame) can also be connected to the main frame provided in the embodiment of the application. Frame connection, thus, compatible with the expansion of existing routers, avoiding unnecessary waste of routers when upgrading.

In addition, through the above design, the main frame can also be connected to other main frames, that is, the main frame external exchange interface of one main frame is connected to the external exchange interface of the other main frame, thereby increasing the main frame switching network in the router The number of boards increases the capacity expansion of the router.

In a possible implementation manner, the router further includes a line card frame, the line card frame includes a line card frame switching network board assembly and one or more line card frame line cards, the one or more line cards The frame line card is connected to the line card frame switching network board assembly, and the line card frame switching network board assembly includes a line card frame external exchange interface for connecting with the switching network board. The main frame and the line card frame are connected to the external exchange interface of the line card frame through the external exchange interface of the main frame.

Wherein, the line card frame can have the same structure as the line card frame in the prior art.

In the solution shown in the embodiment of the present application, the connection structure may also be equipped with a cable card frame. The line card frame includes a line card frame switching network board assembly and one or more line card frame line cards, and may also include a line card frame backplane. The connection between the line card of the line card frame and the switch board of the line card frame can be realized through the backplane of the line card frame. The line card frame switching network board assembly may include one line card frame switching network board, or may include multiple line card frame switching network boards. When multiple line card frame switching network boards are included, the multiple line card frame switching network boards may have a single-level network structure or a multi-level switch network board structure.

In a possible implementation manner, the connection structure further includes a crossover device, and the crossover device is respectively connected to the external line card interface of the main frame and the external switch interface of the line card box.

The crossover device may include a crossover module and multiple crossover interfaces. The multiple crossover interfaces are arranged on the crossover module, and the crossover module is used to establish a logical direct connection relationship or a physical direct connection relationship between the crossover interfaces. The so-called logical direct connection relationship or physical direct connection relationship means that if the first cross interface and the third cross interface establish a logical direct connection relationship or a physical direct connection relationship, all data received by the first cross interface can be passed through the cross module All data are sent to the third cross interface, and all data received by the third cross interface can also be sent to the first cross interface through the cross module. The difference between crossover and exchange is that the exchange needs to parse the data and select the outgoing interface according to the destination address contained in the data, while the crossover does not need to parse the data.

In the solution shown in the embodiment of this application, a part of the cross interface of the cross device is connected to the external line card interface of the main frame of the main frame, and the other part of the cross interface is connected to the external exchange interface of the line card box of the line card board box. The logical direct connection relationship or the physical direct connection relationship between the line card interface and the external exchange interface of the line card box.

By setting the crossover device, the crossover device can complete the rate matching when the data transmission rate of the external exchange interface of the line card box and the external line card interface of the main frame do not match. Moreover, the existence of the crossover device also makes the wiring more concise.

In a possible implementation manner, the crossover device is used to match the data transmission rate of the external line card interface of the main frame and the external exchange interface of the line card box.

In a possible implementation manner, the crossover device is a crossbar switch matrix or a configurable optical switch or passive optical cable or passive cable or crossover optical cable or a wavelength division device.

Among them, the crossbar switch matrix can also be called a CrossBar chip.

Passive cables, passive optical cables, and crossover cables can realize physical direct connections between crossover interfaces. The CrossBar chip and configurable optical switch can realize the logic direct connection between the cross interfaces.

In a possible implementation manner, the interface type of one or two of the external line card interface and the line card box external exchange interface of the main frame does not match the cross type of the cross device. When the connection structure is located in a router or a switch, it also includes a photoelectric conversion device. The two ends of the photoelectric conversion device are respectively connected to the crossover device and one of the one or two interfaces.

Among them, the interface types include electrical and optical interfaces, and the crossover types include electrical and optical crossovers. The photoelectric conversion device is used for photoelectric conversion of data.

In the solution shown in the embodiment of this application, when the interface type of one or two of the external line card interface and the line card box external exchange interface of the main frame does not match the crossover type of the crossover device, the router must also have a photoelectric conversion device. Perform photoelectric conversion on the data so that the data can be transmitted normally. The number of photoelectric conversion devices is the same as the number of interfaces that do not match the crossover type of the crossover device.

There are six situations where the interface type of one or two of the main frame's external line card interface and the external switch interface of the line card box does not match the cross type of the cross device:

In the first type, the external line card interface of the main frame is an electrical interface, the external switching interface of the line card box is an optical interface, and the crossover device is an optical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external line card interface of the main frame and the crossover device.

In the second type, the external line card interface of the main frame is an electrical interface, the external exchange interface of the line card box is an optical interface, and the crossover device is an electrical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external exchange interface of the line card box and the crossover device.

In the third type, the external line card interface of the main frame is an optical interface, the external exchange interface of the line card box is an electrical interface, and the crossover device is an electrical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external line card interface of the main frame and the crossover device.

In the fourth type, the external line card interface of the main frame is an optical interface, the external switching interface of the line card box is an electrical interface, and the crossover device is an optical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external exchange interface of the line card box and the crossover device.

Fifth, the external line card interface of the main frame and the external exchange interface of the line card box are both electrical interfaces, and the crossover device is an optical crossover. In this case, a photoelectric conversion device is connected between the external exchange interface of the line card box and the crossover device, and a photoelectric conversion device is also connected between the external line card interface and the crossover device of the main frame.

Sixth, the external line card interface of the main frame and the external exchange interface of the line card box are both optical interfaces, and the crossover device is an electrical crossover. In this case, a photoelectric conversion device is connected between the external exchange interface of the line card box and the crossover device, and a photoelectric conversion device is also connected between the external line card interface and the crossover device of the main frame.

It should be noted that the photoelectric conversion device may be independent of the cross device or integrated in the cross device, which is not limited in this application.

In a possible implementation manner, the crossover device is independent of the main frame and the line card box.

In the solution shown in the embodiment of this application, the crossover device can be used as a component independent of the main frame and the line card box. In this way, multiple line card boxes can share one crossover device, thereby reducing the number of crossover devices. Moreover, when any one of the main frame, the line card box and the cross device is damaged, only the damaged component can be replaced, which saves costs.

In a possible implementation manner, the crossover device is fixed in the line card box.

In the solution shown in the embodiment of this application, the cross device can also be fixed in the online card box. Specifically, there can be two fixing methods:

In the first type, the line card box backplane is set in the line card box, and the cross device and the line card box line card are inserted into the backplane together. The cross device and the line card box line card are connected through the line card box backplane. Line to achieve. In this case, the external exchange interface of the line card box of the line card box is arranged on the side of the backplane. In this fixing mode, when the cross device is damaged, the damaged cross device can be replaced and reinserted on the back panel of the online card box.

The second type is that the cross device is directly fixed to the line card of the line card box, and can be directly made into an integral structure with the line card of the line card box.

In a possible implementation manner, the cross device is fixed in the main frame.

In the solution shown in the embodiment of the present application, the crossover device can also be fixed in the main frame, so that multiple line card boxes can share one crossover device. In addition, fixing the crossover device in the main frame also reduces the number of components included in the router and improves the user experience.

In a possible implementation manner, the external switching interface of the line card box is a switching and network multiplexing interface.

Among them, the switching and network multiplexing interface can be used as a network interface or an interface used as a switching interface.

In the solution shown in the embodiment of the present application, all external interfaces on the line card box line card can no longer be distinguished in terms of physical form whether they are switching interfaces or network interfaces, and they are all switching and network multiplexing interfaces.

If the switching and network multiplexing interface is connected to the external line card interface of the main frame, the role of the switching and network multiplexing interface is switched to the switching interface. At this time, the function of the interface is to transfer the upstream traffic from the line card box to the line card interface. Send to the main frame switching network board for switching, or send the downstream traffic from the main frame switching network board to the line card box line card. If the switching and network multiplexing interface is connected to the network, the role of the interface is switched to the network interface. At this time, the function of the interface is to transmit the data of the network into the router, or send the data of the router from the interface to the network. It should be noted that the above process of switching roles can be automatically detected and completed automatically, or it can be completed through control plane configuration.

By setting the external switch interface of the line card box as a switch and network multiplexing interface, the deployment connection is more flexible, and it is no longer necessary to distinguish which is a switch interface and which is a network interface, and plug and play is realized. Moreover, in the case of limited interface resources, the proportion between the switching interface and the network interface can be flexibly configured to better adapt to different scenarios.

The beneficial effects brought about by the technical solutions provided by the embodiments of the present application include at least:

The application discloses a connection structure. The connection includes a main frame and one or more line card boxes. The main frame includes the main frame switching network board assembly, the main frame switching network board assembly includes the main frame external line card interface, the line card box includes one or more line card box line cards, the line card box line card includes the line card box External exchange interface. The main frame and the line card box can be connected to the external line card interface of the main frame and the external exchange interface of the line card box. The connection provided by the embodiment of the present application can change the total capacity of the device where the connection structure is located by changing the number of line card boxes connected to the main frame, so that when the bandwidth requirement exceeds the total capacity of the device, Increase the number of line card boxes connected to the main frame to expand the overall capacity of the router.

Description of the drawings

Fig. 1 is a schematic diagram of a router provided by an embodiment of the present application;

Fig. 2 is a schematic diagram of a router provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a router provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a router provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a router provided by an embodiment of the present application;

Fig. 6 is a schematic diagram of a router provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of a router provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of a router provided by an embodiment of the present application;

Fig. 9 is a schematic diagram of a crossover optical cable provided by an embodiment of the present application.

illustration

1. Main frame, 11, main frame exchange network board components, 111, main frame external line card interface, 112, main frame external exchange interface, 12, main frame line card, 121, main frame network interface, 13, main frame back plate;

2. Line card box, 21, line card box line card, 22, line card box backplane, 211, line card box external exchange interface, 212, line card box network interface;

3. Line card frame, 31, line card frame, line card, 32, line card frame exchange network board components, 321, line card frame external exchange interface, 33, line card frame backplane;

4. Cross device.

Detailed ways

The embodiment of the present application provides a connecting device, which includes a main frame and one or more line card boxes. The user can use the connection device provided in the embodiment of the present application, and can increase or decrease the overall capacity of the connection device by itself as the service volume changes. Specifically, when the business volume is small, the number of line card boxes connected to the main frame can be reduced to reduce the cost of additional line card boxes; and when the business volume is large, the number of line card boxes connected to the main frame can be increased. Therefore, the overall capacity of the connected equipment is expanded so that the overall capacity of the connected equipment meets the bandwidth demand.

The embodiment of the application provides a connection device, taking a router as an example, but the connection device of the embodiment of the application can also be used in various switching devices and data center networks. As shown in Figure 1-8, the router includes a main frame 1 and one or more line card boxes 2. The main frame 1 includes a main frame switching network board assembly 11, and the main frame switching network board assembly 11 includes a line card The main frame connected to the external line card interface 111. Each line card box 2 includes one or more line card box line cards 21, and the line card box line card 21 includes a line card box external exchange interface 211 for connecting with a switching network board. The main frame 1 and one or more line card boxes 2 are connected through the main frame external line card interface 111 and the line card box external exchange interface 211.

Among them, the main frame 1 includes a main frame switching network board assembly 11. The main frame 1 may also include a main frame backplane 13, and the main frame backplane 13 may be provided with a switching network board slot. One or more main frame switching network boards in the main frame switching network board assembly 11 can be inserted in the switching network In the board slot, the connection between the exchange panels of each main frame can be realized through the main frame backplane 13. The main frame backplane 13 can also undertake the power supply and management communication in the main frame 1 at the same time.

The line card box 2 includes one or more line card box line cards 21, wherein a backplane and a switching network board may not be provided. Each line card box line card 21 can be provided with a cable card box external exchange interface 211. When the line card box 2 is connected to the main frame 1, all the line card boxes and line cards 21 in the line card box 2 can be connected to the main frame 1, or part of the line card box line cards 21 are connected to the main frame 1. Therefore, The router's capacity expansion granularity provided by the embodiment of the application is one line card box line card 21, and the capacity expansion granularity is relatively small. The line card box 2 may also include an independent power supply and heat dissipation system.

The connection between the main frame 1 and the line card box 2, that is, the connection between the main frame's external line card interface 111 and the line card box external exchange interface 211 may be realized through a cable or an optical cable. Specifically, it can be selected based on the actually required transmission rate, actual distance, and cost budget. Among them, the cable cost is low, but the rate is slow, and the transmission distance is short; the optical cable is fast, the transmission distance is long, but the cost is high.

The main frame switching screen assembly 11 refers to the switching screen assembly in the main frame. The main frame switching net board assembly 11 includes one or more main frame switching net boards, and each main frame switching net board may include one or more switching net pieces for exchanging data between different line cards.

Line card box The line card 21 refers to the line card in the line card box. In addition to the line card box external exchange interface 211, the line card box line card 21 may also include the line card box network interface 212. The line card box line card 21 may include one or more network processing chips, which are used to perform uplink processing on the data message received from the line card box network interface 212, and then send it to the line card box external exchange interface 211, or to the external exchange interface 211 of the line card box. The data message received from the external exchange interface 211 of the line card box is processed downstream, and then sent to the network interface 212 of the line card box.

In the solution shown in the embodiment of the present application, one main frame 1 can be connected to one or more line card boxes 2. When the demand for bandwidth is small, the number of line card boxes 2 connected to the main frame 1 can be reduced to reduce the cost of the line card boxes 2. When the demand for bandwidth is large, the number of line card boxes 2 connected to the main frame 1 can be increased to expand the overall capacity of the router. Therefore, the router provided in the embodiment of the present application can expand the capacity of the entire machine reasonably and efficiently.

In addition, by connecting the main frame exchange screen assembly 11 in the main frame 1 to the line card box line card 21 in the line card box 2, instead of connecting the main frame exchange screen assembly 11 to the external exchange screen board, the external The switching network board is connected to the line card box line card 21, which reduces the switching level, simplifies the connection relationship, and saves switching resources.

In addition, the main frame switching network board assembly 11 can be connected to each line card box line card 21 in the line card box 2 respectively. In this way, the capacity expansion granularity of the router can be one line card box line card 21, and the capacity expansion granularity is smaller, so that the capacity expansion is more flexible and the expansion cost is saved.

It should be noted that the working principle of the router provided in the embodiment of the present application may be as follows:

The message enters the router from the line card box line card 21 of the line card box 2, performs upstream processing on the line card box line card 21, and obtains the downstream line card number and the outgoing interface number through route search;

Send the message to the main frame switching network board of main frame 1, and the main frame switching network board performs switching according to the downstream line card number;

The main frame switching network board sends the message to the line card box line card 21 corresponding to the downstream line card number through the direct connection channel;

The line card box line card 21 performs downstream processing on the message, and then sends it out from the outgoing interface.

In a possible implementation manner, the external switching interface 211 of the line card box is a switching and network multiplexing interface.

In the solution shown in the embodiment of the present application, all external interfaces on the line card box line card 21 can no longer be distinguished in physical form as switching interfaces or network interfaces, and they are all switching and network multiplexing interfaces.

If the switching and network multiplexing interface is connected to the external line card interface 111 of the main frame, the role of the switching and network multiplexing interface is switched to the switching interface. At this time, the role of the interface is to transfer the upstream traffic from the line card box to the line card interface. 21 is sent to the main frame switching network board for switching, or downstream traffic is sent from the main frame switching network board to the line card box line card 21. If the switching and network multiplexing interface is connected to the network, the role of the interface is switched to the network interface. At this time, the function of the interface is to transmit the data of the network into the router, or send the data of the router from the interface to the network. It should be noted that the above process of switching roles can be automatically detected and completed automatically, or it can be completed through control plane configuration.

By setting the external switching interface 211 of the line card box as a switching and network multiplexing interface, the deployment connection is more flexible, and it is no longer necessary to distinguish which is a switching interface and which is a network interface, and plug-and-play is realized. Moreover, in the case of limited interface resources, the proportion between the switching interface and the network interface can be flexibly configured to better adapt to different scenarios.

In another possible implementation manner, the line card box external exchange interface 211 may be an interface only used to connect the main frame switching network board. In this case, the line card box line card 21 also includes the line card box network Interface 212.

In a possible implementation manner, the main frame switching network board assembly 11 includes multiple main frame switching network boards, and the multiple main frame switching network boards have a single-stage switching network structure, and each main frame switching network board includes a main frame switching network board. The frame is an external line card interface 111.

In the solution shown in the embodiment of the present application, as shown in FIGS. 1 and 3-8, the multiple main frame switching network boards have a single-level switching network structure, and the level of each main frame switching network board is the same. Then, the external line card interface 111 of the main frame may be provided on the switching network board of each main frame.

In another possible implementation manner, the main frame switching network board component 11 includes multiple main frame switching network boards, the multiple main frame switching network boards are a multi-level switching network structure, and the last of the multiple main frame switching network boards The switching network board of the primary main frame includes the external line card interface 111 of the main frame.

In the solution shown in the embodiment of the present application, the multiple main frame switching networks may also be a multi-level switching network structure, as shown in FIG. 2, it may be a two-level switching network structure. Then you can set the external line card interface of the main frame on the switching network board of each final main frame.

In a possible implementation manner, the main frame 1 further includes one or more main frame line cards 12, and the one or more main frame line cards 12 are connected to the main frame switching network board assembly 11.

Among them, the main frame line card 12 is the line card inside the main frame. The connection between the main frame line card 12 and the main frame switching screen assembly 11 may be through the main frame backplane 13.

In the solution shown in the embodiment of the present application, as shown in FIG. 3, the main frame 1 may also include one or more main frame line cards 12. In this way, the main frame 1 provided by the embodiment of the present application can be used as a router alone. , Not only can be used as an exchange box. Moreover, this also allows the user to purchase the main frame 1 separately, instead of having to purchase the matching line card box 2. When the overall capacity of the main frame 1 does not meet the bandwidth requirements, you can purchase a line card box 2 to expand the overall capacity of the main frame 1.

In a possible implementation manner, the main frame switching network board assembly 11 further includes a main frame external switching interface 112 for connecting with the switching network board.

In the solution shown in the embodiments of the present application, the existing routers are all line card frame structures, that is, include line cards, backplanes, and switching network boards, and the line cards and the switching network boards are connected through the backplane. The existing router expansion method is to connect the external switching interface of the switching network board inside the router to the external switching interface of other switching network boards, thereby completing the expansion of the router. Therefore, in order to be compatible with the expansion of existing routers, the main frame switching network board component 11 in the main frame 1 provided in the embodiment of the present application may further include the main frame external switching interface 112 for connecting with the switching network board.

In this way, as shown in FIG. 4, the main frame external line card interface 111 of the main frame exchange network board assembly 11 in the main frame 1 can be connected to the line card box external exchange interface 211 of the line card box line card 21 in the line card box 2. At the same time, the external switching interface 112 of the main frame can be connected to the switching network board in the line card frame 3.

In addition, through the above design, the main frame 1 can also be connected to another main frame 1. That is, the main frame external exchange interface 112 of one main frame 1 is connected to the main frame external exchange interface 112 of another main frame 1, thereby adding a router The number of switching network boards in the main frame increases the capacity expansion of the router.

In a possible implementation manner, the router further includes a line card frame 3, the line card frame 3 includes one or more line card frame line cards 31 and a line card frame exchange network board assembly 32, and the line card frame exchange network board assembly 32 It includes the external exchange interface 321 of the line card frame for connecting with the switching network board. The main frame 1 and the line card frame 3 are connected through the main frame external exchange interface 112 and the line card frame external exchange interface 321.

Wherein, the line card frame 3 can have the same structure as the line card frame in the prior art.

In the solution shown in the embodiment of this application, the router may also include a line card frame 3. As shown in FIG. The card frame backplane 33, the multiple line card frame line cards 31 and the line card frame exchange screen assembly 32 can be connected through the line card frame backplane 33. The line card frame switching network board assembly 32 may include one line card frame switching network board, or may include multiple line card frame switching network boards. When the line card frame switching network board assembly 32 includes multiple line card frame switching network boards, the multiple line card frame switching network boards may be a single-level switching network structure or a multi-level switching network structure.

In a possible implementation manner, the router further includes a crossover device 4, and the crossover device 4 is respectively connected to the external line card interface 111 and the line card box external exchange interface 211 of the main frame.

The crossover device 4 may include a crossover module and multiple crossover interfaces. The multiple crossover interfaces are arranged on the crossover module. The crossover module is used to establish a logical direct connection relationship or a physical direct connection relationship between the crossover interfaces. The so-called logical direct connection relationship or physical direct connection relationship means that if a logical direct connection relationship is established between the first cross interface and the third cross interface, all data received by the first cross interface can be all sent to the third cross interface through the cross module. Cross interface, and all data received by the third cross interface can also be sent to the first cross interface through the cross module. The difference between crossover and exchange is that the exchange needs to parse the data and select the outgoing interface according to the destination address contained in the data, while the crossover does not need to parse the data.

The implementation of the cross module can be a crossbar switch matrix (CrossBar chip), a configurable optical switch, a passively connected optical cable, a passively connected cable or a crossover optical cable, etc. Passive cables, passive optical cables, and crossover cables can realize physical direct connections between crossover interfaces. The CrossBar chip and configurable optical switch can realize the logical direct connection between the cross interfaces.

In the solution shown in the embodiment of the present application, as shown in FIG. 5, a part of the cross interface of the cross device 4 is connected to the main frame of the main frame 1 to the external line card interface 111, and the other part of the cross interface is connected to the line card box of the line card board box 2. The external exchange interface 211 is connected to establish a logical direct connection between the external line card interface 111 of the main frame and the external exchange interface 211 of the line card box.

By setting the crossover device 4, the crossover device 4 can complete the rate matching when the data transmission rate of the external exchange interface 211 of the line card box and the external line card interface 111 of the main frame do not match. Moreover, the existence of the crossover device 4 also makes the wiring more concise.

In a possible implementation manner, the interface type of one or two of the external line card interface 111 and the line card box external exchange interface 211 of the main frame does not match the cross type of the cross device 4. The router also includes a photoelectric conversion device, and both ends of the photoelectric conversion device are respectively connected to the crossover device and one of the one or two interfaces.

In the solution shown in the embodiment of this application, when the interface type of one or two of the external line card interface 111 and the line card box external exchange interface 211 of the main frame does not match the crossover type of the crossover device 4, the router must also have optical The conversion device performs photoelectric conversion on the data so that the data can be transmitted normally. The number of photoelectric conversion devices is the same as the number of interfaces that do not match the crossover type of the crossover device 4.

There can be the following six situations where the interface type of one or two of the external line card interface 111 and the line card box external exchange interface 211 of the main frame does not match the cross type of the cross device 4:

In the first type, the external line card interface 111 of the main frame is an electrical interface, the external exchange interface 211 of the line card box is an optical interface, and the crossover device 4 is an optical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external line card interface 111 of the main frame and the crossover device 4.

In the second type, the external line card interface 111 of the main frame is an electrical interface, the external exchange interface 211 of the line card box is an optical interface, and the crossover device 4 is an electrical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external exchange interface 211 of the line card box and the crossover device 4.

In the third type, the external line card interface 111 of the main frame is an optical interface, the external exchange interface 211 of the line card box is an electrical interface, and the crossover device 4 is an electrical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external line card interface 111 of the main frame and the crossover device 4.

In the fourth type, the external line card interface 111 of the main frame is an optical interface, the external exchange interface 211 of the line card box is an electrical interface, and the crossover device 4 is an optical crossover. In this case, the two ends of the photoelectric conversion device are respectively connected to the external exchange interface 211 of the line card box and the crossover device 4.

In the fifth type, the external line card interface 111 of the main frame and the external exchange interface 211 of the line card box are both electrical interfaces, and the crossover device 4 is an optical crossover. In this case, a photoelectric conversion device is connected between the external exchange interface 211 of the line card box and the crossover device 4, and a photoelectric conversion device is also connected between the external line card interface 111 and the crossover device 4 of the main frame.

In the sixth type, the external line card interface 111 of the main frame and the external exchange interface 211 of the line card box are both optical interfaces, and the crossover device 4 is an electrical crossover. In this case, a photoelectric conversion device is connected between the external exchange interface 211 of the line card box and the crossover device 4, and a photoelectric conversion device is also connected between the external line card interface 111 and the crossover device 4 of the main frame.

In a possible implementation, the crossover device 4 is independent of the main frame 1 and the line card box 2.

In the solution shown in the embodiment of the present application, as shown in FIG. 6, the cross device 4 is a device independent of the main frame 1 and the line card box 2. In this way, multiple line card boxes 2 can share one cross device 4, and when any one of the main frame 1, the line card box 2 and the cross device 4 is damaged, only the damaged component can be replaced, which saves costs.

In another possible implementation manner, the cross device 4 is fixed in the line card box 2.

In the solution shown in the embodiment of the present application, as shown in FIG. 7 and FIG. 8, the cross device 4 can also be fixed in the online card box 2. Specifically, the cross device 4 has at least the following two fixing methods:

The first type, as shown in FIG. 7, the line card box 2 further includes a line card box back plate 22, and the crossover device 4 and the line card box line card 21 can be integrated on the line card box back plate 22. In this case, the line card box external exchange interface 211 of the line card box line card 21 can be provided on the backplane side, and the connection with the crossover device 4 is realized through the line card box backplane 22. In this fixing mode, when the cross device 4 is damaged, the damaged cross device 4 can be replaced and reinserted on the back plate 22 of the online cassette.

In the second type, as shown in FIG. 8, the crossover device 4 can also be directly fixed to the line card box line card 21, and can be directly made into a structure with the line card box line card.

In another possible implementation manner, the cross device 4 is fixed in the main frame 1.

In the solution shown in the embodiment of this application, the crossover device may also be fixed in the main frame 1. In this way, multiple line card boxes 2 can share one crossover device 4.

The embodiment of the present application also provides a device installation method. The method includes: connecting the main frame 1 with the line card through the main frame external line card interface 111; through the main frame external line card interface 111 and the line card box external exchange interface 211 connects the main frame 1 and one or more line card boxes 2.

In some embodiments, the main frame external line card interface 111 is located in the main frame switching network board assembly 11, the main frame switching network board assembly 11 includes a plurality of main frame switching network boards, and the multiple main frame switching network boards The board is a single-level switching network structure, and each main frame switching network board includes the main frame external line card interface 111.

In some embodiments, the main frame external line card interface 111 is located in the main frame switching network board assembly 11, the main frame switching network board assembly 11 includes a plurality of main frame switching network boards, and the multiple main frame switching network boards The board is a multi-level switching network structure, and the last-stage main frame switching network board of the multiple main frame switching network boards includes the main frame external line card interface 111

In some embodiments, the main frame 1 further includes one or more main frame line cards 12, and the one or more main frame line cards 12 are connected to the main frame switching network board assembly 11.

In some embodiments, the main frame switching network board assembly 11 further includes a main frame external switching interface 211 for connecting with the switching network board.

In some embodiments, the main frame 1 and the line card frame 3 are connected through the main frame external exchange interface 211 and the line card frame external exchange interface 321.

In some embodiments, the main frame is connected to the external line card interface 111 and the line card box external exchange interface 211 through a crossover device.

In some embodiments, the interface type of one or two of the external line card interface 111 and the line card box external exchange interface 211 of the main frame does not match the cross type of the cross device 4, wherein the interface Types include electrical and optical interfaces, and crossover types include electrical and optical crossovers;

A photoelectric conversion device is provided between the crossover device 4 and each of the one or two interfaces.

In some embodiments, the cross device 4 is independent of the main frame 1 and the line card box 2, or the cross device 4 is fixed in the line card box 2, or the cross device 4 is fixed in The main frame 1.

In some embodiments, the crossover device 4 is a crossbar switch matrix or a configurable optical switch or a passive optical cable or a passive cable or a crossover optical cable or a wavelength division device.

In some embodiments, the external switching interface 211 of the line card box is a switching and network multiplexing interface.

In some embodiments, the method is applied in routing equipment or switching equipment or data center.

The above are only examples of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of protection of this application. Inside.

Claims

A connection structure, characterized in that it comprises a main frame (1) and one or more line card boxes (2), wherein:

The main frame (1) includes a main frame switching network board assembly (11), and the main frame switching network board assembly (11) includes a main frame external line card interface (111) for connecting with a line card;

Each line card box (2) includes one or more line card box line cards (21), and the one or more line card box line cards (21) include a line card box connected to a switching network board for external exchange Interface (211);

The main frame (1) and the one or more line card boxes (2) are connected to the external line card interface (111) of the main frame and the line card box external exchange interface (211).
The connection structure according to claim 1, wherein the main frame switching network board assembly (11) comprises a plurality of main frame switching network boards, and the multiple main frame switching network boards are of a single-level switching network structure, Each main frame switching network board includes the main frame external line card interface (111).
The connection structure according to claim 1, wherein the main frame switching network board assembly (11) comprises a plurality of main frame switching network boards, and the multiple main frame switching network boards are a multi-level switching network structure, The last-stage main frame switching network board of the plurality of main frame switching network boards includes the main frame external line card interface (111).
The connection structure according to any one of claims 1-3, wherein the main frame (1) further comprises one or more main frame line cards (12), and the one or more main frame line cards (12) Connect with the main frame exchange screen assembly (11).
The connection structure according to any one of claims 1-4, wherein the main frame switching network board assembly (11) further comprises a main frame external switching interface (112) for connecting with the switching network board.
The connection structure according to claim 5, further comprising a line card frame (3), the line card frame (3) includes a line card frame exchange screen assembly (32) and one or more line card frames Line card (31), the one or more line card frame line cards (31) are connected to the line card frame exchange screen assembly (32), and the line card frame exchange screen assembly (32) includes The external exchange interface (321) of the line card frame connected with the switching network board;

The main frame (1) and the line card frame (3) are connected through the main frame external exchange interface (112) and the line card frame external exchange interface (321).
The connection structure according to any one of claims 1-6, further comprising a crossover device (4), the crossover device (4) is connected to the main frame external line card interface (111) and the The line card box is connected to the external exchange interface (211).
The connection structure according to claim 7, characterized in that the crossover device (4) is used to match the data transmission of the external line card interface (111) of the main frame and the external exchange interface (211) of the line card box rate.
The connection structure according to any one of claims 7-8, characterized in that the main frame is connected to one or two of the external line card interface (111) and the line card box external exchange interface (211). The interface type does not match the cross type of the cross device (4), where the interface type includes an electrical interface and an optical interface, and the cross type includes an electrical cross and an optical cross;

The connection structure further includes a photoelectric conversion device, and both ends of the photoelectric conversion device are respectively connected to the crossover device (4) and one of the one or two interfaces.
The connection structure according to any one of claims 7-9, wherein:

The cross device (4) is independent of the main frame (1) and the line card box (2), or

The cross device (4) is fixed in the line card box (2), or

The cross device (4) is fixed in the main frame (1).
The connection structure according to any one of claims 7-10, wherein the crossover device (4) is a crossbar switch matrix or a configurable optical switch or a passive optical cable or a passive cable or a crossover optical cable or a wavelength division equipment.
The connection structure according to any one of claims 1-11, wherein the external exchange interface (211) of the line card box is a switching and network multiplexing interface.
The connection structure according to any one of claims 1-12, wherein the connection structure is located in a routing device or a switching device or a data center.
A device installation method, characterized in that it comprises:

Connect the main frame (1) with the line card through the external line card interface (111) of the main frame;

The main frame (1) and one or more line card boxes (2) are connected through the main frame external line card interface (111) and line card box external exchange interface (211).
The method according to claim 14, characterized in that the external line card interface (111) of the main frame is located in the main frame switching network board assembly (11), and the main frame switching network board assembly (11) comprises a plurality of main frame switching network board components (11). A frame switching network board, the multiple main frame switching network boards have a single-stage switching network structure, and each main frame switching network board includes the main frame external line card interface (111).
The method according to claim 14, characterized in that the external line card interface (111) of the main frame is located in the main frame switching network board assembly (11), and the main frame switching network board assembly (11) comprises a plurality of main frame switching network board components (11). Frame switching network board, the multiple main frame switching network boards are a multi-level switching network structure, and the last main frame switching network board of the multiple main frame switching network boards includes the main frame external line card interface ( 111).
The method according to any one of claims 14-16, wherein the main frame (1) further comprises one or more main frame line cards (12), and the one or more main frame line cards ( 12) Connect with the main frame exchange screen assembly (11).
The method according to any one of claims 14-17, wherein the main frame switching network board assembly (11) further comprises a main frame external switching interface (112) for connecting with the switching network board.
The method according to any one of claims 14-18, wherein the main frame (1) and the line card frame (3) pass through the main frame external exchange interface (112) and the line card frame externally. The exchange interface (321) is connected.
The method according to any one of claims 14-19, wherein the main frame is connected to the external line card interface (111) and the line card box external exchange interface (211) through a crossover device.
The method according to claim 20, characterized in that the interface type of one or two of the external line card interface (111) and the line card box external exchange interface (211) of the main frame is the same as that of the crossover interface. The crossover type of the device (4) does not match, where the interface type includes electrical interface and optical interface, and the crossover type includes electrical crossover and optical crossover;

A photoelectric conversion device is arranged between the crossover device (4) and each of the one or two interfaces.
The method according to claim 20 or 21, wherein:

The cross device (4) is independent of the main frame (1) and the line card box (2), or

The cross device (4) is fixed in the line card box (2), or

The cross device (4) is fixed in the main frame (1).
The method according to any one of claims 20-22, wherein the crossover device (4) is a crossbar switch matrix or a configurable optical switch or a passive optical cable or a passive cable or a crossover optical cable or a wavelength division device .
The method according to any one of claims 14-23, wherein the external exchange interface (211) of the line card box is a switching and network multiplexing interface.
The method according to any one of claims 14-24, wherein the method is applied to a routing device or a switching device or a data center.