KR100603600B1 - Apparatus and Method for Automatic route setting for Control Path Structure in Router Processor - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a switching device and method for configuring a control path of a router processor.

2. The technical problem to be solved by the invention

The present invention provides a plurality of control paths between processors in a router system, enables the processor to communicate with other processors through one Ethernet channel and address, and automatically eliminates loops on the control path. This reduces the load on the processor, simplifies the control path configuration and fault response methods, improves the reliability and availability of the router system, and facilitates the design and implementation of the router processor's control path for system expansion. To provide a switching device and method for the same.

3. Summary of Solution to Invention

The present invention is mounted on an L2 (L2) motherboard, the switching device for the control path configuration of the router processor, comprising: power monitoring means for monitoring the power of the L2 (L2) motherboard; Processing means for managing the L2 main board; L2 (L2) including an edge L2 (L2) switch for connecting at least one of the L2 (L2) main board and a core L2 (L2) switch for connecting the edge L2 (L2) switch Switching means; And an output signal of the power monitoring means, an output signal of the processing means, an operation state input of a relative L2 (L2) motherboard, a slot identifier of the L2 (L2) motherboard, and the L2 (L2). (L2) switch control means for receiving the link state of the Ethernet connected to the switching means to store the information, and to inform the status of its own operation.

4. Important uses of the invention

The invention is used in communication systems and the like.

Router, Control Path, Ethernet, Core Switch, Edge Switch, Control Logic

Description

Switching device and method for configuring control path of router processor {Apparatus and Method for Automatic route setting for Control Path Structure in Router Processor}             

1 is a block diagram of an embodiment of a switching device for configuring a control path of a router processor according to the present invention;

FIG. 2 is a diagram for explaining a control path configuration of a router using an L2 switch controller according to the embodiment of FIG. 1; FIG.

3 is a diagram illustrating an embodiment of a control register of an L2 switch control unit according to the present invention;

4 is a diagram illustrating another embodiment of a switching device for configuring a control path of a router processor according to the present invention;

5 is a flowchart illustrating a switching method for configuring a control path of a router processor according to the present invention.

* Explanation of symbols for the main parts of the drawings

100: backplane 110, 150: L2 (L2) motherboard

111 processor 112 power monitoring unit

120: L2 (L2) switch module 121: L2 (L2) switch power supply

122: analog switch 123: L2 (L2) switch

130: L2 (L2) switch control unit 131: control register unit

170: counter L2 (L2) switch control unit

The present invention relates to a switching device and method for configuring a control path of a router processor for connecting a connection between processors in a router system to a plurality of radial Ethernets (hereinafter, referred to as "control paths"). For example, in a router system, a plurality of control paths can be formed between processors, and a loop of paths can be controlled to allow a processor to communicate with another processor with one Ethernet address. Switching to configure the control path of the router processor to reduce the complexity of the router design and increase the complexity of the router design and increase the ease of expansion and implementation, resulting in automatic removal with control logic. An apparatus and a method thereof are provided.

A router is a device that connects separate networks using the same transport protocol. The router connects network layers with each other, determines nodes in another network or its own network according to a routing table, and determines the most efficient route among the various routes. By sending packets selectively, the router performs flow control, configures multiple subnetworks within the internetwork, and performs various network management functions.

Conventional technologies used in a router to configure a processor-to-processor connection of a router include a method of using a PCI (PCI) communication method and a method of using a shared memory. However, the above methods have limitations in the expansion of a connection configuration and may be duplicated. Difficulty in pluralization had a problem of poor ability to cope with failure.

On the other hand, in the method of configuring the router's processor-to-processor connection, the Ethernet-based processor connection enables radial point-to-point connection through the Ethernet switch and improves the ease of router system design and expansion with rich technology, know-how, and related components. Can be.

Conventionally, in the Ethernet-based processor connection configuration, a technique used for redundancy or pluralization is to configure a connection between processors in multiple paths so that loop switching on a path may be performed by a Spanning Tree algorithm (STP) or RSTP (RSTP). There is a way to use the Rapid Spanning Tree algorithm, but this is necessary because the processor must access all Ethernet switches, perform the relevant protocols, and because one processor has one or more Ethernet channels and must communicate with different Ethernet addresses, Many functions are required for multi-channel management, and the switching time due to loop generation can be lengthened depending on the stability of the related protocol, which adds complexity in stability and implementation.

Therefore, there is a need for a method for improving the design and implementation of the control path connection in the router system, reducing the complexity in considering the fault response ability, and reducing the cost and time in the expansion.

The present invention has been proposed to solve the above problems, and configures a plurality of control paths between processors in a router system, enables a processor to communicate with another processor through one Ethernet channel and address, and a control path ( Automatic elimination of loops on the control path reduces processor load, simplifies control path configuration and fault response, increasing reliability and availability of router systems, and ease of design and implementation in system expansion. It is an object of the present invention to provide a switching device and a method for configuring a control path of a router processor that can increase the speed.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The apparatus of the present invention for achieving the above object is mounted on an L2 (L2) motherboard, the switching device for the control path configuration of the router processor, the power supply of the L2 (L2) motherboard is monitored Power monitoring means for; Processing means for managing the L2 main board; L2 (L2) including an edge L2 (L2) switch for connecting at least one of the L2 (L2) main board and a core L2 (L2) switch for connecting the edge L2 (L2) switch Switching means; And an output signal of the power monitoring means, an output signal of the processing means, an operation state input of a relative L2 (L2) motherboard, a slot identifier of the L2 (L2) motherboard, and the L2 (L2). (L2) switch control means for receiving the link state of the Ethernet connected to the switching means and stores the information, and informs its operation state.

On the other hand, the method of the present invention, the switching method for the control path configuration of the router processor, the power stabilization step of waiting until the power supply of the L2 (L2) motherboard is stabilized; In the power stabilization step, as the power of the L2 (L2) main board is stabilized, the L2 (L2) determines the functional state of the L2 (L2) main board and the forced stop state of the L2 (L2) switch of the processor. Checking the main board function status; As a result of the checking, after confirming that the L2 (L2) main board is operating normally and there is no command to stop the L2 (L2) switch of the processor, the L2 (L2) switch is operated to see the operating state of its own L2 (L2) switch. L2) an L2 switch operation determining step of determining switch operation; And El 2 (L2) monitoring the power state, the functional state, and the processor forced termination state of the L2 (L2) mainboard as determined by the operation of the own L2 (L2) switch in the L2 (L2) switch operation determining step. L2) monitors the mainboard functional status.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an embodiment of a switching device for configuring a control path of a router processor according to the present invention.

As shown in FIG. 1, a switching device for configuring a control path of a router processor according to the present invention is mounted on an L2 (L2) mainboard 110, and the L2 (L2) mainboard 110. The power monitor 112 for monitoring the power of the L2 (L2) main board 110 to manage the processor 111, the plurality of (L2) at least one of the (110) consisting of the motherboard (110). L2 switch module 120 including the edge L2 (L2) switch for connecting and the core L2 (L2) switch for connecting the edge L2 (L2) switch, the power monitoring unit 112 ) Output signal 135, the output signal 132 of the processor 111, the operation state input 134 of the relative L2 (L2) motherboard 110, and the L2 (L2) motherboard ( The slot ID (identifier) 136 of the 110 and the link state input 138 of the Ethernet connected to the L2 (L2) switch module 120 receives the information, and stores the information, El 2 to inform the operation state of itself (L2) It includes a switch controller 130.

The L2 switch control unit 130 outputs the output signal 135 of the power monitoring unit 112, the output signal 132 of the processor 111, and the relative L2 switch control unit 170. The operating state input 134 of the L2, the slot ID 136 of the L2 (L2) motherboard 110, and the Ethernet link state input 138 connected to the L2 (L2) switch control unit 130 receives the EL2 (L2) The operation output signal 137 of the L2 (L2) switch control unit 130 by storing the information in the control register unit 131 of the switch control unit 130 and using the information stored and input as described above. To the L2 (L2) switch module 120 and outputs a signal 133 indicating the operating state of its own L2 (L2) switch control unit 130 to the relative L2 (L2) switch control unit 170. .

The L2 (L2) motherboard 110 receives a different slot ID value 102 for each slot from the backplane 100 of the router system and switches the L2 (L2) switch through the Ethernet connection connector 103 of the backplane 100. The Ethernet signal 141 of the module 120 is sent to each slot of the router system, and the functional state information and the mounting board of the L2 (L2) main board 110 are connected to the alarm signal-related pin 101 of the backplane 100. Announce the information.

The L2 (L2) switch module 120 includes an L2 (L2) switch power supply unit 121 for supplying power to the L2 (L2) switch module 120, and a plurality of L2 (L2) main boards ( It includes an L2 (L2) switch 123 for connecting the 110, and an analog switch 122 for switching and connecting the Ethernet link connected to the L2 (L2) switch 123, The 2 (L2) switch power supply unit 121 and the analog switch 122 receive the L2 (L2) control signal 137 of the L2 (L2) switch control unit 130 and the L2 (L2) switch module 120 Perform power on / off and link switching.

In order to exchange the L2 switch control information 133 and 134 through the backplane 100, an open collector element 142 which is less affected by attenuation and noise of a signal is used. To maintain the pull-down resistor 143 and pull-up resistor 144 is used in the L2 (L2) motherboard (110, 150). In addition, since the slot ID 102 of the backplane 100 is divided into ground and open, the pull-up resistor 145 of the slot ID in order to properly set the slot ID value 136 on the L2 motherboards 110 and 150. ).

FIG. 2 is a diagram illustrating an embodiment of a control path of a router using the L2 switch controller according to the embodiment of FIG. 1.

The switch board of the dual structure of the router serves as the L2 (L2) main boards 210 and 220, and the L2 (L2) switch control unit 211 and 221 to each of the L2 (L2) main boards 210 and 220. Is mounted.

The L2 (L2) main boards 210 and 220 may include core L2 (L2) switches 212 and 222, edge L2 (L2) switches 213 and 223, switch processors 214 and 224, and the like. And board state information units 215 and 225 for informing board state information and data switches 216 and 226 for data packet switches, respectively.

The core L2 (L2) switches 212 and 222 on the L2 (L2) motherboards 210 and 220 connect the processor to the link links 217 and 227 to the edge L2 (L2) switches 213 and 223. Links 218 and 228 connect the switch processors 214 and 224 with the control paths 271 and 272 of the router.

The router's routing processor boards 240, 250 include edge L2 (L2) switches 242, 252 and routing processors 241, 251, and cores through edge L2 (L2) switches 242, 252. L2 (L2) switch (212, 222) and a dual structure control path (Control Path) is formed, and the routing processor (241, 251) and one connecting link (243, 253).

The line card 260 of the router includes a plurality of network processors 261 and 262 and a line card processor 263, and the core El 2 (L2) switch 212 through an edge L2 (L2) switch 264. A control path having a dual structure is formed with the 222, and a connection link 265 is formed with the line card processor 263.

By the operation of the L2 (L2) switch control unit 211, a dual control path is divided into a control path 271 in an operating state and a control path 272 in a ready state. The core el 2 (L2) switches 212 and 222 are also divided into the core el 2 (L2) switch 212 in the operating state and the core el 2 (L2) switch 222 in the ready state.

In order to configure the control path of the switch processor 224 of the L2 motherboard 220 in which the core L2 (L2) switch 222 in the ready state is located on the L2 motherboard 210 in the operating state. An Ethernet link is formed between the edge L2 (L2) switch 213 and the edge L2 (L2) switch 223 of the ready L2 motherboard 220.

3 is a diagram illustrating an embodiment of a control register of an L2 switch control unit according to the present invention.

The L2 (L2) control register includes a status information input / output register 310, a slot ID register 320, a processor command register 330, and an Ethernet link status register 340 of a control path.

The state information input / output register 310 operates the field 311 indicating the state of the L2 (L2) main board function, the field 312 indicating the power state of the L2 (L2) main board, and the operation of the relative L2 (L2) switch. A field 313 indicating whether or not, a field 314 indicating an operation state of its own L2 (L2) switch board, and a field 315 for controlling the operation of its own L2 (L2) switch.

The slot ID register 320 stores a slot ID value read from the backplane.

The processor command register 330 is a register that allows a processor of an L2 (L2) motherboard to issue an L2 (L2) switch related command and includes a processor command field 331.

The Ethernet link status register 340 contains link state information of an Ethernet control path connected to a core L2 switch. Each bit indicates a state of an Ethernet link connected to a specific slot of a router. Display.

4 is a diagram illustrating another embodiment of a switching device for configuring a control path of a router processor according to the present invention. In addition to the Ethernet control path, the mounting board information 414 of the motherboard required for the operation management of the router system is shown. And the function status information 415 are collected.

The router's routing processor board 410 is the level of the alarm signal traversing through the backplane 400 and the alarm aggregation logic 412 that aggregates the routing processor 411 with the sealant information 414 and the function status information 415. The alarm collection logic 412 includes an alarm register 413 that allows the routing processor 411 to read alarm information using the processor interface 416.

Each of the switch boards 420 and 430 and the line card 440 may include the switch processor 421 and 431 and the line card processor 441 and the hardware check logic 422, 432 and 442 indicating the hardware function status and the board mounting and dismounting. It includes ground connection (423, 433, 443) of the seal signal to notify.

5 is a flowchart illustrating a switching method for configuring a control path of a router processor according to the present invention.

First, a process of waiting until the board power is stabilized is performed. When the power is applied to the L2 (L2) main board (501), the power state is read (502) and the power state is determined (503). . As a result of the determination 503, if the power is not normal, the operation of the switch L2 (L2) is stopped until the power is stabilized (504).

As a result of the determination (503), when the power of the L2 (L2) main board is stabilized, the process of determining the functional state of the board and the forced stop state of the L2 (L2) switch of the processor is performed. Read (505) to determine if the function of the board is normal (506) to stop the operation of the switch L2 (L2) until the function of the board is normal (507) when the board function is normal (L2 of the processor L2 (L2) Read the L2 (L2) switch ON / OFF command to check whether the switch operation is allowed (508), and check whether the L2 (L2) switch ON permission command has been issued (509). If it is not a command, the operation of the switch L2 (L2) is stopped (510). If it is an ON command, the process proceeds to the next step (511). Here, the El2 (L2) switch on / off command of the processor usually forces the L2 (L2) switch in operation to be forced off or the El2 (L2) switch on a specific L2 (L2) motherboard. ) Can be used to put the switch in a stopped state by default.

If the L2 (L2) main board is in normal operation and there is no command to stop the L2 (L2) switch of the processor, the process of determining the operation of the own L2 (L2) switch by looking at the operation state of the other L2 (L2) switch. In this process, the process reads the slot ID of the L2 (L2) motherboard (511) and makes a flow that changes the control flow time of the L2 (L2) switch according to the slot ID (512, 513), relative Read the El 2 (L2) switch state of the board (514) and check the operation state of the counter El 2 (L2) switch (515). Stop (516) and proceed to the process of reading the opponent L2 (L2) switch state (514) to continue to monitor the operation, and if the other L2 (L2) switch is in the stopped state, turn off his L2 (L2) switch Operate (517).

When the L2 (L2) switch is in the operating state, the L2 (L2) motherboard monitors the power state, the function state, and the processor forced termination state. The process is performed in the L2 (L2) switch control logic. View the L2 (L2) switch control register group (518), keep the L2 (L2) switch active, or stop the L2 (L2) switch operation, and send it to the counterpart L2 (L2) switch control logic. In operation 519, it is determined whether to perform the function of notifying the interruption.

As a result of the determination (519), if the L2 (L2) switch is kept in the operation state, the process proceeds to the step (518) of viewing the L2 (L2) switch control register group in the L2 (L2) switch control logic. If not, the operation of the switch L2 (L2) is stopped and the counterpart control signal of the control of the switch L2 (L2) is notified 520, and then the process proceeds to the step 502 of reading the power state.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention allows a router to configure processors with a plurality of Ethernets, and to automatically remove Ethernet loops with L2 (L2) switch control logic that enables the processor to communicate with another processor with one Ethernet address. By doing so, it is possible to prevent the processor from increasing the loop load, increase the reliability and availability of the router system, and increase the ease of design and implementation in the system expansion.

Claims (12)

In the switching device mounted on the L2 (L2) motherboard, for the control path configuration of the router processor, Power monitoring means for monitoring power of the L2 main board; Processing means for managing the L2 main board; L2 (L2) including an edge L2 (L2) switch for connecting at least one of the L2 (L2) main board and a core L2 (L2) switch for connecting the edge L2 (L2) switch Switching means; And An output signal of the power monitoring means, an output signal of the processing means, an operation state input of a relative L2 (L2) motherboard, a slot identifier of the L2 (L2) motherboard, and the L2 (L2) L2 switch control means for receiving the link state of the Ethernet connected to the switching means, storing the information, and notifying its operation state Switching device comprising a. The method of claim 1, The L2 switch control means, The output signal of the power monitoring means, the output signal of the processing means, the operation state input of the relative L2 (L2) switch control means, the slot identifier of the L2 (L2) motherboard, and the L2 (L2) Control information storage means for receiving and storing the link state of the Ethernet connected to the switch control means, And the control information storing means includes a status information input / output register, a slot ID register, a processor command register, and an Ethernet link status register of a control path. The method according to claim 1 or 2, The L2 (L2) main board, At least one of which receives a different slot identifier value from the backplane of the router system to each slot, sends an Ethernet signal of the L2 switching means to each slot of the router system through an Ethernet connection connector of the backplane, The switching device, characterized in that the notification of the functional state information and the mounting information of the L2 (L2) main board through the alarm signal related pin of the backplane. The method according to claim 1 or 2, The L2 (L2) switching means, An el 2 (L2) switch power supply for supplying power to the el 2 (L2) switching means, an el 2 (L2) switch for connecting the at least one El 2 (L2) motherboard, and the el 2 ( L2) includes an analog switch that is responsible for switching and connecting the Ethernet link to the switch, The L2 (L2) switch power supply unit and the analog switch receive the L2 (L2) control signal of the L2 (L2) switch control means, the power on / off (ON / OFF) of the L2 (L2) switch And a switching device and a link switching device. The method of claim 2, The L2 switch control means, A signal for outputting its own operation output signal to the L2 switching means by using the information input and stored in the control information storage means, and informing the relative L2 switch control means of its own operation state. Switching device, characterized in that for outputting. The method of claim 3, wherein The L2 (L2) main board, An open collector device which is less susceptible to signal attenuation and noise to exchange information of the L2 switch control means through the backplane, and includes pull-down resistors and pull-ups to maintain basic values. And a resistor, and comprising a pull-up resistor of the slot identifier to correctly set the slot identifier value by dividing the slot identifier of the backplane into ground and open. In the switching method for the control path configuration of the router processor, A power stabilization step of waiting for the power of the L2 (L2) main board to be stabilized; In the power stabilization step, as the power of the L2 (L2) main board is stabilized, the L2 (L2) determines the functional state of the L2 (L2) main board and the forced stop state of the L2 (L2) switch of the processor. Checking the main board function status; As a result of the checking, after confirming that the L2 (L2) main board is operating normally and there is no command to stop the L2 (L2) switch of the processor, the L2 (L2) switch is operated to see the operating state of its own L2 (L2) switch. L2) an L2 switch operation determining step of determining switch operation; And L2 (L2) monitors the power state, the functional state, and the processor forced termination state of the L2 (L2) mainboard as determined by its own L2 (L2) switch operation in the L2 (L2) switch operation determining step. Main board functional status monitoring stage Switching method comprising a. The method of claim 7, wherein The power stabilization step, The switching method, characterized in that as the power is applied to the L2 (L2) main board reads the power state to determine the power state, the operation of the L2 (L2) switch until the power is stabilized. The method of claim 8, The L2 (L2) main board functional state check step, Reads the functional state of the L2 (L2) main board to determine whether the function of the L2 (L2) main board is normal and the L2 (L2) switch until the function of the L2 (L2) main board is normal. Stops the operation of L2 and reads the L2 (L2) switch ON / OFF command to check whether the L2 (L2) switch ON permission command is enabled. (L2) A switch method, characterized in that to stop the operation of the switch, and if the ON command to proceed to the step of determining the L2 (L2) switch operation. The method of claim 9, The L2 (L2) switch on / off (ON / OFF) command, Switching method, which is used to forcibly stop the L2 (L2) switch in operation or to keep the operation of the L2 (L2) switch on the specific L2 (L2) motherboard in a basically stopped state. The method of claim 9, The step of determining the operation of the L2 switch (L2), After reading the slot identifier of the L2 (L2) motherboard and creating a flow that changes the control flow time of the L2 (L2) switch according to the slot identifier, L2 (L2) of the other L2 (L2) motherboard Reading the switch state and checking the operating state of the counterpart L2 switch (L2); And As a result of the confirmation in the step of checking the relative L2 switch operation state, if the relative L2 switch is in operation, the L2 switch is stopped and the operation of the L2 switch is performed. Operation of the L2 switch, which continuously monitors whether the other L2 switch is in a stopped state and operates the own L2 switch. Switching method comprising a. The method of claim 9, The L2 (L2) mainboard functional state monitoring step, View the L2 (L2) switch control register group in the L2 (L2) switch control logic, and keep the L2 (L2) switch active or abort the L2 (L2) switch operation and (L2) switch operation change determination step L2 (L2) for determining whether to perform a function of notifying the switch control logic; And As a result of the determination of the L2 switch operation change determination step, if the L2 (L2) switch is kept in the operation state, the operation proceeds to the L2 (L2) switch operation change determination step, and the L2 (L2) To change the switch operation state, stop the operation of the L2 (L2) switch and inform the relative L2 (L2) switch control logic to stop, and then maintain the operation of the L2 (L2) switch proceeding to the power stabilization step. Change steps Switching method comprising a.

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