JP5144589B2 - Command input device, command input system, command input method and command input program - Google Patents

Description

  The present invention relates to a command input technology to devices constituting an IP (Internet Protocol) network.

  With the expansion of communication infrastructure, the number of devices (for example, network devices such as routers) constituting a network is increasing. Setting and cancellation of new services for subscribers are performed by inputting commands to the network device, and diversification of services and increase in subscribers are factors that increase opportunities for inputting commands. In addition, device management related to maintaining the quality of communication infrastructure is performed by inputting commands, and the importance of increasing the efficiency of inputting commands is increasing for smooth network management. Here, there is a service activation as a technique for setting contents related to a service in each network device. In recent years, in this service activation, a technique has been proposed in which a part depending on a service among setting contents is cut out for each module and various services are flexibly handled by replacing the modules (see Non-Patent Document 1).

NTT Technology Journal, “Service Activation Technology that Supports Network Services”, [online], [Search June 24, 2008], Internet, <URL: http://www.ntt.co.jp/journal/0508 /files/jn200508018.pdf>

  However, the technique described in Non-Patent Document 1 employs a method in which the system establishes and enters a Telnet session for each command to the network device. Although this method does not cause a command contention problem (problem in which a plurality of commands interfere with each other) caused by inputting a plurality of commands to the network device at the same time, there is a problem that command input efficiency is not always good. Further, in the technique described in Non-Patent Document 1, since the system randomly selects a network device to which a command is input, the number of commands input between the network devices may be biased. Further, if the system establishes a Telnet session each time a command is input, the system cannot predict the waiting time until the command is actually input to the network device after receiving the input target command. Therefore, when there is no response from the network device after the command is input, there is a problem that the system cannot easily determine whether there is a problem with the network device or whether it takes time to input the command. Accordingly, an object of the present invention is to facilitate the prediction of the maximum waiting time until a command is input while the command input device inputs commands to each network device efficiently and equally.

 In order to solve the above-described problems, the present invention provides a series of commands that a command input device that inputs a command to one or more network devices (routers or the like) installed in a communication network inputs from an external device to the network device. Groups are accepted in their order of entry. The queuing unit of the command input device forms a queue of three stages (three phases) in the queue unit for each input network device of the command group for the input command group. First, the queuing unit stores (1) a queue for each command priority in a first-phase queue for each network device to which a command is input. (2) As the second phase, when the queue commands related to the network devices in the third phase are emptied, a predetermined number (N) of the queues in the first phase is preferentially selected from the queues with higher priority. Shift the command. That is, the queuing unit shifts a predetermined number of commands in the order in which the commands are input, starting with a command having a high priority (for example, an emergency command). As a result, when a command group is input to the network device, a command having a higher priority is input to the network device first. When the queuing unit shifts the command group of the first phase queue, when there are less than N command groups in the first phase queue, all the command groups are shifted.

  Next, the queuing unit of the command input device (3) divides the command shifted from the queue of the second phase into a setting command and a non-setting command as the third phase, and accumulates them in the respective queues. In this way, by dividing the command group into a queue for setting commands and a queue for non-setting commands, when establishing a plurality of sessions on the same network device and entering the command group, the type of command is considered. Easy session control. In the second phase, the queuing unit shifts a predetermined number (N) of command groups after the queue for each network device in the third phase becomes empty. In addition, since the maximum number of commands that can be continuously input is a predetermined number (N), it is easy to predict the maximum waiting time until this command group is input. Further, since the command input device inputs commands at a maximum of N consecutive times without establishing a session each time, the command input can be performed efficiently. In addition, it becomes difficult for the command input device to occupy one session for a long time, and it is difficult to bias the number of command inputs among network devices.

The maximum waiting time of the command input device until the command group is input to the network device can be predicted as follows. In this command input device, for example, when there are two third-phase queues for one network device (one set command queue and one non-set command queue), the network device has N queues. The maximum time until the eye command is input, that is, the maximum waiting time until the (N + 1) th command is input can be predicted as follows. First, the maximum number of commands shifted at a time can be calculated by the following equation (1) when N is the same number in all network devices.
Number of shift commands (Cn) = number of network devices × N ... Equation (1)

Next, since each network device is divided into two queues in the third phase, the maximum number of session connections for processing N commands in each network device is two. That is, the number of session connections (Sn) when processing N shifted commands can be calculated by the following equation (2).
Number of session connections (Sn) = number of network devices × 2 Equation (2)

Here, the processing time (Ct) per command and the connection processing time (St) of one session are known, and the number of session resources (maximum number of set session resources) is connected to this command input device. If the number is less than the number of network devices, the maximum waiting time until the N + 1th command is input can be calculated by the following equation (3).

When the number of session resources (maximum number of session resources) is larger than the number of network devices, it can be calculated by the following equation (4).

  Thereafter, the session control unit of the command input device establishes and disconnects a session with the network device based on an instruction from the session management unit, and inputs the command. That is, the session management unit refers to the session management information indicating whether the session is being established and the session status indicating whether the command is being processed by the session, and sets the command queue or the non-configuration command queue. The command group to the network device in which the session is being established is selected as the command group from the command group stored in the command group. At this time, if there is a command group that can be continuously input to the network device in the command group to the network device that is establishing a session, this command group is preferentially selected and set in this command input device. A session control unit that establishes a new session with the network device within a range not exceeding the maximum value of the total number of sessions with each network device and inputs the selected command group to the network device. To instruct. Also, (2) if there is no command group that can be continuously input to the network, a command group is randomly selected from the command group, and the session control unit is instructed to input the selected command group to the network device. Thereby, the command input device can input a series of command groups to the network device collectively. Also, a command group that can be continuously input, such as a setting command and a non-setting command, is input to the network device in parallel using a plurality of sessions. Therefore, commands can be input efficiently.

  In addition, the command input device of the present invention includes a command group for a network device that is establishing a session in the command group in any of the command group of the setting command queue and the non-setting command queue of the queue unit. If not, the session control unit is instructed to disconnect the session that has finished command processing from the established sessions. Then, a command group is randomly selected from the command group, a new session is established with the network device to which the selected command group is input, and the selected command group is set to the established session. To inject using As a result, the command input device can input a command group by effectively utilizing the limited session resource.

  Further, the command input device of the present invention, when instructing the establishment of a new session with the network device to which the command group is input in order to input the command group of the non-setting system command, The number of sessions established between the network devices does not exceed the maximum value (maximum number of sessions) of the total number of sessions with each network device set in its own command input device, and in the third phase for the network device. Make sure that the number does not exceed the number of queues. In this way, when a non-setting command is input in parallel to a network device using a plurality of sessions, the number of sessions to be used does not exceed the maximum number of sessions, and the queue in the third phase relating to the network device It can be less than a few.

  The command input system of the present invention includes a command input device and a plurality of network devices that accept input of commands from the command input device. In this way, a system including the command input device described above can be realized.

  A command input program according to the present invention causes a command input device, which is a computer, to execute the command input method according to claim 5. Therefore, the command input method according to claim 5 can be executed by a general computer.

  According to the present invention, the command input device can easily predict the maximum waiting time until the command is input while inputting the command to each network device efficiently and equally.

It is the figure which showed notionally the process outline | summary of the command input device of this Embodiment. It is the figure which showed the example of a structure of the command input device of this Embodiment. It is the figure which illustrated the command file which the command input device of FIG. 2 receives. It is the figure which illustrated the session management information of FIG. It is the flowchart which showed the process sequence of the command input apparatus of FIG. 6 is a flowchart showing details of queuing in FIG. 5. It is the figure which showed the example of a process sequence of the command input apparatus of FIG.

Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described.
First, commands handled by the command input device of this embodiment will be described. Commands handled by the command input device are roughly classified into setting commands and non-setting commands. Here, a case where the command input network device is a router will be described as an example, but other network devices may be used.

  The setting command is a command of a Cisco (registered trademark) router, for example, and is a command for changing the setting of the router (network device) itself such as “password” and “ip address” set in the Configuration mode. If a plurality of these setting commands are input simultaneously (or almost simultaneously) to the same router, there is a possibility of mutual interference, so it is necessary to execute them exclusively. That is, it is necessary to execute the next command after the execution of one command is completed in the router. In addition, if the order of this setting command is different from that of other setting commands, the result may differ from the assumed execution result. Therefore, when the command input device inputs setting commands to the router, it is necessary to observe the input order.

  Non-configuration commands are commands that do not change the router itself, such as reference commands such as “show” and “ping”. This non-setting command has no effect even when executed simultaneously with other setting commands.

  Each of the setting command and the non-setting command is also classified according to the priority of the command. Here, for simplicity of explanation, the concept of priority is simplified and classified into two types of commands, emergency commands and normal commands.

  Normal commands are basically entered in the order shown in the command file. However, if a failure occurs in a router in the network, a test command (for example, “ping” or “traceroot”) is given priority over these commands, and the failure location of the router is quickly identified. Must-have. Such a command is called an emergency command, and is given to the router with priority over the normal command. The normal command and emergency command also have a set command and a non-set command type, respectively. If this command is a set command, multiple commands are input to the same router. Then problems arise. Therefore, even when a plurality of emergency commands are input to the same router, the order between the commands must be maintained. Whether each command is a normal command or an emergency command is set in a command file or the like by a network administrator or the like.

  To summarize the above characteristics, the command order to be observed in the command input device is as shown in Table 1. In Table 1, “destination” means a command in which the input order is first, and “after” means a command in which the input order is later. Further, “first” and “after” here include not only a case where there is a clear time difference but also a case where they are almost simultaneous.

For example, as shown in Table 1, when the previous command is an emergency command, the previous command is given priority regardless of whether the subsequent command is an emergency command or a normal command. Further, when the previous command is a normal command, if the subsequent command is a normal command, the previous command is prioritized. However, if the subsequent command is an emergency command, the subsequent command is prioritized. For example, if the previous command is a setting command and a normal command, and the latter command is a setting command and an emergency command, the latter command has priority. Also, when the previous command is a non-setting system normal command and the later command is a non-setting system emergency command, the latter command is given priority.

  Here, an outline of processing of the command input device of the present embodiment will be described with reference to FIG. It is assumed that the maximum value (session resource) of the number of sessions established between the command input device and each router (network device) 20 that is a command input target is determined in advance.

  In the command input device of the present embodiment, the queue unit 122 performs queuing including the following three phases for a series of commands input to the router 20. Then, the command group selected from each queue in the phase 3 is input using a session established with the command destination router 20 or a newly established session.

<Phase 1 (first phase)>
When the command input device receives the command file (command group), the command input device divides this command group for each of the input destination routers 20 (for example, routers 20A, 20B, 20C). The divided command group is divided into an emergency command and a normal command. Then, the emergency command is stored as an emergency command queue, and the normal command is stored as a normal command queue. Such processing is performed for each router 20 to which the command group is input.

<Phase 2 (second phase)>
Next, when there are no queue commands for all routers 20 in phase 3 (details will be described later), the command input device assigns a predetermined number (N of queue commands in the phase 1 to the queue in the phase 2 (buffer queue). Shift). Here, the command to be shifted is preferentially selected from the emergency command queue (the queue having a high priority). When the number of commands in the emergency command queue of phase 1 is less than N, all commands in the emergency command queue are shifted, and the shortage is shifted from the normal command queue. By shifting the phase 1 command group in this way, it is possible to realize queuing in which an emergency command is input earlier than a normal command for commands to the router 20. In addition, since the command input device shifts the next N commands after there are no commands for all the routers 20 in the phase 3, the number of input commands is less likely to be biased among the routers 20. The number of commands shifted by the command input device may be different for each router 20 as a command input destination.

<Phase 3 (third phase)>
The command input device accumulates the setting system command in the setting system command queue and stores the non-configuration system command in one or more non-configuration system command queues among the N commands of Phase 2.

  Thereafter, the session control unit 125 of the command input device shifts the command group accumulated in the setting command queue or the non-configuration command queue as the input command candidate group, and from each of the shifted command groups, 1 command group is selected. Then, this command group is input to the router 20. In this way, the command input device can input commands to the router 20 as continuously as possible. In addition, since it is known that the command input device shifts commands up to N at a time and inputs them to the router 20, it is easy to predict the maximum waiting time for command input. Note that there is one setting system command queue for this phase 3 per router 20. This is because when a session is established with the router 20, a conflict occurs if the setting command of phase 3 is input using a plurality of sessions.

  At this time, the session control unit 125 refers to the session state (session established, session disconnected, command processing, command processing completed) with the router 20, and a command group that can be continuously input (that is, a non-conflicting input command). If there is a candidate group), the command group is preferentially selected. For example, if a session with the router 20 is being established and a setting command is being processed, a non-setting command is selected. In this way, even when a plurality of commands are successively input into the same router 20, it is possible to prevent command conflicts within that router 20.

  At this time, (1) the session control unit 125 has a session resource with the router 20, and the next input command conflicts with the command being input to the target device (router 20) of the input command. If not, a new session is established in the target device (router 20) and a command is input. Here, (2) if all the session resources are connected, the session control unit 125 waits until the command input to any of the routers 20 is terminated and disconnects the session. Then, the process (1) is executed. That is, if there is no session resource for establishing a new session, the session control unit 125 disconnects the session after the command is input, secures the session resource, and allows a new session to be established. In this way, the command input device can establish a plurality of sessions and input commands in parallel to the same router 20. As a result, the command input device can input commands efficiently. In (1), when the session control unit 125 establishes a new session with the router 20, the total number of sessions established by the command input device does not exceed the maximum number of sessions, and the router 20 Do not exceed the number of sessions that can be established (parallelism).

<Configuration>
Next, a configuration example of the command input system according to the present embodiment will be described with reference to FIG. The command input system receives a command file from the host system 30 (30A, 30B, 30C) that outputs a command file indicating a command group to the router (device) 20 and the command system to the router 20 and sends a command to the router 20 A command input device 10 for inputting a group and a router 20 (20A, 20B, 20C) which is a device to which the command group is input are configured. The host system (external device) 30 is realized by a computer that outputs a command file to the command input device 10, for example. The router 20 is a router installed in a communication network such as an IP network. Here, it is assumed that the command input device 10 has already established a session with the router 20 (20A to 20C) by the session control unit 125. The session management information 131 records with which router 20 each session is established, whether the session is being established or disconnected, whether the command processing is completed at the connection destination router 20, and the like. It shall be.

  The configuration of the command input device 10 will be described in detail. The command input device 10 is divided into an input unit 11, a processing unit 12, a storage unit 13, and an output unit 14.

  The input unit 11 receives one or more commands from the host system 30 in a file format. The processing unit 12 controls the entire command input device 10 and mainly performs queuing in the queue unit 122 and session control with the router 20. The storage unit 13 stores session management information 131 that is referred to when this session is selected. The output unit 14 outputs a command to the router 20.

  The input unit 11 and the output unit 14 include an input / output interface and a communication interface for inputting / outputting data to / from an external device (the host system 30 or the router 20). The processing unit 12 is realized by a program execution process by a CPU (Central Processing Unit) included in the command input device 10 or a dedicated circuit. Further, the storage unit 13 includes a storage medium such as a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), and a flash memory. When the command input device 10 is realized by a program execution process, the storage unit 13 stores a command input program for realizing the function of the command input device 10.

  Here, a command file received by the command input device 10 will be described. In FIG. 3, as shown in FIG. 3, the command file includes a router ID (for example, IP (Internet Protocol) address) of the router 20 as a command input destination, a command type, and one or more commands. Two command types are shown here (command types 1 and 2). For example, the command type 1 indicates whether the command is an emergency command or a normal command, and a command indicates whether the command is a setting command or a non-setting command. Type 2 is indicated. For example, in the command file shown in FIG. 3, commands “aaaaaaaaa” and “bbbbbbbbbb” are input to the router 20 with the IP address “10.10.10.11”. ) ”Indicates“ setting system (setting system command) ”. The command shown in this command file is, for example, a CLI (Command Line Interface) command. It is assumed that the command groups shown in this command file are arranged in the order of command input to the router 20.

  The input unit 11 of FIG. 2 outputs the command file to the processing unit 12 when receiving the input of the command file from the host system 30.

  The processing unit 12 includes a queuing unit 121, a queue unit 122, a session management unit 124, and a session control unit 125.

  The queuing unit 121 divides the command group included in the command file input via the input unit 11 for each router 20 to which the command group is input. Then, the command group divided for each router 20 determines the type (emergency command or normal command), accumulates the emergency command as an emergency command queue in the queue unit 122, and stores the normal command in the queue. It accumulates as a normal command queue of the unit 122 (phase 1). Next, when the queues of the phase 3 for all the routers 20 in the queue unit 122 become empty, the queuing unit 121 preferentially selects from the queues with high priority (emergency command queue) among the queues of the phase 1. The command to the router 20 is shifted to a predetermined number (N) of buffer queues (phase 2). Then, among the commands shifted to the buffer queue, setting commands are accumulated in the setting command queue, and non-setting commands are accumulated in the non-setting command queue (phase 3).

  The queue unit 122 divides and accumulates an emergency command queue for commands to the router 20 and a normal command queue (phase 1 queue area), and a buffer queue area for accumulating N commands shifted from the phase 1 queue. (Phase 2 queue area), out of the command group shifted from the Phase 2 queue, a setting command queue area for storing setting commands and a non-setting command queue area for storing non-setting commands (Phase 3 queue areas). The queue unit 122 is formed on a semiconductor memory such as a RAM provided in the command input device 10, for example.

  The session management unit 124 refers to the session state indicated in the session management information 131, and from the command group of the setting system command queue or the non-configuration system command queue of the queue unit 122, commands that are establishing a session with the router 20 A group is selected as a candidate group of input commands to the router 20. Here, in the command group to the router 20 during the session establishment, (1) if there is a command group that can be continuously input to the router 20, this command group is preferentially selected, and the command input device 10 The session control unit 125 is instructed to establish a new session with the router 20 within a range not exceeding the maximum number of sessions. Here, the number of sessions that can be established in the same router 20 does not exceed the maximum number of sessions of the command input device 10 and does not exceed the number of queues in the phase 3 of the queue unit 122 (parallelism). In addition, if there is no command group that can be continuously input to the router 20, the session management unit 124 randomly selects from the command group, and the session control unit 125 selects the selected command group as the command group. To the router 20 that is the destination of Further, if there is no command group for the router 20 in session establishment in any of the command group of the setting system command queue and the non-configuration system command queue of the queue unit 122, the session management unit 124 has already established. The session that has finished command processing is disconnected from the session, and a command group is randomly selected from either the command group of the setting command queue or the non-setting command queue of the queue unit 122. Then, a new session is established with the router 20 that is the destination of the selected command group, and the session control unit 125 is instructed to input the selected command group using the established session.

  In addition, the session management unit 124 receives session state information indicating the state of a session established with the router 20 from the session control unit 125 and records it in the session management information 131. Then, with reference to this session management information 131, the session control unit 125 is instructed to distribute sessions used for command input and to establish and disconnect sessions. The session management unit 124 sets the total number of sessions established with each router 20 to be equal to or less than a preset maximum number of sessions (number of session resources), and the parallelism ( The number of queues in phase 3 related to the router 20) is set to be less than or equal to the number. Details of the session management information 131 recorded by the session management unit 124 will be described later with reference to FIG.

  The session control unit 125 establishes and disconnects a session with the router 20 and inputs a command using the established session based on an instruction from the session management unit 124. Further, when session establishment / disconnection or command input is performed, or when command processing is completed in the input destination router 20 after the command input, the state is output to the session management unit 124 as session state information.

  The storage unit 13 stores session management information 131. The session management information 131 is information indicating the state of a session established with the router 20. FIG. 4 is a diagram illustrating the session management information of FIG. As shown in FIG. 4, the session management information 131 records, for each session ID, the router ID of the router 20 connected by the session, the command type of the input command, the session state, the session connection time, and the like. For example, in the session management information 131 shown in FIG. 4, the session with the session ID “10010011001” is a session established with the router 20 with the router ID “10.10.10.11”. System (setting system command)) "is entered, indicating that the command is" processing (command processing) "and that the session connection time is" 30 (s) ". The session management information 131 further includes information on the total number of sessions established with the router 20 and the maximum number of sessions established by the command input device 10. The session management information 131 is referred to when the session management unit 124 selects a session used for command input.

  The output unit 14 in FIG. 2 inputs the command output from the session control unit 125 to the router 20.

<Processing procedure>
Next, the processing procedure of the command input device 10 will be described with reference to FIGS. 1 and 2 and FIG. Here, it is assumed that the command input device 10 has already established a session equal to or less than the maximum number of sessions with each router 20 and has recorded the state of the established session in the session management information 131.

  First, the input unit 11 of the command input device 10 in FIG. 2 receives an input of a command file from the host system 30 (S11). Then, the input unit 11 outputs this command file to the queuing unit 121. Next, the queuing unit 121 classifies the command group included in the command file for each router 20 that is the input destination of the command group (S12), and outputs it to the queue unit 122 (S13).

  Then, the queuing unit 121 performs queuing in the queue unit 122 (S14). Details of the queuing at this time will be described later with reference to FIG.

  Here, the session management unit 124 refers to the session state with each router 20 indicated in the session management information 131, and the setting system command queue and the non-configuration system command queue in the phase 3 of the queue unit 122 (see FIG. 1). It is determined whether there is a command group for the router 20 in session establishment in any of the command groups (S15).

  Here, when the session management unit 124 determines that there is a command group for the router 20 in session establishment in any of the command group of the setting system command queue and the non-configuration system command queue of the queue unit 122 ( (Yes in S15), the process proceeds to S16. Then, the session management unit 124 determines whether there is a command group that can be continuously input to the router 20 in the command group to the router 20 during the session establishment (S16). That is, the session management unit 124 determines whether there is a command group that competes when continuously input to the router 20 among the command groups to the router 20 during the session establishment. For example, when the router 20 is processing a setting command, if a command group of the setting command is input to the router 20, a conflict occurs. Therefore, such a command group is determined as a command group that cannot be continuously input to the router 20 (No in S16). Then, the process proceeds to S19. S19 will be described later. On the other hand, when a command group of non-setting commands is input to this router 20, since there is no conflict, it is determined that the command group can be continuously input to this router 20 (Yes in S16).

  When the session management unit 124 determines that there is a command group that can be continuously input to the router 20 in the command group to the router 20 during the session establishment (Yes in S16), the command group is selected (S17). ). Here, it is assumed that all command groups stored in the setting command queue or the non-setting command queue are selected. Then, the session management unit 124 uses the session control unit 125 to input the selected input command using a session established with the router 20 that is the input destination of the command group or a newly established session. (S18). In response to this, the session control unit 125 inputs this command group to the router 20 using the instructed session. Thereafter, the session management unit 124 updates the session management information 131 (S25). In S <b> 18, the session management unit 124 determines that the total number of sessions established between the command input device 10 and each router 20 does not exceed the maximum number of sessions and is established in the router 20. The number does not exceed the number of phase 3 queues of the queue unit 122 for the router 20. For example, when the maximum number of sessions of the command input device 10 is “4”, even if a new session is established for this router 20, the total number of sessions established with each router 20 is “4”. Do not exceed. In the phase 3 of the queue unit 121, when there are one queue for the router 20 for each of the setting command queue and the non-setting command queue, the number of sessions established with the router 20 is “2”. Do not exceed.

  On the other hand, in S16, when the session management unit 124 determines that there is no command group that can be continuously input to the router 20 in the command group to the router 20 that is establishing a session (No in S16), the session is being established. The command group is randomly selected from the command group to the router 20 (S19). Then, the session management unit 124 instructs the session control unit 125 to input the selected command group after the command processing in the router 20 to which the command group is input (S20), and then proceeds to S25. .

  In S15 described above, the session management unit 124 determines that there is no command group to the router 20 that is establishing a session in either the setting command queue or the non-setting command queue of the queue unit 122 (S15). No), the following processing is performed. That is, first, the session management unit 124 refers to the session management information 131 and determines whether or not all session resources (maximum number of sessions) permitted for the command input device 10 are being used (S21). Here, if all the session resources are being used (Yes in S21), the session management unit 124 selects the router 20 that has finished command processing from the sessions established with each router 20. The session control unit 125 is instructed to disconnect the current session (S22). In response to this, the session control unit 125 disconnects the session with the router 20 that has finished command processing. Then, the process proceeds to S23.

  On the other hand, the session management unit 124 refers to the session management information 131, and if there is a surplus in the session resource (No in S21), skips S22 and proceeds to S23. That is, if the total number of sessions established with each router 20 does not exceed the maximum number of sessions, the process proceeds to S23.

  In S23, the session management unit 124 randomly selects a command group from the phase 3 queues (setting command queue and non-setting command queue) of the queue unit 122 (S23). Then, a new session is established with the router 20 that is the input destination of the selected command group, and the session control unit 125 is instructed to input the selected input command group using the established session ( S24). In response to this, the session control unit 125 establishes a new session with the router 20 and inputs the selected command group using the established session. Then, the process proceeds to S25.

  In this way, the command input device 10 can input commands to each router 20 as continuously as possible. In addition, if the router 20 can be continuously inserted and there is a margin in session resources, a plurality of routers 20 (one for setting commands and one for non-setting commands are used in the above example). ) Session and submit commands in parallel. Thereby, the command input to the router 20 can be performed efficiently.

  Next, the queuing in S14 of FIG. 5 will be described with reference to FIGS. First, the queuing unit 121 of the command input device 10 in FIG. 2 divides this command group into an emergency command and a normal command for each input destination router 20 and stores them in the respective queues. (S61). That is, as phase 1 (see FIG. 1), the queuing unit 121 accumulates the emergency command in the emergency command queue in the command group and accumulates the normal command in the normal command queue for each router 20.

  When the queues for all the routers 20 in phase 3 (the setting command queue and the non-setting command queue in FIG. 1) become empty (Yes in S62), the queuing unit 121 performs the emergency command queue and the normal command. Shift N commands from the queue to the buffer queue. At this time, if the command is accumulated in the emergency command queue, the queuing unit 121 preferentially shifts from the command in the emergency command queue (S63). When the number of commands stored in the emergency command queue and the normal command queue is less than N, all the commands are shifted. Further, when commands are accumulated in the queue for any router 20 in phase 3 (No in S62), the process does not proceed to S63.

  Next, the queuing unit 121 divides the command group accumulated in the phase 2 buffer queue (see FIG. 1) into a set command and a non-set command, and shifts to each queue (S64). That is, setting commands are accumulated in the setting command queue, and non-setting commands are accumulated in the non-setting command queue.

  By doing in this way, the command input device 10 continuously inputs a maximum of N commands to each router 20, so that it is easy to predict the maximum waiting time for command input.

<Specific example>
Next, a specific example of command input processing by the command input device 10 will be described. FIG. 7 is a diagram showing an example of command input processing by the command input device of FIG.

  Here, an example will be described in which the command input device 10 in FIG. 2 establishes a maximum number of four sessions with the three routers 20 (20A to 20C) and inputs commands to the router 20. Here, the command input device 10 inputs commands A1, A2, A3, A4 to the router 20A, inputs commands B1, B2, B3 to the router 20B, and inputs commands C1, C2, C3 to the router 20C. And Of these, commands A1, A3, B1, B3, C1, and C2 are setting commands, and commands A2, A4, B2, and C3 are non-setting commands. Here, the queuing unit 121 will be described on the assumption that the command group queues at the times t1 to t3 of the routers 20 (routers 20A to 20C) in the phase 3 are in the state shown in FIG.

  First, the command input device 10 receives an input of a command file from the host system 30. Then, the queuing unit 121 classifies the command group included in this command file and stores it in the queue unit 122. Then, the session management unit 124 reads the router ID to which this command is input. When the session management unit 124 refers to the session management information 131 and determines that there is no session established with the destination router 20, the session management unit 124 informs the session control unit 125 with the router 20. To establish a session. Here, since the session with the routers 20A to 20C, which are input destinations of each command, is not established, the session management unit 124 sends the session A with the router 20A for inputting the command A1 to the session control unit 125. Instruction is given to establish session B with the router 20B for inputting the command B1, session C with the router 20C for inputting the command C1, and session D with the router 20A for inputting the command A2. As described above, since the maximum number of sessions is four, the establishment request for the fifth session is not performed.

  The session control unit 125 of the command input device 10 makes such a session establishment request to the routers 20A, 20B, and 20C. When the session control unit 125 receives a session establishment response from the routers 20A, 20B, and 20C, the session control unit 125 uses the established session to send commands A1, B1, and C1 to the routers 20A to 20C. , A2 is input. Note that since the command A2 is a non-setting command, no conflict occurs even when the setting command is input in the router 20A. Therefore, the command input device 10 inputs this command A2 continuously. At this stage, the queue of phase 3 (t1) of queue unit 122 becomes empty, and queuing unit 121 shifts the next N commands (phase 3 (t2)). Thereafter, the routers 20A to 20C notify the command input device 10 of a message to that effect when the command input is completed (or when the setting process by this command is completed).

  Next, the command input device 10 inputs the command C2 of phase 3 (t2) to the router 20C and inputs the command B2 to the router 20B. At this stage, the queue of phase 3 (t2) becomes empty, so the queuing unit 121 shifts the next N commands (phase 3 (t3)). Thereafter, when the command input is completed (or when the setting process by this command is completed), the routers 20C and 20B notify the command input device 10 of a message to that effect. Subsequently, the command input device 10 inputs commands A3 and A4 to the router 20A. When the command input is completed (or when the setting process by this command is completed), the router 20A notifies the command input device 10 of a message to that effect.

  Next, when receiving a completion message from the routers 20B and 20C, the command input device 10 inputs the remaining commands (commands C3 and B3) of phase 3 (t3) to the router 20C and the router 20B. When the command input is completed, the routers 20C and 20B notify the command input device 10 of a message to that effect (or when the setting process by this command is completed).

  In this way, the command input device 10 inputs a maximum of N command groups to each router 20 in succession. Further, if a plurality of sessions can be established for one router 20, the command input device 10 can input commands efficiently by establishing a plurality of sessions and inputting commands. Furthermore, since the maximum number of commands input by the command input device 10 is N, the maximum waiting time until a command group is input can be easily predicted.

  In the above-described embodiment, an operator or the like can set an arbitrary number of phase 3 non-setting system command queues for each router 20 in the queue unit 122 of the command input device 10. For example, the command input device 10 sets the number of non-setting system command queues in phase 3 related to the router 20A to “1” based on the input setting information, and the number of non-setting system command queues in phase 3 related to the router 20B. Is “3”, the command input device 10 inputs a command to the router 20A using a maximum of two sessions and inputs a command to the router 20B using a maximum of four sessions. By doing so, the operator of the command input device 10 can set a large number of maximum sessions (parallelism) that can be established in the router 20B that is predicted to have a large number of input of non-setting commands, for example. More efficient command input can be realized.

DESCRIPTION OF SYMBOLS 10 Command input device 11 Input part 12 Processing part 13 Storage part 14 Output part 20 (20A, 20B, 20C) Router 30 Host system 121 Queuing part 122 Queue part 124 Session management part 125 Session control part 131 Session management information

Claims (6)

A command input device for inputting commands to one or more network devices installed in a communication network,
An input unit that receives a series of commands to be input from the external device to the network device in the input order;
The first-phase queue area for storing the input command group for each network device to which the command group is input (1) by dividing the command group into queues for each priority when the command is input to the network device (2) a second-phase queue area that accumulates a predetermined number of commands shifted from the first-phase queue; and (3) a setting-related command that accumulates setting-related commands among the commands in the second-phase queue. A queue unit comprising a third phase queue area having a queue area and one or more non-setting command queue areas for accumulating non-setting system commands;
The received series of commands is divided into queues for each priority level of commands for the network device and stored in the first phase queue, and the third phase queue for all network devices is stored. Of the first phase, the command to the network device is preferentially shifted from the queue with the higher priority among the queues of the first phase, and the setting-related command among the shifted commands is A queuing unit that accumulates in a setting command queue and accumulates the non-setting command in one or more non-setting command queues;
Session identification information established with the network device, identification information of a network device connected by the session, a session indicating whether the session is being established and whether a command is being processed by the session A storage unit for storing session management information indicating a state;
Update the session management information based on the session status of the network device notified by the session control unit, refer to the session status indicated in the session management information, and set command queue and non-set command of the queue unit A session management unit for selecting a command group to the network device in session establishment from the command group accumulated in the queue;
Establishes and disconnects a session with the network device, and inputs the command group selected by the session management unit using a session established with the network device to which the command group is input And a session control unit for notifying the session management unit of the session state of the network device,
The session management unit refers to the session state indicated in the session management information, and in the command group to the network device during the session establishment,
(1) If there is a command group that can be continuously input to the network device, this command group is preferentially selected and exceeds the maximum value of the total number of sessions with each network device set in the command input device. Establish a new session with the network device,
(2) If there is no command group that can be continuously input to the network device, select random from the command group,
A command input device that instructs the session control unit to input the selected command group. The session management unit
If there is no command group to the network device in session establishment in any command group of the setting command queue and non-setting command queue of the queue unit,
Disconnecting the session that has finished the command processing from the established sessions to the session control unit,
For a command group randomly selected from the command group of the setting command queue or the non-setting command queue of the queue unit, a new session is established with the network device that is the input destination of this command group. The command input device according to claim 1, wherein the command input device is configured to instruct the session control unit to input the selected command group using the established session. The session management unit
In order to input the command group, when instructing the establishment of a new session with the network device to which the command group is input, the total value of the sessions established with the network device is The number of queues for the network device in the third phase does not exceed the maximum value of the total number of sessions with each network device set in the command input device, and does not exceed the queue number for the network device in the third phase. The command input device according to claim 1 or 2.   A command input system comprising: the command input device according to any one of claims 1 to 3; and a plurality of the network devices that receive input of commands from the command input device. Identification information of a session established between one or more network devices installed in a communication network and its command input device, identification information of a network device connected by the session, and whether the session is being established And a storage unit for storing session management information indicating a session state indicating whether or not a command is being processed by the session, and an input command group for each network device to which the command group is input (1 ) A first-phase queue area that accumulates and accumulates in priority queues when commands are input to the network device, and (2) a second phase that accumulates a predetermined number of commands shifted from the first-phase queue. (3) Among the queue commands of the second phase, a setting for storing setting commands. A queue section having a third phase queue area having a system command queue area and one or more non-setting system command queue areas for storing non-setting system commands, and inputting a command to each of the network devices. The command input device is
Receiving a series of commands to be input from an external device to the network device in the order of input;
The received series of commands is divided into queues for each priority level of commands for the network device and stored in the first phase queue, and the third phase queue for all network devices is stored. Of the first phase, the command to the network device is preferentially shifted from the queue with the higher priority among the queues of the first phase, and the setting-related command among the shifted commands is Accumulating in a setting command queue and storing the non-setting command in one or more non-setting command queues;
With reference to the session state indicated in the session management information, a command group to the network device that is establishing a session is selected from the command groups stored in the setting command queue and the non-setting command queue of the queue unit. Steps,
Executing the selected command group using a session established with a network device that is a destination of the command group, and updating session management information of the network device;
In the step of selecting a command group to the network device during the session establishment, the command input device is:
With reference to the session state indicated in the session management information, in the command group to the network device during the session establishment,
(1) If there is a command group that can be continuously input to the network device, this command group is preferentially selected and exceeds the maximum value of the total number of sessions with each network device set in the command input device. Establish a new session with the network device,
(2) A command input method characterized in that if there is no command group that can be continuously input to the network device, random is selected from the command group.   A command input program for causing a command input device, which is a computer, to execute the command input method according to claim 5.

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