JP2009212798A - Network system, control method thereof, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save power when an amount of traffic to be processed is little in a network having redundant configuration. <P>SOLUTION: A management server 200 of an IP network system 100 is provided with: a traffic amount monitoring means 201 for acquiring traffic amounts of a plurality of pieces of network equipment 410, 420 connected in the network by the redundant configuration; a comparison means 202 for comparing the traffic amounts processed by the pieces of network equipment with a prescribed threshold; and a mode selection means 203 for selecting either of a normal mode for operating all the pieces of network equipment or a degeneration mode for stopping a piece of network equipment at a redundant part according to a comparison result by the comparison means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a network system, a control method thereof, and a program, and more particularly to a network system having a plurality of network devices connected in a redundant configuration in a network, and a control method and program in a management server that manages the network system. .

  Conventionally, a network in which a plurality of network devices are connected in a redundant configuration and load distribution of traffic processing is known. In such a network environment, the number of redundant network devices is designed so that the peak traffic volume can be processed. In this case, in a time zone in which the amount of traffic to be processed is small, there is a state in which more than necessary network devices operate even though the traffic processing amount of each device is small. In recent years, awareness of environmental issues has increased, and power consumption of various network devices has been reduced. However, it is necessary to consider power saving when considering the entire network system.

Patent Document 1 describes power saving of a network device (network device) connected to a network. In this patent document, each network device connected to a network can operate by selecting either a normal operation mode or a power saving mode according to the number of accesses. Each network device monitors the connection relationship with other networks, and when there is a change in the network connection, the network configuration after the change is stored in the network information storage means of the own device. Next, based on the changed network connection information, it is determined whether to operate in the power saving mode according to the number of accesses. In this determination, the relationship with other network devices, for example, whether or not the own device is a parent device of another device or whether or not it is a relay node between other devices is considered. .
JP 2000-201166 A

  In the above patent document, each network device connected to the network changes the mode of its own device according to the number of accesses from other devices. At this time, when the own device is a relay node of another network device, the mode change is suppressed in consideration of the influence on the other network device. For this reason, the effect of the power saving obtained by the network device of the above-mentioned patent document is limited.

  In view of the above, the present invention provides a network system capable of realizing power saving in a network system having a plurality of network devices connected in a redundant configuration in accordance with the state of the amount of traffic to be processed by the network device. Objective.

To achieve the above object, the present invention provides a network system having a plurality of network devices connected in a network in a redundant configuration.
Traffic volume monitoring means for intermittently acquiring the traffic volume processed by each of the plurality of network devices;
A comparison means for comparing the amount of traffic processed by the network device with a predetermined threshold;
Mode selection means for selecting either a normal mode in which all of the plurality of network devices are operated or a degenerate mode in which at least one of the plurality of network devices is stopped according to a comparison result by the comparison means. Providing a featured network system.

Also, the present invention provides a network system control method in a management server that manages a network system having a plurality of network devices connected in a network in a redundant configuration.
The management server intermittently acquiring the amount of traffic processed by each of the plurality of network devices;
The management server comparing a traffic amount processed by the network device with a predetermined threshold;
The management server selecting either a normal mode in which all of the plurality of network devices are operated or a degenerate mode in which at least one of the plurality of network devices is stopped according to a comparison result in the comparison step; A network system control method is provided.

Furthermore, the present invention is a program for operating a management server that manages a network system having a plurality of network devices connected in a network in a redundant configuration, the management server including:
A process of intermittently acquiring the amount of traffic processed by each of the plurality of network devices;
A process of comparing the traffic amount of the acquired network device with a predetermined threshold;
According to the comparison result in the comparison step, executing a process of selecting either a normal mode in which all of the plurality of network devices are operated or a degeneration mode in which at least one of the plurality of network devices is stopped. Provide a featured program.

  The network system of the present invention, its control method, and program can process traffic to the limit of the capacity of the network device when operating in the normal mode, and when operating in the degenerate mode, the necessary number of network devices at that time By operating only the network device and stopping other network devices, it is possible to save power in the system.

  Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In addition, in order to make an understanding easy, the same code | symbol is attached | subjected to the same element through all the figures. FIG. 1A is a block diagram showing an IP network system which is a network system according to the first embodiment of the present invention. FIG. 2B is a functional block diagram of the management server that operates with the management program. The IP network system 100 includes a management server 200, a layer 3 switch (L3SW) 400, an L3SW 410, an L3SW 420, a remote power control device 500, a terminal 600, a terminal 601, and one or more servers 700. These are connected in an IP (Internet Protocol) network system 100 as shown in FIG.

  The management server 200 executes a management program 300. The management program 300 has the following three functions: (1) a function for acquiring information of the L3SW 410, L3SW 420, and L3SW 400 by SNMP (Simple Network Management Protocol) communication, and (2) a function for setting the remote power supply control device 500 by SNMP communication. And (3) a function of logging in to the L3SW 420 and executing a command.

  Each of the L3SW 400, L3SW 410, and L3SW 420 has the following six functions: (1) a function of a layer 3 switch or router; (2) a function of responding device information to SNMP communication from the management program 300; (4) a function that enables login from the management server 200, (4) a function that ups (opens) / shuts down (closes) a port by executing a command, (5) a function that shuts down its own device by executing a command, and (6 ) VRRP (Virtual Router Redundancy Protocol) compatible function.

  The management server 200 has a traffic volume monitoring unit 201 that acquires information including the traffic volume processed from the L3SW 410 and L3SW 420 by the management program 300, and a comparison unit 202 that compares the acquired traffic volume with a predetermined threshold value. The normal mode or the degenerate mode is selected according to the comparison result by the comparison unit, and the L3SW 410, the L3SW 420, and the remote power supply control device 500 are controlled according to the selection.

  The remote power supply control device 500 is connected to the power supply of the L3SW 420 that is a control target, and performs power supply control for the L3SW 420. This control has a function of turning on / off the power supply to the device to be controlled by setting from the outside via SNMP communication.

  Terminals 600 and 601 perform IP communication with server 700. The server 700 performs IP communication with the terminal 600 and the terminal 601. For this purpose, terminals 600 and 601 are connected to port 4100 of L3SW 410 and port 4200 of L3SW 420, and port 4101 of L3SW 410 and port 4201 of L3SW 420 are connected to port 4001 and port 4002 of L3SW 400, respectively. The port 4000 of the L3SW 400 is connected to the server 700 and the management server 200.

  In the above configuration, the L3SW 410 and the L3SW 420 are connected in a redundant configuration by VRRP in the network system and perform load distribution. In a state where both L3SWs 410 and 420 are operating normally, communication from the terminal 600 to the server 700 passes through the L3SW 410, and communication from the terminal 601 to the server 700 passes through the L3SW 420. When the L3SW 420 is shut down, communication from the terminal 600 to the server 700 passes through the L3SW 410, and communication from the terminal 601 to the server 700 also passes through the L3SW 410. Such an operation is possible by setting VRRP and each terminal.

The management program 300 stores the data shown in Table 1.

  FIG. 2 is a flowchart showing processing in the IP network system. The processing of the IP network system 100 will be described with reference to FIGS. 1 and 2 and Table 1. The management program 300 installed in the management server 200 has two states, a normal state (normal mode) and a degenerate state (degenerate mode), depending on the current traffic state of the IP network system 100. The normal state indicates a state where all the devices of the IP network system 100 are operating, and the degenerate state indicates a state where processing of some devices is stopped.

In FIG. 2, the management program 300 determines the amount of traffic flowing through the ports designated as the normal monitoring ports in Table 1, that is, the port 4101 of the L3SW 410 and the port 4201 of the L3SW 420 in the normal IP network system 100. Obtained by SNMP communication (step S1). Since there are a plurality of monitoring ports, these values are summed, and the total traffic volume T1 is compared with the normal switching traffic volume (Th ₁ ) shown in Table 1 (step S2). As a result of the comparison, when it is determined that the acquired value is larger than the switching traffic amount (T1> Th ₁ ) (step S3), after sleeping for a certain time (step S4), the process returns to step S1, and steps S1 to S3 repeat.

If the acquired value is equal to or less than the switching traffic amount (T1 ≦ Th ₁ ) in step S3, the processing set for the switching operation in the normal state in Table 1 is performed in order, and the process shifts to the degenerate state (step S5). In the example shown in Table 1, the ports 4200 and 4201 of the L3SW 420 are closed and shutdown is performed, and then the power supply OFF to the L3SW is set to the remote power control device 500 by SNMP communication. In the present embodiment, the state in which this process is completed is referred to as a degenerated state.

In the degenerated IP network system 100, the management program 300 acquires the amount of traffic flowing through the port designated as the degenerated state monitoring port in Table 1, that is, the port 4101 of the L3SW 410, by SNMP communication (step S6). A comparison is made between the acquired traffic volume (T2) and the switched traffic volume in the degenerated state (Th ₂ , where Th ₂ > Th ₁ ) (step S7). As a result of the comparison, if it is determined that the acquired traffic volume T2 value is smaller than the switching traffic volume (Th ₂ ) (step S8), after sleeping for a fixed time (step S9), the process returns to step S6 and steps S6 to S8 are repeated.

In step S8, if the traffic volume T2 obtained was determined to be traffic volume Th ₂ or more switching performs processing set to the switching operation of the degenerate condition shown in Table 1, the process proceeds to the normal state ( Step S10). In the example shown in Table 1, the IP network system 100 returns to the normal state by opening the port of the L3SW 420 and setting the power supply ON to the remote power supply control device 500 by SNMP communication.

  In the first embodiment, when it is detected that the amount of traffic to be processed has decreased, the number of network devices used in the IP network 100 can be reduced by switching the IP network 100 to the degenerate state in real time. The power consumption of the entire IP network system can be suppressed.

  FIG. 3 is a block diagram showing a configuration of an IP network system which is a network system according to the second embodiment of the present invention. The IP network system 100 includes a management server 200, L3SW400, L3SW410, L3SW420,..., L3SW4n0, remote power control device 520,..., Remote power control device 5n0, terminal 601, terminal 602,. And the server 700. These devices are connected by an IP network as shown in FIG. Note that n is an arbitrary integer.

  The management server 200 executes a management program 300. The management program 300 has the following three functions: (1) a function for acquiring information of L3SW 410,..., L3SW 4n0, 400 by SNMP communication, and (2) a remote power control device 520,. A function of setting the remote power supply control device 5n0, and (3) a function of logging in to L3SW420,..., L3SW4n0 and executing a command.

  L3SW400, L3SW410, L3SW420,..., L3SW4n0 are the following six functions: (1) a function of a layer 3 switch or router; (2) a function of responding device information to SNMP communication from a management program; ) A function that enables login from the management server, (4) a function that ups / shuts down a port by executing a command, (5) a function that shuts down its own device by executing a command, and (6) a VRRP function .

  The remote power supply control device 520 is connected to the power supply of the L3SW 420 and performs power supply control to the L3SW 420. The remote power supply control device 5n0 is connected to the power supply of the L3SW4n0 and performs power supply control to the L3SW4n0. Further, the remote power control device 5n0 has a function of turning on / off the power supply to the device to be controlled by a setting by an external SNMP communication.

  Terminal 601, terminal 602,. . . The terminal 60n performs IP communication with the server 700. The server 700 performs IP communication with the terminal 601, the terminal 602, ..., the terminal 60n. L3SW 410, 420,. . , 4n0 ports 4100, 4200,. . . 4n00 are terminals 601, 602,. . . 60n, and L3SW 410, 420,. . , 4n0 ports 4101, 4201,. . . , 4n01 are ports 4001, 4002,. . . , 400n. A port 4000 of the L3SW 400 is connected to the server 700 and the management server 200.

  With the above configuration, L3SW 410, L3SW 420,..., L3SW 4n0 have a redundant configuration based on VRRP and perform load distribution. In a state where all these n devices are operating normally, communication from the terminal 601 to the server 700 is via the L3SW 410, communication from the terminal 602 to the server 700 is via the L3SW 420, and from the terminal 60n to the server 700. Communication via L3SW4n0. When the L3SW 420,..., L3SW4n0 are shut down, communication from the terminal 601 to the server 700 passes through the L3SW 410, and communication from the terminal 60n to the server 700 also passes through the L3SW 410. This operation is enabled by VRRP and terminal settings.

The management program 300 records the data shown in Table 2.

The management program performs the process shown in FIG. In the normal state IP network system 100, the management program 300 is a port designated as a normal state monitoring port in Table 2, that is, the port 4101 of the L3SW 410, the port 4201 of the L3SW 420,. . . The amount of traffic flowing through the port 4n01 of the L3SW 4n0 is acquired by SNMP communication (step S1). Since there are a plurality of monitoring ports, the values are summed, and the total traffic amount T1 is compared with the switching traffic amount in the normal state (Th ₁ = 20 Mbps) shown in Table 2 (step S2). . As a result of the comparison, when it is determined that the acquired value is larger than the switching traffic amount (T1> Th ₁ ) (step S3), after sleeping for a certain time (step S4), the process returns to step S1, and steps S1 to S3 repeat.

If the acquired value is equal to or less than the switching traffic amount (T1 ≦ Th ₁ ) in step S3, the processing set for the switching operation in the normal state in Table 2 is performed in order, and the process shifts to the degenerate state (step S5). In the example shown in Table 2, the L3SW 420 is shut down, and then the power supply OFF is set to the remote power control device 520 by SNMP communication. This process is performed for all of the L3SWs 430 to 4n0 and the remote power supply control devices 530 to 5n0. In the present embodiment, the state in which this process is completed is referred to as a degenerated state.

In the IP network system 100 in the degraded state, the management program 300 acquires the amount of traffic flowing through the port designated as the monitored port in the degraded state in Table 2, that is, the port 4101 of the L3SW 410, by SNMP communication (step S6). A comparison is made between the acquired traffic volume (T2) and the switched traffic volume in the degenerated state (Th ₂ = 30 Mbps) (step S7). As a result of the comparison, if it is determined that the acquired traffic volume T2 value is smaller than the switching traffic volume (Th ₂ ) (step S8), after sleeping for a fixed time (step S9), the process returns to step S6 and steps S6 to S8 are repeated.

In step S8, when it is determined that the acquired traffic amount T2 is switched traffic Th ₂ or more, it performs the processing set in the switching operation of the degenerate condition shown in Table 2, shifts to the normal state ( Step S10). In the example shown in Table 2, the IP network system 100 returns to the normal state by sequentially setting the power supply ON to the remote power control devices 520 to 5n0 by SNMP communication.

In the present embodiment, the same effect as in the first embodiment can be obtained. In the present embodiment, since there are a plurality of redundantly configured devices (n; n> 2), the switching traffic amounts Th ₁ and Th ₂ are set in multiple stages, and one or more L3SWs are stopped or operated, so that detailed Processing can also be performed. In this case, finer control can be performed by selecting the normal mode or selecting any one of a plurality of modes of degeneration in real time on a larger network.

In each of the above embodiments, the amount of packets flowing through the port of a network device that performs traffic load distribution is monitored. When the amount of packets falls below a certain value during monitoring, the number of network devices used is reduced by changing the settings of a plurality of network devices specified in advance and turning off the power. In this state, if the amount of packets being monitored exceeds a certain value, the setting of a plurality of designated network devices is changed and the power is turned on to increase the number of network devices used. In this way, power consumption can be reduced by stopping unnecessary devices while operating necessary devices at that time.

  Although the present invention has been described based on the preferred embodiment, the network system, the control method, and the program of the present invention are not limited to the configuration of the above embodiment, but from the configuration of the above embodiment. Various modifications and changes are also included in the scope of the present invention.

(A) is a block diagram of a network system according to the first embodiment of the present invention, (b) is a functional block diagram of a management server. The flowchart which shows the process of the network system of FIG.1 and FIG.3. The block diagram of the network system which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

100: IP network system 200: Management server 300: Management programs 400, 410, 420,. . . 4n0: L3SW
4000, 4100, 4200,. . . 4n00: Ports 4001, 4002, 4101, 4201,. . . 4n01: ports 500, 520, 530,. . . 5n0: Remote power supply control devices 600, 601,. . . , 60n: terminal 700: server

Claims (8)

In a network system having a plurality of network devices connected in a network in a redundant configuration,
Traffic volume monitoring means for intermittently acquiring the traffic volume processed by each of the plurality of network devices;
A comparison means for comparing the amount of traffic processed by the network device with a predetermined threshold;
Mode selection means for selecting either a normal mode in which all of the plurality of network devices are operated or a degenerate mode in which at least one of the plurality of network devices is stopped according to a comparison result by the comparison means. A featured network system.   The mode selection means selects the degeneration mode when the traffic amount of the plurality of network devices becomes smaller than a first threshold in the normal mode, and is operating among the plurality of network devices in the degeneration mode. The network system according to claim 1, wherein the normal mode is selected when a traffic amount of the network device becomes larger than a second threshold value.   The network system according to claim 1 or 2, wherein in the network device stopped in the degeneration mode, a port connected to the network is closed and power supply is stopped.   The network system according to claim 3, wherein the mode selection unit stops power supply to the network device by remote control.   5. The network system according to claim 1, wherein in the degenerate mode, only one network device is operated among the plurality of network devices.   5. The network system according to claim 1, wherein in the degeneration mode, the number of network devices that stop in a stepwise manner is increased in accordance with the amount of traffic processed by an operating network device. In a network system control method in a management server for managing a network system having a plurality of network devices connected in a network in a redundant configuration,
The management server intermittently acquiring the amount of traffic processed by each of the plurality of network devices;
The management server comparing a traffic amount processed by the network device with a predetermined threshold;
The management server selecting either a normal mode in which all of the plurality of network devices are operated or a degenerate mode in which at least one of the plurality of network devices is stopped according to a comparison result in the comparison step; A method for controlling a network system, comprising: A program for operating a management server for managing a network system having a plurality of network devices connected in a network in a redundant configuration, the management server
A process of intermittently acquiring the amount of traffic processed by each of the plurality of network devices;
A process of comparing the traffic amount of the acquired network device with a predetermined threshold;
According to the comparison result in the comparison step, executing a process of selecting either a normal mode in which all of the plurality of network devices are operated or a degeneration mode in which at least one of the plurality of network devices is stopped. A featured program.

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