JP6306972B2 - Screen display device - Google Patents

Description

  The present invention relates to a technique for displaying a network status on a screen.

  In recent years, network virtualization technology that can flexibly cope with sudden and irregular network changes accompanying future service diversification and can effectively use network resources has been studied. Network virtualization technology consists of virtual resources that represent a part of physical resources (physical nodes and physical links) that make up a network as logical nodes (logical nodes) and logical links (logical links). It is a technology that can be realized as a virtual network, or realized as a single virtual network by combining physical resources of networks provided by a plurality of network operators. By using this network virtualization technology, it becomes possible to share physical resources between virtual networks in accordance with changes in the environment such as the use state of physical resources and failures. In addition, if the allocation of physical resources to each virtual network can be determined optimally, it is possible to reduce the amount of resources and improve network availability.

  The virtual network visualization method is described in Non-Patent Document 1. Non-Patent Document 1 (particularly, refer to FIG. 5 of Non-Patent Document 1) displays both virtual networks and physical networks, correspondence between physical nodes and logical nodes, and accommodation between physical links and logical links. Is indicated by a line or a number.

  Various methods for visualizing a physical network are disclosed in Non-Patent Document 2. For example, when displaying the network configuration of a network of a telecommunications carrier in which various devices such as a transfer device and a control device are used, as shown in FIG. Is used to draw a device (for example, lower service devices 101, 102, 103, transfer devices 121, 122, control device 141, upper service device 161 shown in FIG. Patent Document 2). This method has an advantage that it is easy to recognize the position of the device and the geographical range covered by the device.

  Other methods for displaying the network configuration include, as shown in FIG. 2, only the logical connection relationship (logical topology) between devices (indicated by squares in FIG. 2) without considering any geographical information. There is a display method based on it. Furthermore, as a derivative form thereof, there is a method of arranging those having the same function and role in the same hierarchy as shown in FIG. 3 (Non-Patent Document 2). In FIG. 3, the hierarchical relationship of the hierarchy is the number of devices passing from the end device, with the layer (the portion surrounded by the broken line) of the device (lower service devices 101, 102, 103) located at the end of the network being the lowest. Define based on (hop count). In addition, a device group having the same function and role is defined as a “floor”. The method of FIG. 3 has an advantage that the role of the apparatus and the logical configuration of the network can be easily recognized.

  In the screen display method shown in FIGS. 1 to 3, in addition to the entire network display, it is possible to cut out and display only a part of the network. As a method of extraction, for example, a method of cutting out only the configuration around a part of the device, a method of cutting out only the configuration of a device in a part of the region, a method of cutting out only a group of devices having a specific function and a floor, and a specific service There is a method to cut out only the floor.

  For example, FIG. 4B shows an example of cutting out only a device group having a specific control system function and a floor (service plane) related to the service. FIG. 4B shows a case where only the control device 141 having the control system function and the service devices (lower service devices 101, 102, 103, and higher service device 161) are cut out from the configuration of FIG. 4A and displayed. ing. Transfer devices 121 and 122 and transfer links are physically interposed between the control device 141 and the lower service devices 101, 102, and 103 and the upper service device 161. Therefore, in this display method, in order to clarify the connection status between control system devices, the physical connection status such as transfer devices and transfer links interposed between the control system devices is abstracted to control link 151 (FIG. 4). (B) is displayed as a broken line). This has the advantage of making it easier to recognize the operating status of control system functions between devices.

  Further, as an example of cutting out only the floor related to a specific service, FIG. 5B shows a case where only the floor to which the device (service plane) to which the user connects belongs is cut out and displayed when the users communicate with each other. Show. FIG. 5B shows a case where only the upper service device 161 and the lower service devices 101, 102, and 103 are cut out and displayed from the configuration of FIG. A transfer device and a transfer link are interposed between the higher-level service device 161 and the lower-level service devices 101, 102, and 103, and control system devices belonging to the control plane operate in cooperation to realize a service. Therefore, in this display method, the operation status of these devices and links is abstracted and displayed as a service link 152 (broken line in FIG. 5B). This has the advantage of making it easier to recognize the service provision status between devices.

  The above-described display screens shown in FIGS. 1 to 5 are two-dimensional displays. However, Non-Patent Document 2 also discloses a three-dimensional display and a display screen in consideration of a time axis.

  FIG. 6 shows a three-dimensional display screen using a space axis (three dimensions of X, Y, and Z axes). The map is superimposed on the XY plane in the three dimensions, and the device is arranged at the corresponding point on the map superimposed on the XY plane using geographical information such as the latitude and longitude of the place where the device is arranged in the real world. . Furthermore, the Z-axis (height) is used to represent the floor. Devices of the same level (same attributes) are arranged on a certain XY plane, and devices of different levels are arranged at different heights. For these arranged devices, devices in connection relation are connected by a line (link) based on actual network connection information. Further, the places where the devices above the terminal floor are present (for example, the lower service device 102, the transfer device 122, and the upper service device 161) surround these devices as an important building 155 in a cube. By doing in this way, a viewer becomes easy to visually recognize the floor of each apparatus. Further, for a device that forms an active / standby system (hereinafter also referred to as a cluster) with a plurality of devices, the group is clearly shown on the screen by surrounding these device groups with lines. For example, in FIG. 6, devices in the same group are surrounded by an ellipse 154. This makes it easier for the viewer to recognize on the screen the device group that forms the active / standby system. Therefore, it becomes easier for the viewer to guess on the screen the influence level of the service when a failure occurs in a certain device.

In this three-dimensional screen display method, the position and orientation of the viewpoints (first viewpoint and second viewpoint in FIG. 7) are freely set, and the network status focusing on the status of an arbitrary device and link is confirmed. be able to. That is, the viewpoint corresponds to a camera.
For example, FIG. 8A is an example of a display screen viewed from the first viewpoint of FIG. 7, and shows a plan view in which the device and the link are projected on the XY plane. FIG. 8B is an example of a display screen viewed from the second viewpoint of FIG. 7 and shows an elevation view in which the device and the link are projected on the YZ plane.

Further, Non-Patent Document 2 discloses a screen display that continuously displays a change in the status of a network failure from a certain past time selected by a screen viewer to the present.
For example, when a failure first occurs in the transfer device 121 of the network (FIG. 9A) and then a failure occurs in the transfer device 122 (FIG. 9B), the viewer displays the failure on the display screen. The network status from a past time to the next time selected by the time axis bar 159 or the like can be shown. This makes it easier for viewers to check in sequence on the display screen which device in the network is the cause of the failure and the location where the alarm was first issued, and the status of the alarm or failure. .

Igor M. Moraes, et al., "FITS: A Flexible Virtual Network Testbed Architecture", Computer Networks, Vol.63, pp.221-237, (2014) Naoki Tateishi and three others, “Examination of information visualization method for large-scale network”, IEICE technical report, IEICE Vol. 112, 492 (ICM2012 59-80), pp.89- 94, (March 2013)

The screen display method related to the physical network disclosed in Non-Patent Document 2 displays network information and alarms that consist of multiple levels in a unified manner, making it easy for viewers to understand the point of failure, the cause, and the level. Can be. However, Non-Patent Document 2 does not disclose a method for visualizing a large-scale carrier network including a virtual network configuration.
Also, Non-Patent Document 1 does not disclose a display method for improving the visibility of a virtual network configuration or failure information in a large-scale carrier network.

  Therefore, an object of the present invention is to provide a screen display device that improves the configuration of a virtual network and the visibility of failure information in a large-scale carrier network.

In order to solve the above-described problem, a screen display device of the present invention is a screen display device that generates a display screen that displays at least a virtual network and a physical network device and a link between the devices. Input from the input device and the storage unit storing the coordinate information of the device, the connection information between the devices, the storage relationship information between the devices of the physical network and the devices of the virtual network, and the time An operation unit that acquires information, and the virtual network corresponding to time information acquired as the input information by the operation unit with reference to coordinate information of the device of the physical network, the connection information, and the accommodation relation information A coordinate calculation unit for determining display coordinates of the slices of the virtual network and devices and links of the virtual network and the physical network, and a slice of the virtual network based on the display coordinates determined by the coordinate calculation unit Wherein a virtual network and display information generation unit for generating a three-dimensional display screen data the device and the link of the physical network for each time, the storage unit further by display purposes, devices of the virtual network And filter information for selecting a device and link of the physical network and the link, and the display information generating unit uses the filter information selected and input by the input device as the input information via the operation unit. Gets Te, based on the filter information, and extracting the device and the link to be displayed, characterized by a generation child dimensional display screen data.

  According to such a configuration, the screen display device displays the virtual network and physical network devices and links corresponding to the time to be displayed, and the accommodation relationship between the virtual network and the physical network, three-dimensionally for each time. be able to. Therefore, the screen display device can improve the visibility of the configuration of the virtual network in a large-scale carrier network.

Moreover, according to such a structure, the screen display apparatus can extract the apparatus and link suitable for the browsing objective of a browsing person based on the filter information according to the display objective. Therefore, the screen display device can improve the visibility of the configuration of the virtual network in a large-scale carrier network.

  The screen display device generates three-dimensional display screen data for displaying a device group composed of the plurality of devices selected by the filter information as one aggregation device and a display of information related to the state of the aggregation device. And a summary screen generation unit for generating three-dimensional display screen data for displaying the link between the aggregation devices as one link.

  The filter information is set so as to select the device and the link used by the user for each user, and the display information generation unit displays the selected device and the link as the user. It is displayed on the slice of the physical network and the virtual network for the user, or only on the slice of the virtual network for the user.

  The filter information is set so as to select the device and the link of the physical network related to the slice of the virtual network to be displayed, and does not display the device and the link of the physical network that are not selected. It is characterized by.

  According to such a configuration, the screen display device displays a group of devices including a plurality of devices as one aggregation device using the filter information, and displays a link between the aggregation devices as a single link. Therefore, the number of devices to be displayed and the number of links can be reduced. Further, the screen display device can display for each user according to the user using the filter information. In addition, the screen display device can hide devices and links in the physical network that are not related to the virtual network slice to be displayed. Therefore, the screen display device can improve the configuration of the virtual network and the visibility of failure information in a large-scale carrier network.

  The screen display device acquires information on a device in which a failure has occurred, refers to the accommodation relation information stored in the storage unit, and identifies a ripple alarm that identifies a device that may be affected by the failure The display information generating unit further generates a three-dimensional display screen data for displaying the device specified by the ripple alarm calculating unit and the faulty device.

  According to such a configuration, the screen display device can specify not only a device in which a failure has occurred but also a device that may be affected by the failure. Therefore, the screen display device can improve the visibility of the configuration of the virtual network in a large-scale carrier network.

  The display information generation unit generates three-dimensional display screen data for displaying the accommodation relation of the devices in the virtual network and the physical network with reference to the accommodation relation information.

  According to such a configuration, the screen display device can display the accommodation relationship of the devices even in a virtual network. Therefore, the screen display device can improve the visibility of the configuration of the virtual network in a large-scale carrier network.

  The display information generating unit generates a display of the change history of the device and the link of the virtual network.

  According to such a configuration, the screen display device can display the change history of the virtual network device and the link. Therefore, the screen display device can improve the visibility of the configuration of the virtual network in a large-scale carrier network.

  ADVANTAGE OF THE INVENTION According to this invention, the visibility of the structure of a virtual network in a large-scale carrier network and failure information can be improved.

It is a figure which shows the example which displayed the condition of the network based on geographical arrangement | positioning. It is a figure which shows the example which displayed the condition of the network based on the logical topology. It is a figure which shows the example which displayed collectively the connection condition of each layer of a network. It is a figure which shows the example of the connection condition between the specific tiers of a network, (a) represents the example of the connection condition of each tier of the network shown in FIG. 3, (b) is a figure with respect to Fig.4 (a). 3 shows an example in which the configuration of a transfer device, a transfer link, etc. interposed between control system devices is abstracted and displayed in a control link. It is a figure which shows the example of the connection condition between the specific floors of a network, (a) represents the example of the connection condition of each level of the network shown in FIG. 3, (b) is FIG. 3 shows an example in which the configuration of a transfer device, a control device, etc. intervening between service system devices is abstracted and displayed in a service link. It is a figure which shows the example displayed three-dimensionally. It is a figure which shows the example of a display screen at the time of setting the position and direction of a viewpoint. FIGS. 8A and 8B are diagrams illustrating a display screen example viewed from a viewpoint, where FIG. 7A illustrates a display screen example viewed from a first viewpoint illustrated in FIG. 7 and FIG. 7B illustrates a display viewed from a second viewpoint illustrated in FIG. An example screen is shown. It is the figure which showed the example of a screen of the past situation display selected by the time-axis bar, (a) represents the example of the screen of the past situation display selected by the time-axis bar, (b) is the time-axis bar. The example of the screen of the status display of the selected next time is represented. It is a figure which shows the example of a structure of a virtual network, and the display example of the movement trace of a virtual machine and a communication flow. It is a figure which shows the example of a display which leaves a failure location and a spreading slice by filter processing. It is a figure which shows an example which collects and displays a node group. It is a figure which shows the example of a display which leaves the node and link which are related to the slice of a display object by filter processing. It is a figure which shows the example of a display which performed the filter process for browsers. It is a figure which shows the example of a function of a screen display apparatus. It is a figure which shows an example of apparatus attribute information, apparatus connection (normal link) information, and apparatus arrangement setting information. It is a figure which shows an example of summary connection (summary link) information between apparatuses, accommodation relation information, and display setting information. It is a figure which shows the example of a processing flow of a screen display apparatus.

  A mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail with reference to the drawings as appropriate.

First, an outline for improving the visibility of the configuration of a virtual network and a failure occurrence state in a large-scale carrier network will be described.
First, three functions for improving visibility will be described.

(1) Functions for carrier network operation Necessary functions in maintenance work are, for example, to be able to grasp the scope of geographical failure and the location of configuration changes that frequently occur in virtual networks. . In addition, since the display of the accommodation relation of the network is particularly important in grasping the influence range of the failure, a function capable of displaying the accommodation relation in the network configuration is provided.

(2) Functions that support large-scale networks In the case of a large-scale network that forms a virtual network of several thousand slices and has tens of thousands of physical nodes, the total number of logical nodes and physical nodes can be up to several tens of millions. To reach. If all these nodes are displayed, the display limit of the screen and the human visibility limit will be exceeded. In addition, when checking the configuration of a virtual network at normal times when a failure has not occurred or when a failure has occurred, if the entire large-scale virtual network is displayed as it is, the logical nodes, logical links, virtual network slices and physical A large number of accommodation relations with the net are displayed, exceeding the display limit of the screen and the human visibility limit. In addition, since the number of devices and the number of device types in each slice of the virtual network are large, it is not possible to quickly determine the range affected when a failure occurs. Therefore, a function is required to improve the visibility of each slice so that it can be displayed.

(3) Function to cope with diversification of viewers In the conventional physical network, it is sufficient that only the operator knows the status of the network. However, along with network virtualization, infrastructure providers that provide physical networks, infrastructure as a service (IaaS) providers that borrow customers from virtual networks, and customers who provide services from IaaS providers Can be a person. Therefore, a function capable of providing a display suitable for the viewer is required. For example, the infrastructure operator can check the detailed configuration and state of both the physical network and the virtual network. Also, for example, an IaaS provider can check the detailed configuration and state of only the virtual network. Further, for example, the customer can check the rough configuration and state such as the connection between the virtual machines of the customer.

  Next, specific display examples of the function (1), the function (2), and the function (3) will be described with reference to the drawings.

  First, a display example embodying the function (1) will be described with reference to FIG. FIG. 10 is a display example for an infrastructure provider.

  FIG. 10 shows a display example of the configuration of the virtual network and the movement trajectory of the virtual machine and the communication flow. In FIG. 10, the physical network P is displayed in the lowest hierarchy, and the slices S1 and Sk of the virtual network are hierarchically displayed with different coordinate positions in the height direction. In FIG. 10, two slices of the virtual network are displayed, but the number is not limited to two, and may be one or three or more.

  When a device (logical node) exists in a slice of the virtual network, these device groups including devices (physical nodes) in the physical network P that are in an accommodation relationship with the device are connected to the same building frame B1, B2, B3 ( Surround with a two-dot chain line). By displaying the devices in the same building frame in each slice, it is possible to easily recall the housing relationship and the device group that spans multiple floors. Further, visibility can be improved by arranging a map (not shown) on the XY plane or displaying a building frame as a cylinder.

  In FIG. 10, symbols P1, P2, P3, P4, P5, and P6 each represent a physical device (physical node). Reference numerals VM1, VM2, VM3, VM4, VM5, and VM6 each represent a virtual machine (logical node). The physical devices P1, P2, P3, P4, P5 and P6 and the virtual machines VM1, VM2, VM3, VM4, VM5 and VM6 are connected by a dotted line. This dotted line represents the accommodation relationship between the physical device and the virtual machine. For example, the dotted line represents that the virtual machine VM1 is operating in the physical device P1. A solid line represents a link between devices. An ellipse represents a cluster, and the devices described in the ellipse have a cluster configuration.

  In the slices of the physical network P and the virtual network, the importance, the level, and the element type of the device may be expressed by changing the height within a range that does not interfere with other slices.

In FIG. 10, a star-shaped figure F indicating that a failure has occurred is displayed on the physical device P6 of the physical network P. Since this failure is spread to the virtual machine VM6 accommodated in the physical device P6, a star figure F indicating the state in which the failure has occurred is also attached to the virtual machine VM6 of the slice S1 of the virtual network. A trajectory indicating that the virtual machine VM5 accommodated in the physical device P5 is in the active state (change history) instead of the virtual machine VM6 is indicated by a white arrow L.
In FIG. 10, the logical link between the virtual machine VM6 and another virtual machine is displayed with a one-dot chain line, and the link after transition to the virtual machine VM5 is displayed with a solid line. Further, the virtual machine VM6 and its logical link may be displayed in a light color or the like for a predetermined time after the transition. Further, it is possible to reproduce the passage of time by using the time axis bar 159 shown in FIG. 9A, and to make it easy to recall the transition state of the virtual machine and the logical link by a fast-forward function or the like. .

  Next, display examples embodying the function (2) will be described with reference to FIGS. 11, 12, and 13.

  First, an example of collecting and displaying a group of nodes will be described with reference to FIG. 11 so that the general situation of the network can be easily grasped. When there are a large number of nodes in a building frame, a node group is aggregated in units of slices of a physical network or a virtual network, and displayed as one aggregation node (hereinafter also referred to as an aggregation device). However, if a star graphic (alarm) F indicating that a failure has occurred in the node group to be aggregated, the display of the star graphic F is left.

  Specifically, when there are a large number of node groups as in the display example denoted by reference numeral 1101, the aggregation filter processing 1102 is executed to perform conversion as in the display example denoted by reference numeral 1103. In the display example denoted by reference numeral 1103, a node group having a cluster configuration and a node group having a connection relationship with the node group are converted into one aggregation node, and a node group having an accommodation relationship with the aggregation node is also converted into one aggregation node. It has been converted. At that time, the star-shaped figure F attached to the node group to be aggregated is also attached to the aggregate node. Also, as indicated by a balloon 1104, the state of the aggregation node (number of alarms generated, CPU (Central Processing Unit) usage rate, etc.) is collectively displayed as device aggregation summary information.

The aggregation filter processing 1102 may use the number of nodes included in the field of view as a screen switching condition (an activation condition). In addition, the aggregation filter processing 1102 can set an activation condition for each slice.
Such an aggregation filter processing 1102 makes it possible to easily grasp the general status of the network when the number of display target elements is large.

Next, in order to make it possible to easily confirm the correspondence between a slice of a specific virtual network and a physical network, a display example in which nodes and links related to a slice to be displayed are left filtered is illustrated in FIG. Will be described. When checking the configuration of a virtual network at normal time when a failure has not occurred or when a failure has occurred, if a large-scale virtual network is displayed as it is, logical nodes, logical links, virtual network slices and physical networks A lot of storage relations are displayed, exceeding the display limit of the screen and the human visual limit.
Therefore, when displaying a slice of a specific virtual network, visibility is ensured by hiding other slices and physical devices and links in the physical network that are not related to the slice of the specific virtual network. .

  Specifically, when there are a large number of slices as in the display example indicated by reference numeral 1201, the display target slice filter processing 1202 for the slice Sk is executed and converted as in the display example indicated by reference numeral 1203. . The display target slice filter processing 1202 is executed based on filter information for selecting a virtual network device and link to be displayed and a physical network device and link. In the display example denoted by reference numeral 1203, the logical nodes and logical links of the slice Sk, and the physical nodes and physical links in the physical network P that are related to (accommodated with) the logical nodes and logical links are displayed. That is, the devices and links of the physical network that are irrelevant to the selected virtual network devices and links to be displayed (not in an accommodation relationship) are set to non-display and are not displayed on the screen. As a result, the correspondence between the slice of the virtual network to be displayed and the physical network can be easily confirmed. Note that the slice of the virtual network to be displayed is selected by the input device 320 (see FIG. 15).

  Next, in order to be able to quickly determine the range affected when a failure occurs, a display example of a failure occurrence location and a spread slice will be described with reference to FIG. In FIG. 13, it is assumed that the physical network P includes servers SR1, SR2, SR3, SR4 and network elements NE1, NE2, NE3, NE4. Further, it is assumed that the slice Sa of the virtual network includes virtual machines VM1, VM2, and VM3 and a logical switch VSW2. It is assumed that the slice Sb of the virtual network includes virtual machines VM4 and VM5 and a logical switch VSW5. A solid line represents a link between apparatuses, and a dotted line represents an accommodation relationship between a physical apparatus and a virtual machine.

  In FIG. 13, a star-shaped figure F indicating that a failure has occurred is displayed on the network element NE2. When a failure occurs in the device of the physical network P, the virtual network slices Sa and Sb to which the failure is spread are narrowed down and displayed, and it indicates that a failure has occurred in the logical switches VSW2 and VSW5 to which the failure has spread. A star figure is attached.

  In addition, information (effect summary information) related to the virtual machine group accommodated in the physical device in which the failure has occurred is displayed in a balloon 1301. For example, in FIG. 13, “impact summary information” displays that the number of accommodated logical networks is 300, the number of affected users is 20000, and the duration from the occurrence of a failure is 1 hour and 23 minutes. As a result, it is possible to quickly determine the range affected when a failure occurs.

Next, a display example embodying the function (3) will be described with reference to FIG.
The display screen is filtered and generated to suit the viewers of the infrastructure provider that provides the physical network, the IaaS provider that borrows the virtual network and provides the customer to the customer, and the customer who provides the service from the IaaS provider. The

FIG. 14 shows a display example in which filtering is performed for each display purpose according to the viewer.
The display example indicated by reference numeral 1401 represents the accommodation relationship between the slice Sa of the virtual network and the physical network P. The display example of the reference numeral 1401 is generated by filtering for an infrastructure provider so that detailed devices and link configurations and states of both physical networks and virtual networks can be confirmed.

  The IaaS provider filter processing 1402 is executed on the display example indicated by reference numeral 1401 to generate the display example indicated by reference numeral 1403. The filter processing for IaaS provider 1402 is executed based on filter information for selecting a virtual network device and a link to be displayed for the IaaS provider. The display example of reference numeral 1403 is generated by filtering for an IaaS provider so that the detailed configuration and state of only the virtual network can be confirmed.

  Further, the filter processing 1404 for IaaS users is executed on the display example indicated by reference numeral 1401 to generate the display example indicated by reference numeral 1405. The IaaS user filter process 1404 is executed based on filter information for selecting a virtual network device and a link to be displayed for an IaaS customer. The display example denoted by reference numeral 1405 is generated by filtering for an IaaS customer so that a rough configuration such as the connection between the virtual machines of the customer and the state can be confirmed.

  It is assumed that the filter information used for each filter process is provided as a preset so that it can be selected by a screen display device described later. Since each viewer (user) is provided with only necessary information regarding the device and link used by the user himself / herself, the user can easily grasp the network configuration and status.

(Screen display device)
Next, a function example of the screen display device 200 will be described with reference to FIG. The screen display device 200 has a hierarchy of all devices, connection information (links), cluster information that forms a plurality of systems (active / standby systems), occurrence of various alarms and failures for each slice of the physical network and virtual network of the network. Generate and display a 3D display screen showing the situation. The screen display device 200 is connected to each device constituting the network (for example, the transfer devices 121 and 122, the control device 141, the upper service device 161, and the lower service devices 101 to 103 shown in FIG. 9A). From these devices, information relating to network-related failures is received. The screen display device 200 is connected to an input device 320 such as a keyboard or a mouse that receives various instruction inputs (including preset filter processing types) related to screen display from the viewer. The screen display device 200 is connected to a display device 310 such as a liquid crystal display that performs screen display. The screen display device 200 generates a three-dimensional display screen indicating the network status based on the instruction input from the input device 320 and the information received from each device, and outputs and displays it on the display device 310. The viewer can check the status of the network by looking at the three-dimensional display screen.

The function of the screen display device 200 includes a storage unit 210, a processing unit 220, and an input / output unit 240.
The storage unit 210 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. The storage unit 210 stores various types of data that are referred to when the display screen of the processing unit 220 is generated, such as connection information of each device constituting the network, alarm information about the network, and the like.

  The processing unit 220 has a function of generating a display screen by referring to various data in the storage unit 210 based on an instruction input input from the input / output unit 240 and displaying the display screen on the display device 310 via the input / output unit 240. . The processing unit 220 is realized by a program execution process by a CPU included in the screen display device 200, a dedicated circuit, or the like. When the function of the processing unit 220 is realized by a program execution process, the storage unit 210 stores a program for realizing the function of the processing unit 220.

  The input / output unit 240 includes a communication interface and an input / output interface for communicating with other devices via a network such as the Internet or a LAN (Local Area Network). The input / output unit 240 receives various instruction inputs from the input device 320, and outputs the received instruction information to the processing unit 220. Further, the input / output unit 240 outputs the display screen information generated by the processing unit 220 to the display device 310.

  The storage unit 210 includes a device information storage unit 211, an alarm storage unit 212, and a setting storage unit 213.

The device information storage unit 211 further includes a device attribute information storage unit 2111 and a device connection relationship storage unit 2112.
The device attribute information storage unit 2111 stores device attribute information (see FIG. 16). This device attribute information includes the attributes of each slice of the virtual network and each device of the physical network (the floor), the coordinate position of the device on the map (a combination of latitude and longitude), the active system and the standby system for the device. Is information indicating a plurality of systems constituting a set (cluster). The device attribute information illustrated in FIG. 16 includes, for each device number (device identification information), a device name, a slice, a floor, a floor number (a floor number), a longitude and a latitude, and a plurality of systems. Shown in association with a device.

  Returning to FIG. 15, the device connection relation storage unit 2112 stores inter-device connection (normal link) information (see FIG. 16) at each time. Here, the normal link means a state where nodes and links are not aggregated. This inter-device connection (normal link) information is information indicating a connection relationship between devices in a virtual network slice or physical network. The inter-device connection (normal link) information illustrated in FIG. 16 includes, for each connection number, a device number (device number), a device name, a device number of a device linked to the device, and a device name. Shown in association. In addition to the physical network connection information (connection relation information 0), this inter-device connection (normal link) information includes connection information (connection information in slice S1 (slice S1) in addition to physical network connection information (connection relation information 0). Connection relation information 1) and connection information (connection relation information 2) in the slice Sk of the virtual network.

Further, the device connection relation storage unit 2112 stores inter-device outline connection (outline link) information (see FIG. 17) at each time. Here, the summary link means a state in which nodes and links are aggregated. This inter-device outline connection (outline link) information is information indicating a connection relation after aggregation processing of each apparatus in a virtual network slice or physical network. The device-to-device overview connection (summary link) information illustrated in FIG. 17 associates the device number (device number), the device name, the device number of the device linked to the device, and the device name for each connection number. It shows. In addition to the physical network connection information (connection relation information 0), the inter-device outline connection (summary link) information includes connection information (connection relation information 1) in the slice S1 of the virtual network, as illustrated in FIG. ) Etc.
In the following description, the inter-device connection (normal link) information (see FIG. 16) and the inter-device outline connection (outline link) information (see FIG. 17) may be simply referred to as connection information.

  The device connection relationship storage unit 2112 stores accommodation relationship information (see FIG. 17) indicating the accommodation relationship between a device (virtual machine) in a slice of the virtual network and a physical device of the physical network.

  Returning to FIG. 15, the alarm storage unit 212 stores information (including failure status) related to a virtual network slice, a physical network device, and a link alarm at each time. Information related to the alarm is created by the alarm analysis unit 223.

The setting storage unit 213 stores various setting information such as device arrangement setting information shown in FIG. 16 and display setting information shown in FIG.
In the device arrangement setting information of FIG. 16, display slice information indicating the display hierarchy of the slice, attribute hierarchy setting information indicating the display hierarchy of the hierarchy to which the device belongs, and hierarchy coordinate setting information indicating the height coordinate of the display hierarchy are stored. ing. The height coordinate of each device is set to a lower coordinate as the device having the attribute located at the end of the network. Note that the building frame information shown in FIG. 16 includes, when a device (logical node) exists in a slice of a virtual network, these devices including a device (physical node) in the physical network P that is in an accommodation relationship with the device. This is referred to when a mark indicating the group is displayed on the screen.

  The setting storage unit 213 stores display slice filter setting information and trajectory display setting information as display setting information (see FIG. 17). In FIG. 17, for example, the setting number “901”, the filter name “IaaS001”, the display slice number “10, 11, 12”, and the display link “normal link” are associated with the display slice filter setting information. In this other example, although not shown in FIG. 17, aggregation processing 1102 for each display purpose (see FIG. 11), display target slice filtering processing 1202 (see FIG. 12), and display processing for infrastructure providers Filter information related to the filter processing for IaaS provider 1402 (see FIG. 14) and the filter processing for IaaS user 1404 (see FIG. 14) is stored in the display slice filter setting information. In addition, in FIG. 10, when the trajectory display setting information represents a trajectory (open arrow L) indicating that the virtual machine has transitioned from the virtual machine VM6 to the virtual machine VM5, the state before the transition is displayed. Information about time.

  Next, the processing unit 220 will be described. The processing unit 220 includes a device attribute information analysis unit 221, a device connection relationship analysis unit 222, an alarm analysis unit 223, a ripple alarm calculation unit 224, a coordinate calculation unit 225, a display information generation unit 226, and a viewpoint determination unit 228.

  The device attribute information analysis unit 221 is operated by the input device 320, acquires the time set by the time axis bar 159 (see FIG. 9A) via the operation unit 244, and corresponds to the acquired time. The device attribute information (see FIG. 16) is read from the device attribute information storage unit 2111.

  The device connection relationship analysis unit 222 is operated by the input device 320, acquires the time set by the time axis bar 159 (see FIG. 9A) by the operation unit 244, and a device corresponding to the acquired time Inter-device connection (normal link) information (see FIG. 16) and inter-device outline connection (outline link) information (see FIG. 17) are acquired from the device connection relation storage unit 2112. Then, the device connection relation analysis unit 222 connects the device connection information between the two devices to determine the device connection structure of the entire network.

  The alarm analysis unit 223 acquires an alarm (including a failure state) issued from each device on the network via the alarm reception unit 241 and information on the device state (CPU usage rate, temperature value, etc.). In addition, the alarm analysis unit 223 acquires the device attribute information from the device attribute information analysis unit 221 and creates information related to the alarm in which the link or device in which the alarm is generated is associated with the alarm occurrence time, Store in the alarm storage unit 212.

  The spread alarm calculation unit 224 acquires information related to the alarm from the alarm storage unit 212, and acquires accommodation relation information (see FIG. 17) between the virtual machine and the physical device from the device connection relation storage unit 2112. When a warning is generated in a certain physical node (or physical link), the ripple alarm calculation unit 224 is accommodated in the physical node (or physical link) with reference to the accommodation-related information (see FIG. 17). It is determined that there is a possibility that the influence has spread to the logical node (or logical link) in the virtual network, and the propagation alarm information is generated. Here, the spillover alarm information is information of a device (or link) that has been determined that the influence of the fault that has occurred may be spilling over. In addition, when an alarm is generated in a logical node (or logical link) within a slice of a virtual network, the ripple alarm calculation unit 224 refers to the accommodation relation information (see FIG. 17) and slices the virtual network. A physical device (or physical link) that accommodates a logical node (or logical link) in the network, and a logical node (or logical link) in another slice of the virtual network that is accommodated in this physical device (or physical link) ) Is also likely to be affected, and ripple alarm information is generated.

  The coordinate calculation unit 225 acquires various types of information at the time acquired via the operation unit 244 from the storage unit 210, and coordinates positions (coordinate data) such as devices, links, virtual network slices, and alarms on the three-dimensional display screen. To decide. Details of the coordinate calculation unit 225 will be described later.

  The display information generation unit 226 is based on the coordinate data calculated by the coordinate calculation unit 225, each device, a link connecting each device, each device and a device that may be affected by the alarm and failure of the link, a link 3D display screen data arranged in a superimposed manner is generated at each time, and is output to the display device 310 via the input / output unit 240. Further, when the display information generation unit 226 acquires the selection input of the filter information selected by the input device 320 via the operation unit 244, the display information generation unit 226 executes a filtering process corresponding to the acquired filter information, It has a function of extracting a link and generating 3D display screen data in which the extracted display target device and the link are arranged for each time. In addition, when there is a location where a configuration change has occurred (change history), the display information generation unit 226 changes the color or brightness of the location, such as changing or flashing the location. Has a function of executing a highlighting process for generating the display. Note that the display information generation unit 226 includes the overview screen generation unit 227 as a function.

The summary screen generation unit 227 executes summary display processing.
Specifically, the summary screen generation unit 227 selects a device group composed of a plurality of devices in the building frame and / or slice in which the aggregation filter processing 1102 (see FIG. 11) is to be executed. A process represented by one aggregation device is executed, and device aggregation summary information is generated. The device aggregation summary information is, for example, the total number of alarms generated by the aggregation device, the current total value and the maximum total value of the CPU usage rate, and the like. Specifically, as shown in FIG. 11, a device group having a cluster configuration of the physical network P in the display example denoted by reference numeral 1101 and a device group having different floors connected to the device group are represented in the display example denoted by reference numeral 1103. It is represented by one aggregation device. Moreover, the summary screen generation unit 227 deletes the link in the aggregation device. Then, the summary screen generation unit 227 aggregates and expresses links connected to the aggregation device from other device groups into one. The summary screen generation unit 227 recalculates the coordinates of the aggregation device, the coordinates of the aggregated link, and the display coordinates of the device aggregation summary information. Then, the summary screen generation unit 227 generates three-dimensional display screen data that displays the aggregation device and the aggregated link. The apparatus aggregation summary information is displayed as an icon or the like in addition to a pop-up display.

  The viewpoint determination unit 228 acquires the position and direction (first viewpoint and second viewpoint shown in FIG. 7) of the viewpoint (camera) input via the input / output unit 240, and determines the position and direction of the acquired viewpoint. The information is output to the display information generation unit 226.

  The input / output unit 240 includes an input / output interface with the display device 310, the input device 320, and each device of the network. The input / output unit 240 includes an alarm receiving unit 241, a display unit 243, and an operation unit 244.

  The alarm receiving unit 241 receives alarm and device state information (CPU usage rate, temperature value, etc.) from each device on the network, and outputs the received alarm to the alarm analyzing unit 223. The alarm includes at least the name of the device that issued the alarm.

  The display unit 243 outputs the 3D display screen generated by the display information generation unit 226 to the display device 310.

  The operation unit 244 has a function of acquiring input information input by the input device 320 and outputting the input information to the coordinate calculation unit 225, the display information generation unit 226, or the viewpoint determination unit 228. For example, the operation unit 244 outputs time information input by the input device 320 to the coordinate calculation unit 225, and outputs information on the position and direction of the viewpoint input by the input device 320 to the viewpoint determination unit 228. In addition, the operation unit 244 selects the aggregation filter process 1102 (see FIG. 11), the display target slice filter process 1202 (see FIG. 12), the display process for the infrastructure provider, and the IaaS provider selected by the input device 320. The selection information of the filtering process 1402 (see FIG. 14) and the filtering process 1404 for IaaS user (see FIG. 14) is output to the display information generating unit 226 as input information.

  Next, the coordinate calculation unit 225 will be described in detail. The coordinate calculation unit 225 acquires time information as input information by the operation unit 244, acquires device attribute information (see FIG. 16) from the device attribute information analysis unit 221, and connects between devices (normally from the device connection relation analysis unit 222) Link) information (see FIG. 16) and inter-device connection (summary link) information (see FIG. 17) are acquired, and apparatus arrangement setting information (see FIG. 16) is acquired from the setting storage unit 213. In addition, the coordinate calculation unit 225 acquires information related to an alarm associated with each device or link from the alarm storage unit 212, and acquires the propagation alarm information associated with each device from the propagation alarm calculation unit 224. .

  The coordinate calculation unit 225 identifies the device and the link between the devices at the selected time with reference to the connection information. In addition, the coordinate calculation unit 225 refers to the device attribute information (see FIG. 16) and the device arrangement setting information (see FIG. 16), and specifies the XY axes on the three-dimensional display screen of the identified device and the link between the devices. The coordinate position and the coordinate position of the Z axis corresponding to the floor to which each device belongs are determined. Also, the coordinate calculation unit 225 determines that the coordinate positions in the height direction of the slices of the plurality of virtual networks are different (see FIG. 10). The coordinate calculation unit 225 refers to the device attribute information, and when there is a cluster that constitutes an active system / standby system with a certain device, an ellipse display indicating the cluster is displayed on the three-dimensional display screen (see FIG. 10). Place with. Also, the coordinate calculation unit 225 adjusts the arrangement position so as to reduce the intersection of the connection relationships between the devices on the three-dimensional display screen and the device overlap in each layer.

In addition, the coordinate calculation unit 225 refers to the information related to the alarm in the alarm storage unit 212, and if there is an alarm at the selected display time, the coordinate position of the alarm is set as the alarm target on the three-dimensional display screen. Near the device and link. Then, the coordinate calculation unit 225 outputs data (coordinate data) in which the device, the link, and the alarm are superimposed and arranged to the display information generation unit 226.
Then, the display information generation unit 226 generates 3D display screen data based on the coordinate data acquired from the coordinate calculation unit 225.

(Processing flow)
Next, an example of a processing flow of the screen display device 200 will be described with reference to FIG. 18 (refer to FIGS. 15, 16, and 17 as appropriate). Here, as an example of the processing flow, a case where the mode of the aggregation filter processing 1102 (see FIG. 11) is executed will be described.

  In step S <b> 1, the device attribute information analysis unit 221 acquires device attribute information (see FIG. 16) from the device attribute information storage unit 2111. Thereby, when the operation unit 244 acquires time information input from the input device 320, the attribute (level) of each device corresponding to the time and the coordinate position of the XY axes of each device can be known.

  In step S <b> 2, the device connection relationship analysis unit 222 acquires device connection (normal link) information (see FIG. 16) and device summary connection (summary link) information (see FIG. 17) from the device connection relationship storage unit 2112. To do. Thereby, the inter-device connection structure of the entire network corresponding to the selected time can be known.

  In step S3, the coordinate calculation unit 225 acquires device arrangement setting information (see FIG. 16) from the setting storage unit 213. Thereby, the Z-axis coordinate corresponding to the floor to which each device corresponding to the selected time belongs can be known.

  In step S4, the coordinate calculation unit 225 refers to the device attribute information acquired in S1, the inter-device connection structure acquired in S2, and the device arrangement setting information acquired in S3, and the device and device corresponding to the selected time. The coordinate position of the XY axis on the three-dimensional display screen and the coordinate position of the Z axis corresponding to the floor to which each device belongs are determined for the link between them and the slice of the virtual network. At this time, the coordinate calculation unit 225 refers to the device attribute information, and displays on the three-dimensional display screen a display (ellipse, see FIG. 10) surrounding the device group constituting the cluster that forms a working device and a standby system. Deploy. Furthermore, when a mark such as a building frame is arranged at a place where a device group that spans multiple floors is installed, the coordinate calculation unit 225 refers to building frame information (see FIG. 16) included in the device arrangement setting information. Then, a building frame (for example, symbols B1, B2, B3, etc. shown in FIG. 10) is arranged on the three-dimensional display screen.

  In step S5, the coordinate calculation unit 225 adjusts the coordinate position of each device and link so as to reduce the crossing of the connection relationship between the devices on the three-dimensional display screen and the overlap of the devices in each layer.

  In step S <b> 6, the warning analysis unit 223 acquires a warning that has already been received by the warning reception unit 241. Then, the alarm analysis unit 223 acquires device attribute information (see FIG. 16) from the device attribute information analysis unit 221, and specifies a device and a link that are targeted for the alarm. Also, the alarm analysis unit 223 creates information related to an alarm in which the link and device that are the target of the alarm and the alarm occurrence time are linked, and outputs the information to the alarm storage unit 212. As a result, information related to the alarm over time is stored in the alarm storage unit 212.

  In step S7, the coordinate calculation unit 225 acquires device information (for example, device name) included in the alarm at the time selected in S1 from the information related to the alarm stored in the alarm storage unit 212, and in S5. The coordinate position of the alarm on the three-dimensional display screen is determined with reference to the adjusted coordinate position of each device and link.

  In step S8, the coordinate calculation unit 225 refers to the coordinate position of the alarm determined in S7 and the coordinate position of each device and link adjusted in S5, and displays the network device, link, and link on the three-dimensional display screen. Arrangement data in which alarms are superimposed is generated. Then, the coordinate calculation unit 225 outputs the generated arrangement data to the display information generation unit 226.

  In step S <b> 9, when the viewpoint determination unit 228 acquires a viewpoint selection input via the operation unit 244, the viewpoint determination unit 228 determines the camera coordinate position and direction of the 3D display screen corresponding to this viewpoint. Then, the viewpoint determination unit 228 outputs the camera coordinate position and direction to the display information generation unit 226.

  In step S <b> 10, the display information generation unit 226 generates display coordinate data viewed from the viewpoint selected by the input device 320 based on the camera coordinate position and direction acquired from the viewpoint determination unit 228.

  In step S <b> 11, when the display information generation unit 226 acquires a filter information selection input related to the filter processing (in this processing flow, the aggregation filter processing 1102) via the operation unit 244, the display setting information of the setting storage unit 213 is displayed. With reference to the display slice filter setting information (see FIG. 17), filter processing is executed on the devices and links in S8, and the devices and links to be displayed are extracted.

  In step S12, the summary screen generating unit 227 executes summary display processing. However, this step S12 is executed in the case of the aggregation filter processing 1102. Specifically, the summary screen generation unit 227 collects a group of nodes, which are acquired in S11, spanning multiple levels of display, into one aggregation device, or displays a single link to the aggregation device.

  In step S13, if there is a location where a configuration change has occurred (change history), the display information generation unit 226 changes the color or brightness of the location, flashes, etc. Perform highlighting processing.

  In step S <b> 14, the display information generation unit 226 generates 3D display screen information (display data) by adjusting coordinates and colors to be displayed, and the generated 3D display screen information to the display device 310. Output.

  When the display target slice filter processing 1202 (see FIG. 12) is executed in step S11, the display information generation unit 226 receives the virtual network slice selection information via the operation unit 244. With reference to the relationship information (see FIG. 17), the device of the physical network that is in the accommodation relationship with the device in the slice of the virtual network is extracted.

  In addition, in the case where the display process for the infrastructure provider (normal link) is performed in step S11, the display information generation unit 226 includes a virtual network and a physical network apparatus of the network constructed by the infrastructure provider apparatus and the link. And extract links.

  In addition, when the IaaS provider filter processing 1402 (see FIG. 14) or the IaaS user filter processing 1404 (see FIG. 14) is executed in step S11, the display information generating unit 226 performs the processing as shown in FIG. Then, after performing the display process for the infrastructure provider (normal link) to generate the display example of reference numeral 1401, the corresponding filter process is executed to extract the display target device and link.

As described above, when the operation unit 244 acquires the time input from the input device 320, the screen display device 200 of the present embodiment refers to the storage unit 210 and refers to the coordinate information of the device corresponding to the acquired time, between the devices. Specify connection information, accommodation-related information, and alarm information. The screen display device 200 determines the display positions of the virtual network and physical network devices, links, and alarm information based on the device coordinates corresponding to the acquired time, the connection information between the two devices, and the accommodation relationship information. The display function.
In addition, the screen display device 200 has the following functions.
(1) When a device (logical node) is present in a slice of a virtual network on the three-dimensional display screen, these device groups including the device (physical node) in the physical network that is in a housing relationship with the device are connected to the same building. Function to display by enclosing with a frame (see FIG. 10).
(2) The function of displaying the coordinate position of the virtual network device and the link by changing the coordinate in the height direction for each slice of the virtual network (see FIG. 10).
(3) A function for displaying a group of devices that span multiple floors as one aggregation device (see FIG. 11).
(4) A function of executing filtering processing for selecting virtual network devices and links and physical network devices and links to be displayed for each display purpose, and determining and displaying the coordinate positions of the selected devices and links (see FIG. 14). ).
(5) For a slice of a virtual network to be displayed, a device of a physical network that is in an accommodation relationship with a device in the slice of the virtual network is identified, and a device of the identified physical network related in the slice of the virtual network and A function of extracting a link and hiding a physical network device and a link that have not been extracted (see FIG. 12). That is, the physical network devices and links unrelated to the devices in the virtual network slice are not displayed.
(6) A function for identifying a device that may be affected by a failure when a failed device and link are acquired (see FIG. 13).
(7) A function of displaying a movement trajectory when a virtual machine or a link is changed due to the occurrence of a failure (see FIG. 10).
In this way, the screen display device 200 generates a display screen for displaying virtual network and physical network devices, links, and alarm information, and improves the configuration of the virtual network and the visibility of fault information in a large-scale carrier network. Can be made.

Although the present embodiment has been described on the assumption of the accommodation relationship between the physical network and the slice group of the virtual network, the screen display device 200 also applies to a case where a slice of a sub virtual network is further configured in a slice of a certain virtual network. Can be applied.
When a plurality of applications operate within a virtual network slice and the applications communicate with each other, the application is a virtual machine in the sub virtual network slice, and the communication flow is a VPN in the sub virtual network slice. By considering it as (Virtual Private Network), the processing of the screen display device 200 can be applied.
Further, in the present embodiment, a case has been described in which slices of the virtual network are displayed with different heights (FIG. 10 and the like), but the slices of the virtual network may be displayed while being shifted in the horizontal direction.

101, 102, 103 Lower service device 121, 122 Transfer device 141 Control device 161 Upper service device 200 Screen display device 210 Storage unit 211 Device information storage unit 212 Alarm storage unit 213 Setting storage unit 220 Processing unit 221 Device attribute information analysis unit 222 Device connection relation analysis unit 223 Alarm analysis unit 224 Ripple alarm calculation unit 225 Coordinate calculation unit 226 Display information generation unit 227 Overview screen generation unit 228 Viewpoint determination unit 240 Input / output unit 241 Alarm reception unit 243 Display unit 244 Operation unit 310 Display device 320 Input device 1102 Aggregation filter processing 1202 Display target slice filter processing 1402 IaaS provider filter processing 1404 IaaS user filter processing 2111 Device attribute information storage unit 2112 Device connection relationship storage unit B1, B , B3 building frame

Claims (7)

A screen display device for generating a display screen for displaying at least a virtual network and a physical network device and a link between the devices,
A storage unit that stores the coordinate information of the devices of the physical network, the connection information between the devices, the accommodation relationship information between the devices of the physical network and the devices of the virtual network, and the time;
An operation unit for obtaining input information from the input device;
With reference to the coordinate information of the device of the physical network, the connection information and the accommodation relation information, the display coordinates of the slice of the virtual network corresponding to the time information acquired as the input information by the operation unit, the virtual A coordinate calculation unit for determining display coordinates of the network and the device and link of the physical network;
Based on display coordinates determined by the coordinate calculation unit, a display information generation unit that generates three-dimensional display screen data in which the virtual network slice, the virtual network, and the physical network devices and links are arranged for each time. And
The storage unit further stores filter information for selecting a device and link of the virtual network and a device and link of the physical network for each display purpose,
The display information generation unit acquires the filter information selected and input by the input device as the input information through the operation unit, and extracts the display target device and the link based on the filter information. And generate 3D display screen data
Screen display device comprising a call. Generating three-dimensional display screen data for displaying a device group composed of a plurality of the devices selected by the filter information as one aggregation device, and displaying information on the state of the aggregation device, and between the aggregation devices The screen display device according to claim 1 , further comprising: a summary screen generation unit that generates three-dimensional display screen data for displaying the links as one link. The filter information is set to select the device and the link used by the user for each user,
The display information generation unit displays the selected device and the link on the slice of the physical network and the virtual network for the user, or displays only on the slice of the virtual network for the user. The screen display device according to claim 1 . The filter information is set so as to select the device and the link of the physical network related to the slice of the virtual network to be displayed, and does not display the device and the link of the physical network that are not selected. The screen display device according to claim 1 , wherein: It further includes a ripple alarm calculation unit that acquires information on a device in which a failure has occurred, refers to the accommodation relation information stored in the storage unit, and identifies a device that may be affected by the failure,
2. The screen display device according to claim 1 , wherein the display information generation unit generates three-dimensional display screen data for displaying the device specified by the ripple alarm calculation unit and the device in which the failure has occurred. . The display information generating unit generates three-dimensional display screen data for displaying the accommodation relation of the devices in the virtual network and the physical network with reference to the accommodation relation information. The screen display device described. The screen display device according to claim 1, wherein the display information generation unit generates a display of the change history of the device and the link of the virtual network.