WO2015060683A1

WO2015060683A1 - Method for providing overlay network interworking with underlay network and system performing same

Info

Publication number: WO2015060683A1
Application number: PCT/KR2014/010065
Authority: WO
Inventors: 최기만
Original assignee: 주식회사 케이티
Priority date: 2013-10-24
Filing date: 2014-10-24
Publication date: 2015-04-30

Abstract

A method and a system for providing an overlay network interworking with an underlay network are disclosed. The method for providing the overlay network interworking with the underlay network comprises a method for providing an overlay based virtual network between data centers (DC) connected with a wide area network (WAN), the method comprises the steps of: identifying accessibility between a source customer system connected to a first network virtualization device included in a first DC and an object customer system connected to a second virtualization device included in a second DC by a network virtualization management device; transferring forwarding information obtained by interworking with the first network virtualization device to the second virtualization device by the network virtualization management device; and configuring a path so as to perform a tunneling process between the first network virtualization device and the second network virtualization device using information on a WAN section and a control command by the network virtualization management device.

Description

Method of providing an overlay network by interworking with an underlay network and a system for performing the same

The present invention relates to network virtualization, and more particularly, to a method and system for providing an overlay network in conjunction with an underlay network.

The overlay network refers to a virtual network configured on a physical network.

1 is a conceptual diagram illustrating a general system for providing an overlay network. Referring to FIG. 1, an overlay technology for configuring an overlay network includes a network virtualization authority (NVA) 100 and a network virtualization edge (NVE) to configure a virtual network. (210, 220).

In detail, the overall configuration of network virtualization based on overlay is managed by the NVA 100, and the NVE 210 receives overlay information from the NVA 100 to provide overlay functions such as encapsulation / decapsulation. Perform.

A number of tenant systems (TSs) 500 are connected to NVEs 210 and 220 located in a data center (DC), and the TS 500 is an element such as a server or storage. Can be

On the other hand, with the emergence of Software Defined Networking (SDN) technology that performs software-based flexible control over the entire network of carriers,

DC controllers

310 and 320 are responsible for network configuration and control functions within DC. NVE has a structure that can communicate with the DC controller (310, 320) for the necessary information request.

In addition, in order to configure an underlay network located in a wide area network (WAN) section, the WAN controller 400 is responsible for configuring and controlling the WAN section network equipment 600.

However, information on the configuration / operation / status related to the underlay network collected through the WAN controller 400 is not utilized to construct the overlay network.

That is, the related art related to the overlay network configuration focuses only on the overlay network configuration regardless of information such as available resources, network equipment operation status, WAN section path, etc. regarding the underlay network.

Therefore, in the prior art, since an overlay-based virtual network is configured regardless of a failure in an underlay network section or a network operation rate for each section, the efficiency of network resource usage cannot be guaranteed and the performance of the virtual network can be guaranteed. No problem occurs.

An object of the present invention for solving the above problems is to provide a method for providing an overlay network in conjunction with an underlay network.

Another object of the present invention for solving the above problems is to provide a system for providing an overlay network in conjunction with an underlay network.

A method for providing an overlay network in connection with an underlay network according to an aspect of the present invention for achieving the above object is based on an overlay between data centers (DCs) connected to a wide area network (WAN). A method of providing a virtual network, wherein the network virtualization management device has access between a source customer system connected to a first network virtualization device included in a first DC and a destination customer system connected to a second network virtualization device included in a second DC. Confirming the possibility; forwarding the forwarding information acquired by the network virtualization management device in association with the first network virtualization device to the second network virtualization device; and the network virtualization management device providing information and control commands for the WAN section. Tunnel between the first network virtual device and the second network virtual device To ensure that the process is carried out and a step of setting the path.

Here, the checking of the accessibility may include using mapping information on the source customer system obtained by the network virtualization management apparatus from the first network virtualization apparatus and mapping information on the target customer system obtained from the second network virtualization apparatus. This can be done by updating the mapping table.

Here, in the checking of the accessibility, the first network virtualization apparatus may check whether the source customer system is accessible to the destination customer system using the updated mapping table.

Here, the mapping information for the source customer system may be mapping information between a virtual access point (VAP) and a virtual network instance (VNI) to which the source customer system is connected.

Here, the mapping information for the target customer system may be mapping information between the VAP and the VNI to which the target customer system is connected.

Here, the forwarding information may include information about a virtual network identifier (VNID) to be used when tunneling for overlay network configuration.

The information on the VNID may be determined by the first network virtualization device based on mapping information between the second network virtualization device and the target customer system received from the network virtualization management device.

Here, in the setting of the path, the network virtualization management apparatus selects a use path in the WAN section based on the information on the WAN received from the WAN controller controlling the WAN, and selects information on the selected use path. Delivering to a network virtualization device; and transmitting, by the network virtualization management device, a control command to a first DC controller controlling a DC, a second DC controller controlling a 2 DC, and a WAN controller using a selected use path. can do.

Here, in the setting of the path, the network virtualization management apparatus receives the result of the control command and the state information of the first DC, the second DC and the WAN according to the control command, and controls the network controlled by the network virtualization management apparatus. The method may further include updating management information and performing a command to perform a tunneling process to the first network virtualization device based on the updated network control management information.

Here, the setting of the path may include: delivering, by the first network virtualization device, the encapsulated packet to the second network virtualization device based on an execution command for the tunneling process; Decapsulating the encapsulated packet may further include setting a path for configuring a virtual network with the first network virtualization apparatus.

Here, the information on the WAN section may be information on available resources and available paths in the WAN section.

Here, the control command may be a command for bandwidth and QoS control.

According to another aspect of the present invention, there is provided a method for providing an overlay network in conjunction with an underlay network, including: a first data center (DC) connected to a wide area network (WAN) and a first network; A method for providing an overlay-based virtual network between 2 DCs, the network virtualization management apparatus selecting a usage path within a WAN interval based on information about a WAN received from a WAN controller controlling the WAN, and Delivering the information to a first network virtualization apparatus included in the first DC, a first DC controller controlling the first DC using a selected use path, and a second controlling the second DC Communicating control commands for overlay network configuration to the DC controller and the WAN controller.

According to another aspect of the present invention, there is provided a method for providing an overlay network by interworking with an underlay network, which includes overlaying between data centers (DCs) connected by a wide area network (WAN). A method for providing a virtual network based on the method, the first network virtual device receiving an execution command for the tunneling process from the network virtualization management device, the first network virtual device is encapsulated based on the execution command for the tunneling process Delivering the migrated packet to a second network virtualization device, and the second network virtualization device decapsulating the encapsulated packet to establish a path for configuring a virtual network with the first network virtualization device. do.

Here, the execution command for the tunneling process, the network virtualization management device selects the usage path in the WAN interval based on the information on the WAN received from the WAN controller controlling the WAN, and updated using the selected usage path. Can be generated based on the network control management information.

The method and system for providing an overlay network in conjunction with the underlay network according to the present invention as described above, by configuring the overlay network based on available resources, network state information, etc. possessed by the underlay network, to improve the performance of the overlay network Can be.

In addition, the overlay-based network virtualization service can be diversified through the efficiency of overlay network performance.

1 is a conceptual diagram illustrating a general system for providing an overlay network.

2 is a conceptual diagram illustrating a system for providing an overlay network in association with an underlay network according to an embodiment of the present invention.

3 is an exemplary diagram for describing a service discovery procedure for configuring an overlay network according to an embodiment of the present invention.

4 is an exemplary diagram for describing an address advertising procedure for configuring an overlay network according to an embodiment of the present invention.

5 is an exemplary diagram for describing a tunnel mapping and path setup procedure for configuring an overlay network according to an embodiment of the present invention.

6 is an exemplary diagram for explaining interworking between a network virtualization management apparatus and a WAN controller for configuring an overlay network according to an embodiment of the present invention.

7 is an exemplary view for explaining an interworking between a network management apparatus and a DC controller for configuring an overlay network according to an embodiment of the present invention.

8 is a block diagram illustrating a configuration of a network virtualization management apparatus for overlay network configuration according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, a method for providing an overlay network in conjunction with an underlay network according to an embodiment of the present invention may include a network virtualization authority (NVA) 100. Unlike the communication with the network virtualization edge (NVE) 210 and 220 only, the

DC controller

310 and 320 and the wide area network (WAN) controlling the data center (DC) are controlled. By communicating with the WAN controller 400 that controls) can utilize the network state and operation information of the interval (Intra DC) and inter-DC (Inter DC) section.

In detail, the

DC controllers

310 and 320 may configure the network in the DC, monitor resources in the DC, performance and failures, control the bandwidth and Qos in the DC, and the customer system (TS: Tenant System) 500 and the like. Information management on a virtual network instance (VNI) and monitoring of the operation status (eg, shutdown, migration, startup, etc.) of the TS may be performed. For example, the first DC controller 310 may control the first DC, and the second DC controller 320 may control the second DC.

The WAN controller 400 may perform functions such as network configuration of the WAN section, monitoring of resources, performance, failures, etc. in the WAN section, controlling bandwidth and QoS in the WAN section, and selecting a route in the WAN section.

The

NVEs

210 and 220 forward rechability information to TSs connected to both ends of an overlay network, TS, Virtual Network Identifier (VNID), and mapping information between NVEs, and tunneling. Encapsulation / decapsulation, etc., may be performed.

The NVA 100 basically manages a mapping table that stores information about NVE / VNID / TS related to the overlay network configuration through communication with the

NVEs

210 and 220, and uses the overlay network configuration by using the same. Can manage.

In addition, the NVA 100 may communicate with the WAN controller 400 and the

DC controllers

310 and 320 to receive various information on the WAN section and information in the DC to configure the overlay network. It is possible to efficiently configure the overlay network while efficiently using the resources of.

The procedure for configuring the overlay network may be largely performed by sequentially performing a service discovery procedure, an address advertising procedure, and a tunnel mapping and path setup procedure. .

The service discovery procedure refers to a process of confirming a provisioning possibility between a source TS and a destination TS.

In addition, the address advertising procedure refers to a process of forwarding mapping information on a VNID (Virtual Network Identifier), TS, etc. to be used in tunneling between an ingress NVE and an egress NVE.

In addition, tunnel mapping and path setup procedures include tunneling using encapsulation and decapsulation to monitor and route available resources in the WAN section located between the ingress and egress NVEs, and to deliver packets based on overlay networks. It means the route setting process through.

Each process will be described in detail with reference to FIGS. 3 to 7 as follows. 3 to 7, the first DC controller and the first NVE operate in the first DC, the second DC controller and the second NVE operate in the second DC, and the WAN controller operates in the first DC and the second DC. It works to control the WAN that connects it.

Referring to FIG. 3, a process of identifying a provisioning possibility between a source TS and a target TS will be described.

According to an embodiment of the present invention, an overlay-based virtual network may be provided between data centers (DCs) connected by a wide area network (WAN).

First, the NVA may check the accessibility between the source TS connected to the first NVE included in the first DC and the destination TS connected to the first NVE included in the second DC.

The NVA may be performed by updating the mapping table using the mapping information on the source TS obtained from the first NVE and the mapping information on the destination TS obtained from the second NVE. That is, it may be checked whether the source TS is accessible to the destination TS by using the mapping table in which the first NVE is updated.

Here, the mapping information for the source TS may be mapping information between a virtual access point (VAP) and a virtual network instance (VNI) to which the source TS is connected.

In addition, the mapping information for the target TS may be mapping information between the VAP and the VNI to which the target TS is connected.

More detailed description is as follows.

The NVA may request the first NVE to create an overlay network while designating a source TS and a destination TS at step S310.

The first NVE may request inquiry to the first DC controller of Virtaul Network Instance (VNI) information including the source TS (S320).

The first DC controller transfers the VNI information requested by the first NVE to the first NVE (S321), and the first NVE received the VNI information maps a VNI and a VNI to which the source TS is connected. In operation S330, mapping information of the first NVE related to the source TS may be transmitted to the NVA (S331).

The NVA may update a mapping table using the mapping information received from the first NVE (S340). In addition, the second NVE may transfer mapping information of the second NVE related to the target TS to the NVA in cooperation with the second DC controller, and the NVA may generate a mapping table using the mapping information received from the second NVE. Of course you can update it. That is, the NVA can collect mapping information between each NVE and TS by communicating with a plurality of NVEs managed by the NVA, and update the mapping table using the NVA.

The first NVE may query the NVA for accessibility to the target TS (S350), and the NVA may query the mapping table (S351) to inform the second DC controller managing the target TS of the accessibility of the target TS to the VNI. Inquiry can be requested (S353).

The second DC controller may check the accessibility of the VNI for each TS according to the inquiry request of the NVA (S360), and transmit the result to the NVA (S361).

The NVA may deliver a result of the accessibility to the target TS received from the second DC controller to the first NVE (S370). In addition, the NVA may update the mapping table using the result of the accessibility to the destination TS received from the second DC controller.

Accordingly, the first NVE may complete a service discovery procedure for overlay network configuration by confirming both accessibility of the source TS and the destination TS.

Referring to FIG. 4, a process of forwarding mapping information on a virtual network identifier (VNID), a TS, etc. to be used in tunneling between an ingress NVE and an egress NVE will be described.

After the service discovery procedure is completed, an address advertising procedure may be performed.

The NVA may transfer forwarding information acquired in association with the first NVE to the second NVE. Here, the forwarding information may include information about a virtual network identifier (VNID) to be used when tunneling for overlay network configuration. In addition, the information on the VNID may be determined by the first NVE based on mapping information between the second NVE and the target TS received from the NVA.

More detailed description is as follows.

The first NVE may make an inquiry request for access to the target TS as an NVA (S410), and the NVA may query a mapping table (S420).

The NVA may transfer mapping information between the target TS and the target NVE (second NVE), which are a result of the inquiry request for access to the target TS according to the inquiry of the mapping table, to the first NVE (S430).

The first NVE may determine a virtual network identifier (VNID) to use for tunneling for overlay network configuration (S440).

The first NVE may inform the NVA to designate the second NVE as an egress point using the determined VNID (S450), and the NVA may update information for overlay network management using the information received from the first NVE. (S460). That is, when the NVA is informed to configure the overlay network by designating the second NVE as an egress point, the NVA that has received the information may update information for managing the overlay network configuration.

In addition, the NVA may designate the second NVE as an egress point and transmit forwarding information (eg, VNID, destination TS related mapping information) related to configuring the overlay network to the second NVE (S470). Therefore, the second NVE may store and manage the forwarding information received (S480).

Referring to FIG. 5, a process of establishing a path through tunneling using encapsulation and decapsulation for packet transmission based on overlay network, monitoring of available resources in a WAN section located between an ingress NVE and an egress NVE will be described.

After the address advertising procedure is completed, a tunnel mapping procedure and a path setup procedure may be performed.

The NVA may set a path by allowing the tunneling process between the first NVE and the second NVE to be performed using information and a control command for the WAN interval. Here, the information on the WAN section may be information on available resources and available paths in the WAN section, and the control command may be a command for bandwidth and QoS control.

The NVA may select a usage path in the WAN section based on the information on the WAN received from the WAN controller controlling the WAN, and transmit information on the selected usage path to the first NVE.

The NVA may transmit a control command to the first DC controller controlling the first DC, the second DC controller controlling the second DC, and the WAN controller using the selected use path.

The NVA may update the network control management information managed by the network virtualization management apparatus by receiving the result of the control command and the state information of the first DC, the second DC and the WAN according to the control command.

The NVA may command to perform a tunneling process to the first NVE based on the updated network control management information.

Accordingly, the first NVE delivers the encapsulated packet to the second NVE based on the execution command for the tunneling process, and the second NVE decapsulates the encapsulated packet to establish a virtual network configuration with the first NVE. You can set the path.

More detailed description is as follows.

The NVA may request verification and path selection for available resources of the WAN section located between the first NVE and the second NVE through communication with the WAN controller (S510). After selecting an available path of the WAN section based on the status information, information on the available path may be transmitted to the NVA (S511 and S513).

The NVA may select a usage path to be used for overlay network configuration based on the information on the available path received from the WAN controller (S520).

The NVA may transmit a control command to the first DC controller controlling the first DC, the second DC controller controlling the second DC, and the WAN controller using the selected use path (S531, S533, and S535). Here, the control command may be a command for bandwidth and QoS control.

The first DC controller, the second DC controller, and the WAN controller may each perform a corresponding control command in the domain (S541, S543, S545), and then transfer the result and updated status information in the domain to the NVA, respectively ( S551, S553, S555).

The NVA may update the network control management information based on the control command execution result and state information received from the first DC controller, the second DC controller, and the WAN controller (S560).

The NVA may command to perform a tunneling process to the first NVE based on the updated network control management information (S570).

The first NVE may perform encapsulation according to the execution command for the tunneling process (S580). In addition, the first NVE may deliver a packet on which encapsulation is performed to the second NVE (S581).

Accordingly, the second NVE may set a path for configuring a virtual network with the first NVE by decapsulating the packet (S590).

Referring to FIG. 6, a procedure performed by the NVA in conjunction with a WAN controller for selecting a path within a WAN based on available resource information of the underlay network will be described in more detail.

The NVA may make a calculation request for an available path of a WAN section to the WAN controller (S610).

The WAN controller may collect network path information of the available WAN section from the network equipment located below the NVA at the request of the NVA (S611), calculate the available path of the WAN section using the collected information, and then calculate the NVA result. Can be delivered to (S613, S615).

The NVA may select a use path to be used for overlay network configuration based on the received calculation result (S620), and transmit the result and the control command for each path to the WAN controller (S630).

The WAN controller may update the path management information managed by the WAN controller using the selected use path (S640), and then transfer the control command received from the NVA to the corresponding network equipment (S650). The network device may perform the received control command (S651), and transmit the control command execution result to the WAN controller (S653). Here, the control command allows control such as bandwidth and QoS to be performed for each network device.

The WAN controller may receive the control command execution result from the network equipment and transmit the result to the NVA (S657), and at the same time, update management information about the network equipment managed by the WAN controller (S655).

Therefore, the NVA may reflect the result of performing the control command received through the WAN controller in the overlay path setting (S660).

In addition, the NVA may periodically request information on the selected use path and the status of the network equipment through the WAN controller (S670), and the WAN controller may monitor the selected use path and the status of the network equipment according to the request of the NVA. (S671).

In addition, if it is determined that there is a change in the selected use path, the WAN controller changes the use path through the bypass path (S680), and transmits information on the changed path to the NVA (S681) and manages itself at the same time. The management information for the network device may be updated (S680).

Referring to Figure 7, the procedure for the control request between the NVA and the DC controller and the exchange of status information of the lower TS will be described in more detail.

The NVA transmits a DC internal network-related control command to the DC controller (S710), and the DC controller transmits a control command to the TS so that control such as bandwidth and QoS is performed (S711, S713).

When the control is completed, the TS transmits the result to the DC controller (S715), and the DC controller may update management information on the TS by using the received control command execution result (S717).

NVA needs to continuously monitor the status information of the TS located below to play a major role in overlay network configuration.

To this end, the NVA can request TS status information to the DC controller (S720), and the DC controller monitors the operation status (eg, start-up, shutdown, migration, etc.) of the corresponding TS according to the NVA's request. It may be (S730).

The DC controller may update the TS state information using the monitoring result of the operation state of the TS (S740), and transmit the updated TS state information to the NVA (S741).

In addition, the NVA 100 may update a mapping table by using TS state information received from the DC controller (S750).

Referring to FIG. 8, the network virtualization management apparatus 100 according to an embodiment of the present invention includes an NVE interworking unit 110, a mapping table managing unit 120, an overlay network configuration managing unit 130, and a lower controller interworking unit 140. The overlay network path manager 150 and the network control manager 160 may be configured.

The NVE interworking unit 110 may manage channels or protocols for communicating a plurality of NVEs.

The mapping table manager 120 may store and manage a mapping table that stores information about NVE / VNID / TS related to the overlay network configuration.

The overlay network configuration manager 130 may manage and control the

NVEs

210 and 220, the

DC controllers

310 and 320, and the WAN controller 400 constituting the overlay network. In addition, the overlay network configuration manager 130 may allow the mapping table manager 120 to update the mapping table using information received from the

NVEs

210 and 220, the

DC controllers

310 and 320, and the WAN controller 400. Can be.

The lower controller interworking unit 140 may manage a channel or a protocol so as to communicate with a lower controller such as the

DC controllers

310 and 320 and the WAN controller 400.

The overlay network path manager 150 may set and manage an overlay network path based on the underlay network information.

The network control manager 160 may transmit a control command to the

NVEs

210 and 220, the

DC controllers

310 and 320, and the WAN controller 400, and receive and process a result thereof. For example, the network control manager may control and manage bandwidth and QoS of the underlay network.

The method and system for providing an overlay network in connection with an underlay network according to an embodiment of the present invention described above may configure the overlay network based on available resources, network state information, etc. held by the underlay network, thereby improving performance of the overlay network. Can be improved.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims

In the method for providing an overlay-based virtual network between data centers (DCs) connected to a wide area network (WAN),

Confirming, by the network virtualization management device, the accessibility between the source customer system connected to the first network virtualization device included in the first DC and the destination customer system connected to the second network virtualization device included in the second DC;

Transmitting, by the network virtualization management apparatus, the forwarding information obtained in cooperation with the first network virtualization apparatus to the second network virtualization apparatus; And

And setting a path by the network virtualization management apparatus so that a tunneling process between the first network virtualization apparatus and the second network virtualization apparatus is performed by using the information and control command for the WAN interval.

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 1,

Checking the accessibility,

The network virtualization management apparatus updates the mapping table by using mapping information of the source customer system obtained from the first network virtualization apparatus and mapping information of the target customer system obtained from the second network virtualization apparatus. Characterized in that

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 2,

Checking the accessibility,

Characterized in that the first network virtualization device checks whether the source customer system is accessible to the destination customer system using the updated mapping table.

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 2,

The mapping information for the source customer system is mapping information between a virtual access point (VAP) and a virtual network instance (VNI) to which the source customer system is connected.

The mapping information for the target customer system is characterized in that the mapping information between the VAP and VNI to which the target customer system is connected,

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 1,

The forwarding information is,

Contains information about the Virtual Network Identifier (VNID) to use when tunneling for overlay network configuration.

The information on the VNID,

Characterized in that determined by the first network virtualization device based on the mapping information between the second network virtualization device and the target customer system received from the network virtualization management device,

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 1,

Setting the path,

The network virtualization management apparatus selects a usage path in the WAN section based on the information on the WAN received from the WAN controller controlling the WAN, and transfers the information on the selected usage path to the first network virtualization apparatus. Doing; And

Transmitting, by the network virtualization management device, the control command to the first DC controller controlling the first DC, the second DC controller controlling the second DC, and the WAN controller using the selected use path. Characterized by

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 6,

Setting the path,

The network virtualization management apparatus receives the result according to the control command and the state information of the first DC, the second DC and the WAN according to the control command and updates the network control management information managed by the network virtualization management device. Doing; And

The network virtualization management device further comprises the step of performing a command to perform a tunneling process to the first network virtualization device based on the updated network control management information,

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 7,

Setting the path,

Forwarding, by the first network virtualization device, the encapsulated packet to the second network virtualization device based on an execution command for the tunneling process; And

And setting, by the second network virtualization device, the encapsulated packet to encapsulate the encapsulated packet to establish a path for virtual network configuration with the first network virtualization device.

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 6,

The information on the WAN section,

Characterized in that the information on the available resources and available path in the WAN interval,

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 6,

The control command,

Characterized in that the command for the bandwidth and QoS control,

A method of providing an overlay network in conjunction with an underlay network.
A method for providing an overlay-based virtual network between a first data center (DC) connected to a wide area network (WAN) and a second DC, the method comprising:

The network virtualization management apparatus selects a usage path in the WAN section based on the information on the WAN received from the WAN controller controlling the WAN, and includes information on the selected usage path in the first DC. Delivering to a network virtualization device; And

The network virtualization management device transmits a control command for configuring an overlay network to a first DC controller controlling the first DC, a second DC controller controlling the second DC, and the WAN controller using the selected use path. Comprising the steps of:

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 11,

The network virtualization management apparatus receives the result according to the control command and the state information of the first DC, the second DC and the WAN according to the control command and updates the network control management information managed by the network virtualization management device. Doing; And

The network virtualization management device further comprises the step of performing a command to perform a tunneling process to the first network virtualization device based on the updated network control management information,

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 12,

Forwarding, by the first network virtualization device, the encapsulated packet to the second network virtualization device based on an execution command for the tunneling process; And

And setting, by the second network virtualization device, the encapsulated packet to encapsulate the encapsulated packet to establish a path for virtual network configuration with the first network virtualization device.

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 11,

The information on the WAN section,

Characterized in that the information on the available resources and available path in the WAN interval,

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 11,

The control command,

Characterized in that the command for the bandwidth and QoS control,

A method of providing an overlay network in conjunction with an underlay network.
In the method for providing an overlay-based virtual network between data centers (DCs) connected to a wide area network (WAN),

Receiving, by the first network virtualization device, a performance command for the tunneling process from the network virtualization management device;

Delivering, by a first network virtualization device, an encapsulated packet to a second network virtualization device based on a performance command for the tunneling process; And

The second network virtualization device decapsulating the encapsulated packet to establish a path for configuring a virtual network with the first network virtualization device,

Execution command for the tunneling process,

The network virtualization management apparatus selects a use path in the WAN section based on the information on the WAN received from the WAN controller controlling the WAN, and based on the updated network control management information using the selected use path. Characterized in that

A method of providing an overlay network in conjunction with an underlay network.
The method according to claim 16,

The information on the WAN section,

Characterized in that the information on the available resources and available path in the WAN interval,

A method of providing an overlay network in conjunction with an underlay network.