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WO2015060683A1 - Procédé de réalisation d'interfonctionnement de réseaux superposés avec un réseau sous-jacent et système exécutant ledit procédé - Google Patents

Procédé de réalisation d'interfonctionnement de réseaux superposés avec un réseau sous-jacent et système exécutant ledit procédé Download PDF

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Publication number
WO2015060683A1
WO2015060683A1 PCT/KR2014/010065 KR2014010065W WO2015060683A1 WO 2015060683 A1 WO2015060683 A1 WO 2015060683A1 KR 2014010065 W KR2014010065 W KR 2014010065W WO 2015060683 A1 WO2015060683 A1 WO 2015060683A1
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Prior art keywords
network
wan
information
network virtualization
overlay
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PCT/KR2014/010065
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English (en)
Korean (ko)
Inventor
최기만
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KT Corp
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KT Corp
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Priority to CN201480058105.0A priority Critical patent/CN105706394B/zh
Priority to US15/031,533 priority patent/US9838218B2/en
Priority claimed from KR1020140144707A external-priority patent/KR101625297B1/ko
Publication of WO2015060683A1 publication Critical patent/WO2015060683A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/64—Routing or path finding of packets in data switching networks using an overlay routing layer

Definitions

  • 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.
  • 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).
  • NVA network virtualization authority
  • NVE network virtualization edge
  • 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.
  • DC data center
  • 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.
  • the WAN controller 400 is responsible for configuring and controlling the WAN section network equipment 600.
  • 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.
  • 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 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.
  • 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.
  • the first network virtualization apparatus may check whether the source customer system is accessible to the destination customer system using the updated mapping table.
  • 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.
  • VAP virtual access point
  • VNI virtual network instance
  • 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.
  • the forwarding information may include information about a virtual network identifier (VNID) to be used when tunneling for overlay network configuration.
  • VNID virtual network identifier
  • 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.
  • 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.
  • 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.
  • the information on the WAN section may be information on available resources and available paths in the WAN section.
  • control command may be a command for bandwidth and QoS control.
  • 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.
  • DC data center
  • WAN wide area 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
  • 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.
  • 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 overlay-based network virtualization service can be diversified through the efficiency of overlay network performance.
  • FIG. 1 is a conceptual diagram illustrating a general system for providing an overlay network.
  • FIG. 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.
  • FIG. 3 is an exemplary diagram for describing a service discovery procedure for configuring an overlay network according to an embodiment of the present invention.
  • FIG. 4 is an exemplary diagram for describing an address advertising procedure for configuring an overlay network according to an embodiment of the present invention.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • 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.
  • 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.
  • FIG. 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.
  • a method for providing an overlay network in conjunction with an underlay network may include a network virtualization authority (NVA) 100.
  • NVA network virtualization authority
  • the DC controller 310 and 320 and the wide area network (WAN) controlling the data center (DC) are controlled.
  • WAN controller 400 can utilize the network state and operation information of the interval (Intra DC) and inter-DC (Inter DC) section.
  • 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.
  • the first DC controller 310 may control the first DC
  • 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.
  • 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.
  • 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.
  • VNID Virtual Network Identifier
  • 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.
  • 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
  • the WAN controller operates in the first DC and the second DC. It works to control the WAN that connects it.
  • FIG. 3 is an exemplary diagram for describing a service discovery procedure for configuring an overlay network 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).
  • DCs data centers
  • WAN wide area network
  • 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.
  • 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.
  • VAP virtual access point
  • VNI virtual network instance
  • mapping information for the target TS may be mapping information between the VAP and the VNI to which the target TS is connected.
  • 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).
  • VNI Virtaul Network Instance
  • 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.
  • 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).
  • 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.
  • 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).
  • the NVA may update the mapping table using the result of the accessibility to the destination TS received from the second DC controller.
  • 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.
  • FIG. 4 is an exemplary diagram for describing an address advertising procedure for configuring an overlay network according to an embodiment of the present invention.
  • VNID virtual network identifier
  • TS TS
  • an address advertising procedure may be performed.
  • the NVA may transfer forwarding information acquired in association with the first NVE to the second NVE.
  • the forwarding information may include information about a virtual network identifier (VNID) to be used when tunneling for overlay network configuration.
  • VNID virtual network identifier
  • 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.
  • 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).
  • VNID virtual network identifier
  • 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.
  • 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).
  • forwarding information eg, VNID, destination TS related mapping information
  • FIG. 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.
  • 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.
  • 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.
  • the information on the WAN section may be information on available resources and available paths in the WAN section
  • 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.
  • the first NVE delivers the encapsulated packet to the second NVE based on the execution command for the tunneling process
  • the second NVE decapsulates the encapsulated packet to establish a virtual network configuration with the first NVE. You can set the path.
  • 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).
  • 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).
  • the second NVE may set a path for configuring a virtual network with the first NVE by decapsulating the packet (S590).
  • FIG. 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.
  • 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).
  • 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).
  • the NVA may reflect the result of performing the control command received through the WAN controller in the overlay path setting (S660).
  • 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).
  • 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).
  • FIG. 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.
  • 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).
  • 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.
  • 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).
  • the NVA 100 may update a mapping table by using TS state information received from the DC controller (S750).
  • FIG. 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.
  • the network virtualization management apparatus 100 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.
  • 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 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.
  • the overlay-based network virtualization service can be diversified through the efficiency of overlay network performance.

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Abstract

L'invention concerne un procédé et un système destinés à réaliser l'interfonctionnement de réseaux avec un réseau sous-jacent. Le procédé de réalisation d'interfonctionnement de réseaux superposés avec un réseau sous-jacent comporte un procédé de fourniture d'un réseau virtuel à base de superposition entre des centres de données (DC) connectés à un réseau étendu (WAN), le procédé comportant les étapes consistant : à identifier l'accessibilité entre un système client source connecté à un premier dispositif de virtualisation réseau inclus dans un premier DC et un système client objet connecté à un second dispositif de virtualisation inclus dans un second DC, au moyen d'un dispositif de gestion de virtualisation réseau ; à transférer les informations d'acheminement obtenues par interfonctionnement avec le premier dispositif de virtualisation réseau au second dispositif de virtualisation au moyen du dispositif de gestion de virtualisation réseau ; et à configurer un trajet de manière à exécuter un processus en mode tunnel entre le premier dispositif de virtualisation réseau et le second dispositif de virtualisation réseau à l'aide des informations sur une section WAN et une instruction de commande au moyen du dispositif de gestion de virtualisation réseau.
PCT/KR2014/010065 2013-10-24 2014-10-24 Procédé de réalisation d'interfonctionnement de réseaux superposés avec un réseau sous-jacent et système exécutant ledit procédé Ceased WO2015060683A1 (fr)

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CN201480058105.0A CN105706394B (zh) 2013-10-24 2014-10-24 提供与底层网络交互的叠加网络的方法
US15/031,533 US9838218B2 (en) 2013-10-24 2014-10-24 Method for providing overlay network interworking with underlay network and system performing same

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KR10-2013-0127425 2013-10-24
KR20130127425 2013-10-24
KR10-2014-0144707 2014-10-24
KR1020140144707A KR101625297B1 (ko) 2013-10-24 2014-10-24 언더레이 네트워크와 연동하여 오버레이 네트워크를 제공하는 방법 및 이를 수행하는 시스템

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CN107147509A (zh) * 2016-03-01 2017-09-08 中兴通讯股份有限公司 虚拟专用网业务实现方法、装置及通信系统
CN107147509B (zh) * 2016-03-01 2022-03-11 中兴通讯股份有限公司 虚拟专用网业务实现方法、装置及通信系统

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