WO2018196349A1 - Sdn-based system and method for realizing static routing tunnel - Google Patents

Sdn-based system and method for realizing static routing tunnel Download PDF

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Publication number
WO2018196349A1
WO2018196349A1 PCT/CN2017/111554 CN2017111554W WO2018196349A1 WO 2018196349 A1 WO2018196349 A1 WO 2018196349A1 CN 2017111554 W CN2017111554 W CN 2017111554W WO 2018196349 A1 WO2018196349 A1 WO 2018196349A1
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user data
sdn
data transmission
tunnel
destination
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PCT/CN2017/111554
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French (fr)
Chinese (zh)
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陈凯
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烽火通信科技股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • 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
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • 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
    • H04L45/58—Association of routers
    • H04L45/586—Association of routers of virtual routers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/35—Switches specially adapted for specific applications
    • H04L49/354—Switches specially adapted for specific applications for supporting virtual local area networks [VLAN]

Definitions

  • the present invention relates to the field of virtual networks, and in particular, to a system for implementing static route tunneling based on SDN and a method for implementing static route tunneling based on SDN.
  • each branch needs to flexibly establish virtual private lines to facilitate communication and information transmission between branches.
  • the traditional virtual private network establishment mode it is not easy for enterprises to create and deploy virtual private networks. It is necessary to have strict planning and configuration for the virtual private network, which leads to a long service life cycle of the virtual private network.
  • the traditional virtual private network lacks flexibility and cannot establish different virtual private networks for different departments within the enterprise.
  • the traditional virtual private network cannot freely plan routes on the WAN, and cannot provide communication channels across communication carriers. .
  • the present invention aims to provide a system for implementing static route tunneling based on SDN and a method for implementing static route tunneling based on SDN, and accelerate the construction of virtual network and data transmission.
  • the technical solution adopted by the present invention includes:
  • transponders which are respectively deployed in data centers of various regions of the operator;
  • An SDN controller controls a repeater on a link between a data transmission location of the user data and the data destination in the user data transmission service, and establishes a link forwarder between the data transmission destination and the data destination Overlay tunnel.
  • the overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel
  • the SDN controller When the SDN controller detects a link failure in the primary overlay tunnel, the transmission of the user data packet is redirected to the standby overlay tunnel.
  • the multiple forwarders in the overlay tunnel are divided into a source forwarder, one or more intermediate forwarders, and a sink repeater according to the user data transmission direction;
  • the source repeater is configured to encapsulate user data in a user data transmission service into a vxlan message
  • the intermediate forwarder is configured to forward the vxlan message to the sink forwarder
  • the sink repeater is configured to decapsulate the vxlan packet to obtain user data.
  • the SDN controller establishes an overlay tunnel by transmitting a forwarding flow table to a forwarder on a link between the user data transmission destination and the data destination in the user data transmission service.
  • the SDN controller communicates with each of the transponders based on the TCP connection, and the delivery of the forwarding flow table is performed by the openflow protocol.
  • each transponder is based on UDP communication.
  • the present invention also provides a method for implementing a static route tunnel based on SDN, including:
  • S1 the forwarder actively links the SDN controller, and reports its running status to the SDN controller in real time;
  • the SDN controller monitors the link between the forwarders according to the running status reported by the forwarder
  • the SDN controller controls the repeater on the link between the user data transmission destination and the data destination in the user data transmission service, and establishes a link between the data transmission destination and the data destination. Overlay of the repeater Road
  • the overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel.
  • the SDN controller detects that a link fault occurs in the primary overlay tunnel, the transmission of the user data packet is redirected to the standby overlay tunnel.
  • the multiple forwarders in the overlay tunnel are divided into a source forwarder, one or more intermediate forwarders, and a sink repeater according to the direction in which the user data packet is transmitted.
  • the source repeater encapsulates the user data in the user data transmission service into a vxlan message, and sends the encapsulated vxlan message to an intermediate forwarder adjacent to the source forwarder.
  • S502 Forwarding the vxlan message in sequence between the intermediate transponders, and finally forwarding the vxlan message to the sink transponder by the intermediate transponder adjacent to the sink transponder;
  • the sink repeater decapsulates the vxlan message, obtains user data, and sends the user data to the network of the destination.
  • the system of the invention based on SDN realizes static routing tunnel has the advantages of:
  • the SDN controller Based on the control of the SDN controller for multiple transponders, according to the link between the data transmission destination and the data destination in the user data transmission service, the SDN controller uniformly controls the designated transponder to establish an overlay tunnel, and completes virtual inter-regional interconnection.
  • the construction of the network flexibly carries out the construction of the virtual network and improves the transmission efficiency of the virtual line in the wide area network.
  • the repeater is deployed in each data center of each communication carrier. Under the control of the SDN controller, according to the service demand of the user data transmission, the repeaters of each data center are combined into an overlay tunnel to freely plan the route, thereby realizing the cross. Communication carrier-level virtual It is planned to build a private network communication pipeline.
  • the overlay tunnel constructed by the SDN controller includes the main overlay tunnel and the standby overlay tunnel.
  • the SDN controller detects that the main overlay tunnel has a link fault, the user data transmission jumps to the standby overlay tunnel, effectively ensuring user data transmission. Stability.
  • An advantage of the method for implementing static routing tunneling based on SDN is that: according to the sending place and destination of the user data transmission, under the control of the SDN controller, an overlay tunnel through the designated repeater is established to realize the cross of the user data.
  • the area transmission, and the overlay tunnel also includes the standby tunnel.
  • the SDN controller detects the link failure of the main overlay tunnel, the SDN controller detects that the link fault occurs in the main overlay tunnel, and the transmission of the user data jumps to the standby overlay tunnel. The stability of data transmission.
  • FIG. 1 is a schematic structural diagram of a system for implementing a static routing tunnel based on SDN according to the present invention
  • FIG. 2 is a flow chart of a method for implementing a static route tunnel based on SDN according to the present invention.
  • the present invention provides a system for implementing a static routing tunnel based on an SDN (Software Defined Network), which is used to construct a virtual private network and meet user data transmission between users in each branch of an enterprise. , or the transfer of user data between certain users.
  • the system includes an SDN controller and a plurality of repeaters.
  • the SDN controller is deployed in a computer room of a communication carrier, and the repeater is deployed in a data center of each communication carrier in each area.
  • the repeater can also be deployed in a foreign communication operation.
  • the data center of the business because the communication carrier will set the data in different regions. Therefore, the way in which the repeater is arranged in the data center corresponds to the way in which different branch offices of the enterprise are set in different regions, which facilitates the reception and transmission of data between the branch office and the repeater.
  • the SDN controller controls the repeater on the link between the data transmission location of the user data and the data destination in the user data transmission service, and establishes an overlay tunnel through the forwarder on the link between the data transmission destination and the data destination.
  • the overlay tunnel is matched with the transmission service line of the user data.
  • the SDN controller sends an forwarding flow table to the forwarder on the link between the user data transmission destination and the data destination in the user data transmission service to establish an overlay tunnel.
  • the forwarding flow table is used to specify the repeater that constitutes the overlay tunnel.
  • the overlay tunnel is used to transmit user data.
  • the user data is the data that the user needs to transmit through the virtual private network.
  • the user data in the user data transmission service includes the data transmission destination and the data destination.
  • the data center of the destination is designated as the repeater of the data center and the data destination and the data destination.
  • Overlay is a virtualization technology mode superimposed on the network architecture to transmit data frames or packets of a virtual network on a physical network.
  • the system for implementing static routing tunnel based on SDN of the invention the transponders located in data centers of different regions constitute a virtual private network, and the data is sent in the user data transmission service and the data destination, and the transponders dynamically combine to form data.
  • the transmitted link constitutes a virtual private line to satisfy the transmission of user data.
  • the SDN controller communicates with each transponder based on a TCP (Transmission Control Protocol) connection to ensure the reliability of the SDN controller for the transponder control.
  • TCP Transmission Control Protocol
  • Each transponder is based on UDP (User Datagram Protocol). Communication, and the forwarding of the forwarding flow table is performed by the openflow protocol, which is a new type of network protocol commonly used to describe the information interaction between the controller and the switch.
  • the multiple transponders in the overlay tunnel is divided into a source repeater, one or more intermediate repeaters, and a sink repeater, that is, for the repeater that constitutes the overlay tunnel, according to the user data transmission direction.
  • the first repeater is the source repeater
  • the last forwarder is the sink repeater
  • the other repeaters are all intermediate forwarders.
  • the source repeater is configured to encapsulate the user data in the user data transmission service into a vxlan (Virtual Extensible LAN) message.
  • vxlan Virtual Extensible LAN
  • the overlay tunnel needs to be encapsulated by using the vxlan mode, and therefore, is to be performed in the overlay tunnel.
  • the user data to be transmitted needs to be encapsulated into a vxlan message; the intermediate forwarder is used to forward the vxlan message to the sink forwarder; the sink forwarder is used to decapsulate the vxlan message to obtain user data, thereby transmitting the user data to the destination network.
  • the overlay tunnel constructed by the SDN controller includes a primary overlay tunnel and a backup overlay tunnel.
  • the SDN controller detects a link failure in the primary overlay tunnel, the user data transmission jumps to the standby overlay tunnel. .
  • the repeater is deployed in each data center of each communication carrier.
  • the repeaters of each data center can be combined into an overlay tunnel to freely plan routes, thereby realizing virtuality across the carrier carrier level.
  • the construction of the virtual private network across regions can be completed without adding new equipment.
  • the transponders of the data centers of the foreign communication carriers the transponders can be added to the overlay tunnel to meet the application scenarios of international data transmission, and meet the needs of the enterprise application Internet access international link acceleration.
  • the present invention further provides a method for implementing a static routing tunnel based on SDN based on the foregoing SDN-based static routing tunneling system, including:
  • the forwarder actively links the SDN controller, and reports its running status to the SDN controller in real time.
  • the running status includes whether the communication link between the repeater and other transponders is smooth, whether the communication between the transponder and the SDN controller is smooth, and the like. , using real-time reporting
  • the SDN controller can monitor the working status of the transponder in real time;
  • the SDN controller monitors the link between the forwarders according to the running status reported by the forwarder
  • the SDN controller controls the repeater on the link between the user data transmission destination and the data destination in the user data transmission service, and establishes a link between the data transmission destination and the data destination.
  • the overlay tunnel of the upper repeater specifically, the SDN controller sends an forwarding flow table to the forwarder on the link between the user data transmission destination and the data destination in the user data transmission service, thereby establishing an overlay tunnel, which is equivalent to
  • the connection combination of multiple transponders connects the destination of the user data transmission service with the destination area, and sets up a virtual private line, so that the user data arrives at the destination through the logical link formed by the repeater, and completes the virtual specialization. Transmission of data in the network;
  • the overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel.
  • the SDN controller monitors the link fault of the primary overlay tunnel, the SDN controller detects the link fault of the primary overlay tunnel, and the user data transmission jumps to the standby overlay tunnel. The stability of data transmission;
  • S4 User data is transmitted in the overlay tunnel to reach the destination network.
  • the user is divided into a source forwarder, one or more intermediate forwarders, and a sink repeater according to the user data transmission direction. Therefore, the step is specifically as follows:
  • the source forwarder encapsulates the user data packet into a vxlan packet, and sends the encapsulated vxlan packet to an intermediate forwarder adjacent to the source forwarder.
  • S502 Forwarding the vxlan message in sequence between the intermediate transponders, and finally forwarding the vxlan message to the sink transponder by the intermediate transponder adjacent to the sink transponder;
  • the sink forwarder decapsulates the vxlan packet, obtains user data, and sends the user data to the destination network, and completes a virtual private line, and the data is transmitted across the area. Accelerate the transmission of virtual network data in the WAN.
  • an overlay tunnel through the designated repeater is established to implement cross-regional transmission of user data, and the overlay tunnel also includes a standby tunnel, which is in the SDN controller.
  • the SDN controller detects a link failure in the main overlay tunnel, the transmission of user data jumps to the standby overlay tunnel, which effectively ensures the stability of data transmission.

Abstract

The present invention relates to the technical field of virtual networks, and discloses a SDN-based system for realizing a static routing tunnel. The system comprises a plurality of forwarders and a SDN controller; the plurality of forwarders are respectively deployed in data centers located in various regions of an operator; the SDN controller controls a forwarder on a link between a data transmission location and a data destination of user data in a user data transmission service, and establishes an overlay tunnel passing through the forwarder on the link between the data transmission location and the data destination. The present invention further discloses a SDN-based method for realizing a static routing tunnel. The present invention can accelerate the construction of the virtual networks and the transmission of data.

Description

一种基于SDN实现静态路由隧道的系统及方法System and method for implementing static routing tunnel based on SDN 技术领域Technical field
本发明涉及虚拟网络领域，具体涉及一种基于SDN实现静态路由隧道的系统和一种基于SDN实现静态路由隧道的方法。The present invention relates to the field of virtual networks, and in particular, to a system for implementing static route tunneling based on SDN and a method for implementing static route tunneling based on SDN.
背景技术Background technique
对于大型企业，企业的各个分支机构常常处于不同的地域，在如今的信息化时代，各个分支机构间需要灵活建立虚拟专线，以便于各个分支机构间进行通讯以及信息的传输。For large enterprises, the branches of the enterprise are often in different regions. In today's information age, each branch needs to flexibly establish virtual private lines to facilitate communication and information transmission between branches.
对于传统的虚拟专网建立方式，企业创建以及部署虚拟专网较为不易，需对虚拟专网的网路有着严谨的规划和配置，从而导致虚拟专网的业务开展周期较长。同时，传统的虚拟专网缺乏灵活性，无法针对企业内部的不同部门建立不同的虚拟专网，且传统的虚拟专网在广域网上无法自由地规划路由，无法提供跨通信运营商级的通信管道。For the traditional virtual private network establishment mode, it is not easy for enterprises to create and deploy virtual private networks. It is necessary to have strict planning and configuration for the virtual private network, which leads to a long service life cycle of the virtual private network. At the same time, the traditional virtual private network lacks flexibility and cannot establish different virtual private networks for different departments within the enterprise. The traditional virtual private network cannot freely plan routes on the WAN, and cannot provide communication channels across communication carriers. .
发明内容Summary of the invention
针对现有技术中存在的缺陷，本发明的目的在于提供一种基于SDN实现静态路由隧道的系统和一种基于SDN实现静态路由隧道的方法，加快虚拟网络的建设以及数据的传输。In view of the deficiencies in the prior art, the present invention aims to provide a system for implementing static route tunneling based on SDN and a method for implementing static route tunneling based on SDN, and accelerate the construction of virtual network and data transmission.
为达到以上目的，本发明采取的技术方案是，包括：In order to achieve the above object, the technical solution adopted by the present invention includes:
多个转发器，其分别部署于运营商各个地域的数据中心；Multiple transponders, which are respectively deployed in data centers of various regions of the operator;
SDN控制器，所述SDN控制器控制用户数据传输业务中用户数据的数据发送地和数据目的地之间链路上的转发器，建立经过数据发送地和数据目的地之间链路上转发器的overlay隧道。 An SDN controller, the SDN controller controls a repeater on a link between a data transmission location of the user data and the data destination in the user data transmission service, and establishes a link forwarder between the data transmission destination and the data destination Overlay tunnel.
在上述技术方案的基础上，所述overlay隧道包括主overlay隧道和备overlay隧道；On the basis of the foregoing technical solution, the overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel;
当SDN控制器监测到主overlay隧道出现链路故障，用户数据报文的传输跳转到备overlay隧道。When the SDN controller detects a link failure in the primary overlay tunnel, the transmission of the user data packet is redirected to the standby overlay tunnel.
在上述技术方案的基础上，对于overlay隧道中的多个转发器，按用户数据传输方向，分为源转发器、一个或多个中间转发器以及宿转发器；On the basis of the foregoing technical solutions, the multiple forwarders in the overlay tunnel are divided into a source forwarder, one or more intermediate forwarders, and a sink repeater according to the user data transmission direction;
所述源转发器用于将用户数据传输业务中的用户数据封装成vxlan报文；The source repeater is configured to encapsulate user data in a user data transmission service into a vxlan message;
所述中间转发器用于转发vxlan报文至宿转发器；The intermediate forwarder is configured to forward the vxlan message to the sink forwarder;
所述宿转发器用于对vxlan报文解封装，得到用户数据。The sink repeater is configured to decapsulate the vxlan packet to obtain user data.
在上述技术方案的基础上，所述SDN控制器通过向用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器下发转发流表，建立overlay隧道。On the basis of the foregoing technical solution, the SDN controller establishes an overlay tunnel by transmitting a forwarding flow table to a forwarder on a link between the user data transmission destination and the data destination in the user data transmission service.
在上述技术方案的基础上，所述SDN控制器与各个转发器间基于TCP连接进行通讯，且转发流表的下发通过openflow协议进行。On the basis of the above technical solution, the SDN controller communicates with each of the transponders based on the TCP connection, and the delivery of the forwarding flow table is performed by the openflow protocol.
在上述技术方案的基础上，各个转发器间基于UDP通信。Based on the above technical solutions, each transponder is based on UDP communication.
本发明还提供了一种基于SDN实现静态路由隧道的方法，包括：The present invention also provides a method for implementing a static route tunnel based on SDN, including:
S1：转发器主动链接SDN控制器，并向SDN控制器实时上报自身的运行状态；S1: the forwarder actively links the SDN controller, and reports its running status to the SDN controller in real time;
S2：SDN控制器根据转发器上报的运行状态，监控各个转发器间的链路；S2: The SDN controller monitors the link between the forwarders according to the running status reported by the forwarder;
S3：根据用户数据传输业务的线路需求，SDN控制器控制用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器，建立经过数据发送地和数据目的地之间链路上转发器的overlay隧 道；S3: According to the line requirement of the user data transmission service, the SDN controller controls the repeater on the link between the user data transmission destination and the data destination in the user data transmission service, and establishes a link between the data transmission destination and the data destination. Overlay of the repeater Road
S4：用户数据传输业务的用户数据在overlay隧道中传输，到达目的地的网络。S4: User data of the user data transmission service is transmitted in the overlay tunnel to reach the destination network.
在上述技术方案的基础上，所述overlay隧道包括主overlay隧道和备overlay隧道，当SDN控制器监测到主overlay隧道出现链路故障，用户数据报文的传输跳转到备overlay隧道。On the basis of the foregoing technical solution, the overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel. When the SDN controller detects that a link fault occurs in the primary overlay tunnel, the transmission of the user data packet is redirected to the standby overlay tunnel.
在上述技术方案的基础上，对于overlay隧道中的多个转发器，按用户数据报文传输方向，分为源转发器、一个或多个中间转发器以及宿转发器。On the basis of the foregoing technical solution, the multiple forwarders in the overlay tunnel are divided into a source forwarder, one or more intermediate forwarders, and a sink repeater according to the direction in which the user data packet is transmitted.
在上述技术方案的基础上，S5具体为：Based on the above technical solutions, S5 is specifically:
S501：源转发器将用户数据传输业务中的用户数据封装成vxlan报文，并将封装后的vxlan报文发送至与源转发器相邻的中间转发器；S501: The source repeater encapsulates the user data in the user data transmission service into a vxlan message, and sends the encapsulated vxlan message to an intermediate forwarder adjacent to the source forwarder.
S502：各个中间转发器间依次对vxlan报文进行转发，最终与宿转发器相邻的中间转发器将vxlan报文转发至宿转发器；S502: Forwarding the vxlan message in sequence between the intermediate transponders, and finally forwarding the vxlan message to the sink transponder by the intermediate transponder adjacent to the sink transponder;
S503：宿转发器对vxlan报文解封装，得到用户数据，并将用户数据发送至目的地的网络。S503: The sink repeater decapsulates the vxlan message, obtains user data, and sends the user data to the network of the destination.
与现有技术相比，本发明一种基于SDN实现静态路由隧道的系统的优点在于：Compared with the prior art, the system of the invention based on SDN realizes static routing tunnel has the advantages of:
(1)基于SDN控制器对于多个转发器的控制，根据用户数据传输业务中数据发送地和数据目的地间链路，由SDN控制器统一控制指定转发器建立overlay隧道，完成不同地域间虚拟网络的建设，灵活进行虚拟网络的建设，提高虚拟线路在广域网中的传输效率。(1) Based on the control of the SDN controller for multiple transponders, according to the link between the data transmission destination and the data destination in the user data transmission service, the SDN controller uniformly controls the designated transponder to establish an overlay tunnel, and completes virtual inter-regional interconnection. The construction of the network flexibly carries out the construction of the virtual network and improves the transmission efficiency of the virtual line in the wide area network.
(2)转发器部署于各通信运营商的各个数据中心，在SDN控制器的控制下，根据用户数据传输的业务需求，各个数据中心的转发器组合成overlay隧道，自由规划路由，从而实现跨通信运营商级的虚 拟专网通信管道建设。(2) The repeater is deployed in each data center of each communication carrier. Under the control of the SDN controller, according to the service demand of the user data transmission, the repeaters of each data center are combined into an overlay tunnel to freely plan the route, thereby realizing the cross. Communication carrier-level virtual It is planned to build a private network communication pipeline.
(3)SDN控制器所构建的overlay隧道包括主overlay隧道和备overlay隧道，当SDN控制器监测到主overlay隧道出现链路故障，用户数据的传输跳转到备overlay隧道，有效保证用户数据传输的稳定性。(3) The overlay tunnel constructed by the SDN controller includes the main overlay tunnel and the standby overlay tunnel. When the SDN controller detects that the main overlay tunnel has a link fault, the user data transmission jumps to the standby overlay tunnel, effectively ensuring user data transmission. Stability.
本发明一种基于SDN实现静态路由隧道的方法的优点在于：根据用户数据传输的发送地和目的地，在SDN控制器的控制下，建立一条经过指定转发器的overlay隧道，实现用户数据的跨地域传输，同时overlay隧道还包括备用隧道，在SDN控制器对于转发器的实时监测下，当SDN控制器监测到主overlay隧道出现链路故障，用户数据的传输跳转到备overlay隧道，有效保证数据传输的稳定性。An advantage of the method for implementing static routing tunneling based on SDN is that: according to the sending place and destination of the user data transmission, under the control of the SDN controller, an overlay tunnel through the designated repeater is established to realize the cross of the user data. The area transmission, and the overlay tunnel also includes the standby tunnel. When the SDN controller detects the link failure of the main overlay tunnel, the SDN controller detects that the link fault occurs in the main overlay tunnel, and the transmission of the user data jumps to the standby overlay tunnel. The stability of data transmission.
附图说明DRAWINGS
图1为本发明一种基于SDN实现静态路由隧道的系统的结构示意图；1 is a schematic structural diagram of a system for implementing a static routing tunnel based on SDN according to the present invention;
图2为本发明一种基于SDN实现静态路由隧道的方法的流程图。2 is a flow chart of a method for implementing a static route tunnel based on SDN according to the present invention.
具体实施方式detailed description
以下结合附图对本发明作进一步详细说明。The invention will be further described in detail below with reference to the accompanying drawings.
参见图1所示，本发明提供一种基于SDN(Software Defined Network，软件定义网络)实现静态路由隧道的系统，用于构建虚拟专网，满足企业的各个分支机构内用户间的用户数据的传输，或者某些特定用户间的用户数据的传输。该系统包括SDN控制器和多个转发器，SDN控制器部署于通信运营商的机房中，转发器部署于各通信运营商位于各个地域的数据中心，当然，转发器也能够部署于国外通信运营商的数据中心，因通信运营商在不同的地域均会设置数据中 心，故采用转发器在数据中心布置的方式，与企业的不同分支机构设置在不同地域的方式相对应，方便分支机构与转发器间数据的接收和发送。As shown in FIG. 1 , the present invention provides a system for implementing a static routing tunnel based on an SDN (Software Defined Network), which is used to construct a virtual private network and meet user data transmission between users in each branch of an enterprise. , or the transfer of user data between certain users. The system includes an SDN controller and a plurality of repeaters. The SDN controller is deployed in a computer room of a communication carrier, and the repeater is deployed in a data center of each communication carrier in each area. Of course, the repeater can also be deployed in a foreign communication operation. The data center of the business, because the communication carrier will set the data in different regions. Therefore, the way in which the repeater is arranged in the data center corresponds to the way in which different branch offices of the enterprise are set in different regions, which facilitates the reception and transmission of data between the branch office and the repeater.
SDN控制器控制用户数据传输业务中用户数据的数据发送地和数据目的地之间链路上的转发器，建立经过数据发送地和数据目的地之间链路上转发器的overlay隧道，建立的overlay隧道与用户数据的传输业务线路相匹配，具体的，SDN控制器通过向用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器下发转发流表，建立overlay隧道，即转发流表用于指定构成overlay隧道的转发器，overlay隧道用于传输用户数据，用户数据即为用户通过虚拟专网需要传输的数据。用户数据传输业务中的用户数据包含有数据发送地和数据目的地，因此，根据数据发送地和数据目的地间的线路，指定沿途地域的数据中心的转发器，将数据发送地和数据目的地连接，形成overlay隧道，构造用户数据传输的逻辑链路。Overlay是一种网络架构上叠加的虚拟化技术模式，实现在物理网络上传输虚拟网络的数据帧或报文。本发明的基于SDN实现静态路由隧道的系统，位于不同地域数据中心的转发器构成了一个虚拟专网，按照用户数据传输业务中数据发送地和数据目的地，转发器间进行动态组合，形成数据传输的链路，构成虚拟专线，满足用户数据的传输。The SDN controller controls the repeater on the link between the data transmission location of the user data and the data destination in the user data transmission service, and establishes an overlay tunnel through the forwarder on the link between the data transmission destination and the data destination. The overlay tunnel is matched with the transmission service line of the user data. Specifically, the SDN controller sends an forwarding flow table to the forwarder on the link between the user data transmission destination and the data destination in the user data transmission service to establish an overlay tunnel. The forwarding flow table is used to specify the repeater that constitutes the overlay tunnel. The overlay tunnel is used to transmit user data. The user data is the data that the user needs to transmit through the virtual private network. The user data in the user data transmission service includes the data transmission destination and the data destination. Therefore, according to the line between the data transmission destination and the data destination, the data center of the destination is designated as the repeater of the data center and the data destination and the data destination. Connect to form an overlay tunnel to construct a logical link for user data transmission. Overlay is a virtualization technology mode superimposed on the network architecture to transmit data frames or packets of a virtual network on a physical network. The system for implementing static routing tunnel based on SDN of the invention, the transponders located in data centers of different regions constitute a virtual private network, and the data is sent in the user data transmission service and the data destination, and the transponders dynamically combine to form data. The transmitted link constitutes a virtual private line to satisfy the transmission of user data.
SDN控制器与各个转发器间基于TCP(Transmission Control Protocol，传输控制协议)连接进行通讯，保证SDN控制器对于转发器控制的可靠性，各个转发器间基于UDP(User Datagram Protocol，用户数据报协议)通信，且转发流表的下发通过openflow协议进行，openflow协议是一种新型网络协议，常用来描述控制器与交换机之间的信息交互。 The SDN controller communicates with each transponder based on a TCP (Transmission Control Protocol) connection to ensure the reliability of the SDN controller for the transponder control. Each transponder is based on UDP (User Datagram Protocol). Communication, and the forwarding of the forwarding flow table is performed by the openflow protocol, which is a new type of network protocol commonly used to describe the information interaction between the controller and the switch.
对于overlay隧道中的多个转发器，按用户数据报文传输方向，分为源转发器、一个或多个中间转发器以及宿转发器，即对于构成overlay隧道的转发器，按用户数据传输方向，第一个转发器为源转发器，最后一个转发器为宿转发器，其它的转发器全为中间转发器。源转发器用于将用户数据传输业务中的用户数据封装成vxlan(Virtual Extensible LAN，虚拟扩展局域网)报文，在本发明中，overlay隧道需要采用vxlan方式进行封装，因此，对于将要在overlay隧道进行传输的用户数据，需封装成vxlan报文；中间转发器用于转发vxlan报文至宿转发器；宿转发器用于对vxlan报文解封装，得到用户数据，从而将用户数据传输到目的地网络。For the multiple transponders in the overlay tunnel, according to the transmission direction of the user data packet, it is divided into a source repeater, one or more intermediate repeaters, and a sink repeater, that is, for the repeater that constitutes the overlay tunnel, according to the user data transmission direction. The first repeater is the source repeater, the last forwarder is the sink repeater, and the other repeaters are all intermediate forwarders. The source repeater is configured to encapsulate the user data in the user data transmission service into a vxlan (Virtual Extensible LAN) message. In the present invention, the overlay tunnel needs to be encapsulated by using the vxlan mode, and therefore, is to be performed in the overlay tunnel. The user data to be transmitted needs to be encapsulated into a vxlan message; the intermediate forwarder is used to forward the vxlan message to the sink forwarder; the sink forwarder is used to decapsulate the vxlan message to obtain user data, thereby transmitting the user data to the destination network.
为保证用户数据传输的稳定性，SDN控制器所构建的overlay隧道包括主overlay隧道和备overlay隧道，当SDN控制器监测到主overlay隧道出现链路故障，用户数据的传输跳转到备overlay隧道。In order to ensure the stability of the user data transmission, the overlay tunnel constructed by the SDN controller includes a primary overlay tunnel and a backup overlay tunnel. When the SDN controller detects a link failure in the primary overlay tunnel, the user data transmission jumps to the standby overlay tunnel. .
同时，转发器部署于各通信运营商的各个数据中心中，在SDN控制器的控制下，各个数据中心的转发器均能组合成overlay隧道，自由规划路由，从而实现跨通信运营商级的虚拟专网通信管道建设，在原有物理通信线路的情况下，无需添加新设备便能够完成跨地域的虚拟专网的建设。对于设置在国外通信运营商的数据中心的转发器，将该转发器加入到overlay隧道中后，还能满足国际数据传输的应用场景，满足企业应用互联网访问国际链路加速的需求。At the same time, the repeater is deployed in each data center of each communication carrier. Under the control of the SDN controller, the repeaters of each data center can be combined into an overlay tunnel to freely plan routes, thereby realizing virtuality across the carrier carrier level. In the case of the original physical communication line, in the case of the original physical communication line, the construction of the virtual private network across regions can be completed without adding new equipment. For the transponders of the data centers of the foreign communication carriers, the transponders can be added to the overlay tunnel to meet the application scenarios of international data transmission, and meet the needs of the enterprise application Internet access international link acceleration.
参见图2所示，本发明还提供一种基于上述基于SDN实现静态路由隧道的系统的基于SDN实现静态路由隧道的方法，包括：As shown in FIG. 2, the present invention further provides a method for implementing a static routing tunnel based on SDN based on the foregoing SDN-based static routing tunneling system, including:
S1：转发器主动链接SDN控制器，并向SDN控制器实时上报自身的运行状态，运行状态包括转发器与其它转发器间通讯链路是否顺畅、转发器与SDN控制器间通讯是否顺畅等等，采用实时上报的方 式，方便SDN控制器实时对转发器的工作状态进行监控；S1: The forwarder actively links the SDN controller, and reports its running status to the SDN controller in real time. The running status includes whether the communication link between the repeater and other transponders is smooth, whether the communication between the transponder and the SDN controller is smooth, and the like. , using real-time reporting The SDN controller can monitor the working status of the transponder in real time;
S2：SDN控制器根据转发器上报的运行状态，监控各个转发器间的链路；S2: The SDN controller monitors the link between the forwarders according to the running status reported by the forwarder;
S3：根据用户数据传输业务的线路需求，SDN控制器控制用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器，建立经过数据发送地和数据目的地之间链路上转发器的overlay隧道，具体的，SDN控制器通过向用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器下发转发流表，从而建立overlay隧道，相当于通过多个转发器的连接组合将用户数据传输业务的发送地和目的地的地域进行连接，搭建虚拟专线，使得用户数据在发送地，通过转发器形成的逻辑链路，到达目的地，完成虚拟专网中数据的传输；S3: According to the line requirement of the user data transmission service, the SDN controller controls the repeater on the link between the user data transmission destination and the data destination in the user data transmission service, and establishes a link between the data transmission destination and the data destination. The overlay tunnel of the upper repeater, specifically, the SDN controller sends an forwarding flow table to the forwarder on the link between the user data transmission destination and the data destination in the user data transmission service, thereby establishing an overlay tunnel, which is equivalent to The connection combination of multiple transponders connects the destination of the user data transmission service with the destination area, and sets up a virtual private line, so that the user data arrives at the destination through the logical link formed by the repeater, and completes the virtual specialization. Transmission of data in the network;
overlay隧道包括主overlay隧道和备overlay隧道，在SDN控制器对于转发器的实时监控下，当SDN控制器监测到主overlay隧道出现链路故障，用户数据的传输跳转到备overlay隧道，有效保证数据传输的稳定性；The overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel. When the SDN controller monitors the link fault of the primary overlay tunnel, the SDN controller detects the link fault of the primary overlay tunnel, and the user data transmission jumps to the standby overlay tunnel. The stability of data transmission;
S4：用户数据在overlay隧道中传输，到达目的地网络。对于overlay隧道中的多个转发器，按用户数据传输方向，分为源转发器、一个或多个中间转发器以及宿转发器，因此该步骤具体为：S4: User data is transmitted in the overlay tunnel to reach the destination network. For the multiple forwarders in the overlay tunnel, the user is divided into a source forwarder, one or more intermediate forwarders, and a sink repeater according to the user data transmission direction. Therefore, the step is specifically as follows:
S501：源转发器将用户数据报文封装成vxlan报文，并将封装后的vxlan报文发送至与源转发器相邻的中间转发器；S501: The source forwarder encapsulates the user data packet into a vxlan packet, and sends the encapsulated vxlan packet to an intermediate forwarder adjacent to the source forwarder.
S502：各个中间转发器间依次对vxlan报文进行转发，最终与宿转发器相邻的中间转发器将vxlan报文转发至宿转发器；S502: Forwarding the vxlan message in sequence between the intermediate transponders, and finally forwarding the vxlan message to the sink transponder by the intermediate transponder adjacent to the sink transponder;
S503：宿转发器对vxlan报文解封装，得到用户数据，并将用户数据发送至目的地的网络，完成一条虚拟专线中，数据跨地域的传输， 加快虚拟网络数据在广域网中的传输。S503: The sink forwarder decapsulates the vxlan packet, obtains user data, and sends the user data to the destination network, and completes a virtual private line, and the data is transmitted across the area. Accelerate the transmission of virtual network data in the WAN.
根据用户数据传输的发送地和目的地，在SDN控制器的控制下，建立一条经过指定转发器的overlay隧道，实现用户数据的跨地域传输，同时overlay隧道还包括备用隧道，在SDN控制器对于转发器的实时监测下，当SDN控制器监测到主overlay隧道出现链路故障，用户数据的传输跳转到备overlay隧道，有效保证数据传输的稳定性。According to the transmission destination and destination of the user data transmission, under the control of the SDN controller, an overlay tunnel through the designated repeater is established to implement cross-regional transmission of user data, and the overlay tunnel also includes a standby tunnel, which is in the SDN controller. Under the real-time monitoring of the repeater, when the SDN controller detects a link failure in the main overlay tunnel, the transmission of user data jumps to the standby overlay tunnel, which effectively ensures the stability of data transmission.
本发明不局限于上述实施方式，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围之内。本说明书中未作详细描述的内容属于本领域专业技术人员公知的现有技术。 The present invention is not limited to the above embodiments, and those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered as protection of the present invention. Within the scope. The contents not described in detail in the present specification belong to the prior art well known to those skilled in the art.

Claims (10)

  1. 一种基于SDN实现静态路由隧道的系统，其特征在于，包括：A system for implementing a static routing tunnel based on SDN, which is characterized in that:
    多个转发器，其分别部署于运营商各个地域的数据中心；Multiple transponders, which are respectively deployed in data centers of various regions of the operator;
    SDN控制器，所述SDN控制器控制用户数据传输业务中用户数据的数据发送地和数据目的地之间链路上的转发器，建立经过数据发送地和数据目的地之间链路上转发器的overlay隧道。An SDN controller, the SDN controller controls a repeater on a link between a data transmission location of the user data and the data destination in the user data transmission service, and establishes a link forwarder between the data transmission destination and the data destination Overlay tunnel.
  2. 如权利要求1所述的一种基于SDN实现静态路由隧道的系统，其特征在于：A system for implementing static route tunneling based on SDN according to claim 1, wherein:
    所述overlay隧道包括主overlay隧道和备overlay隧道；The overlay tunnel includes a primary overlay tunnel and a backup overlay tunnel;
    当SDN控制器监测到主overlay隧道出现链路故障，用户数据报文的传输跳转到备overlay隧道。When the SDN controller detects a link failure in the primary overlay tunnel, the transmission of the user data packet is redirected to the standby overlay tunnel.
  3. 如权利要求1所述的一种基于SDN实现静态路由隧道的系统，其特征在于：A system for implementing static route tunneling based on SDN according to claim 1, wherein:
    对于overlay隧道中的多个转发器，按用户数据传输方向，分为源转发器、一个或多个中间转发器以及宿转发器；For multiple forwarders in an overlay tunnel, according to the direction of user data transmission, it is divided into a source forwarder, one or more intermediate forwarders, and a sink repeater;
    所述源转发器用于将用户数据传输业务中的用户数据封装成vxlan报文；The source repeater is configured to encapsulate user data in a user data transmission service into a vxlan message;
    所述中间转发器用于转发vxlan报文至宿转发器；The intermediate forwarder is configured to forward the vxlan message to the sink forwarder;
    所述宿转发器用于对vxlan报文解封装，得到用户数据。The sink repeater is configured to decapsulate the vxlan packet to obtain user data.
  4. 如权利要求1所述的一种基于SDN实现静态路由隧道的系统，其特征在于：所述SDN控制器通过向用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器下发转发流表建立overlay隧道。A system for implementing static route tunneling based on SDN according to claim 1, wherein: said SDN controller transmits a forwarder on a link between a user data transmission destination and a data destination in a user data transmission service. The forwarding flow table is delivered to establish an overlay tunnel.
  5. 如权利要求4所述的一种基于SDN实现静态路由隧道的系统，其特征在于：所述SDN控制器与各个转发器间基于TCP连接进行通 讯，且转发流表的下发通过openflow协议进行。A system for implementing a static routing tunnel based on SDN according to claim 4, wherein the SDN controller and each transponder are connected based on a TCP connection. The message is sent and the forwarding flow table is sent through the openflow protocol.
  6. 如权利要求1所述的一种基于SDN实现静态路由隧道的系统，其特征在于：各个转发器间基于UDP通信。A system for implementing static route tunneling based on SDN according to claim 1, wherein each of the repeaters is based on UDP communication.
  7. 一种基于权利要求1所述系统的基于SDN实现静态路由隧道的方法，其特征在于，包括：A method for implementing a static routing tunnel based on SDN according to the system of claim 1 is characterized in that it comprises:
    S1：转发器主动链接SDN控制器，并向SDN控制器实时上报自身的运行状态；S1: the forwarder actively links the SDN controller, and reports its running status to the SDN controller in real time;
    S2：SDN控制器根据转发器上报的运行状态，监控各个转发器间的链路；S2: The SDN controller monitors the link between the forwarders according to the running status reported by the forwarder;
    S3：根据用户数据传输业务的线路需求，SDN控制器控制用户数据传输业务中用户数据发送地和数据目的地之间链路上的转发器，建立经过数据发送地和数据目的地之间链路上转发器的overlay隧道；S3: According to the line requirement of the user data transmission service, the SDN controller controls the repeater on the link between the user data transmission destination and the data destination in the user data transmission service, and establishes a link between the data transmission destination and the data destination. Overlay tunnel on the repeater;
    S4：用户数据传输业务的用户数据在overlay隧道中传输，到达目的地的网络。S4: User data of the user data transmission service is transmitted in the overlay tunnel to reach the destination network.
  8. 如权利要求7所述的一种基于SDN实现静态路由隧道的方法，其特征在于：所述overlay隧道包括主overlay隧道和备overlay隧道，当SDN控制器监测到主overlay隧道出现链路故障，用户数据报文的传输跳转到备overlay隧道。The method for implementing a static routing tunnel based on an SDN according to claim 7, wherein the overlay tunnel includes a primary overlay tunnel and a standby overlay tunnel, and when the SDN controller detects that a link fault occurs in the primary overlay tunnel, the user The transmission of data packets jumps to the standby overlay tunnel.
  9. 如权利要求7所述的一种基于SDN实现静态路由隧道的方法，其特征在于：对于overlay隧道中的多个转发器，按用户数据报文传输方向，分为源转发器、一个或多个中间转发器以及宿转发器。The method for implementing a static routing tunnel based on an SDN according to claim 7, wherein the plurality of repeaters in the overlay tunnel are divided into a source repeater and one or more according to a user data packet transmission direction. Intermediate repeater and sink repeater.
  10. 如权利要求9所述的一种基于SDN实现静态路由隧道的方法，其特征在于，S5具体为：The method for implementing a static routing tunnel based on an SDN according to claim 9, wherein the S5 is specifically:
    S501：源转发器将用户数据传输业务中的用户数据封装成vxlan 报文，并将封装后的vxlan报文发送至与源转发器相邻的中间转发器；S501: The source forwarder encapsulates user data in the user data transmission service into vxlan The packet is sent to the intermediate transponder adjacent to the source transponder;
    S502：各个中间转发器间依次对vxlan报文进行转发，最终与宿转发器相邻的中间转发器将vxlan报文转发至宿转发器；S502: Forwarding the vxlan message in sequence between the intermediate transponders, and finally forwarding the vxlan message to the sink transponder by the intermediate transponder adjacent to the sink transponder;
    S503：宿转发器对vxlan报文解封装，得到用户数据，并将用户数据发送至目的地的网络。 S503: The sink repeater decapsulates the vxlan message, obtains user data, and sends the user data to the network of the destination.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115776441A (en) * 2023-02-13 2023-03-10 北京天弛网络有限公司 SDN-based virtual private line service issuing method, device, medium and electronic equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3745659A4 (en) 2018-02-13 2020-12-09 Huawei Technologies Co., Ltd. Routing method and apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105991387A (en) * 2015-01-29 2016-10-05 杭州华三通信技术有限公司 Message transformation method and device of virtual extensible local area network (VXLAN)
CN106302076A (en) * 2016-07-22 2017-01-04 浪潮(北京)电子信息产业有限公司 Set up the method in VXLAN tunnel, system and SDN controller
CN106330649A (en) * 2015-06-18 2017-01-11 杭州华三通信技术有限公司 Data packet forwarding method and apparatus of cross software-defined network
US20170019331A1 (en) * 2015-07-13 2017-01-19 Futurewei Technologies, Inc. Internet Control Message Protocol Enhancement for Traffic Carried by a Tunnel over Internet Protocol Networks

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105991387A (en) * 2015-01-29 2016-10-05 杭州华三通信技术有限公司 Message transformation method and device of virtual extensible local area network (VXLAN)
CN106330649A (en) * 2015-06-18 2017-01-11 杭州华三通信技术有限公司 Data packet forwarding method and apparatus of cross software-defined network
US20170019331A1 (en) * 2015-07-13 2017-01-19 Futurewei Technologies, Inc. Internet Control Message Protocol Enhancement for Traffic Carried by a Tunnel over Internet Protocol Networks
CN106302076A (en) * 2016-07-22 2017-01-04 浪潮(北京)电子信息产业有限公司 Set up the method in VXLAN tunnel, system and SDN controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115776441A (en) * 2023-02-13 2023-03-10 北京天弛网络有限公司 SDN-based virtual private line service issuing method, device, medium and electronic equipment
CN115776441B (en) * 2023-02-13 2023-04-28 北京天弛网络有限公司 SDN-based virtual private line service issuing method and device, medium and electronic equipment

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