WO2021088192A1 - 一种sd-wan网络中路由信息分发和更新的方法及控制器 - Google Patents

一种sd-wan网络中路由信息分发和更新的方法及控制器 Download PDF

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WO2021088192A1
WO2021088192A1 PCT/CN2019/124186 CN2019124186W WO2021088192A1 WO 2021088192 A1 WO2021088192 A1 WO 2021088192A1 CN 2019124186 W CN2019124186 W CN 2019124186W WO 2021088192 A1 WO2021088192 A1 WO 2021088192A1
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network
routing information
routing
information
wan
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PCT/CN2019/124186
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English (en)
French (fr)
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蔡多多
赵梓森
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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
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/12—Discovery or management of network topologies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/34—Signalling channels for network management communication
    • H04L41/342—Signalling channels for network management communication between virtual entities, e.g. orchestrators, SDN or NFV entities
    • 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
    • H04L45/02—Topology update or discovery

Definitions

  • the invention relates to the field of routing controllers, in particular to a method and controller for routing information distribution and updating in an SD-WAN network.
  • SDN Software Defined Network
  • NFV Network Function Virtualization
  • the SDN controller completes configuration distribution, routing planning, and network optimization. It needs to rely on southbound protocols (such as Netconf) and routing models (such as Yang defined models) to collect routing information, and complete SD-WAN (Software Defined Wide Area Network, wide area software) Defining the network) business management in the network.
  • the SD-WAN controller acts as the control plane of the network, connects to the network equipment, and conducts unified management of the network equipment.
  • a unified routing planning module is needed to carry out the routing distribution of different tenant VPN (Virtual Private Network, virtual private network) to solve the routing management of the entire network in the SD-WAN scenario;
  • tenant VPN Virtual Private Network, virtual private network
  • the device acting as the BGP (Border Gateway Protocol) route reflector is connected to the controller, which will increase the connection burden of the controller and increase the network traffic and equipment cost;
  • the purpose of the present invention is to provide a method for distributing and updating routing information in an SD-WAN network, which provides and uses a controller that adopts a general configuration model to manage the SD-WAN network At the same time as the equipment, it establishes a southbound channel with the network equipment, collects network routing information, and centralizes planning for the deployment and optimization of SD-WAN network services.
  • a method for routing information distribution and update in SD-WAN network including:
  • the SD-WAN controller After the SD-WAN controller is connected to the SD-WAN network, it collects all the routing information of the SD-WAN network, and stores the SD-WAN network-wide routing information, the routing information sent to the device, and the routing information associated with the network separately; users When establishing a network service, the controller, according to the network identification and routing prefix in the routing model, delivers routing information as needed to the associated equipment of the network service, as well as the corresponding relationship between the storage network and the associated equipment, and refreshes the information that has been issued to the associated equipment. The mapping relationship between the routing information of the device and the network.
  • the controller After the controller establishes a connection with the device, it collects all routing information of the SD-WAN network, and stores all routing information in the full routing information table of the controller according to the device identification. When updating, update the full routing information table.
  • the specific steps of the controller to collect the routing information of the SD-WAN network are: the associated device actively pushes the updated routing information after the routing information changes; the controller refreshes the full amount when it listens to the device routing update event Routing information table.
  • the controller when the user establishes a network service, the controller sends part of the routing information to the associated device as needed according to the network identifier and routing prefix, and the corresponding relationship between the storage network and the device specifically includes:
  • the associated device information is stored in the network associated device routing information storage table; combined with the network routing prefix, the routing information is issued to the associated device on demand, and the routing information issued to the associated device is stored in the associated device
  • the distributed routing information storage table the southbound protocol is adopted to distribute the routing information to the corresponding associated equipment.
  • it also includes: when a user deletes a network service, delete the corresponding information stored in the routing information storage table of the network-associated device; according to the associated device information and network identification, use the southbound protocol to configure the delete from the device. Corresponding routing information issued; delete the stored routing information issued to the associated device from the issued routing information storage table.
  • the controller collects the associated device routing information update, it updates the storage information in the full routing information table; the network information storage module finds the related device information according to the network associated device routing information storage table, and then through The distributed routing storage module searches the distributed routing information storage table, updates the corresponding routing information, and uses the southbound protocol configuration distribution module to update the corresponding routing configuration on the device.
  • a unified routing information model based on the Yang model is established; in the subsequent process, configuration and routing information are set based on the unified routing information model.
  • the present invention also provides an SD-WAN controller, including:
  • the business system is used to collect the routing information of the SD-WAN network according to the routing model
  • Storage system used to store SD-WAN network-wide routing information, routing information issued to devices, and routing information associated with the network;
  • the protocol system is used to deliver the correspondence between some routing information and the storage network and the device to the associated device as needed according to the network identifier and routing prefix, as well as the routing configuration information delivered by the centralized controller to the device.
  • the service system includes a network management module, a route planning module, and a route distribution module.
  • the network management module is used to create and manage network services
  • the route planning module is used to create and manage network services based on the established network information.
  • the routing distribution module is used to distribute routing information to devices connected to the controller;
  • the storage system includes a full routing storage module, a distributed routing storage module, and a network information storage module, the full routing
  • the storage module is used to store the entire network routing information
  • the issued routing storage module is used to store routing information issued to the device
  • the network information storage module is used to store the mapping relationship between the network and the device;
  • the protocol system includes protocols
  • the configuration delivery module is used to deliver the corresponding relationship between part of the routing information and storage network and equipment to the associated device as needed according to the network identification and routing prefix, as well as the routing configuration information delivered by the centralized controller to the device; also includes events System, the event system is used to monitor device routing changes and refresh the mapping relationship between the routing information issued by the device and the network, and notify the other devices.
  • the event system is also used to notify the full routing storage module to update the storage information of the full routing information table when the routing information update is monitored;
  • the network information storage module is also used to store the table according to the network associated equipment Find the relevant device information;
  • the distribution routing storage module is also used to look up the distribution routing information table, update the corresponding routing information, and at the same time use the southbound protocol configuration distribution module to update the corresponding routing configuration on the device.
  • the SD-WAN controller in the system for routing information distribution and update in the SD-WAN network of the present invention adopts a general configuration model to establish a southbound channel with the network equipment while managing the SD-WAN network equipment , Collect network routing information, centrally plan for the deployment and optimization of SD-WAN network services.
  • the SD-WAN controller acts as a control plane to establish a connection with the equipment, centrally manage the equipment, collect SD-WAN network routing information and update it in time, Let the device only be responsible for forwarding and improve data forwarding performance.
  • the full amount of routing information involved is distinguished according to the device. Compared with the existing route reflector, there is no distinguishing related information, and only all routes are placed in the device.
  • the method of the present invention can be used to report routes according to the device classification.
  • the route source can be traced, the device and route information associated with network services can be managed in a detailed manner, and more refined business control can be achieved.
  • the controller centrally manages the entire network. Routing and planning can separate the control plane from the device. The device does not perform routing control, but only forwards data according to the received route.
  • the method for distributing and updating routing information in the SD-WAN network of the present invention separately stores and processes network-associated device information. Commonly used route reflectors do not have this model; by associating services and devices, services, devices, and locations can be realized. The mapping that requires routing can quickly perform related data query and logical processing when the business is updated.
  • Figure 1 is a schematic diagram of the overall architecture of an SD-WAN network routing information distribution and update controller system in an embodiment of the present invention
  • FIG. 2 is a schematic diagram of routing information update and maintenance of the SD-WAN network routing information distribution and update controller system storage system in an embodiment of the present invention
  • Fig. 3 is a flowchart of a method for distributing and updating SD-WAN network routing information in an embodiment of the present invention.
  • the embodiment of the present invention provides an SD-WAN controller, including: a business system, a storage system, and a protocol system.
  • the business system is used to collect the routing information of the SD-WAN network according to the routing model
  • the storage system is used to store the SD-WAN network-wide routing information, the routing information issued to the equipment and the routing information associated with the network
  • the protocol system is used to Network identifiers and routing prefixes, as needed, the corresponding relationship between some routing information and storage networks and devices, as well as the routing configuration information issued by the centralized controller to the devices, are issued to the associated devices as needed.
  • the business system may include a network management module, a route planning module, and a route distribution module.
  • the network management module is used to create and manage For network services, the routing distribution module is used to distribute routing information to devices connected to the controller; the storage system may include a full routing storage module, a distributed routing storage module, and a network information storage module.
  • the full routing storage module is used to store all routing information.
  • the issued routing storage module is used to store routing information issued to the device, and the network information storage module is used to store the mapping relationship between the network and the device;
  • the protocol system may include a protocol configuration issuing module for According to the network identification and routing prefix, the corresponding relationship between part of the routing information and the storage network and the device, as well as the routing configuration information issued by the centralized controller to the device, is issued to the associated device as needed;
  • an event system can also be set up.
  • the event system is used to monitor device routing changes and refresh the mapping relationship between the routing information sent by the device and the network, and notify other devices.
  • the present invention also provides a method for distributing and updating routing information in an SD-WAN network, which utilizes the above SD-WAN controller, and the method includes:
  • the main feature of the routing model of the present invention is that the full amount of routing information is differentiated according to the equipment, so that after the routing is reported according to the equipment distinction, the source of the routing can be traced, and the equipment and routing information associated with network services can be managed in detail.
  • the controller centrally manages the entire network routing and planning, which can separate the control plane from the device.
  • the device does not perform routing control, and only uses the received route for data forwarding;
  • the second aspect is in the routing model Specially design the routing information sent to the device on demand. This setting allows the controller to record the routing information sent to the device, which is the necessary routing information issued according to specific services to achieve on-demand routing distribution;
  • third aspect The routing model specifically designs network-associated device information, in which services and devices are associated to realize the mapping of services, devices, and required routes. When services are updated, relevant data queries and logical processing can be quickly performed.
  • the attributes of the designed routing model are as follows:
  • Source which can also be the source network segment, describes the source network information 2
  • Destination can also be the destination network segment, describing the destination network information 3
  • Next Hop The next hop address of the route, generally the gateway address 4 Output Interface Exit information, exit information to the next hop
  • DestDeviceID The unique identifier of the device that needs to deliver routing information 2 SrcDeviceID The unique identifier of the device where the controller collects this piece of routing information 3 Network Tag Network unique identifier 4 Network Prefix The routing prefix received by the network 5 List ⁇ route-info> The routing information sent by the controller to the device
  • the routing information of the SD-WAN network is collected, and the routing information of the entire SD-WAN network, the routing information issued to the device, and the routing information associated with the network are stored separately; in one embodiment ,
  • the specific steps for the controller to collect the routing information of the SD-WAN network are: after the device routing information changes, it actively pushes the updated routing information; when the event monitoring system of the controller monitors the device routing update event, it refreshes the full routing in the storage system information.
  • the controller When a user establishes a network service, the controller sends part of the routing information to the storage network and the device's correspondence as needed according to the network identification and routing prefix in the routing model, and refreshes the routing information and network information that the device has issued. Mapping relations.
  • a feasible solution for the above process is: when the user establishes a service, the involved device information is stored in the full routing information storage table; the service routing is planned within the network according to the established network information, and combined
  • the network routing prefix delivers routing information to the device on demand, and stores the routing information delivered to the device in the device delivered routing information storage table; the southbound protocol is used to deliver the routing information to the corresponding device.
  • the controller connection system After the controller connection system establishes a connection with the device, it collects the routing information of the SD-WAN network, and stores the routing information in the full routing information table of the controller according to the device identification. When the device routing is updated, the full routing information table is updated .
  • the method of the present invention also provides corresponding routing distribution and update logic:
  • the controller collects the routing information reported by the device through the event monitoring module to be deleted, and informs the full routing storage module to delete the corresponding information stored in the full routing information storage table; the network information storage module is based on the network association
  • the device storage table looks up the relevant device information, and then searches the device's issued routing information storage table through the issued routing storage module, and deletes the corresponding stored routing information from the issued routing information storage table according to the involved device information and network identification.
  • the routing information issued to the device at the same time, the southbound protocol configuration is used to delete the corresponding routing information that has been issued from the device;.
  • the controller When the user updates the network, that is, when the controller collects the device routing information update through the event monitoring module, it notifies the full routing storage module to update the storage information in the full routing information table; the network information storage module finds it according to the routing information storage table of the network-associated equipment The relevant device information is then searched for the issued routing information storage table through the issued routing storage module, and the corresponding routing information is updated.
  • the southbound protocol configuration issuing module is used to update the corresponding routing configuration on the device.
  • the controller monitors the events reported by the device routing, maintains the controller routing information and issues configuration information in real time, to ensure the accurate reachability of the network routing; the controller collects the entire network routing information, and based on the user network identification and The routing prefix is used for routing planning and distribution to quickly establish services.

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Abstract

本发明公开了一种SD-WAN网络中路由信息分发和更新方法及控制器，涉及控制器和路由领域，包括在SD-WAN控制器接入SD-WAN网络后，收集路由信息，将全网路由信息、下发到设备的路由信息以及网络关联的路由信息分别存储；用户建立业务时，控制器根据网络标识和路由前缀，按需给关联的设备下发部分路由信息，存储网络和设备的对应关系，并刷新路由信息和网络的映射关系。本发明的SD-WAN网络中路由信息分发和更新的方法中SD-WAN控制器作为控制面与设备建立连接，集中管理设备，收集SD-WAN网络路由信息并及时更新，让设备仅仅负责转发，提高数据转发性能。

Description

一种SD-WAN网络中路由信息分发和更新的方法及控制器 技术领域
本发明涉及路由控制器领域，具体涉及一种SD-WAN网络中路由信息分发和更新的方法及控制器。
背景技术
随着虚拟化、云计算、大数据、SDN(Software Defined Network，软件定义网络)/NFV(Network Function Virtualization，网络功能虚拟化)等网络技术的发展，服务器的应用需求多样化，终端用户业务可定制化急剧增长。传统网络已经无法满足资源灵活调度，业务定制化部署和应用快速上线，SDN网络技术应运而生，将网络控制平面和数据平面分离，动态调整网络配置，为业务提供敏捷的网络支持。
SDN控制器完成配置下发、路由规划和网络优化，需要依赖南向协议(例如Netconf)、路由模型(例如Yang定义模型)收集路由信息，完成SD-WAN(Software Defined Wide Area Network，广域软件定义网络)网络中的业务管理。SD-WAN控制器作为网络的控制平面，连接网络设备，对网络设备进行统一的管理。
当前WAN(Wide Area Network，广域网)网络向SD-WAN网络演进过程中，还存在以下问题：
1、当前WAN网络朝SD-WAN演进中，需要统一的路由规划模块，进行不同租户VPN(Virtual Private Network，虚拟专用网络)的路由分配，解决SD-WAN场景下全网的路由管理；
2、WAN网络中，担当BGP(Border Gateway Protocol，边界网 关协议)路由反射器的设备与控制器连接，会添加控制器的连接负担，以及增加网络流量和设备成本；
3、目前路由反射器下所有的客户端属于对等体，对它们统一进行相同的处理，无法差异化处理。
发明内容
针对现有技术中存在的缺陷，本发明的目的在于提供一种SD-WAN网络中路由信息分发和更新的方法，其中提供和使用了一种控制器采用通用配置模型，在管理SD-WAN网络设备的同时，和网络设备之间建立南向通道，收集网络路由信息，集中规划，用于SD-WAN网络业务部署和优化。
为达到以上目的，本发明采取的技术方案是：
一种SD-WAN网络中路由信息分发和更新的方法，包括：
在SD-WAN控制器接入SD-WAN网络后，收集SD-WAN网络的所有路由信息，将SD-WAN全网路由信息、下发到设备的路由信息以及网络关联的路由信息分别存储；用户建立网络业务时，控制器根据路由模型中的网络标识和路由前缀，按需给网络业务的关联设备下发路由信息，以及下发存储网络和关联设备的对应关系，并刷新已下发给关联设备的路由信息和网络的映射关系。
在上述技术方案的基础上，所述控制器与设备建立连接后，收集SD-WAN网络的所有路由信息，并将所有路由信息按照设备标识存储在控制器的全量路由信息表中，当设备路由更新时，更新全量路由信息表。
在上述技术方案的基础上，控制器收集SD-WAN网络的路由信息具体步骤为：关联设备在路由信息变化后，主动推送更新的路由信息；控制器在监听到设备路由更新事件时，刷新全量路由信息表。
在上述技术方案的基础上，所述用户建立网络业务时，控制器根据网络标识和路由前缀，按需给关联的设备下发部分路由信息，存储网络和设备的对应关系具体包括：
所述用户建立业务时，将关联设备信息，存入网络关联设备路由信息存储表；结合网络路由前缀向关联设备按需下发路由信息，并将下发至关联设备的路由信息存储到关联设备的已下发路由信息存储表；采用南向协议将路由信息下发至对应的关联设备中。
在上述技术方案的基础上，还包括：用户删除网络业务时，删除网络关联设备路由信息存储表中存储的对应信息；根据关联设备信息及网络标识，采用南向协议配置从设备上删除已下发的对应路由信息；从已下发路由信息存储表中删除存储的下发至关联设备的路由信息。
在上述技术方案的基础上，当控制器收集到关联设备路由信息更新时，更新全量路由信息表内的存储信息；网络信息存储模块根据网络关联设备路由信息存储表找到有关的设备信息，然后通过下发路由存储模块查找已下发路由信息存储表，更新对应的路由信息，同时采用南向协议配置下发模块更新设备上对应的路由配置。
在上述技术方案的基础上，还包括：
在SD-WAN控制器接入SD-WAN网络前，建立基于Yang模型的统一路由信息模型；在后续过程中，基于所述统一路由信息模型设置配置和路由信息。
本发明还提供一种SD-WAN控制器，包括：
业务系统，用于根据路由模型收集SD-WAN网络的路由信息；
存储系统，用于存储SD-WAN全网路由信息、下发到设备的路由信息以及网络关联的路由信息；
协议系统，用于根据网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，以及集中控制器给设备下发的路由配置信息。
在上述技术方案的基础上，所述业务系统包括网络管理模块、路由规划模块和路由分发模块，所述网络管理模块用于创建和管理网络业务，所述路由规划模块用于根据建立的网络信息在网络范围内规划业务路由，所述路由分发模块用于向控制器连接的设备分发路由信息；所述存储系统包括全量路由存储模块、下发路由存储模块和网络信息存储模块，所述全量路由存储模块用于存储全网路由信息，所述下发路由存储模块用于存储下发至设备的路由信息，所述网络信息存储模块用于存储网络和设备的映射关系；所述协议系统包括协议配置下发模块，用于根据网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，以及集中控制器给设备下发的路由配置信息；还包括事件系统，所述事件系统用于监听设备路由变化并刷新设备已下发路由信息和网络的映射关系，通告至其余设备。
在上述技术方案的基础上，所述事件系统还用于在监测到路由信息更新时，通知全量路由存储模块更新全量路由信息表的存储信息；网络信息存储模块还用于根据网络关联设备存储表找到有关的设备信息；下发路由存储模块还用于查找下发路由信息表，更新对应的路由信息，同时采用南向协议配置下发模块更新设备上对应的路由配置。
与现有技术相比，本发明的优点在于：
(1)本发明的SD-WAN网络中路由信息分发和更新的系统中的SD-WAN控制器，采用通用配置模型，在管理SD-WAN网络设备的 同时，和网络设备之间建立南向通道，收集网络路由信息，集中规划用于SD-WAN网络业务部署和优化，整个过程中SD-WAN控制器作为控制面与设备建立连接，集中管理设备，收集SD-WAN网络路由信息并及时更新，让设备仅仅负责转发，提高数据转发性能。
(2)本发明的SD-WAN网络中路由信息分发和更新的方法中对涉及的全量路由信息按照设备做了区分，相对于现有路由反射器中没有区分相关信息，仅将所有路由在设备间进行扩散即可的做法，本发明方法按照设备区分上报路由之后，可以追溯路由来源，细化管理网络业务关联的设备及路由信息，可以实现更精细的业务控制，另外控制器集中管理全网路由及规划，可以将控制面从设备中分离，设备不进行路由控制，只用按照接收的路由进行数据转发。
(3)本发明的SD-WAN网络中路由信息分发和更新的方法单独存储和处理网络关联设备信息，常用路由反射器没有该模型；通过将业务和设备进行关联，可以实现业务、设备、所需路由的映射，在业务进行更新时，可以快速的进行有关数据查询及逻辑处理。
附图说明
图1为本发明实施例中SD-WAN网络路由信息分发和更新控制器系统总体架构示意图；
图2为本发明实施例中SD-WAN网络路由信息分发和更新控制器系统存储系统的路由信息更新及维护示意图；
图3为本发明实施例中SD-WAN网络路由信息分发和更新方法的流程图。
具体实施方式
以下结合附图及实施例对本发明作进一步详细说明。
本发明实施例提供一种SD-WAN控制器，包括：业务系统，存储系统，协议系统。其中，业务系统用于根据路由模型收集SD-WAN网络的路由信息；存储系统用于存储SD-WAN全网路由信息、下发到设备的路由信息以及网络关联的路由信息；协议系统用于根据网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，以及集中控制器给设备下发的路由配置信息。
参见图1所示，在本发明方案的一种具体实施方案中，为完善各功能的具体实现，业务系统可包括网络管理模块、路由规划模块和路由分发模块，网络管理模块用于创建和管理网络业务，所述路由分发模块用于向控制器连接的设备分发路由信息；存储系统可包括全量路由存储模块、下发路由存储模块和网络信息存储模块，所述全量路由存储模块用于存储全网路由信息，所述下发路由存储模块用于存储下发至设备的路由信息，所述网络信息存储模块用于存储网络和设备的映射关系；协议系统可包括协议配置下发模块，用于根据网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，以及集中控制器给设备下发的路由配置信息；
同时，还可设置事件系统，事件系统用于监听设备路由变化并刷新设备已下发路由信息和网络的映射关系，通告至其余设备。
本发明同时还提供一种SD-WAN网络中路由信息分发和更新的方法，其利用上述SD-WAN控制器，该方法包括：
建立SD-WAN控制器和路由模型；在建立路由模型时，根据SD-WAN网络应用，以及业务路由抽象，设计简单通用的路由信息模型，且考虑业务和存储解耦及可扩展性，设计独立的数据存储，用于控制器存储全网路由信息、按需分发到设备的路由信息以及网络关联设备路由信息。为达到本发明目的，本发明路由模型的主要特点一是 全量路由信息按照设备做了区分，这样按照设备区分上报路由之后，可以追溯路由来源，细化管理网络业务关联的设备及路由信息，可以实现更精细的业务控制，另外控制器集中管理全网路由及规划，可以将控制面从设备中分离，设备不进行路由控制，只用按照接收的路由进行数据转发；第二方面该路由模型中专门设计按需下发到设备的路由信息，这种设置可使控制器记录下发至设备的路由信息，是按照具体业务下发的必备路由信息，达到按需进行路由分发；第三方面该路由模型中专门设计网络关联设备信息，其中将业务和设备进行关联，可以实现业务、设备、所需路由的映射，在业务进行更新时，可以快速的进行有关数据查询及逻辑处理。
本发明一个可行的实施方案中，设计的路由模型属性如下：
序号 属性 描述
1 Source 源地址，也可以为源网段，描述源网络信息
2 Destination 目的地址，也可以为目的网段，描述目的网络信息
3 Next Hop 路由下一跳地址，一般为网关地址
4 Output Interface 出口信息，到下一跳的出口信息
设计的全量路由信息：
序号 属性 描述
1 DeviceID 设备唯一标识
2 List<route-info> 设备上报的路由列表
设计的按需下发到设备的路由信息：
序号 属性 描述
1 DestDeviceID 需要下发路由信息的设备唯一标识
2 SrcDeviceID 控制器收集该条路由信息的设备唯一标识
3 Network Tag 网络唯一标识
4 Network Prefix 网络接收的路由前缀
5 List<route-info> 控制器下发到该设备的路由信息
设计的网络关联设备信息：
序号 属性 描述
1 Network Tag 网络唯一标识
2 List<DeviceID> 该网络关联的设备ID列表
在控制器接入SD-WAN网络后，收集SD-WAN网络的路由信息，将SD-WAN全网路由信息、下发到设备的路由信息以及网络关联的路由信息分别存储；在一个实施例中，控制器收集SD-WAN网络的路由信息具体步骤为：设备路由信息变化后，主动推送更新的路由信息；控制器的事件监听系统在监听到设备路由更新事件时，刷新存储系统中的全量路由信息。
用户建立网络业务时，控制器根据路由模型中的网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，并刷新设备已下发路由信息和网络的映射关系。在一个实施例中，上述过程的可行方案为：所述用户建立业务时，将涉及到的设备信息，存入全量路由信息存储表；根据建立的网络信息在网络范围内规划业务路由，，结合网络路由前缀向设备按需下发路由信息，并将下发至设备的路由信息存储到设备已下发路由信息存储表；采用南向协议将路由信息下发至对应的设备中。
控制器连接系统与设备建立连接后，收集SD-WAN网络的路由信息，并将所述路由信息按照设备标识存储在控制器的全量路由信息表中，当设备路由更新时，更新全量路由信息表。
针对具体应用场景的不同，本发明方法还提供了相应的路由分发和更新逻辑：
具体的，在用户删除网络业务时，控制器通过事件监听模块收集到设备上报的路由信息被删除，通知全量路由存储模块删除全量路由信息存储表中存储的对应信息；网络信息存储模块根据网络关联设备存储表查找相关的设备信息，随后通过下发路由存储模块查找设备已 下发路由信息存储表，根据涉及的设备信息及网络标识，从已下发路由信息存储表中删除对应的已存储的下发至设备的路由信息；同时采用南向协议配置从设备上删除已下发的对应路由信息；。
在用户更新网络时，即当控制器通过事件监听模块收集到设备路由信息更新时，通知全量路由存储模块更新全量路由信息表内的存储信息；网络信息存储模块根据网络关联设备路由信息存储表找到有关的设备信息，然后通过下发路由存储模块查找已下发路由信息存储表，更新对应的路由信息，同时采用南向协议配置下发模块更新设备上对应的路由配置。
因此，通过上述过程，控制器监听设备路由上报的事件，实时维护控制器路由信息及下发配置信息，确保网络路由的准确可达性；控制器收集全网路由信息，并根据用户网络标识和路由前缀进行路由规划及分发，快速建立业务。
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。

Claims (10)

  1. 一种SD-WAN网络中路由信息分发和更新的方法，其特征在于，包括：
    在SD-WAN控制器接入SD-WAN网络后，收集SD-WAN网络的所有路由信息，将SD-WAN全网路由信息、下发到设备的路由信息以及网络关联的路由信息分别存储；
    用户建立网络业务时，控制器根据路由模型中的网络标识和路由前缀，按需给网络业务的关联设备下发路由信息，以及下发存储网络和关联设备的对应关系，并刷新已下发给关联设备的路由信息和网络的映射关系。
  2. 如权利要求1所述的SD-WAN网络中路由信息分发和更新的方法，其特征在于，还包括：所述控制器与设备建立连接后，收集SD-WAN网络的所有路由信息，并将所有路由信息按照设备标识存储在控制器的全量路由信息表中，当设备路由更新时，更新全量路由信息表。
  3. 如权利要求2所述的SD-WAN网络中路由信息分发和更新的方法，其特征在于，控制器收集SD-WAN网络的路由信息具体步骤为：
    关联设备在路由信息变化后，主动推送更新的路由信息；
    控制器在监听到设备路由更新事件时，刷新全量路由信息表。
  4. 如权利要求1所述的SD-WAN网络中路由信息分发和更新的方法，其特征在于，所述用户建立网络业务时，控制器根据网络标识和路由前缀，按需给关联的设备下发部分路由信息，存储网络和设备的对应关系具体包括：
    所述用户建立业务时，将关联设备信息，存入网络关联设备路由 信息存储表；
    结合网络路由前缀向关联设备按需下发路由信息，并将下发至关联设备的路由信息存储到关联设备的已下发路由信息存储表；
    采用南向协议将路由信息下发至对应的关联设备中。
  5. 如权利要求1所述的SD-WAN网络中路由信息分发和更新的方法，其特征在于，还包括：用户删除网络业务时，删除网络关联设备路由信息存储表中存储的对应信息；
    根据关联设备信息及网络标识，采用南向协议配置从设备上删除已下发的对应路由信息；
    从已下发路由信息存储表中删除存储的下发至关联设备的路由信息。
  6. 如权利要求1所述的SD-WAN网络中路由信息分发和更新的方法，其特征在于：
    当控制器收集到关联设备路由信息更新时，更新全量路由信息表内的存储信息；
    网络信息存储模块根据网络关联设备路由信息存储表找到有关的设备信息，然后通过下发路由存储模块查找已下发路由信息存储表，更新对应的路由信息，同时采用南向协议配置下发模块更新设备上对应的路由配置。
  7. 如权利要求1所述的SD-WAN网络中路由信息分发和更新的方法，其特征在于，还包括：
    在SD-WAN控制器接入SD-WAN网络前，建立基于Yang模型的统一路由信息模型；
    在后续过程中，基于所述统一路由信息模型设置配置和路由信息。
  8. 一种SD-WAN控制器，其特征在于，包括：
    业务系统，用于根据路由模型收集SD-WAN网络的路由信息；
    存储系统，用于存储SD-WAN全网路由信息、下发到设备的路由信息以及网络关联的路由信息；
    协议系统，用于根据网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，以及集中控制器给设备下发的路由配置信息。
  9. 如权利要求8所述的SD-WAN控制器，其特征在于：
    所述业务系统包括网络管理模块、路由规划模块和路由分发模块，所述网络管理模块用于创建和管理网络业务，所述路由规划模块用于根据建立的网络信息在网络范围内规划业务路由，所述路由分发模块用于向控制器连接的设备分发路由信息；
    所述存储系统包括全量路由存储模块、下发路由存储模块和网络信息存储模块，所述全量路由存储模块用于存储全网路由信息，所述下发路由存储模块用于存储下发至设备的路由信息，所述网络信息存储模块用于存储网络和设备的映射关系；
    所述协议系统包括协议配置下发模块，用于根据网络标识和路由前缀，按需给关联的设备下发部分路由信息与存储网络和设备的对应关系，以及集中控制器给设备下发的路由配置信息；
    还包括事件系统，所述事件系统用于监听设备路由变化并刷新设备已下发路由信息和网络的映射关系，通告至其余设备。
  10. 如权利要求9所述的SD-WAN控制器，其特征在于：
    所述事件系统还用于在监测到路由信息更新时，通知全量路由存储模块更新全量路由信息表的存储信息；
    网络信息存储模块还用于根据网络关联设备存储表找到有关的 设备信息；
    下发路由存储模块还用于查找下发路由信息表，更新对应的路由信息，同时采用南向协议配置下发模块更新设备上对应的路由配置。
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