WO2015123946A1 - 一种数据转发方法及装置 - Google Patents
一种数据转发方法及装置 Download PDFInfo
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- WO2015123946A1 WO2015123946A1 PCT/CN2014/080134 CN2014080134W WO2015123946A1 WO 2015123946 A1 WO2015123946 A1 WO 2015123946A1 CN 2014080134 W CN2014080134 W CN 2014080134W WO 2015123946 A1 WO2015123946 A1 WO 2015123946A1
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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
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- the present invention relates to the field of data devices such as a Packet Transport Network (PTN)/router/Software Defined Network (SDN), and particularly relates to a control plane and forwarding of a device bearer service. Plane field. BACKGROUND In a data device, due to the diversity of bearer services, it also includes protection and operation management and maintenance (OAM), and quality of service/access-list (QOS/ACL). ) and so on, and has very high real-time and reliability requirements for the device. At present, each function module of the device is processed independently, and each module needs to save related information, which causes redundancy of information and wastes resources such as memory of the device.
- PDN Packet Transport Network
- SDN Software Defined Network
- Embodiments of the present invention provide a data forwarding method and apparatus, and establish a unified model. Each module function is designed around the unified model, and finally the data forwarding process is controlled by the forwarding model.
- a data forwarding method including: marking, according to configuration data used for data forwarding, each data processing point that needs to perform data processing in a data forwarding process as each flow point; Describe the data processing relationship between the data processing points, establish relationship attributes between the flow points, and establish common attributes for each flow point to represent the operation content according to the operations required by the respective data processing points; And connecting the respective flow points according to the relationship attribute to form a data forwarding model for data forwarding; and forwarding the data according to the data forwarding model and common attributes of each flow point.
- the flow point includes a board flow point and a physical port flow point, and the board flow point and its physical port flow point are generated by detecting a network pipe insert or a physical plug operation, and according to the board flow point and its physical The data processing relationship between the port flow points determines the relationship between the board flow point and its port flow point as a parent-child relationship.
- the flow point further includes a logical port flow point, and the logical port flow point is generated by using the configuration data, and a relationship attribute between the physical port flow point and the logical port flow point is determined as a parent-child relationship. .
- the flow point further includes a service instance flow point, and the service instance flow point is generated by using the configuration data, and the relationship attribute between the service instance flow point and the physical/logical port flow point is determined as Brotherhood.
- the flow point further includes a pseudo-line stream point, the pseudo-line stream point is generated by using the configuration data, and a relationship attribute between the pseudo-line stream point and the service instance stream point is determined as Brotherhood.
- the flow point further includes a tunnel flow point, and the tunnel flow point is generated by using the configuration data, and a relationship attribute between the tunnel flow point and the pseudo-line flow point is determined as a parent-child relationship.
- the method further includes: generating a notification message indicating that the flow point attribute has changed when the relationship attribute and/or the common common attribute between the respective flow points changes, and sending the external message to the external component for external The component obtains the attribute change information of the corresponding flow point from the data forwarding model according to the received notification message, and configures the chip by using the attribute change information.
- a data forwarding apparatus including: a data receiving circuit configured to receive data to be forwarded; a processor configured to utilize the established data forwarding model to the data The data received by the receiving circuit is processed; the data transmitting circuit is configured to forward the data processed by the processor.
- the processor marks each data processing point that needs to be processed in the data forwarding process as each stream point according to the configuration data set as data forwarding, and according to the number between the data processing points.
- a relationship attribute between each flow point is established, and according to the operations required by the respective data processing points, common attributes for characterizing the operation content are established for each flow point, and the respective attributes are connected according to the relationship attribute.
- the flow point forms a data forwarding model for data forwarding.
- the beneficial effects of the embodiments of the present invention are as follows:
- the data service forwarding process can be uniformly abstracted into a model, and all processes in the data service forwarding process (protection, OAM, QOS/ACL) are unified on the model, and the control information of the data service is all embodied in the model, which facilitates the management and configuration of the data service into the chip.
- the external component receives the notification of the attribute of the stream point on the forwarding model and receives a notification when the attribute changes.
- 1 is a schematic block diagram of a data forwarding method according to an embodiment of the present invention.
- FIG. 2 is a model diagram of a line type Ethernet line service according to an embodiment of the present invention
- FIG. 3 is a data forwarding device according to an embodiment of the present invention
- the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.
- the invention establishes a data forwarding model, and the forwarding model diagram includes information such as service, protection, OAM, QOS/ACL, and the entire control process of the service is embodied in the forwarding model diagram. By establishing the forwarding model diagram, the pair can be completed. Control of the entire data forwarding process.
- the established data forwarding model abstracts the entire forwarding process of the data in the device, and obtains several key nodes, which are called Flowing Points.
- the data service needs to perform operations in the device forwarding process, such as stripping the MAC header, stripping the label, encapsulating the label stack, and encapsulating the MAC header.
- the processing abstraction at a level is obtained.
- the property of a stream point It can be seen that the flow point is actually a step of the service processing. Taking the PW stream point as an example, it includes the inbound and outbound label attributes. If the service goes out from the stream point, the outbound label on the stream point needs to be encapsulated.
- a service forwarding path can be combined into a forwarding path map by using various relationships, and the service forwarding paths in the entire network element are combined into one forwarding model map.
- the relationship between the flow point and the flow point in the forwarding path is proposed to solve the problem that the logical level in the business process is incomplete. Relationships in the model include parent-child relationships, sibling relationships, and holding relationships.
- the parent-child relationship reflects the relationship between the service layer and the client layer in the logical hierarchy, which can be graphically described as the parent-child relationship of the tree structure; the brother relationship reflects the parallel relationship in the logical hierarchy; the holding relationship is the aggregation relationship, which reflects a flow
- the point holds another stream point as an attribute of the stream point.
- the forwarding of the message is reflected in the connection relationship between the flow points.
- Each flow point needs to have a unique key value, and each flow point includes various attributes to describe the operations that need to be performed when the service passes through the flow point. Attributes include relationship attributes and common attributes. The common attributes are relatively high.
- the PW stream point and the LSP stream point have inbound and outbound label attributes, label action attributes, PW protection group stream points, and LSP protection group stream points all have work protection attributes.
- the attribute is configured at the same time.
- the user-configured attribute needs to be set to the key value, relationship attribute and common attribute on the flow point.
- PW Pseudowire
- you need to configure the ID of the PW flow point then configure the inbound and outbound tags of the PW flow point, and the tunnel policy selected by the PW flow point to enter which tunnel.
- the ID can be used as the key value.
- the inbound and outbound labels are common attributes.
- the selected tunneling strategy is to establish the parent-child relationship between the PW stream point and the LSP stream point, reflecting the relationship between the client layer and the service layer. It is possible for users to configure them separately, which means that the settings of these properties are not completed at one time. Which properties are set by the user.
- the key attribute is used to distinguish different flow points; the relationship attribute is used to distinguish the hierarchical relationship, that is, the relationship between the client layer and the service layer; the common attribute is used to process the data packet operation required on this layer.
- the external component registers the attribute on the data forwarding model, and registers with the stream point type plus the attribute type as a keyword. When the attribute on the type stream point changes, the external component attribute is notified to change. Further, when the user modifies the configuration, the flow point attribute changes, and the external component registers these attributes on the flow point, and when the attribute changes, the change attribute configuration on the flow point is taken out from the model.
- Step 101 Label each data processing point that needs to be processed in the data forwarding process as each flow point according to the configuration data used for data forwarding.
- Step 102 Establish relationship attributes between the stream points according to the data processing relationship between the data processing points, and establish operations for each stream point according to operations required by the data processing points.
- Step 103 Connect the respective flow points according to the relationship attribute to form a data forwarding model for data forwarding.
- the flow point includes a board flow point, a physical port flow point, a service instance flow point, a pseudo line flow point, and a tunnel flow point, and may further include a logical port flow point and a tunnel protection group flow. point.
- the operation of the network management card or the physical card is detected, and when the operation of the network management card or the physical card is detected, all the physical port flow points under the board flow point and the board flow point are generated, and Establish a parent-child relationship between the board stream point and its physical port stream point, and a common attribute of the board stream point and its port stream point.
- a logical port flow point may also be generated, and a parent-child relationship between the physical port flow point and the logical port flow point, and a common attribute of the logical port flow point are established.
- generating a service instance flow point by using the configuration data. If the physical port is connected to the service, the fraternal relationship between the physical port flow point and the service instance flow point is established.
- a protection group flow point may also be generated, and the protection group related information including the protection group switching state is saved in the protection group flow point.
- the protection point may be in the same place, and the HJ can not be in the same place.
- a corresponding protection group flow point is generated for one or more of the board flow point, the physical port flow point, the pseudo line flow point, and the tunnel flow point according to a.
- the relationship between the corresponding flow point and the protection group flow point is determined as a hold relationship. For example, if tunnel protection is configured, a tunnel protection group flow point is generated, and the tunnel protection group flow point is saved and included.
- the protection group attribute of the protection group switching state, the waiting recovery time, the lag time, and the automatic protection switching establishes a holding relationship between the tunnel flow point and the tunnel protection group flow point.
- the relationship attributes and/or the respective common attributes between the above flow points may be changed.
- Step 104 Forward the data according to the data forwarding model and common attributes of each flow point.
- data forwarding is achieved by each stream point, the common attributes of each stream point, and the relationship attributes between the stream points.
- 2 is a modeling diagram of a line type Ethernet line service according to an embodiment of the present invention. As shown in FIG. 2, the flow points in this example include a board flow point (Board) and an Ethernet port flow point (EthPort).
- the steps include: Step 1: Add a board flow point to the data forwarding model, and generate all physical ports under the board flow point. The flow point, and set the parent-child relationship between the physical port flow point and the board flow point, and set the common attributes of the board flow point and the physical port flow point (slot number, port number, etc.).
- Step 2 If configuring a logical port, You need to generate logical port flow points, establish logical and physical port parent-child relationships, and configure common attributes on logical ports. Otherwise, go directly to step 3.
- Step 3 User configuration VPWS service, data transfer Add a service instance flow point to the model and set its attributes. If it is a physical port access service, establish a fraternal relationship between the physical port flow point and the service instance flow point; if it is a logical port access service, establish a logical port. The fraternal relationship between the flow point and the flow point of the service instance.
- Step 4 Establish a PW flow point according to the VPWS service configured by the user, and set its common attributes, such as the inbound and outbound tags, and establish the PW flow point and the business instance flow point.
- the fifth step The user configures the tunnel policy selected by the PW.
- the forwarding model establishes the PW stream point and the tunnel stream point to establish a parent-child relationship.
- Step 6 The user configures the address resolution protocol on the outbound port of the tunnel (Address Resolution Protocol,
- Step 7 If the user configures protection, such as tunnel protection, a tunnel protection group flow point is also generated, and both the working tunnel flow point and the protection tunnel flow point hold the tunnel protection group flow point.
- the protection group attributes such as protection group switching status, Wait To Recovery (WTR), hysteresis time (HoldOff), and Automatic Protection Switching (APS) status are saved in the tunnel protection group flow point.
- WTR Wait To Recovery
- HoldOff hysteresis time
- APS Automatic Protection Switching
- the eighth step if the tunnel protection is configured, the OAM information needs to be configured on the working and protection tunnels to detect the alarm information on the tunnel. The OAM information is saved in the working tunnel and the protection tunnel.
- the user configures the Qos/Acl information.
- the Acl information is stored on the port flow point to control the access of the packet.
- the Qos information such as the mapping priority, is mapped to the PW label stack.
- the priority is stored in the VLAN stream point.
- the PW stream point determines whether the package work PW label or the protection PW label. Then, according to the father attribute of the PW stream point, the LSP stream point is obtained, and according to whether the LSP stream point holds the LSP protection group stream point and the protection group stream point working and protection attributes, it is determined whether the encapsulated working LSP label or the protection LSP label is configured; Then, the father of the LSP flow point will be the segment flow point, otherwise the father of the LSP flow point will be the outgoing port flow point; if the father of the LSP flow point is the segment flow point, it is necessary to pay attention to whether the segment flow point holds the segment protection group.
- the flow point is used to determine whether the segment protection is configured. If the father of the LSP flow point is the port flow point, the MAC address attribute of the port is directly encapsulated as the source MAC, and then the ARP information is encapsulated as the DMAC. From the N->U side, the service enters from the incoming packet flow point to the incoming port flow point, and then matches the incoming label according to the LSP flow point inbound label attribute, and then according to the label action attribute on the LSP flow point (peeling, interaction) ), and then do the labeling action, and also need to hold the protection group flow point according to the LSP flow point.
- the PW stream point may also be configured with protection. If there is protection, it is also required.
- the service protection attribute on the PW protection group flow point held by the PW flow point is used to determine whether the service packet needs to be received. Or discard; according to the traffic flow point connected by the PW flow point, then get the sibling node port flow point of the service flow point, and then go out from the port flow point.
- the external component (table generator) registers the attributes on the flow point.
- FIG. 3 is a structural block diagram of a data forwarding apparatus according to an embodiment of the present invention.
- the method includes: a data receiving circuit, a processor, and a data sending circuit.
- the data receiving circuit is configured to receive data to be forwarded;
- the processor is configured to process the data received by the data receiving circuit by using the established data forwarding model;
- the data sending circuit is configured to The data processed by the processor is forwarded.
- the data receiving circuit may include an input interface for receiving data
- the data transmitting circuit may include an output interface for transmitting data.
- the processor establishes a data forwarding model by the following steps: 1. Label each data processing point that needs to be processed in the data forwarding process as each flow point according to the configuration data used for data forwarding.
- Each of the flow points may include a board flow point, a physical port flow point, a service instance flow point, a pseudo line flow point, and a tunnel flow point, and may further include a logical port flow point and a protection group flow point (eg, a board protection group flow point, Physical port protection group flow point, pseudo line protection group flow point, tunnel protection group flow point, etc.).
- the processor is further configured to generate a notification message indicating that the flow point attribute has changed when the relationship attribute and/or the common attribute between the respective flow points changes, and send the information to the external component for
- the external component acquires attribute change information of the corresponding flow point from the data forwarding model according to the notification message, and configures the chip by using the attribute change information.
- the device described in this embodiment can be applied to a PTN, a router, or an SDN.
- the flow points in this embodiment include a board flow point, a port type flow point (physical port flow point, a logical port flow point), a PW flow point, a tunnel flow point, a segment flow point, a protection group flow point, an OAM flow point, Business instance flow point.
- the external component in this example is a table generator for configuring external chips such as microcode, FPGA, and SA40.
- Step 1 Add a board flow point to the data forwarding model, and generate the board stream at the same time.
- Step 2 If you configure a logical port, you need to generate a logical port flow point, establish a logical port and a physical port parent-child relationship, and configure the common attributes on the logical port. Otherwise, go directly to the third step.
- Step 3 The user configures the U->N service, adds the service instance flow point in the data forwarding model, and sets its attributes. If the physical port is connected to the service, the fraternal relationship between the physical port flow point and the service instance flow point is established.
- Step 4 Establish a PW flow point according to the 1;-> ⁇ service configured by the user, and set its common attributes, such as the inbound and outbound tags, and establish a sibling relationship between the PW flow point and the business instance flow point.
- Step 5 The user configures the tunnel policy selected by the PW.
- the data forwarding model establishes a PW stream point and a tunnel stream point to establish a parent-child relationship.
- Step 6 Configure ARP information on the outbound port of the tunnel and set the ARP attribute on the outbound port of the tunnel.
- Step 7 If protection is also configured, such as tunnel protection, a tunnel protection group flow point is also generated.
- both the working tunnel flow point and the protection tunnel flow point hold the tunnel protection group flow point.
- the protection group attributes such as protection group switching status, WTR time, HoldOff time, and APS status are saved in the tunnel protection group flow point.
- the processor processes the data received by the data receiving circuit by using a finally established data forwarding model, and performs data forwarding by the data sending circuit.
- the embodiments of the present invention have the following technical effects: 1.
- the embodiment of the present invention abstracts the characteristics of data forwarding, and obtains a data forwarding model. According to the data forwarding model, the entire data forwarding process can be unified, including various services, protection, and
- a data forwarding method and apparatus provided by an embodiment of the present invention have the following beneficial effects:
- the embodiment of the present invention abstracts the characteristics of data forwarding, and obtains a data forwarding model.
- the data forwarding model can unify the entire data forwarding process, including various services, protection, OAM, and QOS/ACL functions.
- the forwarding process of the service can be visually described, and the forwarding process of the service can be unified. Control, easy to encode, very scalable, can save equipment resources.
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Abstract
本发明公开了一种数据转发方法及装置,所述方法包括:根据用于数据转发的配置数据,把数据转发过程中需要进行数据处理的各个数据处理点标注为各个流点;根据所述各个数据处理点之间的数据处理关系,建立各个流点之间的关系属性,并根据所述各个数据处理点所需的操作,为各个流点建立用来表征其操作内容的普通属性;依据所述关系属性连接所述各个流点,形成用于数据转发的数据转发模型;根据所述数据转发模型和各个流点的普通属性,对所述数据进行转发。本发明建立了统一的模型,各模块功能围绕所述模型进行设计,最终实现通过这个模型控制数据的转发流程,可以使设备设计简单、扩展性好。
Description
一种数据转发方法及装置 技术领域 本发明涉及分组传送网 (Packet Transport Network, PTN) /路由器 /软件定义网络 ( Software Defined Network, SDN) 等数据设备领域, 特别涉及设备承载业务的控制 平面和转发平面领域。 背景技术 在数据设备中,由于承载业务的多样性,同时包含保护和操作管理维护(Operation Administration and Maintenance, OAM)、 月艮务质量 /访问控制列表 ( Quality of Service / Access-List, QOS/ACL) 等处理, 并且对设备提出具有非常高的实时性和可靠性要 求。 目前设备各个功能模块独立处理, 在每一个模块都需要保存相关信息, 会造成信 息的冗余, 浪费设备的内存等资源。 如果能够建立一种统一的模型, 各个模块功能围 绕这个统一模型来进行设计, 最终实现通过这个转发模型控制数据的转发流程, 在可 以使得设备设计简单、 扩展性好。 发明内容 本发明实施例提供了一种数据转发方法及装置, 建立一种统一的模型, 各个模块 功能围绕这个统一模型来进行设计,最终实现通过这个转发模型控制数据的转发流程。 根据本发明实施例的一个方面, 提供了一种数据转发方法, 包括: 根据用于数据转发的配置数据, 把数据转发过程中需要进行数据处理的各个数据 处理点标注为各个流点; 根据所述各个数据处理点之间的数据处理关系, 建立各个流点之间的关系属性, 并根据所述各个数据处理点所需的操作, 为各个流点建立用来表征其操作内容的普通 属性; 依据所述关系属性连接所述各个流点, 形成用于数据转发的数据转发模型; 根据所述数据转发模型和各个流点的普通属性, 对所述数据进行转发。
优选地, 所述流点包括板流点和物理端口流点, 通过检测网管插板或物理插板操 作, 生成所述板流点及其物理端口流点, 并根据所述板流点与其物理端口流点之间的 数据处理关系, 将所述板流点与其端口流点之间的关系属性确定为父子关系。 优选地, 所述流点还包括逻辑端口流点, 利用所述配置数据, 生成所述逻辑端口 流点, 并将所述物理端口流点和逻辑端口流点之间的关系属性确定为父子关系。 优选地, 所述流点还包括业务实例流点, 利用所述配置数据, 生成所述业务实例 流点, 并将所述业务实例流点与所述物理 /逻辑端口流点的关系属性确定为兄弟关系。 优选地, 所述流点还包括伪线流点, 利用所述配置数据, 生成所述伪线流点, 并 将所述伪线流点与所述业务实例流点之间的关系属性确定为兄弟关系。 优选地, 所述流点还包括隧道流点, 利用所述配置数据, 生成所述隧道流点, 并 将所述隧道流点与伪线流点之间的关系属性确定为父子关系。 优选地, 根据所述配置数据, 为所述板流点、 物理端口流点、 伪线流点、 隧道流 点中的至少一个流点生成相应的保护组流点, 并将相应流点及其保护组流点之间的关 系属性确定为持有关系, 其中, 所生成的相应的保护组流点中保存包括保护组切换状 态的保护组相关信息。 优选地, 还包括: 当所述各个流点之间的关系属性和 /或各自的普通属性发生变化时, 生成用于指示 流点属性已改变的通知消息, 并发送至外部组件, 以供外部组件根据收到的通知消息, 从所述数据转发模型中获取相应流点的属性变化信息, 并利用所述属性变化信息配置 芯片。 根据本发明实施例的另一方面, 提供了一种数据转发装置, 包括: 数据接收电路, 设置为接收待转发的数据; 处理器, 设置为利用其已建立的数据转发模型, 对所述数据接收电路收到的数据 进行处理; 数据发送电路, 设置为对所述处理器处理得到的数据进行转发。 优选地, 所述处理器根据设置为数据转发的配置数据, 把数据转发过程中需要进 行数据处理的各个数据处理点标注为各个流点, 并根据所述各个数据处理点之间的数
据处理关系, 建立各个流点之间的关系属性, 根据所述各个数据处理点所需的操作, 为各个流点建立用来表征其操作内容的普通属性, 依据所述关系属性连接所述各个流 点, 形成用于数据转发的数据转发模型。 与现有技术相比较, 本发明实施例的有益效果在于: 通过本发明实施例的技术方案, 可以将数据业务转发流程统一抽象建立成一个模 型, 将数据业务转发过程中的所有过程 (保护、 OAM、 QOS/ACL) 等统一在模型上 体现,数据业务的控制信息全部体现在模型上,方便对数据业务管理和配置到芯片中。 外部组件通过注册转发模型上流点的属性, 在属性变化时收到通知, 进行配置芯片操 作。 附图说明 图 1是本发明实施例提供的数据转发方法原理框图; 图 2是本发明实施例提供的一条线型以太网线业务的建模图; 图 3是本发明实施例提供的数据转发装置结构框图。 具体实施方式 以下结合附图对本发明的优选实施例进行详细说明, 应当理解, 以下所说明的优 选实施例仅用于说明和解释本发明, 并不用于限定本发明。 本发明建立了数据转发模型, 转发模型图中包括业务、 保护、 OAM、 QOS/ACL 等信息, 将业务的整个控制过程都体现在转发模型图中, 通过建立这个转发模型图, 就可以完成对整个数据转发过程的控制。 所建立的数据转发模型通过对数据在设备中的整个转发过程进行抽象, 得到若干 关键的节点, 称之为流点 (Flowing Point)。 换句话说, 数据业务在设备转发过程中需要 做的操作, 例如剥离 MAC头、 剥离标签、 封装标签栈、 封装 MAC头等处理, 在数据 报文的转发中, 将在一个层次上的处理抽象得到一个流点的属性。 可见, 所述流点实 际上是业务处理的一个步骤, 以 PW流点为例, 它包含了入、 出标签属性, 如果业务 从该流点出去, 则需要封装该流点上的出标签, 如果业务从该流点进入, 则需要匹配 该流点上的入标签, 同时根据该入标签的动作属性进行标签栈处理 (剥离、 交换)。
一条业务转发路径就可以利用这若干流点通过各种关系组合成一条转发路径图, 整个网元内的业务转发路径就组合成一张转发模型图。 转发路径中的流点和流点之间 关系的提出是为了解决业务处理中逻辑层次不完整的问题。模型中关系包含父子关系、 兄弟关系和持有关系。 父子关系体现逻辑层次中的服务层和客户层之间的关系, 可以 形象描述成树结构的父子关系; 兄弟关系体现逻辑层次中的平行关系; 持有关系体现 是聚合关系, 体现的是一个流点持有另外一个流点作为该流点的一个属性。 报文的转 发体现为流点间的连接关系。 每一个流点需要有一个唯一的键值, 同时每一个流点包括各种属性, 用以描述业 务经过该流点时需要所做的操作。 属性包括关系属性和普通属性。 其中, 所述普通属 性比较多, 例如 PW流点和 LSP流点都有入、 出标签属性, 标签动作属性, PW保护 组流点和 LSP保护组流点都有工作保护属性,业务流点上 VPN ID,端口流点上有 OAM 的 EFM属性, 以及 ACL属性, 等等; 所述关系属性包括关联的父亲流点、孩子流点、 兄弟流点和持有的其他流点。 用户配置时, 会同时配置属性, 在生成流点时, 需将用 户配置的属性设置到流点上的键值、 关系属性和普通属性。 例如用户配置伪线 (Pseudowire, PW) 流点时, 先需要配置 PW流点的 ID, 然后配置 PW流点的入出 标签, 以及 PW流点选择的隧道策略, 进入哪条隧道。 根据用户的这个配置, ID就可 以作为键值, 入出标签就是普通属性, 选择的隧道策略就是建立 PW流点和 LSP流点 的父子关系, 体现客户层和服务层的关系。 用户有可能分开配置, 也就是说这些属性 的设置不是一次完成的。 用户配置了哪些就设置哪些属性。 其中, 键值用来区分不同 的流点; 关系属性用来区分层次关系, 也就是客户层和服务层的关系; 普通属性用来 处理本层上需要做的数据报文操作。 外界组件注册数据转发模型上的属性, 以流点类型加属性类型为关键字注册, 当 该类型流点上的这种属性变化时, 通知外界组件属性变化。 进一步说, 用户修改配置 的时候, 流点属性会变化, 外界组件注册流点上的这些属性, 在属性变化时, 从模型 中取出流点上的变化属性配置。 简而言之, 收到用户配置数据时, 根据配置数据建立流点, 并建立流点和其他流 点之间的关系属性, 包括父子关系、 兄弟关系和持有关系, 设置该流点的普通属性。 外界组件观察数据转发模型上的各流点属性通知, 获取变化的属性值, 进行相应的处 理。 图 1是本发明实施例提供的数据转发方法原理框图, 如图 1所示, 步骤包括:
步骤 101 : 根据用于数据转发的配置数据, 把数据转发过程中需要进行数据处理 的各个数据处理点标注为各个流点。 步骤 102: 根据所述各个数据处理点之间的数据处理关系, 建立各个流点之间的 关系属性, 并根据所述各个数据处理点所需的操作, 为各个流点建立用来表征其操作 内容的普通属性。 步骤 103 : 依据所述关系属性连接所述各个流点, 形成用于数据转发的数据转发 模型。 在所述步骤 101至步骤 103中, 所述流点包括板流点、 物理端口流点、 业务实例 流点、 伪线流点、 隧道流点, 还可以包括逻辑端口流点、 隧道保护组流点。 首先对网 管插板或物理插板的操作进行检测, 并在检测到网管插板或物理插板的操作时, 生成 所述板流点及所述板流点下的所有物理端口流点, 并建立所述板流点与其物理端口流 点之间的父子关系, 以及所述板流点及其端口流点各自的普通属性。 优选地, 利用所 述配置数据, 还可以生成逻辑端口流点, 并建立所述物理端口流点和逻辑端口流点之 间的父子关系, 以及所述逻辑端口流点的普通属性。 其次, 利用所述配置数据生成业 务实例流点, 如果是物理端口接入业务, 则建立所述物理端口流点与所述业务实例流 点之间的兄弟关系, 如果是逻辑端口接入业务, 则建立所述逻辑端口流点与所述业务 实例流点之间的兄弟关系。 然后, 利用所述配置数据生成所述伪线流点, 并建立所述 业务实例流点与所述伪线流点之间的兄弟关系, 以及所述伪线流点的普通属性。最后, 利用所述配置数据生成所述隧道流点, 并建立所述伪线流点与隧道流点之间的父子关 系, 以及所述隧道流点的普通属性。 根据所述配置数据, 还可以生成保护组流点, 所述保护组流点中保存包括保护组 切换状态的保护组相关信息。 所述保 纽流点可能 在, 也 HJ能不 在, 也》能 在 多个, Λ休通过用户配置保 组来牛成保护组流点, 例如: 用户配置板保护组, 则牛 成板保护组流点, .并建 :板流点 ½板保护组流点之间的持 关系, : 用户还 Ε置伪线 保护, 则生成伪线保护组流点, .并建立伪线流点.与伪线保 组流点之间的持^关系。
Λ休地, 如 ES保护, 则按照配 a, 为所述板流点、 物理端口流点、 伪线流点、 隧 道流点中的某一个或多个流点生成相应的保护组流点, 并将相应流点及其保护组流点 之间的关系属性确定为持有关系, 例如, 如果配置了隧道保护, 则生成隧道保护组流 点, 并在所述隧道保护组流点中保存包括保护组切换状态、 等待恢复时间、 迟滞时间 和自动保护倒换的保护组属性,建立所述隧道流点与隧道保护组流点之间为持有关系。
上述各个流点之间的关系属性和 /或各自的普通属性可以发生变化, 当发生变化 时, 生成用于指示流点属性已改变的通知消息, 并发送至外部组件, 外部组件根据收 到的通知消息, 从所述数据转发模型中获取相应流点的属性变化信息, 并利用所述属 性变化信息配置芯片。 步骤 104: 根据所述数据转发模型和各个流点的普通属性, 对所述数据进行转发。 换句话说, 通过各个流点、 各个流点的普通属性、 各个流点之间的关系属性, 实现数 据转发。 图 2是本发明实施例提供的一条线型以太网线业务的建模图, 如图 2所示, 本实 例中的流点,包括板流点(Board)、 以太网端口流点(EthPort)、 Vlan端口流点、 VPWS 业务流点、 伪线流点 (PW)、 隧道流点 (Tunnel 段流点 (Section), 图 2中没有保 护流点, 但如果配置了保护, 则需要包含保护流点信息。 以配置一个 VPWS业务, 并 带隧道保护为例, 步骤包括: 第一步: 网管插板或者物理插板, 数据转发模型中添加板流点, 同时生成该板流 点下的所有物理端口流点, 并且设置物理端口流点和板流点的父子关系, 同时设置板 流点和物理端口流点的普通属性 (槽位号, 端口号等;)。 第二步: 如果配置逻辑端口, 需要生成逻辑端口流点, 建立逻辑端口和物理端口 父子关系, 并配置逻辑端口上普通属性, 否则直接进入第三步。 第三步: 用户配置 VPWS业务, 数据转发模型中添加业务实例流点, 并设置其属 性。 如果是物理端口接入业务,则建立物理端口流点和业务实例流点之间的兄弟关系; 如果是逻辑端口接入业务, 则建立逻辑端口流点和业务实例流点之间的兄弟关系。 第四步: 根据用户配置的 VPWS业务建立 PW流点, 并设置其普通属性, 例如入 出标签, 同时建立 PW流点和业务实例流点之间的兄弟关系。 第五步: 用户配置 PW选择的隧道策略。 转发模型建立 PW流点和隧道流点建立父子关系。 第六步: 用户配置隧道出端口上的地址解析协议 (Address Resolution Protocol,
ARP) 信息, 在隧道出端口流点上设置 ARP属性。
第七步: 如果用户配置了保护, 例如隧道保护, 那么还会生成隧道保护组流点, 工作隧道流点和保护隧道流点都持有该隧道保护组流点。 隧道保护组流点中保存保护组切换状态、等待恢复时间(Wait To Recovery, WTR)、 迟滞时间 (HoldOff)、 自动保护倒换 (Automatic Protection Switching, APS)状态等 保护组属性。 第八步, 如果用户配置了隧道保护, 那么还需要在工作和保护隧道上配置 OAM 信息, 用于检测隧道上告警信息, 在工作隧道流点和保护隧道流点保存 OAM信息。 第九步, 用户配置 Qos/Acl信息。
Acl信息保存在端口流点上,对报文进行接入控制; Qos信息,例如映射优先级等, 例如将 VLAN优先级映射到 PW标签栈中, 这个优先级保存在 VLAN流点上。 建立数据转发模型后, 利用所述数据转发模型对业务数据进行转发控制的步骤如 下: 从建立的 VPWS 业务而言, 从用户网络接口到网络网络接口 (User Network Interface-> Network Network Interface, U->N) 侧, 业务从入向板流点到入向板的端口 流点进入, 然后连接到一个 VPWS业务实例流点上, 在这个业务流点上获取到需要出 去的 NI侧的 PW流点, 根据 PW流点是否持有 PW保护组流点, 以及保护组流点上 的工作和保护属性, 判断封装工作 PW标签还是保护 PW标签。 然后根据 PW流点的 父亲属性得到 LSP流点, 根据 LSP流点是否持有 LSP保护组流点以及保护组流点的 工作和保护属性, 判断封装工作 LSP标签还是保护 LSP标签; 如果配置了段, 则 LSP 流点的父亲将是段流点, 否则 LSP流点的父亲将是出端口流点; 如果得到 LSP流点的 父亲是段流点, 则需要关注段流点是否持有段保护组流点, 来判断是否配置了段层保 护; 如果是 LSP 流点的父亲是端口流点, 则直接封装端口的 MAC 地址属性作为源 MAC, 然后再封装 ARP信息作为 DMAC。 从 N->U侧, 业务从入向板流点到入向端口流点进入, 然后根据 LSP流点入标签 属性匹配入标签是否一致, 然后根据 LSP流点上的标签动作属性 (剥离、 交互), 然 后做标签动作,同时也还需要根据 LSP流点是否持有保护组流点, 如果存在, 需要根据 保护组流点上的工作保护属性来判断是否收这个业报文, 还是丢弃; 根据 PW流点入 标签属性匹配入标签是否一致, 然后根据 PW流点上的标签动作属性 (剥离、 交互), 然后做标签动作, 同样 PW流点上也有可能配置了保护, 如果存在保护, 也需要根据 PW流点持有的 PW保护组流点上的工作保护属性来判断是否需要收这个业务报文,
还是丢弃; 根据 PW流点连接的业务流点, 然后得到业务流点的兄弟节点端口流点, 然后从该端口流点出去。 外部组件 (表生成器) 注册了流点上的属性, 当流点上的这个属性发生变化时, 会从注册表中需要通知的外部组件, 然后通知属性变化, 外部组件收到通知后, 从模 型获取变化的属性值来配置芯片, 从而达到控制数据报文处理的目的。 图 3是本发明实施例提供的数据转发装置结构框图, 如图 3所示, 包括: 数据接 收电路、 处理器、 数据发送电路。 其中: 数据接收电路, 设置为接收待转发的数据; 处理器, 设置为利用其已建立的数据转发模型, 对所述数据接收电路收到的数据 进行处理; 数据发送电路, 设置为对所述处理器处理得到的数据进行转发。 优选地, 所述数据接收电路可以包括用来接收数据的输入接口, 所述数据发送电 路可以包括用来发送数据的输出接口。 优选地, 所述处理器通过以下步骤建立数据转发模型: 1、根据用于数据转发的配置数据,把数据转发过程中需要进行数据处理的各个数 据处理点标注为各个流点。 所述各个流点可以包括板流点、 物理端口流点、 业务实例 流点、 伪线流点、 隧道流点, 还可以包括逻辑端口流点、 保护组流点 (例如板保护组 流点、 物理端口保护组流点、 伪线保护组流点、 隧道保护组流点等等)。
2、根据所述各个数据处理点之间的数据处理关系,建立各个流点之间的关系属性, 例如, 建立板流点与物理端口流点之间的父子关系、 建立物理端口流点与业务实例流 点之间的兄弟关系、 建立业务实例流点与伪线流点之间的兄弟关系、 建立伪线流点与 隧道流点之间的父子关系等等, 并根据所述各个数据处理点所需的操作, 为各个流点 建立用来表征其操作内容的普通属性。
3、 依据所述关系属性连接所述各个流点, 形成用于数据转发的数据转发模型。 所述处理器还设置为当所述各个流点之间的关系属性和 /或各自的普通属性发生 变化时, 生成用于指示流点属性已改变的通知消息, 并发送至外部组件, 以供外部组 件根据所述通知消息, 从所述数据转发模型中获取相应流点的属性变化信息, 并利用 所述属性变化信息配置芯片。
本实施例所述的装置可以应用于 PTN、 路由器、 SDN中。 本实施例中的流点, 包括板流点、 端口类流点 (物理端口流点、 逻辑端口流点)、 PW流点、 隧道流点、 段流点、 保护组流点、 OAM流点、 业务实例流点。 本实例中的 外部组件是表生成器, 用于配置微码、 FPGA、 SA40等外部芯片。 以用户配置一个 11->^^的线性业务描述建立数据转发模型的过程, 具体步骤为: 第一步: 网管插板或者物理插板, 数据转发模型中添加板流点, 同时生成该板流 点下的所有物理端口流点, 并且设置物理端口流点和板流点的父子关系, 同时设置板 流点和物理端口流点的普通属性。 第二步: 如果配置逻辑端口, 需要生成逻辑端口流点, 建立逻辑端口和物理端口 父子关系, 并配置逻辑端口上普通属性, 否则直接进入第三步。 第三步: 用户配置 U->N业务, 数据转发模型中添加业务实例流点, 并设置其属 性。 如果是物理端口接入业务,则建立物理端口流点和业务实例流点之间的兄弟关系; 如果是逻辑端口接入业务, 则建立逻辑端口流点和业务实例流点之间的兄弟关系。 第四步: 根据用户配置的 1;->^^业务建立 PW流点, 并设置其普通属性, 例如入 出标签, 同时建立 PW流点和业务实例流点之间的兄弟关系。 第五步: 用户配置 PW选择的隧道策略。 数据转发模型建立 PW流点和隧道流点 建立父子关系。 第六步: 用户配置隧道出端口上的 ARP信息, 在隧道出端口流点上设置 ARP属 性。 第七步: 如果还配置保护, 例如隧道保护, 那么还会生成隧道保护组流点。 同时 将工作隧道流点和保护隧道流点都持有该隧道保护组流点。 隧道保护组流点中保存保 护组切换状态、 WTR时间、 HoldOff时间、 APS状态等保护组属性。 所述处理器利用最终建立的数据转发模型, 对所述数据接收电路收到的数据进行 处理, 并通过所述数据发送电路进行数据转发。 综上所述, 本发明实施例具有以下技术效果:
1、 本发明实施例针对数据转发的特点, 对其进行抽象, 得到一种数据转发模型, 根据这种数据转发模型, 可以将整个数据转发流程统一起来, 包括各种业务、 保护、
OAM和 QOS/ACL功能;
2、根据这个数据转发模型, 可以形象的描述业务的转发流程, 对业务的转发流程 做统一的控制, 方便编码, 扩展性非常好, 可以节省设备资源。 尽管上文对本发明进行了详细说明, 但是本发明不限于此, 本技术领域技术人员 可以根据本发明的原理进行各种修改。 因此, 凡按照本发明原理所作的修改, 都应当 理解为落入本发明的保护范围。
工业实用性 如上所述, 本发明实施例提供的一种数据转发方法及装置具有以下有益效果: 本发明实施例针对数据转发的特点, 对其进行抽象, 得到一种数据转发模型, 根据 这种数据转发模型,可以将整个数据转发流程统一起来,包括各种业务、保护、 OAM 和 QOS/ACL功能; 另外根据这个数据转发模型, 可以形象的描述业务的转发流程, 对业务的转发流程做统一的控制, 方便编码, 扩展性非常好, 可以节省设备资源。
Claims
权 利 要 求 书 、 一种数据转发方法, 包括: 根据用于数据转发的配置数据, 把数据转发过程中需要进行数据处理的各 个数据处理点标注为各个流点; 根据所述各个数据处理点之间的数据处理关系, 建立各个流点之间的关系 属性, 并根据所述各个数据处理点所需的操作, 为各个流点建立用来表征其操 作内容的普通属性; 依据所述关系属性连接所述各个流点,形成用于数据转发的数据转发模型; 根据所述数据转发模型和各个流点的普通属性, 对所述数据进行转发。 、 根据权利要求 1所述的方法, 其中, 所述流点包括板流点和物理端口流点, 通 过检测网管插板或物理插板操作, 生成所述板流点及其物理端口流点, 并根据 所述板流点与其物理端口流点之间的数据处理关系, 将所述板流点与其端口流 点之间的关系属性确定为父子关系。 、 根据权利要求 2所述的方法, 其中, 所述流点还包括逻辑端口流点, 利用所述 配置数据, 生成所述逻辑端口流点, 并将所述物理端口流点和逻辑端口流点之 间的关系属性确定为父子关系。 、 根据权利要求 3所述的方法, 其中, 所述流点还包括业务实例流点, 利用所述 配置数据, 生成所述业务实例流点, 并将所述物理 /逻辑端口流点与所述业务实 例流点之间的关系属性确定为兄弟关系。 、 根据权利要求 4所述的方法, 其中, 所述流点还包括伪线流点, 利用所述配置 数据, 生成所述伪线流点, 并将所述业务实例流点与所述伪线流点之间的关系 属性确定为兄弟关系。 、 根据权利要求 5所述的方法, 其中, 所述流点还包括隧道流点, 利用所述配置 数据, 生成所述隧道流点, 并将所述伪线流点与隧道流点之间的关系属性确定 为父子关系。 、 根据权利要求 6所述的方法, 其中, 根据所述配置数据, 为所述板流点、 物理 端口流点、 伪线流点、 隧道流点中的至少一个流点生成相应的保护组流点, 并
将相应流点及其保护组流点之间的关系属性确定为持有关系, 其中, 所生成的 相应的保护组流点中保存包括保护组切换状态的保护组相关信息。 、 根据权利要求 1-7任意一项所述的方法, 其中, 还包括: 当所述各个流点之间的关系属性和 /或各自的普通属性发生变化时,生成用 于指示流点属性已改变的通知消息, 并发送至外部组件, 以供外部组件根据收 到的通知消息, 从所述数据转发模型中获取相应流点的属性变化信息, 并利用 所述属性变化信息配置芯片。 、 一种数据转发装置, 包括: 数据接收电路, 设置为接收待转发的数据;
处理器, 设置为利用其已建立的数据转发模型, 对所述数据接收电路收到 的数据进行处理;
数据发送电路, 设置为对所述处理器处理得到的数据进行转发。 0、 根据权利要求 9所述的装置,其中,所述处理器根据用于数据转发的配置数据, 把数据转发过程中需要进行数据处理的各个数据处理点标注为各个流点, 并根 据所述各个数据处理点之间的数据处理关系, 建立各个流点之间的关系属性, 根据所述各个数据处理点所需的操作, 为各个流点建立用来表征其操作内容的 普通属性, 依据所述关系属性连接所述各个流点, 形成用于数据转发的数据转 发模型。
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