WO2014177100A1 - 数据转发处理的方法及设备 - Google Patents

数据转发处理的方法及设备 Download PDF

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Publication number
WO2014177100A1
WO2014177100A1 PCT/CN2014/078661 CN2014078661W WO2014177100A1 WO 2014177100 A1 WO2014177100 A1 WO 2014177100A1 CN 2014078661 W CN2014078661 W CN 2014078661W WO 2014177100 A1 WO2014177100 A1 WO 2014177100A1
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WIPO (PCT)
Prior art keywords
mspw
forwarding information
information
protection link
forwarding
Prior art date
Application number
PCT/CN2014/078661
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English (en)
French (fr)
Inventor
吴世华
李娟�
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP14792109.2A priority Critical patent/EP3016325B1/en
Priority to RU2016106195A priority patent/RU2630375C2/ru
Priority to US14/907,294 priority patent/US9893930B2/en
Publication of WO2014177100A1 publication Critical patent/WO2014177100A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2592—Translation of Internet protocol [IP] addresses using tunnelling or encapsulation
    • 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
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure

Definitions

  • the present invention relates to network data communication technologies, and in particular, to a data forwarding processing method and an operator side operator edge device (SPE). Background technique
  • Edge-to-edge PWE3 provides tunneling over packet-switched networks (IP/MPLS) to emulate some services (eg, Frame Relay (FR), Layer 2 virtualization of Asynchronous Transfer Mode (ATM), Ethernet (Ethernet), Time Division Multiplex Synchronous Optical Network/Synchronous Digital Hierarchy (TDM SONET/SDH)
  • IP/MPLS packet-switched networks
  • FR Frame Relay
  • ATM Layer 2 virtualization of Asynchronous Transfer Mode
  • Ethernet Ethernet
  • TDM SONET/SDH Time Division Multiplex Synchronous Optical Network/Synchronous Digital Hierarchy
  • VPN private network
  • PWE3 is an extension of the L2VPN Martini protocol. It adds the Multi-Pseudo Wires (MSPW) function and extends the networking mode.
  • MSPW refers to multiple PWs between the provider edge device (U-PE, also called user access device) on the user side and the U-PE.
  • U-PE provider edge device
  • the U-PE in the multi-hop mode is the same as the U-PE forwarding mechanism in the single-hop mode.
  • the label switching at the PW label (Label) level is required on the switching PE (S-PE, Switching PE).
  • S-PE switching PE
  • Switching PE switching PE
  • the two PEs are not in the same autonomous system.
  • the signaling connection or tunneling between the two PEs cannot be established.
  • the signaling on the two PEs is different.
  • the LDP runs on one end and the RSVP runs on the other end.
  • the access device can run MPLS, it has no capability.
  • a large number of LDP sessions are established.
  • the UFPE User Facing Provider Devices
  • the high-performance device S-PE can be used as the switching node of the LDP session, similar to the signaling reflector. .
  • the MSPW function can reduce the number of Label Distribution Protocol (LDP) connections supported by the access device, that is, reduce the opening of the LDP session of the access node.
  • LDP Label Distribution Protocol
  • the multi-hop access node satisfies the convergence function of the PW, making the network more flexible and suitable for grading (access, aggregation, and core). Support more Telecommunication (Time Division Multiplex) interfaces.
  • the technical problem to be solved by the embodiments of the present invention is to provide a data forwarding processing method and an operator-side operator edge device (SPE) to solve the problem that data packets cannot be forwarded when an intermediate device fails.
  • SPE operator-side operator edge device
  • the embodiment of the invention provides a data forwarding processing method, including:
  • the operator-side operator edge device configures data forwarding information, where the data forwarding information includes a correspondence between the multi-segment pseudowire (MSPW) information and the forwarding information of the MSPW protection link group or the MSPW information and the MSPW protection chain.
  • MSPW multi-segment pseudowire
  • the SPE receives the service packet, where the service packet carries the MSPW information; the SPE is configured according to the correspondence between the MSPW information and the forwarding information of the MSPW protection link group, or the MSPW information and the MSPW protection chain.
  • the correspondence between the forwarding information of the other MSPWs other than the forwarding information of the path group, and the forwarding information of the MSPW protection link group corresponding to the MSPW information query carried in the service message or the MSPW protection link group Forwarding information of other MSPWs other than forwarding information;
  • the SPE performs label encapsulation and forwarding according to the forwarding information of the MSPW protection link group that is queried or the forwarding information of other MSPWs except the forwarding information of the MSPW protection link group.
  • the forwarding information of the MSPW protection link group includes forwarding information of at least one active protection link and forwarding information of at least one backup protection link.
  • the step of performing label encapsulation according to the forwarding information of the forwarded MSPW protection link group comprises: performing label encapsulation according to valid protection link forwarding information.
  • the method further includes:
  • the SPE determines that the current effective protection link is faulty, it selects a backup protection link as the new effective protection link.
  • the SPE selects the protection link with the highest priority from all the backup protection links as a new effective protection link.
  • An embodiment of the present invention provides a carrier-side operator edge device (SPE), where the SPE includes: a data forwarding information management unit, a message receiving unit, a query unit, and a packet encapsulation and forwarding unit, where
  • the data forwarding information management unit is configured to: configure data forwarding information, where the data forwarding information includes a correspondence between the multi-segment pseudowire (MSPW) information and the forwarding information of the MSPW protection link group, or the MSPW information and the MSPW protection chain. Correspondence of forwarding information of other MSPWs other than forwarding information of the road group;
  • MSPW multi-segment pseudowire
  • the packet receiving unit is configured to: receive a service packet, where the service packet carries the MSPW information;
  • the query unit is configured to: correspond to a correspondence between the MSPW information and the forwarding information of the MSPW protection link group, or a correspondence between the MSPW information and forwarding information of other MSPWs except the forwarding information of the MSPW protection link group. And forwarding the forwarding information of the MSPW protection link group corresponding to the MSPW information query carried in the service text or forwarding information of other MSPWs except the forwarding information of the MSPW protection link group;
  • the packet encapsulation and forwarding unit is configured to perform label encapsulation and forwarding according to the forwarding information of the MSPW protection link group that is queried or the forwarding information of other MSPWs other than the forwarding information of the MSPW protection link group.
  • the forwarding information of the MSPW protection link group includes forwarding information of at least one active protection link and forwarding information of at least one backup protection link.
  • the packet encapsulation and forwarding unit is configured to be queried according to the following manner.
  • the packet forwarding information of the MSPW protection link group is encapsulated: label encapsulation is performed according to the effective protection link forwarding information.
  • the data forwarding information management unit is further configured to configure the data forwarding signal as follows Information: When determining that the current active protection link is faulty, select a backup protection link as the new effective protection link.
  • the SPE selects the protection link with the highest priority from all the backup protection links as a new effective protection link.
  • the technical solution of the invention can improve the forwarding performance of the PWE3 MSPW function, and realize
  • the MSPW protection group function of the MSPW can quickly switch traffic when the MSPW link fails. This effectively protects service traffic and prevents service traffic from being interrupted. This improves the robustness of the MSPW network and can better meet the requirements. The needs of network operators. BRIEF abstract
  • Embodiment 1 is a flowchart of Embodiment 1 of a data forwarding processing method according to an embodiment of the present invention
  • Embodiment 2 is a flowchart of Embodiment 2 of a data forwarding processing method according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a module of an operator-side operator edge device (SPE) according to an embodiment of the present invention.
  • SPE operator-side operator edge device
  • Embodiment 1 of the data forwarding processing method of the embodiment of the present invention includes: Step 101: An operator side edge device (SPE) configures data forwarding information, where the data forwarding information includes multiple pieces of pseudowires ( Correspondence between the information and the forwarding information of the MSPW protection link group or the correspondence between the MSPW information and the forwarding information of other MSPWs other than the forwarding information of the MSPW protection link group;
  • the forwarding information of the MSPW protection link group includes forwarding information of at least one effective protection link and forwarding information of at least one backup protection link.
  • the embodiment of the present invention does not limit the form of the correspondence between the multi-segment pseudo-line (MSPW) information and the forwarding information of the MSPW protection link group or the forwarding information of other MSPWs except the forwarding information of the MSPW protection link group. As long as the corresponding forwarding information can be found based on the MSPW information.
  • MSPW multi-segment pseudo-line
  • the forwarding information when there is no protection group, includes a forwarding label, a PW label, and an outgoing interface.
  • the forwarding information when a protection group exists, includes the forwarding label, the MSPW label, and the outgoing interface.
  • the step of the SPE managing data forwarding information includes:
  • the SPE determines that the current effective protection link is faulty, it selects a backup protection link as the new effective protection link.
  • the SPE selects the protection link with the highest priority from all the backup protection links as a new effective protection link.
  • Step 102 The SPE receives a service packet, where the MSPW information is carried.
  • Step 103 The SPE is configured according to the correspondence between the MSPW information and the forwarding information of the MSPW protection link group, or the correspondence between the MSPW information and the forwarding information of other MSPWs except the forwarding information of the MSPW protection link group. Querying the forwarding information of the MSPW protection link group corresponding to the MSPW information query carried in the service message or the forwarding information of the MSPW except the forwarding information of the MSPW protection link group;
  • Step 104 Perform label encapsulation according to the forwarding information of the MSPW protection link group that is queried or the forwarding information of other MSPWs other than the forwarding information of the MSPW protection link group.
  • the step of performing label encapsulation according to the forwarding information of the queried MSPW protection link group includes: performing label encapsulation according to valid protection link forwarding information.
  • Embodiment 2 of the data forwarding processing method in the embodiment of the present invention, as shown in FIG. 2, includes the following steps:
  • Step 201 The operator side edge device (SPE) of the operator side configures an MSPW member forwarding table and an MSPW protection group table.
  • the MSPW member forwarding table and the MSPW protection group table in the embodiment 2 are a specific representation form, and the MSPW member forwarding table and the MSPW protection group table can be used to represent the multi-segment pseudowire (MSPW) information and the MSPW protection link group.
  • MSPW multi-segment pseudowire
  • MSPW member forwarding table and MSPW protection group table can also be integrated into one table, or divided into three tables by reasonable division.
  • the content of the MSPW member forwarding table is the MSPW protection group table label, the MSPW protection group index, the forwarding label, the PW label, and the outbound interface.
  • the content of the MSPW protection group table is the effective MSPW protection link sequence number, the number of protection links, and the protection chains. The protection link number of the road, the protection link forwarding label, the protection link MSPW label, and the outgoing interface.
  • An MSPW protection group table can be configured with multiple backup protection links to protect the protection relationship of an effective protection link (also known as the primary protection link) and set a priority.
  • the protection link with high priority is protected by MSPW.
  • the MSPW protection group table flag indicates that there is a corresponding MSPW protection group, the MSPW protection group index in the corresponding entry is valid information, and the forwarding label, the PW label, and the outbound interface are Invalid information;
  • the MSPW protection group table flag indicates that there is no corresponding MSPW protection group, the MSPW protection group index in the corresponding entry is invalid information, and the forwarding label, PW label, and outgoing interface are valid information.
  • the specific content of the MSPW member forwarding table and the MSPW protection group table in this embodiment is only an implementation form, but the content in each table is not limited in the embodiment of the present invention.
  • the MSPW member forwarding table includes the CE1-CE3 MSPW1, the MSPW protection group table label, the MSPW protection group index, the forwarding label, and the MSPW protection group.
  • the group index can query the MSPW protection group table.
  • the MSPW protection group table on SPE1 contains three MSPW protection links, namely SPE1-P1-SPE2, SPE1-P2-SPE2, SPE1-P3-SPE2, The SPE1-P1-SPE2 link has the highest priority, the sequence number is 1, followed by the SPE1-P2-SPE2 link, the sequence number is 2, and the last is the SPE1-P3-SPE2 link, the sequence number is 3.
  • the MSPW protection group table includes There are forwarding labels for these three protection links, protection link MSPW labels, and outbound interface information.
  • CE2-CE3 in Table 1 For the user service of the CE2-CE4 link, the MSPW member forwarding entry and the MSPW protection group entry structure can be analogized by the CE1-CE3 entry structure.
  • the MSPW link protection mechanism is the same as that of the SPE1 device.
  • the MSPW member forwarding table and the MSPW protection group table content structure on the SPE2 device can be based on the SPE1 device.
  • the MSPW member forwarding table and the MSPW protection group table are analogous.
  • three protection links are configured for the SPE1 device.
  • the protection link SPE1-P1-SPE2 fails, the effective MSPW protection link sequence number of the MSPW protection group table is modified to take precedence.
  • the second-level SPE1-P2-SPE2 link uses the forwarding label and the MSPW label of the SPE1-P2-SPE2 link to send the outgoing interface to the link to complete the MSPW protection group forwarding function.
  • the link SPE1-P2-SPE2 fails, it switches to the link SPE1-P3-SPE2 and forwards the information according to the link in the MSPW protection group table.
  • Step 202 Receive a service packet, where the MSPW label is carried;
  • Step 203 Query the MSPW member forwarding table to determine whether the MSPW protection group is configured, if yes, go to step 204, otherwise go to step 206;
  • the MSPW member forwarding table is queried according to the MSPW label, and the MSPW protection group table label is used to determine whether the MSPW protection group service is configured on the MSPW network. If the MSPW protection group service is configured, step 204 is performed. Query the MSPW protection group table and perform MSPW protection processing according to the MSPW protection group table. Otherwise, perform the normal MSPW forwarding processing flow.
  • the SPE1 device is used as an example.
  • the CE1-CE3 link queries the MSPW member forwarding table based on the MSPW label to determine whether the MSPW protection group service is configured on the MSPW network. If the MSPW protection group service is configured. Then, the MSPW protection group table is searched according to the MSPW protection group index in the MSPW member forwarding table, and the processing in step 204 is performed. Otherwise, the ordinary MSPW forwarding processing in step 206 is performed, that is, the existing standard processing procedure of the MSPW. The processing flow will be described again. Similarly, business processing between other CEs can be analogized.
  • Step 204 Query the MSPW protection group table.
  • the MSPW protection group table is searched according to the MSPW protection group index in the MSPW member forwarding table, and the MSPW protection group table includes the effective MSPW protection link sequence number, the number of protection links, the protection link sequence number, and the protection of each protection link. Link forwarding label, protection link MSPW label, and outgoing interface. According to the effective protection link sequence number, the corresponding protection link information is selected, that is, the protection link sequence number, the protection link forwarding label, the protection link MSPW label, and the outbound interface in the MSPW protection group table.
  • the MSPW protection group table on the SPE1 device is used as an example.
  • the network has three protection links: SPE1-P1-SPE2, SPE1-P2-SPE2, and SPE1-P3-SPE2. Therefore, the number of protection links in the MSPW protection group table is 3; the priorities of the three protection links are SPE1-P1-SPE2, SPE1-P2-SPE2, and SPE1-P3-SPE2 in descending order.
  • the MSPW protection group table protects the link number, the protection link forwarding label, the protection link MSPW label, and the outbound interface in the order of priority. The sequence number is the highest and the priority is the highest.
  • the SPE1-P1-SPE2 link is normal.
  • the SPE1-P1-SPE2 link with the protection link number 1 is selected for forwarding.
  • the SPE1-P1-SPE2 link fails the MSPW protection group
  • the number of the valid MSPW protection link in the table is changed to the SPE1-P2-SPE2 link with the second priority.
  • the effective MSPW protection link number of the MSPW protection group table is switched to 3. Forward the label and protect the protection link according to the protection link number 3 MSPW link label, the forwarding interface, thereby completing the functional MSPW protection group.
  • the MSPW protection group function of the SPE2 device can be analogized.
  • Step 205 Select the forwarding information of the effective protection link to perform the label encapsulation and forwarding process; and the forwarding information corresponding to the link sequence number to encapsulate and forward the packet label.
  • the MSPW protection group table contains the forwarding label, the MSPW label, and the outbound interface information of the protection link.
  • the packet encapsulates the forwarding label of the protection link.
  • the original MSPW label in the packet is replaced with the MSPW label of the MSPW protection group table.
  • the outbound interface of the link is protected and the forwarding function of the MSPW protection group is complete.
  • three protection links are configured for the SPE1 device.
  • the protection link SPE1-P1-SPE2 fails, the effective MSPW protection link sequence number of the MSPW protection group table is modified to take precedence.
  • the forwarding label of the link and the MSPW label are sent to the outbound interface of the link to complete the MSPW protection group forwarding function.
  • the link SPE1-P2-SPE2 fails, it switches to the link SPE1-P3-SPE2 and forwards the information according to the link in the MSPW protection group table.
  • Step 206 Normal MSPW forwarding processing.
  • the label encapsulation and forwarding process is performed according to the forwarding information in the MSPW member forwarding table.
  • an embodiment of the present invention further provides an operator-side operator edge device (SPE) 400.
  • the SPE 400 includes: a data forwarding information management unit 401, and a message receiving unit 402. a query unit 403, and a packet encapsulation forwarding unit 404, where
  • the data forwarding information management unit 401 is configured to: configure data forwarding information, where the data forwarding information includes a correspondence between the multi-segment pseudowire (MSPW) information and the forwarding information of the MSPW protection link group, or the MSPW information and the MSPW protection. Correspondence of forwarding information of other MSPWs other than the forwarding information of the link group;
  • MSPW multi-segment pseudowire
  • the message receiving unit 402 is configured to: receive a service packet, where the service packet carries the MSPW information;
  • the query unit 403 is configured to: correspond to the correspondence between the MSPW information and the forwarding information of the MSPW protection link group, or the correspondence between the MSPW information and the forwarding information of other MSPWs except the forwarding information of the MSPW protection link group. And the forwarding information of the MSPW protection link group corresponding to the MSPW information carried in the service packet or the forwarding information of other MSPWs other than the forwarding information of the MSPW protection link group;
  • the packet encapsulation and forwarding unit 404 is configured to perform label encapsulation and forwarding according to the forwarding information of the corresponding MSPW protection link group or the forwarding information of other MSPWs except the forwarding information of the MSPW protection link group.
  • the forwarding information of the MSPW protection link group includes forwarding information of at least one active protection link and forwarding information of at least one backup protection link.
  • the packet encapsulation and forwarding unit is configured to perform label encapsulation according to the forwarding information of the queried MSPW protection link group according to the following manner: forwarding information according to the effective protection link Label packaging.
  • the data forwarding information management unit is further configured to configure the data forwarding information as follows: When determining that the current active protection link is faulty, selecting a backup protection link as the new effective protection link.
  • the SPE selects the highest priority protection link from all the backup protection links as the new effective protection link.
  • a program instructing the associated hardware such as a read-only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions. The form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.
  • the embodiment of the present invention can improve the forwarding performance of the PWE3 MSPW function.
  • the service traffic can be quickly switched when the MSPW link fails, thereby effectively protecting the service traffic and preventing the service traffic from being disconnected.
  • the flow increases the robustness of the MSPW network and can better meet the needs of network operators. Therefore, it has strong industrial practicality.

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Abstract

一种数据转发处理方法及运营商侧运营商边缘设备（SPE），包括如下步骤：SPE配置数据转发信息，数据转发信息包括多段伪线（MSPW）信息与MSPW保护链路组的转发信息或与除MSPW保护链路组的转发信息之外的其他MSPW的转发信息的对应关系（101）；SPE接收业务报文（102），所述报文携带MSPW信息；SPE査询到MSPW保护链路组的转发信息或除MSPW保护链路组的转发信息之外的其他MSPW的转发信息（103）；SPE根据査询到的MSPW保护链路组的转发信息或除MSPW保护链路组的转发信息之外的其他MSPW的转发信息进行标签封装及转发（104）。

Description

数据转发处理的方法及设备
技术领域
本发明涉及网络数据通信技术， 尤其涉及一种数据转发处理方法及运营 商侧运营商边缘设备 ( SPE ) 。 背景技术
边缘到边缘的伪线仿真（PWE3 , Pseudo Wire Emulation Edge-to-Edge ) 是在分组交换网 （IP/MPLS )上提供隧道， 以便仿真一些业务（如， 帧中继 ( FR, Frame Relay )、 异步传输模式（ATM, Asynchronous Transfer Mode ) 、 以太网（Ethernet )、时分复用同步光纤网 /同步数字体系（ TDM SONET/SDH, Time Division Multiplex Synchronous Optical Network/Synchronous Digital Hierarchy, ) ) 的二层虚拟专用网络 (VPN, Virtual Private Network)协议， 通 过此协议可以将传统的网络与分组交换网络互连起来， 从而实现资源的共用 和网络的拓展。
PWE3是对 L2VPN Martini协议的扩展， 增加多段伪线（ MSPW, Multi Segment Pseudo Wires)功能， 扩展了组网方式。 MSPW是指用户侧的提供商 边缘设备（U-PE, 也称为用户接入设备）与 U-PE之间存在多个 PW。 多跳中 的 U-PE和单跳中的 U-PE转发机制相同， 只是多跳转发时需要在交换 PE ( S-PE , Switching PE )上做 PW标签（Label )层面的标签交换。 在大多数 情况下单跳 PW就可以满足实际需求， 但是在以下几种情况下单跳 PW就不 能满足需求， 需要釆用多跳 PW : 两台 PE 之间不在同一个自主系统 ( Autonomous System )域中， 且不能在两台 PE之间建立信令连接或者建立 隧道； 两台 PE上的信令不同， 比如一端运行 LDP, —端运行 RSVP; 如果接 入设备可以运行 MPLS, 但又没有能力建立大量的 LDP会话， 这时可以把用 户面对供应商的设备 ( UFPE, User Facing Provider Devices )作为 U-PE, 把 高性能的设备 S-PE作为 LDP会话的交换节点， 类似信令反射器。
MSPW 功能能够降低对接入设备支持的标签分发协议 （LDP , Label Distribution Protocol )连接数目的要求， 即降低了接入节点的 LDP会话的开 销； 多跳的接入节点满足 PW的汇聚功能，使得网络更加灵活， 适合分级（接 入、 汇聚和核心） 。 支持更多的电信低速时分复用（TDM, Time Division Multiplex)接口。
在 PWE3应用中的 MSPW网络中， 当中间 S-PE之间设备出现故障时， 造成数据报文无法顺利转发， 影响业务服务质量。
发明内容
本发明实施例所要解决的技术问题是提供一种数据转发处理方法及运营 商侧运营商边缘设备（SPE ) ， 解决中间设备出现故障时， 数据报文无法转 发的问题。
为解决上述技术问题， 釆用以下技术方案：
本发明实施例提供了一种数据转发处理方法， 包括：
运营商侧运营商边缘设备（SPE ) 配置数据转发信息， 所述数据转发信 息包括多段伪线（MSPW )信息与 MSPW保护链路组的转发信息的对应关系 或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW的 转发信息的对应关系；
所述 SPE接收业务报文， 所述业务报文中所述携带 MSPW信息； 所述 SPE根据所述 MSPW信息与 MSPW保护链路组的转发信息的对应 关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信息的对应关系， 查询到与所述业务 "^文中携带的所述 MSPW 信息查询对应的 MSPW保护链路组的转发信息或除 MSPW保护链路组的转 发信息之外的其他 MSPW的转发信息； 以及
所述 SPE根据查询到的 MSPW保护链路组的转发信息或除 MSPW保护 链路组的转发信息之外的其他 MSPW的转发信息进行标签封装及转发。
可选地，所述 MSPW保护链路组的转发信息包括至少一条有效保护链路 的转发信息以及至少一条备用保护链路的转发信息。
相应地，所述根据及转发的 MSPW保护链路组的转发信息进行标签封装 的步骤包括： 根据有效的保护链路转发信息进行标签封装。 可选地， 所述方法还包括：
所述 SPE判定当前有效保护链路发生故障时， 选择一条备用保护链路作 为新的有效保护链路。
可选地， 所述 SPE从所有备用保护链路中选择优先级最高的保护链路作 为新的有效保护链路。
本发明实施例提供了一种运营商侧运营商边缘设备 ( SPE ) , 该 SPE包 括： 数据转发信息管理单元、 报文接收单元、 查询单元， 以及报文封装转发 单元， 其中，
所述数据转发信息管理单元设置成： 配置数据转发信息， 所述数据转发 信息包括多段伪线（MSPW )信息与 MSPW保护链路组的转发信息的对应关 系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW 的转发信息的对应关系；
所述报文接收单元设置成： 接收业务报文， 所述业务报文中携带所述 MSPW信息；
所述查询单元设置成： 根据所述 MSPW信息与 MSPW保护链路组的转 发信息的对应关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之 外的其他 MSPW 的转发信息的对应关系， 查询到与所述业务 文中携带的 MSPW信息查询对应的 MSPW保护链路组的转发信息或除 MSPW保护链路 组的转发信息之外的其他 MSPW的转发信息； 以及
所述报文封装转发单元设置成：根据查询到的 MSPW保护链路组的转发 信息或除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信息进行 标签封装及转发。
可选地，所述 MSPW保护链路组的转发信息包括至少一条有效保护链路 的转发信息以及至少一条备用保护链路的转发信息。
可选地， 所述报文封装转发单元设置成按照如下方式根据查询到的
MSPW保护链路组的转发信息进行标签封装： 根据有效的保护链路转发信息 进行标签封装。
可选地， 数据转发信息管理单元还设置成按照如下方式配置数据转发信 息： 判定当前有效保护链路发生故障时， 选择一条备用保护链路作为新的有 效保护链路。
可选地， 所述 SPE从所有备用保护链路中选择优先级最高的保护链路作 为新的有效保护链路。
本发明技术方案可以提高 PWE3 MSPW 功能的转发性能， 通过实现
MSPW的 MSPW保护组功能， 可以在 MSPW链路发生故障时， 业务流量可 以快速进行切换， 从而有效的保护了业务流量， 防止业务流量断流， 增加了 MSPW网络的健壮性， 可以更好的满足网络运营商的需求。 附图概述
图 1是本发明实施例的数据转发处理方法实施例 1的流程图；
图 2是本发明实施例的数据转发处理方法实施例 2的流程图；
图 4是本发明实施例的运营商侧运营商边缘设备 ( SPE ) 实施例的模块 结构示意图。
本发明的较佳实施方式
下面结合附图和具体实施例对本发明所述技术方案作详细描述， 以使本 领域的技术人员可以更好的理解本发明并能予以实施， 但所举实施例不作为 对本发明的限定。 需要说明的是， 在不冲突的情况下， 本申请中的实施例及 实施例中的特征可以相互组合。
实施例 1
本发明实施例数据转发处理方法实施例 1 , 如图 1所示， 该方法包括： 步骤 101 : 运营商侧运营商边缘设备（SPE )配置数据转发信息， 所述数 据转发信息包括多段伪线（ MSPW )信息与 MSPW保护链路组的转发信息的 对应关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信息的对应关系； 所述 MSPW保护链路组的转发信息包括至少一条有效保护链路的转发 信息以及至少一条备用保护链路的转发信息。
本发明实施例对于体现多段伪线（MSPW )信息与 MSPW保护链路组的 转发信息或与除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信 息的对应关系的形式不做限定，只要能基于 MSPW信息找到对应的转发信息 即可。
一般地， 没有保护组时， 转发信息包括转发标签、 PW标签、 出接口。 存在保护组时， 转发信息包括转发标签、 MSPW标签、 出接口。
所述 SPE管理数据转发信息的步骤包括：
所述 SPE判定当前有效保护链路发生故障时， 选择一条备用保护链路作 为新的有效保护链路。
可选地， 所述 SPE从所有备用保护链路中选择优先级最高的保护链路作 为新的有效保护链路。 当然也可随机从备用保护链路中选择。
步骤 102: 所述 SPE接收业务报文， 其中携带 MSPW信息；
步骤 103: 所述 SPE根据所述 MSPW信息与 MSPW保护链路组的转发 信息的对应关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外 的其他 MSPW的转发信息的对应关系，查询到与所述业务 "^文中携带的所述 MSPW信息查询对应的 MSPW保护链路组的转发信息或除 MSPW保护链路 组的转发信息之外的其他 MSPW的转发信息；
步骤 104:根据查询到的 MSPW保护链路组的转发信息或除 MSPW保护 链路组的转发信息之外的其他 MSPW的转发信息进行标签封装。
所述根据查询到的 MSPW保护链路组的转发信息进行标签封装的步骤 包括： 根据有效的保护链路转发信息进行标签封装。
实施例 2
本发明实施例的数据转发处理方法实施例 2, 如图 2所示， 包括以下步 骤：
步骤 201 : 运营商侧运营商边缘设备 ( SPE ) 配置 MSPW成员转发表和 MSPW保护组表； 该实施例 2中的 MSPW成员转发表和 MSPW保护组表是一种具体的表 现形式， 利用该 MSPW成员转发表和 MSPW保护组表可以体现多段伪线 ( MSPW )信息与 MSPW保护链路组的转发信息或与除 MSPW保护链路组 之外的其他 MSPW的转发信息的对应关系。
当然以上 MSPW成员转发表和 MSPW保护组表也可整合为一个表体现， 或通过合理拆分为三个表。
MSPW成员转发表的内容是 MSPW保护组表标记、 MSPW保护组索引、 转发标签、 PW标签、 出接口； MSPW保护组表的内容是有效 MSPW保护链 路序号、 保护链路数目、 以及各保护链路的保护链路序号、 保护链路转发标 签、 保护链路 MSPW标签、 出接口。
其中保护链路数目可选。一个 MSPW保护组表中可以配置多条备用保护 链路保护一条有效保护链路（也可称为主保护链路） 的保护关系， 并设置有 优先级， 优先级高的保护链路在 MSPW保护表结构的前面。
可理解地， 在 MSPW成员转发表中， 若 MSPW保护组表标记表示存在 对应的 MSPW保护组， 则对应表项中的 MSPW保护组索引为有效信息， 而 转发标签、 PW标签、 出接口则为无效信息； 相应地， 若 MSPW保护组表标 记表示不存在对应的 MSPW保护组， 则对应表项中的 MSPW保护组索引为 无效信息， 而转发标签、 PW标签、 出接口则为有效信息。
本实施例给出的 MSPW成员转发表和 MSPW保护组表的具体内容只是 一种实现形式， 但本发明实施例对各表中的内容不做限定。
例如， 在图 3所示的组网中， 以 SPE1设备为例， MSPW成员转发表包 括 CE1-CE3 MSPW1、 MSPW保护组表标记、 MSPW保护组索引、转发标签、 了 MSPW保护组， 通过 MSPW保护组索引可以查询 MSPW保护组表； 根据 图 3的组网， SPE1上 MSPW保护组表含有三个 MSPW保护链路， 分别是 SPE1-P1-SPE2 , SPE1-P2-SPE2, SPE1-P3-SPE2, SPE1-P1-SPE2链路的优先 级最高，序号为 1；其次是 SPE1-P2-SPE2链路，序号为 2;最后是 SPE1-P3-SPE2 链路， 序号为 3; 同时 MSPW保护组表包括有这三个保护链路的转发标签、 保护链路 MSPW标签、出接口信息。同理，对于表 1中的 CE1-CE4、CE2-CE3、 CE2-CE4链路的用户业务， 其 MSPW成员转发表项和 MSPW保护组表项结 构可以通过 CE1-CE3的表项结构进行类推。
对于 SPE2设备， 在 CE3-CE1链路上方向上和 SPE1设备上的 CE1-CE3 方向 MSPW链路保护机制是一致的， SPE2设备上的 MSPW成员转发表和 MSPW保护组表内容结构可以根据 SPE1设备的 MSPW成员转发表和 MSPW 保护组表进行类推。
表 1： MSPW成员转发表（ SPE1 )
Figure imgf000009_0001
Figure imgf000009_0002
表 3: MSPW成员转发表（SPE2 )
Figure imgf000009_0003
MSPW4 标记
表 4: MSPW保护组表（SPE2 )
Figure imgf000010_0001
例如， 图 3所示的组网中， 对于 SPE1设备， 配置有三个保护链路， 在保 护链路 SPE1-P1-SPE2发生故障时， MSPW保护组表的有效 MSPW保护链路 序号则修改为优先级第二的 SPE1-P2-SPE2链路，转发信息使用 SPE1-P2-SPE2 链路的转发标签、 MSPW标签， 发送到此链路的出接口， 完成 MSPW保护组 转发功能。 同理， 在链路 SPE1-P2-SPE2 发生故障时， 则切换到链路 SPE1-P3-SPE2, 按照 MSPW保护组表中此链路的信息进行转发。
步骤 202: 接收业务报文， 其中携带 MSPW标签；
步骤 203: 查询 MSPW成员转发表判断是否配置 MSPW保护组，若是则 执行步骤 204, 否则执行步骤 206;
该步骤中， 根据 MSPW标签查询 MSPW成员转发表， 根据 MSPW成员 转发表的 MSPW保护组表标记， 判断 MSPW网络是否配置了 MSPW保护组 业务， 如果配置了 MSPW保护组业务， 则执行步骤 204, 即查询 MSPW保护 组表，根据 MSPW保护组表进行 MSPW保护处理；反之，则执行普通 MSPW 转发处理流程。
例如，图 3所示的组网中，以 SPE1设备为例， CE1-CE3链路，根据 MSPW 标签查询 MSPW成员转发表， 判断 MSPW网络是否配置了 MSPW保护组业 务， 如果配置了 MSPW保护组业务， 则需要根据 MSPW成员转发表中的 MSPW保护组索引查找 MSPW保护组表， 进行步骤 204的处理； 反之， 执行 步骤 206普通 MSPW转发处理， 即 MSPW的已有标准处理流程， 本专利不 再描述其处理流程。 同理， 其它 CE之间的业务处理可以类推。
步骤 204: 查询 MSPW保护组表；
该步骤中， 根据 MSPW成员转发表中的 MSPW保护组索引查找 MSPW 保护组表， MSPW保护组表含有有效 MSPW保护链路序号、 保护链路数目、 保护链路序号、以及各保护链路的保护链路转发标签、保护链路 MSPW标签、 出接口。 根据有效保护链路序号选择所对应的保护链路信息， 即 MSPW保护 组表中的保护链路序号、保护链路转发标签、保护链路 MSPW标签、 出接口。
例如， 图 2所示的组网中， 以 SPE1设备上的 MSPW保护组表为例， 网 络中配置了 SPE1-P1-SPE2、 SPE1-P2-SPE2, SPE1-P3-SPE2三个保护链路， 故 MSPW保护组表中的保护链路数目为 3; 这三个保护链路的优先级从高到 低的顺序依次为 SPE1-P1-SPE2、 SPE1-P2-SPE2, SPE1-P3-SPE2, 故 MSPW 保护组表中保护链路序号、 保护链路转发标签、 保护链路 MSPW标签、 出接 口部分依次按照优先级顺序进行排序， 即序号最高， 优先级最高； 在 SPE1-P1-SPE2链路正常时， MSPW保护组表中有效 MSPW保护链路序号为 1 ,则选择保护链路序号为 1的 SPE1-P1-SPE2链路进行转发；当 SPE1-P1-SPE2 链路发生故障时， MSPW保护组表中有效 MSPW保护链路序号则修改为优先 级第二的 SPE1-P2-SPE2链路； 若 SPE1-P3-SPE2也发生故障时， 则将 MSPW 保护组表的有效 MSPW保护链路序号切换为 3 , 按照保护链路序号 3的保护 链路转发标签、 保护链路 MSPW标签、 出接口进行转发， 从而完成 MSPW 保护组的功能。 同理， SPE2设备的 MSPW保护组功能可以类推。
步骤 205: 选择有效保护链路的转发信息进行标签封装及转发流程； 链路序号所对应的转发信息进行报文标签封装及转发流程。 MSPW保护组表 中含有保护链路的转发标签、 MSPW标签和出接口信息， 报文封装保护链路 的转发标签， 将报文中原有的 MSPW标签替换为 MSPW保护组表的 MSPW 标签， 发送到保护链路出接口， 完成 MSPW保护组转发功能。
例如， 图 3所示的组网中， 对于 SPE1设备， 配置有三个保护链路， 在保 护链路 SPE1-P1-SPE2发生故障时， MSPW保护组表的有效 MSPW保护链路 序号则修改为优先级第二的 SPE1-P2-SPE2链路，转发信息使用 SPE1-P2-SPE2 链路的转发标签、 MSPW标签， 发送到此链路的出接口， 完成 MSPW保护组 转发功能。 同理， 在链路 SPE1-P2-SPE2 发生故障时， 则切换到链路 SPE1-P3-SPE2, 按照 MSPW保护组表中此链路的信息进行转发。
步骤 206: 普通 MSPW转发处理。
相应地， 根据 MSPW成员转发表中的转发信息进行标签封装及转发流 程。
为了实现上述方法， 本发明实施例还提供了一种运营商侧运营商边缘设 备（SPE ) 400, 如图 4所示， 该 SPE 400包括： 数据转发信息管理单元 401、 4艮文接收单元 402、 查询单元 403 , 以及 ^艮文封装转发单元 404, 其中，
所述数据转发信息管理单元 401设置成： 配置数据转发信息， 所述数据 转发信息包括多段伪线（MSPW )信息与 MSPW保护链路组的转发信息的对 应关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信息的对应关系；
所述报文接收单元 402设置成： 接收业务报文， 业务报文中携带 MSPW 信息；
所述查询单元 403设置成： 根据所述 MSPW信息与 MSPW保护链路组 的转发信息的对应关系或所述 MSPW信息与除 MSPW保护链路组的转发信 息之外的其他 MSPW的转发信息的对应关系，查询到与所述业务报文中携带 的所述 MSPW信息对应的 MSPW保护链路组的转发信息或除 MSPW保护链 路组的转发信息之外的其他 MSPW的转发信息；
所述报文封装转发单元 404设置成：根据查询到对应的 MSPW保护链路 组的转发信息或除 MSPW保护链路组的转发信息之外的其他 MSPW的转发 信息进行标签封装及转发。
相应地，所述 MSPW保护链路组的转发信息包括至少一条有效保护链路 的转发信息以及至少一条备用保护链路的转发信息。
可选地， 所述报文封装转发单元设置成按照如下方式根据查询到的 MSPW保护链路组的转发信息进行标签封装： 根据有效的保护链路转发信息 进行标签封装。
可选地， 数据转发信息管理单元还设置成按照如下方式配置数据转发信 息： 判定当前有效保护链路发生故障时， 选择一条备用保护链路作为新的有 效保护链路。
所述 SPE从所有备用保护链路中选择优先级最高的保护链路作为新的有 效保护链路。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现， 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
以上所述， 仅为本发明的一种具体实施方式， 但本发明的保护范围并不 局限于此， 相关熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可 轻易想到的变化或替换， 都应该涵盖在本发明的保护范围之内。 因此， 本发 明的保护范围应该以权利要求的保护范围为准。
工业实用性
本发明实施例可以提高 PWE3 MSPW功能的转发性能，通过实现 MSPW 的 MSPW保护组功能， 可以在 MSPW链路发生故障时， 业务流量可以快速 进行切换， 从而有效的保护了业务流量， 防止业务流量断流， 增加了 MSPW 网络的健壮性， 可以更好的满足网络运营商的需求。 因此具有很强的工业实 用性。

Claims

权 利 要 求 书
1、 一种数据转发处理方法， 包括：
运营商侧运营商边缘设备（SPE ) 配置数据转发信息， 所述数据转发信 息包括多段伪线（MSPW )信息与 MSPW保护链路组的转发信息的对应关系 或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW的 转发信息的对应关系；
所述 SPE接收业务报文， 所述业务报文中携带所述 MSPW信息； 所述 SPE根据所述 MSPW信息与 MSPW保护链路组的转发信息的对应 关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信息的对应关系， 查询到与所述业务 "^文中携带的所述 MSPW 信息对应的 MSPW保护链路组的转发信息或除 MSPW保护链路组的转发信 息之外的其他 MSPW的转发信息； 以及
所述 SPE根据查询到的 MSPW保护链路组的转发信息或除 MSPW保护 链路组的转发信息之外的其他 MSPW的转发信息进行标签封装及转发。
2、 如权利要求 1所述的数据转发处理方法， 其中： 所述 MSPW保护链 路组的转发信息包括至少一条有效保护链路的转发信息以及至少一条备用保 护链路的转发信息。
3、 如权利要求 2 所述的数据转发处理方法， 其中： 所述根据查询到的 MSPW保护链路组的转发信息进行标签封装的步骤包括： 根据有效的保护链路转发信息进行标签封装。
4、 如权利要求 2所述的数据转发处理方法， 该方法还包括：
所述 SPE判定当前有效保护链路发生故障时， 选择一条备用保护链路作 为新的有效保护链路。
5、 如权利要求 4所述的数据转发处理方法， 其中： 所述 SPE从所有备 用保护链路中选择优先级最高的保护链路作为新的有效保护链路。
6、 一种运营商侧运营商边缘设备（SPE ) , 包括： 数据转发信息管理单 元、 文接收单元、 查询单元， 以及 文封装转发单元， 其中，
所述数据转发信息管理单元设置成： 配置数据转发信息， 所述数据转发 信息包括多段伪线（MSPW )信息与 MSPW保护链路组的转发信息的对应关 系或所述 MSPW信息与除 MSPW保护链路组的转发信息之外的其他 MSPW 的转发信息的对应关系；
所述报文接收单元设置成： 接收业务报文， 所述业务报文中携带所述 MSPW信息；
所述查询单元设置成： 根据所述 MSPW信息与 MSPW保护链路组的转 发信息的对应关系或所述 MSPW信息与除 MSPW保护链路组的转发信息之 外的其他 MSPW的转发信息的对应关系，查询到与所述业务 >¾文中携带的所 述 MSPW信息对应的 MSPW保护链路组的转发信息或除 MSPW保护链路组 的转发信息之外的其他 MSPW的转发信息； 以及
所述报文封装转发单元设置成：根据查询到的 MSPW保护链路组的转发 信息或除 MSPW保护链路组的转发信息之外的其他 MSPW的转发信息进行 标签封装及转发。
7、 如权利要求 6所述的 SPE, 其中： 所述 MSPW保护链路组的转发信 息包括至少一条有效保护链路的转发信息以及至少一条备用保护链路的转发 信息。
8、 如权利要求 7所述的 SPE, 其中： 所述报文封装转发单元设置成按照 如下方式根据查询到的 MSPW保护链路组的转发信息进行标签封装：根据有 效的保护链路转发信息进行标签封装。
9、 如权利要求 7所述的 SPE, 其中， 数据转发信息管理单元还设置成按 照如下方式配置数据转发信息： 判定当前有效保护链路发生故障时， 选择一 条备用保护链路作为新的有效保护链路。
10、 如权利要求 9所述的 SPE, 其中： 所述 SPE从所有备用保护链路中 选择优先级最高的保护链路作为新的有效保护链路。
PCT/CN2014/078661 2013-07-29 2014-05-28 数据转发处理的方法及设备 WO2014177100A1 (zh)

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