CN103067275B - A method and system for establishing a label switched path - Google Patents

A method and system for establishing a label switched path Download PDF

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CN103067275B
CN103067275B CN 201310007761 CN201310007761A CN103067275B CN 103067275 B CN103067275 B CN 103067275B CN 201310007761 CN201310007761 CN 201310007761 CN 201310007761 A CN201310007761 A CN 201310007761A CN 103067275 B CN103067275 B CN 103067275B
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node
lsp
link
signaling message
fa
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CN103067275A (en )
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钱佳
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中兴通讯股份有限公司
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Abstract

本发明公开了一种标签交换路径(LSP)的建立方法,所述方法包括:LSP的首节点根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息;LSP的首节点根据得到的路径信息组织携带扩展后的链路标志信息的第一信令消息逐跳发送给下游节点,直到LSP的尾节点接收到所述第一信令消息并配置传送平面交叉成功;LSP的尾节点收到所述第一信令消息并配置传送平面交叉成功后,组织第二信令消息逐跳发送给上游节点,直到LSP的首节点接收到所述第二信令消息并配置传送平面交叉成功。 The present invention discloses a label switched path (LSP) is established, the method comprising: a first node of the LSP and topology information required for computing LSP to be established route information through the management plane in accordance with the request; the first node according to the LSP link flags in the route information obtained tissue expansion carries first signaling message hop by hop information is sent to the downstream node until the end node of the LSP receiving the first signaling message and configure the transport plane intersecting successful; LSP tail after the node receives the first signaling message and transmission plane intersecting the configuration is successful, the second tissue signaling message is sent to the upstream node hop by hop until the first node of the LSP receiving the second signaling message and configure the transport plane intersecting success. 本发明还同时公开了一种LSP的建立系统,采用本发明,增加了链路重路由属性,也丰富了LSP的类型,达到更智能的保护恢复的效果。 The present invention also discloses a system for establishing LSP, the present invention increases the link rerouting attributes, but also enrich the LSP type, and achieve more intelligent protective recovery.

Description

一种标签交换路径的建立方法及系统 A method and system for establishing a label switched path

技术领域 FIELD

[0001] 本发明涉及通信领域的标签交换路径(LSP,Label Switching Path)技术,尤其涉及一种LSP的建立方法及系统。 [0001] The present invention relates to communication field label switched path (LSP, Label Switching Path) technology, particularly to a method and system for establishing an LSP.

背景技术 Background technique

[0002] 随着网络大融合和网络扁平化的发展,原有不同类型网络之间的界限逐渐模糊,在统一控制平面下的广义的多层网络成为人们追求的目标,最终实现不同层网络间灵活高效的调度,以优化网络业务的管理和提高网络的生存性。 [0002] With a large network and convergence network of the flat development, the boundaries between different types of networks existing gradually blurred, generalized multilayer network under the unified control plane become a goal, and ultimately between the different layers of the network flexible and efficient scheduling to optimize network traffic management and improved network survivability.

[0003] 在网络发生故障时,及时进行故障切换,保障网络应用不受影响。 [0003] When a network failure occurs, promptly failover, network security application affected. 具体的,RFC (Request For Comments) 4427 中将LSP 中的保护恢复(Recovery)分为:链路(本地)保护恢复(Span recovery)、段保护恢复(Segment recovery)、以及端到端保护恢复(End-to-End recovery);其中,链路保护恢复是通过对LSP两个节点间的链路的保护恢复来达到对LSP的保护,所述链路保护恢复又可细分为链路保护和链路恢复两种方式。 Specifically, RFC (Request For Comments) Protection and Restoration (Recovery) in the LSP 4427 is divided into: a link (local) Protection and Restoration (Span recovery), protection and restoration segment (Segment recovery), and a recovery end protection ( End-to-End recovery); wherein the link protection and restoration of the restoration by the protection link between the two nodes LSP to the LSP to protect, restore the link protection can be divided into link protection and link recovery in two ways.

[0004] RFC 4202在通用多协议标志交换协议(GMPLS,Generalized MultiprotocolLabelSwitching)的路由扩展中定义了链路保护类型来表示链路的保护能力;RFC 3471在GMPLS的信令功能描述中,定义了保护(PROTECT1N)对象,其中,包含的链路标志(Link Flags)表示LSP链路的保护能力。 [0004] RFC 4202 defines the link protection type of Generalized Multi Protocol Label Switching (GMPLS, Generalized MultiprotocolLabelSwitching) to represent the extended routing link protection; RFC 3471 in the GMPLS signaling functions described in the definition of protection (PROTECT1N) objects, which contained a link mark (link flags) represents protection LSP link.

[0005] 现有标准将服务层的属性归结到客户层链路的链路保护属性中,且链路属性目前只有保护相关属性,如:无保护、专用1+1保护、专用1:1保护、共享保护、增强保护;但是,这些链路保护属性只能描述具有保护的链路,如果为客户层提供服务的服务层业务具有恢复属性或保护恢复结合的属性,则其形成的链路具有的属性目前没有定义。 [0005] The properties of the existing standard service link layer is attributed to the protective properties of the client layer link, and the link protection attributes currently only relevant properties, such as: unprotected, dedicated 1 + 1 protection, Dedicated 1: 1 protection , shared protection, enhanced protection; however, these properties can only be link protection have described protection link, if the client layer service business service layer protection and restoration having recovery properties or binding properties, it forms a link having the property is currently undefined.

[0006] 目前,通过开放式最短路径优先(0SPF,Open Shortest Path First)洪泛机制将链路保护类型等信息洪泛给全网节点,各节点的路径计算单元结合建立请求,选择符合链路保护类型的链路,并通过资源预留协议(RSVP,ResourceReservat1n Protocol)信令在相应的链路上建立LSP,这样,建立的LSP就能具有RFC 4427中定义的链路保护能力。 [0006] Currently, the Open Shortest Path First (0SPF, Open Shortest Path First) flooding mechanism link protection type of information to flood the whole network nodes, each node of the path computation unit in conjunction with establishment request, chosen for link the link protection type, and (RSVP, ResourceReservat1n protocol) signaling protocol established by the resource reservation on the respective LSP link, such, can have a link established LSP protection as defined in RFC 4427.

[0007] 在多层网络中,包括客户层和服务层,客户层LSP所使用的链路可由服务层LSP所提供,相应的,该链路的保护(恢复)能力也就由服务层LSP的保护(恢复)能力所体现;在多层网络中,在层的边界节点间设有一条LSP,如果将该LSP作为客户层的流量工程(TE,Traffic Engineering)链路进行洪泛,那么,该LSP可称为转发邻接标签交换路径(FA-LSP,Forwarding Adjacency LSP),而该TE链路可称为FA ;FA的端点之间不存在路由邻接关系,但存在信令相邻关系。 [0007] In the multi-layer network, including customer and service layers, the client layer LSP link used by the service layer to provide the LSP, corresponding to the protection link (restored) by the service capacity will LSP layer protection (recovery) capabilities embodied; in the multi-layer network, the inter-layer has a boundary node LSP, if LSP is used as the client layer traffic Engineering (TE, traffic Engineering) link for flooding, then the LSP may be referred to as label switched path forwarding adjacency (FA-LSP, forwarding adjacency LSP), which may be referred to as a TE link FA; routing adjacency relationship exists between the end of FA, but the presence of adjacent signaling relationship.

[0008] 但是,现有协议中没有提到FA的链路保护类型该如何取值;同时,现有协议中也没有提及如何建立具有链路恢复能力的LSP和具有链路保护恢复结合能力的LSP。 [0008] However, the conventional link protection type protocols not mentioned how the FA value; Meanwhile, in the existing protocol does not mention how to create LSP have a link having link resilience and recovery protection binding capacity the LSP.

发明内容 SUMMARY

[0009] 有鉴于此,本发明的主要目的在于提供一种LSP的建立方法及装置,能够建立具有链路恢复能力、或链路保护恢复结合能力的LSP,丰富LSP的类型,从而实现更智能的保护恢复方式。 [0009] In view of this, the main object of the present invention is to provide a method and apparatus for establishing an LSP, a link can be established with recovery LSP, or binding capacity link protection and restoration, LSP rich type, enabling smarter the protection and restoration way.

[0010] 为达到上述目的,本发明的技术方案是这样实现的: [0010] To achieve the above object, the technical solution of the present invention is implemented as follows:

[0011] 本发明提供了一种标签交换路径LSP的建立方法,所述方法包括: [0011] The present invention provides a method for establishing a label switched path LSP, the method comprising:

[0012] LSP的首节点根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息; [0012] The first node of the LSP path LSP information and network topology information required to be established through the calculation according to the request management plane;

[0013] LSP的首节点根据得到的路径信息组织携带扩展后的链路标志信息的第一信令消息,并将所述第一信令消息逐跳发送给下游节点,直到LSP的尾节点接收到所述第一信令消息并配置传送平面交叉成功;其中,所述扩展后的链路标志信息包括链路重路由类型信息以及链路保护恢复结合的类型信息; [0013] The first node of the LSP path information after the link mark tissue obtained first signaling message carrying the extension information and the first signaling message sent to the downstream node hop by hop until the tail node receiving the LSP the first signaling message and to configure the transport plane intersecting successfully; wherein the link flag and the extended information includes the link type information and type information of re-routing restoration binding link protection;

[0014] LSP的尾节点收到第一信令消息并配置传送平面交叉成功后,组织第二信令消息并将第二信令消息逐跳发送给上游节点,且各上游节点根据所述第二信令信息配置传送平面交叉成功,直到LSP的首节点接收到第二信令消息并配置传送平面交叉成功。 [0014] LSP of the end node and configured to receive a first signaling message after a successful transmission plane intersecting, tissue and the second signaling message by the second signaling message is sent to the hop upstream node, and each node according to the upstream section two plane intersecting the signaling information transmitted successfully configured, until the first node of the LSP receives the second signaling message and configure the transport plane intersecting success.

[0015] 上述方案中,所述LSP的首节点根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息之前,该方法还包括: Before [0015] In the above embodiment, the head node of the LSP path LSP information required to be established through the management plane is calculated according to the request and network topology information, the method further comprising:

[0016] 通过开放式最短路径优先洪泛机制将链路保护类型信息、链路重路由类型信息洪泛到全网节点。 [0016] Priority flooding mechanism by flooding the Open Shortest Path link protection type information, link type information to reroute the entire network node.

[0017] 上述方案中,所述将第一信令消息逐跳发送给下游节点之前,该方法还包括: [0017] In the above embodiment, the first signaling message hop by hop to the downstream node before sending, the method further comprising:

[0018] 判断将第一信令消息逐跳发送给下游节点的节点是否存在满足条件的链路,如果存在满足条件的链路,则在所述链路上申请并预留资源,并将第一信令消息发送给与其相邻的下游节点;否则,确定是否需要在所述节点建立转发邻接FA。 [0018] Analyzing the first node hop by hop signaling message sent to a downstream node is a link satisfying the condition exists, if the condition of a link exists, and the application to reserve resources on the link, and the first sending a signaling message to the downstream node adjacent thereto; otherwise, determining whether to set the FA forwarding node adjacency.

[0019] 上述方案中,所述确定是否需要在所述节点建立FA,为: [0019] In the above embodiment, the determination whether to set the FA node, is:

[0020] 判断所述节点是否为混合节点是否存在FA,如果所述节点是混合节点且不存在FA,则需要在所述节点建立FA ;否则,不需要在所述节点建立FA0 [0020] The node determines whether there is hybrid FA node, if the node is a mixing node and there is no FA, the FA is required at the node; otherwise, need not be established at the node FA0

[0021] 上述方案中,所述确定是否需要在所述节点建立FA,进一步包括: [0021] In the above embodiment, the determination whether to set the FA node, further comprising:

[0022] 如果需要在所述节点建立FA,则挂起客户层第一信令消息,并创建FA需要的传送端口;如果不需要在所述节点建立FA,则返回LSP建立失败响应。 [0022] If desired the FA at the node, then the first signaling message pending client layer, and creates a transmission port FA needed; if not the FA at the node, to establish the LSP failure response is returned.

[0023] 本发明还提供了一种LSP的建立系统,所述系统包括:首节点和尾节点;其中, [0023] The present invention also provides a LSP establishment, the system comprising: a head node and tail node; wherein,

[0024] 所述首节点,用于根据管理平面请求和网络拓扑消息计算待建立的LSP所需经过的路径消息,组织携带扩展后的链路标志信息的第一信令消息,并将所述第一信令消息逐跳发送给下游节点,直到LSP的尾节点接收到第一信令消息并配置传送平面交叉成功;其中,所述扩展后的链路标志信息包括链路重路由类型信息以及链路保护恢复结合的类型信息; [0024] The first node is configured to route message and network topology information required LSP to be established through the calculation of the request according to the management plane, the link flag tissue carrying the extended first signaling message information, and the a first signaling message sent to the downstream node hop by hop until the end node of the LSP receiving the first signaling message and configure the transport plane intersecting successfully; wherein the link flag and the extended information includes the link type information and rerouting link protection type of recovery information combined;

[0025] 所述尾节点,用于组织第二信令消息逐跳发送上游节点,直到LSP的首节点接收到第二信令消息并配置传送平面交叉成功。 [0025] The tail node, a second signaling message sent hop by hop upstream node tissue until the first node of the LSP receives the second signaling message and configure the transport plane intersecting success.

[0026] 上述方案中,所述系统还包括: [0026] In the above embodiment, the system further comprising:

[0027]中间节点,用于接收与其相邻的上游节点或下游节点的信令消息,并将所述信令消息发送给与其相邻的下游节点或上游节点;且各中间节点根据所述第二信令信息配置传送平面交叉成功。 [0027] intermediate node for receiving signaling messages adjacent upstream node or downstream nodes and the signaling message to the adjacent downstream node or the upstream node; and each intermediate node based on the first two plane intersecting the signaling information transmitted successfully configured.

[0028] 上述方案中,所述首节点、尾节点、以及中间节点均包括链路判断单元和FA创建判断单元;其中, [0028] In the above embodiment, the head node, tail node and an intermediate node includes a link judging unit and a determining unit creates FA; wherein,

[0029] 所述链路判断单元,用于判断节点是否存在满足条件的链路,如果存在满足条件的链路,则节点在所述链路上申请并预留资源,并组织第一信令消息发送给与其相邻的下游节点; [0029] The link determination unit configured to determine whether a link node satisfying the condition exists, if the link satisfying the condition exists, the application node and to reserve resources on the link, and signaling a first tissue message to the downstream node adjacent thereto;

[0030] 所述FA创建判断单元,用于确定是否需要在节点建立FA0 [0030] The FA creation determination unit for determining whether the node to establish FA0

[0031] 上述方案中,所述FA创建判断单元具体用于:判断节点是否为混合节点且是否存在FA,如果所述节点是混合节点且不存在FA,则确定需要在所述节点建立FA ;否则,确定不需要在所述节点建立FA。 [0031] In the above embodiment, the determination unit is configured to create FA: determining whether the node is a node and the presence or absence of FA mixture, mixing node if the node is and there is no FA, the FA determining the need at the node; otherwise, the FA does not need to determine the node.

[0032] 上述方案中,所述FA创建判断单元还用于:确定需要在所述节点建立FA时,所述节点挂起客户层第一信令消息,并创建FA需要的传送端口;确定不需要在所述节点建立FA,所述节点返回LSP建立失败响应。 [0032] In the above embodiment, the determination unit is further configured to create FA: FA when determining the need for the node, the first node suspend signaling message client layer, and creates a transmission port FA needed; not determined FA need to establish at the node, the node returns a failure response to the establishment of LSP.

[0033] 本发明所提供的LSP的建立方法及系统,在现有链路保护属性的基础上,增加了链路重路由属性,并使链路保护恢复属性更丰富、更灵活,进而能够建立具有链路恢复能力、或链路保护恢复结合能力的LSP ;同时,也丰富了LSP的类型,达到更智能的保护恢复效果O [0033] Method and system for the establishment of LSP provided by the present invention, based on the conventional link protection attributes, increase the rerouting attributes link, link protection and restoration properties richer, more flexible, and thus able to establish has the ability to restore the link, link protection or restoration LSP binding ability; but also enriched the type LSP achieve more intelligent protection recovery effect O

[0034] 本发明还通过增加链路重路由类型的方法,来表示多层网络中服务层的链路恢复类型,将链路重路由类型与链路保护类型结合来表示服务层的链路保护恢复的结合,以实现多层网络下更多类型的保护恢复的方法,也使得客户层业务的建立更加方便,多层业务保护恢复结合方式更多。 [0034] The present invention is further increased by rerouting the link type method, a multi-layer networks to represent the link layer recovery type service, in conjunction with the type of the link reroute link protection type to represent the link layer protection service restoration combined to achieve a multi-layer method under more types of network protection and restoration, but also makes the establishment of client services more convenient, multi-layer protection and restoration business combination way more.

附图说明 BRIEF DESCRIPTION

[0035] 图1为本发明新增的链路重路由类型示意图; [0035] FIG. 1 of the present invention the new type of link rerouting a schematic view;

[0036] 图2为现有标准中的PROTECT1N对象示意图; [0036] FIG 2 is a conventional standard PROTECT1N object diagrams;

[0037] 图3为本发明扩展后的PROTECT1N对象示意图; [0037] FIG 3 the present invention extends PROTECT1N object diagrams;

[0038] 图4为本发明建立具有链路恢复能力、或链路保护恢复结合能力的LSP方法的实现流程示意图; [0038] FIG. 4 is a schematic flow achieved with the establishment of a link method for recovery LSP, or the link protection and restoration capabilities of the present invention in combination;

[0039] 图5本发明实施例需要自动建立FA-LSP的客户层LSP建立过程的实现流程示意图; Example [0039] FIG. 5 of the present invention to be automatically established client layer FA-LSP LSP establishing a schematic process flow implemented;

[0040] 图6本发明实施例不需要自动建立FA-LSP的客户层LSP建立过程的实现流程示意图; [0040] Figure 6 embodiment of the present invention does not need to automatically create embodiment FA-LSP at the client layer LSP established to achieve a schematic process flow;

[0041] 图7是本发明实施例一种LSP建立系统的组成结构示意图; [0041] FIG. 7 embodiment of the present invention is a structural diagram of embodiment of a LSP established system;

[0042] 图8为本发明实施例节点的组成结构示意图。 [0042] Figure 8 a schematic diagram illustrating a configuration example of the embodiment of the present invention node.

具体实施方式 detailed description

[0043] 下面结合附图及具体实施例对本发明再作进一步的详细的说明。 [0043] Specific embodiments of the present disclosure will be described in further detail below in conjunction with the accompanying drawings and.

[0044] 图1为本发明新增的链路重路由类型示意图,如图1所示,新增的链路子类型-长度-值(TLV,Type-Length-Value)类型为链路重路由类型(LinkRerouting Type),占32 比特;包括:重路由头(Rerouting Cap)字段,占8比特;保留(Reserved)字段,占24比特。 [0044] FIG. 1 of the present invention the new type of link rerouting schematic, new link sub-type shown in Figure 1 - Length - Value (TLV, Type-Length-Value) type link rerouting type (LinkRerouting type), accounting for 32 bits; comprising: re-routing header (rerouting Cap) field, representing 8 bits; reserved (reserved) field, representing 24 bits.

[0045] 所述链路重路由类型用来表示链路的重路由能力,也就是用来表示链路的恢复能力,其取值方式包括: [0045] The link used to indicate the type of rerouting rerouting capability of links, which is used to indicate the ability to restore the link, which values ​​include:

[0046] 0x00:No Rerouting,表不无重路由; [0046] 0x00: No Rerouting, not without rerouting table;

[0047] 0x01: (Full)Rerouting,表示(完全)重路由。 [0047] 0x01: (Full) Rerouting, represents (full) rerouting.

[0048] 本发明并不局限于某种特定的扩展方式,只要能将链路重路由类型信息洪泛到全网节点即可。 [0048] The present invention is not limited to a specific extension, as long as the link can re-routing type information can be flooded throughout the network node.

[0049] 图2为现有标准中的PROTECT1N对象示意图,图3为本发明扩展后的PROTECT1N对象示意图,如图3所示,本发明将现有标准中原有6比特的链路标志(Link Flags)扩展为8比特,扩展后的Link Flags取值包括: [0049] FIG. 2 is a schematic PROTECT1N objects in the existing standard, FIG. 3 is a schematic PROTECT1N the extended objects of the present invention, shown in Figure 3, the present invention is the existing standard 6-bit original flag link (Link Flags ) extended to 8 bits, the extended Link Flags value comprises:

[0050] 0x01:Extra Traffic (额外业务); [0050] 0x01: Extra Traffic (additional services);

[0051] OxO2 〖Unprotected (无保护); [0051] OxO2 〖Unprotected (no protection);

[0052] 0x04: Shared (共享保护); [0052] 0x04: Shared (Shared Protection);

[0053] 0x08:Dedicatedl: I (专用1:1 保护); [0053] 0x08: Dedicatedl: I (Dedicated 1: 1 protection);

[0054] 0x10 -Dedicated 1+1 (专用1+1 保护); [0054] 0x10 -Dedicated 1 + 1 (Dedicated 1 + 1 protection);

[0055] 0x20:Enhanced (增强保护); [0055] 0x20: Enhanced (Enhanced Protection);

[0056] 0x40: (Full)Routing((完全)重路由); [0056] 0x40: (Full) Routing ((fully) rerouting);

[0057] 0x80:保留。 [0057] 0x80: Reserved.

[0058] 其中,最后两个取值,即0x40和0x80为新增取值,可以设置不止一个比特位,以表示多种链路保护类型、链路重路由类型、或链路保护和恢复结合的类型。 [0058] wherein, the last two values, i.e., new values ​​for the 0x40 and 0x80, more than one bit may be provided to indicate various types of link protection, rerouting the link type, link protection and restoration or binding type. 但本发明并不局限于某种特定的扩展方式,只要能将LSP需要的扩展后的链路标志信息传递到下游节点即可。 However, the present invention is not limited to a specific extension mode, as long as the transmission link flag can require extended post-LSP information to a downstream node can.

[0059] 图4为本发明建立具有链路恢复能力、或链路保护恢复结合能力的LSP的方法的实现流程示意图,如图4所示,该方法包括以下步骤: [0059] Fig 4 a schematic flowchart having method of establishing a link to achieve recovery, link protection or restoration of the ability to bind to the LSP, the present invention is shown in FIG. 4, the method comprising the steps of:

[0060] 步骤401:LSP的首节点根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息; [0060] Step 401: The first node of the LSP path LSP information and network topology information required to be established through the calculation according to the request management plane;

[0061] 具体的,所述路径信息包括路由信息、层边界信息、链路资源信息等; [0061] Specifically, the path information comprises routing information, boundary information layer, link resource information;

[0062] 步骤402:LSP的首节点根据得到的路径信息组织携带扩展后的链路标志信息的第一信令消息,并将所述第一信令消息逐跳发送给下游节点,直到LSP的尾节点接收到所述第一信令消息并配置传送平面交叉成功;其中,所述扩展后的链路标志信息包括链路重路由类型信息以及链路保护恢复结合的类型信息; [0062] Step 402: LSP link flag in accordance with the first node after the obtained path information organization expanded first signaling message carries information, hop by hop and transmitting the first signaling message to the downstream node until the LSP tail node receiving the first signaling message and configure the transport plane intersecting successfully; wherein the link flag and the extended information includes the link type information and type information of re-routing restoration binding link protection;

[0063] 具体的,所述第一信令消息可以但不限于路径(Path)消息,所述第一信令消息中包含所述LSP希望的链路保护和链路恢复能力消息。 [0063] Specifically, the first signaling message may be, but is not limited to the path (Path) message, a signaling message containing the first desired link protection LSP and link recovery message.

[0064] 由于本发明将现有标准中的PROTECT1N对象的Link Flags进行了扩展,扩展后的Link Flags增加了(完全)重路由和保留两个取值,且新增取值可以设置不止一个比特位,能够表示多种保护类型或保护和恢复的结合;那么,扩展后的Link Flags能将LSP需要的链路重路由类型消息传递到下游节点。 [0064] Since the present invention is the Link Flags PROTECT1N object existing standard is extended, the extended Link Flags increased (full) rerouting and two reserved values, and new values ​​may be set more than one bit bits can be expressed with a variety of types of protection, or protection and restoration; then, link Flags can require the extended LSP re-routing link type message to the downstream node.

[0065] 例如,如果客户层LSP要求的链路保护和恢复类型分别为:无保护和(完全)重路由,即希望客户层无保护恢复能力,服务层仅有恢复能力;那么,以Path信令为例,即:PROTECT1N对象的Link Flags取值为0x42 (无保护且完全重路由),LSP Flags取值为OxOO (无保护)ο [0065] For example, if the link layer protection and restoration LSP types of customer requirements are: unprotected and (full) re-routing, i.e., the client layer unprotected desired resilience, recovery service layer only; then the letter to Path so that, for example, that: Link Flags value PROTECT1N object to 0x42 (unprotected and completely rerouting), LSP Flags value of OxOO (unprotected) ο

[0066] 具体的,所述将第一信令消息逐跳发送给下游节点,进一步包括: [0066] Specifically, the first signaling message hop by hop to a downstream node, further comprising:

[0067] 判断将第一信令消息逐跳发送给下游节点的节点是否存在满足条件的链路,如果存在满足条件的链路,则在该链路上申请并预留链路资源,并将第一信令消息发送给与其相邻的下游节点;否则,确定是否需要在所述节点建立FA0 Node [0067] Analyzing the first signaling message hop by hop to a downstream node if the link satisfying the condition exists, if the condition of a link exists, the application and link resources reserved on that link, and a first signaling message to the adjacent downstream node; otherwise, determining whether to set the node FA0

[0068] 具体的,所述确定是否需要在所述节点建立FA为:判断所述节点是否为混合节点且是否存在FA,如果所述节点是混合节点且不存在FA,则需要在所述节点建立FA ;否则,不需要在所述节点建立FA。 [0068] Specifically, the determination whether the node is in the FA: determining whether the node is a node and the presence or absence of FA mixture, mixing node if the node is and there is no FA, it is necessary at the node the FA; otherwise, the FA does not need at the node.

[0069] 这里,所述混合节点为:同时存在客户层和服务层配置的节点。 [0069] Here, the mixing node: node exists and the client layer service layer configuration simultaneously.

[0070] 具体的,所述确定是否需要在所述节点建立FA,进一步包括: [0070] Specifically, the determination whether to set the FA node, further comprising:

[0071] 如果需要在该节点建立FA,则挂起客户层第一信令消息,并创建FA需要的传送端口;如果不需要在该节点建立FA'返回LSP建立失败响应。 [0071] If desired the FA at the node, then the first signaling message pending client layer, and creates a transmission port FA needed; if not the FA at the node 'LSP fails to return a response.

[0072] 这里,所述如果不需要在该节点建立FA,返回LSP建立失败响应,进一步包括:如果该节点为首节点,则首节点返回第一信令消息失败响应;如果该节点为非首节点,则由该节点构造第三信令消息并逐跳发送给上游节点,直到首节点接收到第三信令消息。 [0072] Here, if the FA need not be established in this node, returns a failure response to the establishment of LSP, further comprising: if the node is a head node, the first node returns a failure response to the first signaling message; if the node is non-head node , by the configuration of the third node hop by hop signaling message and sent to the upstream node till the first node receiving the third signaling message.

[0073] 这里,所述第三信令消息为第一信令消息失败响应,即LSP建立失败响应;所述第三信令消息可以是但不限于路径错误(PathErr)消息。 [0073] Here, the third signaling message as a first signaling message in response to the failure, i.e., in response to the LSP fails; the third signaling message may be but is not limited to a path error (a PathErr) message.

[0074] 具体的,所述挂起客户层第一信令消息,并创建FA需要的传送端口,还包括: [0074] Specifically, the suspend message signaling layer of the first client, and creates a transmission port FA required, further comprising:

[0075] 从客户层第一信令消息中获取服务层LSP的保护恢复信息,在服务层链路上申请并预留资源,并组织服务层第一信令消息逐跳发送给下游节点,直到服务层的尾节点接收到服务层第一信令消息并配置传送平面交叉成功;服务层的尾节点接收到服务层第一信令消息并配置传送平面交叉成功后,在尾节点创建生成FA需要的传送端口同时还需要激活FA,并组织服务层第二信令消息逐跳发送给上游节点,直到服务层的首节点收到第二信令消息并配置传送平面交叉成功,并激活服务层首节点的FA链路的传送端口,取消客户层第一信令消息的挂起,从而可继续客户层第一信令消息的传输。 [0075] obtained from the first signaling message in the client layer protection service layer LSP recovery information, applications and services reserved resources on the link layer, and a first tissue layer service signaling message sent to the downstream node hop by hop until tail node service layer receives a service layer of the first signaling message and configure the transport plane intersecting successful; tail node layer service after receiving the first signaling message service layer and the transport plane intersecting successfully configured, create a need to generate a tail node FA the transfer port is also required to activate the FA, and a second tissue layer service signaling message is sent to the upstream node hop by hop until the ingress node receives the service layer and configured to transmit a second signaling message successfully intersecting plane, and activate the service layer header FA link transmission port of a node, client layer Unsuspending first signaling message, so that the customer can continue the transmission layer of the first signaling message.

[0076] 这里,如果所述节点为FA-LSP的首节点或尾节点,需要创建生成FA需要的传送端口,同时还需要激活FA,并将FA信息洪泛到网络中,以便于客户层LSP的建立。 [0076] Here, if the node is the FA-LSP head node or the end node, create a need to generate a delivery port FA needs, while also activate FA, FA information and flooding the network to the client layer LSP to establishment.

[0077] 步骤403:LSP的尾节点收到第一信令消息并配置传送平面交叉成功后,组织第二信令消息并将第二信令消息逐跳发送给上游节点,且各上游节点根据所述第二信令信息配置传送平面交叉成功,直到LSP的首节点接收到第二信令消息并配置传送平面交叉成功; [0077] Step 403: LSP tail node receives a first signaling message and transmits the plane intersecting the configuration is successful, the second signaling message and the second tissue signaling message is sent to the upstream node hop by hop, and each node according to the upstream transmitting the second signaling information is arranged crossing the plane of success, until the first node of the LSP receives the signaling message and a second transport plane intersecting configuration is successful;

[0078] 其中,所述第二信令消息可以是但不限于预留(Resv)消息。 [0078] wherein the second signaling message may be, but is not limited to reservation (the Resv) message.

[0079] 图5、图6的实施例,均是在本发明新增了链路重路由属性,并对现有标准中PROTECT1N对象的Link Flags进行了扩展的情况下进行的。 [0079] FIG. 5, FIG. 6 embodiment, in the present invention are added rerouting link attributes, and Link Flags in the existing standard PROTECT1N case where the object is extended performed.

[0080] 由于具有链路保护能力的链路,可以通过在该链路上预先配置不同的保护类型来实现,也可以通过建立具有保护能力的LSP并生成FA来实现;前者需要通过手动配置保护组信息,后者可以通过控制平面自动建立和配置具有保护能力的FA-LSP。 [0080] Since the link having a link protection capability, can be preset on the links of different types of protection achieved, may be realized by establishing an LSP having a protection capability and generates the FA; the former need to manually configure the protection group information, which can automatically create and configure FA-LSP having a protection capability through the control plane. 而具有链路恢复能力的链路、或具有链路保护恢复结合能力的链路只能由具有恢复能力的FA-LSP、具有保护恢复结合能力的FA-LSP提供。 A link having link resilience, or have a link to restore the ability to bind the protection link with FA-LSP only by resilience, FA-LSP having binding capacity to provide protection and restoration. 图5给出了需要自动建立FA-LSP的客户层LSP的建立过程,图6给出了不需要自动建立FA-LSP的客户层LSP的建立过程。 Figure 5 shows the setup procedure to be automatically established client layer FA-LSP LSP, and Figure 6 shows the process does not require the establishment of FA-LSP automatically established client layer LSP. [0081 ] 图5为需要自动建立FA-LSP的客户层LSP建立过程的实现流程示意图,本实施例中,客户层LSP要求的链路保护和恢复类型分别为:无保护和(完全)重路由,即希望客户层无保护恢复能力,服务层仅有恢复能力;图5中,节点a为首节点,且为非混合节点;节点 [0081] FIG. 5 is a FA-LSP to be automatically established client layer to achieve a schematic flow diagram of the process of establishment of LSP, the present embodiment, the client layer LSP required link protection and recovery type are: unprotected and (full) rerouting , i.e., the client layer unprotected desired resilience, the ability to recover only the service layer; FIG. 5, a node an ingress node, and a non-hybrid node; node

1、k为混合节点,节点j、j+l、z为非混合节点;其中,节点i和节点k分别为服务层LSP的首节点和尾节点,节点z为客户层LSP的尾节点;且节点a与节点i之间,节点k与节点z之间均已存在客户层链路,节点i与节点k之间不存在客户层链路,需要在节点i和节点k之间创建FA的传送端口;但是节点i与节点j之间、节点j与节点j+Ι之间、节点j+Ι与节点k之间均存在服务层链路;如图5所示,所述LSP建立流程包括以下步骤: 1, k is a hybrid node, node j, j + l, z non-hybrid node; wherein the nodes i and k are services layer LSP tail node and the first node, a client layer node z to the LSP tail node; and between node i and a node, client layer link does not already exist between the client layer link, node i and node k, the FA needs to be created between node i and node k between the transmitting node and the node k z port; however, between node i and node j, between node j and node j + iota, node j + are present service layer link between nodes K and iota; FIG. 5, the flow includes the following LSP establishment step:

[0082] 步骤501:客户层LSP的节点a根据管理平面请求和网络拓扑信息计算该LSP所经过的路径信息; [0082] Step 501: node a client layer LSP management plane in accordance with the request and network topology information of the LSP path information calculating elapsed;

[0083] 这里,所述LSP所经过的路径包含混合节点1、k,非混合节点j、j+l、z。 [0083] Here, the LSP path through a mixed node 1, k, non-hybrid node j, j + l, z.

[0084] 步骤502:由于节点a为非混合节点,且节点a和节点i之间的客户层链路已经存在,在该客户层链路上申请并预留资源,并组织第一信令消息发送给与其相邻的下游节点i ; [0084] Step 502: a non-hybrid node since the node, and the client layer link between node i and a node already exists, and the application to reserve resources on the client layer link, and a first signaling message tissue sent to the adjacent downstream node I;

[0085] 具体的,所述第一信令消息中包含所述LSP希望的链路保护和链路恢复能力消息,以Path信令为例,即! [0085] Specifically, the first signaling message comprising the desired link protection LSP and link recovery message to the Path message as an example, i.e.,! PROTECT1N对象的Link Flags取值为0x42 (无保护且完全重路由),LSP Flags取值为0x00 (无保护)。 Link Flags value PROTECT1N object to 0x42 (unprotected and completely rerouting), LSP Flags value of 0x00 (unprotected).

[0086] 步骤503:节点i收到第一信令消息后,由于节点i为混合节点,且客户层需要的链路不存在,则挂起客户层第一信令消息,请求创建FA需要的传送端口,从客户层第一信令消息中获取服务层LSP的保护恢复信息,在服务层链路上申请并预留资源,并组织服务层第一信令消息发送给与其相邻的下游节点j ; [0086] Step 503: After receiving the first signaling message node i, since the node i to the mixing node, and requires the client layer link does not exist, the customer hangs layer of the first signaling message, a request to create desired FA transfer port downstream node, obtaining protective layer LSP from customer service layer signaling message in a first resume information request and reserve resources on the service layer link, and a first tissue layer service signaling message to the adjacent j;

[0087] 这里,以Path信令为例,因为客户层第一信令消息中的PROTECT1N对象的LinkFlags取值为0x42,说明服务层的保护恢复能力仅为无保护且完全重路由,因此,构造服务层第一信令消息中LSP的保护恢复能力以及链路保护恢复能力,即-PROTECT1N对象的LSPFlags取值为0x01 (完全重路由),LinkFlags取值为0x02 (无保护)。 [0087] Here, the Path message, for example, because the value PROTECT1N object LinkFlags first signaling message in the client layer is 0x42, the service description resilience protection layer and completely unprotected merely rerouting, therefore, configured a first signaling message service layer protection LSP resilience and recovery capabilities link protection, i.e. LSPFlags value -PROTECT1N object to 0x01 (full re-routing), LINKFLAGS value of 0x02 (unprotected).

[0088] 步骤504:节点j收到第一信令消息后,由于节点j为非混合节点,且与节点j+Ι之间的服务层链路已经存在,在该链路上申请并预留资源,并将第一信令消息发送给与其相邻的下游节点j+1 ; [0088] Step 504: After receiving the first signaling message to node j, node j since node a non-hybrid, and the node j + Ι service layer link exists between application and reserved on that link resources, and a first signaling message to the adjacent downstream node j + 1;

[0089]此时,PROTECT1N 对象的Link Flags 取值为0x02 (无保护),LSP Flags 取值0x01 (完全重路由)。 [0089] In this case, Link Flags value PROTECT1N object to 0x02 (unprotected), LSP Flags value 0x01 (complete rerouting).

[0090] 步骤505:节点j+Ι收到第一信令消息后,由于节点j+Ι为非混合节点,且与节点k之间的服务层链路已经存在,在该链路上申请并预留资源,并将第一信令消息发送给与其相邻的下游节点k ; [0090] Step 505: After node j + iota receiving the first signaling message, since the node j + non-iota hybrid node, and the service layer link between the node k exists, the application on that link, and resource reservation, and sends a first signaling message to the adjacent downstream node K;

[0091] 步骤506:节点k收到第一信令消息后,由于节点k为混合节点且为服务层LSP的尾节点,因此,请求创建生成FA需要的传送端口,在服务层链路上申请并预留资源后,配置传送平面交叉成功,并组织第二信令消息发送给与其相邻的上游节点j+Ι,同时激活FA链路的传送端口; [0091] Step 506: After receiving the first signaling message the node k, since k is a mixing node and the node to the end node of the LSP service layer, thus generating a request to create a delivery port of the FA needs to apply at the service layer link after the resources are reserved, the configuration transmission plane intersecting successful, and organize a second signaling message to the adjacent upstream node j + Ι, FA delivery port while activating the link;

[0092] 步骤507:节点j+Ι收到第二信令消息后,由于节点j+Ι为非混合节点,配置传送平面交叉成功,并将第二信令消息发送给其相邻的上游节点j ; [0092] Step 507: After node j + iota receive a second signaling message, since the node j + non-iota hybrid node, configure transport plane intersecting successfully, and sends a second signaling message to its neighboring upstream node j;

[0093] 步骤508:节点j收到第二信令消息后,由于节点j为非混合节点,配置传送平面交叉成功,并将第二信令消息发送给与其相邻的上游节点i ; [0093] Step 508: After receiving the second signaling message to node j, node j since node a non-mixing, cross-arranged transport plane successfully, and sends a second signaling message to the adjacent upstream node I;

[0094] 步骤509:节点i收到第二信令消息后,由于节点i为混合节点且为服务层LSP的首节点,配置传送平面交叉成功,并激活FA链路的传送端口,取消客户层第一信令消息的挂起,继续客户层第一信令消息;节点i在新激活的FA链路的端口上申请并预留客户层资源,并将第一信令消息发送给其相邻的下游节点k,其中所述第一信令消息中包含该LSP希望的链路保护和链路恢复能力,即! [0094] Step 509: After node i receives a second signaling message, since the node i and a node of the first mixed layer LSP of the service nodes, configure transport plane intersecting successful delivery port FA and activate the link, the client layer canceled suspend the first signaling message, a first signaling message continues client layer; node i client application layer and reserves resources on the port the newly activated FA link, and sends a first signaling message to its neighboring downstream node k, wherein the first signaling message that contains the desired link protection LSP and link resilience, i.e.,! PROTECT1N对象的Link Flags取值为0x42 (无保护且完全重路由),LSPFlags取值为0x00 (无保护)。 Link Flags value PROTECT1N object to 0x42 (unprotected and completely re-routing), LSPFlags value of 0x00 (unprotected).

[0095] 步骤510:节点k收到第一信令消息后,因与节点z之间的客户层链路已经存在,在该链路上申请并预留资源,并将第一信令消息发送给与其相邻的下游节点z ; [0095] Step 510: After receiving the first signaling message the node k, the client layer link between the node and the result z already exists, and the application to reserve resources on the link, and sends a first signaling message to the adjacent downstream node z;

[0096] 这里,PROTECT1N对象的Link Flags取值为0x42 (无保护且完全重路由),LSPFlags取值为0x00 (无保护)。 [0096] Here, Link Flags value PROTECT1N object to 0x42 (unprotected and completely rerouting), LSPFlags value of 0x00 (unprotected).

[0097] 步骤511:节点z收到第一信令消息后,由于节点z为非混合节点且为客户层LSP的尾节点,配置传送平面交叉成功,并组织第二信令消息发送给其相邻的上游节点k ; [0097] Step 511: After receiving the first signaling message the node z, z-immiscible since the node and the node to the end node of the LSP client layer disposed transport plane intersecting successful, and a second signaling message to the tissue relative adjacent upstream node K;

[0098] 步骤512:节点k收到第二信令消息后,配置传送平面交叉成功,并将第二信令消息发送给其相邻的上游节点i ; [0098] Step 512: After node k receives the second signaling message, the successful cross-arranged transport plane, and transmit a second signaling message to its adjacent upstream node I;

[0099] 步骤513:节点i收到第二信令消息后,配置传送平面交叉成功,并将第二信令消息发送给其相邻的上游节点a ; [0099] Step 513: After node i receives a second signaling message, the successful cross-arranged transport plane, and transmit a second signaling message to its upstream node adjacent to a;

[0100] 步骤514:节点a收到第二信令消息后,由于节点a为非混合节点且为客户层LSP的首节点,配置传送平面交叉成功,客户层LSP建立成功。 [0100] Step 514: After receiving the second node a signaling message, since the node is a non-hybrid node and the head node of the LSP client layer disposed transport plane intersecting successful, the client layer LSP is established.

[0101] 上述自动建立的FA-LSP所形成的FA的保护能力为0x02无保护,恢复能力为0x01 (完全)重路由。 Protection of FA [0101] The FA-LSP established automatically formed is unprotected 0x02, 0x01 recovery of (full) rerouting.

[0102] 图6为本发明不需要自动建立FA-LSP的客户层LSP建立过程的实现流程示意图,本实施例中,客户层LSP要求的链路保护恢复类型分别为无保护和(完全)重路由,即希望客户层无保护恢复能力,服务层仅有恢复能力;图6中,所述节点a为首节点;节点1、k为混合节点,节点z为非混合节点,且节点z为客户层LSP的尾节点;节点a与节点1、节点i与节点k、节点k与节点z间均已存在客户层链路,不需要在节点i和节点k之间创建FA的传送端口;如图6所示,所述LSP建立流程包括以下步骤: Are unprotected, and (complete) does not need to re-establish automatically FA-LSP at the client layer to achieve a schematic flow diagram of the process of establishing LSP [0102] FIG. 6 of the present invention, in this embodiment, the client layer link protection type of recovery LSP requirements route, i.e., the client layer unprotected desired resilience, recovery service layer only; in FIG. 6, a node of the ingress node; node 1, k is a hybrid node, the node is immiscible node z, and z is a client layer node LSP tail node; node a node 1, between node i and node k, node k to node z have the presence of the client layer link, the need to create the delivery port FA between nodes i and k; FIG. 6 As shown in the LSP setup procedure comprising the steps of:

[0103] 步骤601:客户层LSP的节点a根据管理平面请求和网络拓扑信息计算该LSP所经过的路径信息; [0103] Step 601: the client layer LSP node a route information and network topology information of the LSP passes is calculated according to the request management plane;

[0104] 这里,所述计算出的LSP所经过的路径包含混合节点1、k,以及非混合节点z。 [0104] Here, the calculated LSP path through which comprises 1, k, and a non-hybrid blend node node z.

[0105] 步骤602:由于节点a为非混合节点,且与节点i之间的客户层链路已经存在,在该链路上申请并预留资源,并组织第一信令消息发送给与其相邻的下游节点i ; [0105] Step 602: a non-hybrid node since the node and the client layer link between the node i exists, the application on that link resources are reserved, and a first signaling message to the tissue thereto I adjacent to the downstream node;

[0106] 具体的,所述第一信令消息中包含所述LSP希望的链路保护和链路恢复能力。 [0106] Specifically, the first signaling message comprising the desired link protection LSP and link resilience.

[0107] 具体的,以Path信令为例,PROTECT1N对象的Link Flags取值为0x42 (无保护且完全重路由),LSP Flags取值为0x00 (无保护)。 [0107] Specifically, in an example Path signaling, Link Flags value PROTECT1N object to 0x42 (unprotected and completely rerouting), LSP Flags value of 0x00 (unprotected).

[0108] 步骤603:节点i收到第一信令消息后,因为与节点k之间的客户层链路已经存在,所以将第一信令消息发送给与其相邻的下游节点k ; [0108] Step 603: After node i receives a first signaling message, since the client layer link between the node k and already exists, it sends a first signaling message to the adjacent downstream node k;

[0109] 步骤604:节点k收到第一信令消息后,因为与节点z之间的客户层链路已经存在,所以将第一信令消息发送给与其相邻的下游节点Z ; [0109] Step 604: After receiving the first signaling message the node k, since the client layer link between z and the node already exists, it sends a first signaling message to a downstream node adjacent to the Z;

[0110] 步骤605:节点z收到第一信令消息后,由于节点z为非混合节点且为LSP的尾节点,配置传送平面交叉成功,并组织第二信令消息发送给与其相邻的上游节点k ; [0110] Step 605: After receiving the first signaling message the node z, z-immiscible since the node and the node is the end node of the LSP, configured transport plane intersecting successful, and a second signaling message to the tissue adjacent thereto upstream node K;

[0111] 步骤606:节点k收到第二信令消息后,配置传送平面交叉成功,并将第二信令消息发送给与其相邻的上游节点i。 [0111] Step 606: After node k receives the second signaling message, the successful cross-arranged transport plane, and transmit a second signaling message to the adjacent upstream node i.

[0112] 步骤607:节点i收到第二信令消息后,配置传送平面交叉成功,并将第二信令消息发送给与其相邻的上游节点a ; [0112] Step 607: After node i receives a second signaling message, the successful cross-arranged transport plane, and transmit a second signaling message to the upstream node adjacent to a;

[0113] 步骤608:节点a收到第二信令消息后,由于节点a为非混合节点且为LSP的首节点,配置传送平面交叉成功,客户层LSP建立成功。 [0113] Step 608: After receiving the second node a signaling message, since the node is a non-hybrid node and the head node of the LSP, transport plane intersecting the configuration is successful, the client layer LSP is established.

[0114] 本实例中,虽然节点i和节点k均为混合节点,但是,由于FA已经存在,所以不需要建立FA需要的传送端口,客户层可以直接将第一信令消息逐跳发送给下游节点,直到尾节点接收到第一信令消息,配置传送平面交叉成功,并由尾节点组织第二信令消息,逐跳发送给上游节点,直到首节点接收到第二信令消息,配置传送平面交叉成功,如此,客户层LSP建立完成。 [0114] In the present example, although the nodes i and k are mixed nodes, however, since the FA already exists, it is not necessary to establish the transfer port, the client layer may need FA directly sending first signaling message hop by hop to downstream node until the end node receives the first signaling message, the successful cross-arranged transport plane, tail node tissue by the second signaling message, sent to the upstream node hop by hop until the first node receives the second signaling message, transmitting configuration level crossing success, so, the client layer LSP established.

[0115] 显然,在客户层建立LSP所要用到的链路的保护恢复能力满足要求的情况下,如果客户层LSP要求的链路保护恢复类型分别为专用1+1保护和(完全)重路由,即希望客户层无保护恢复能力,服务层具有保护恢复结合能力(既有保护又有恢复能力);那么,不管是否需要自动建立FA-LSP,都只需要将客户层第一信令中的链路保护恢复能力表示成保护恢复结合即可,以Path信令为例,此时PROTECT1N对象的Link Flags取值为0x50 (专用保护且(完全)重路由),LSP Flags取值为0x00 (无保护)。 Under the protection resilience to meet the requirements [0115] Clearly, the use to set up an LSP in the client layer link, if the requirements of the client layer link protection LSP recovery type are dedicated 1 + 1 protection and the (full) rerouting that customers want the ability to recover unprotected layer, the service layer protection and restoration have binding capacity (both protection have resilience); so, whether the need to establish an automatic FA-LSP, the client need only the first layer signaling represents resilience link protection to protect the binding can be restored to the Path message as an example, this time value PROTECT1N link Flags object to 0x50 (specific protected and (full) rerouting), LSP Flags value of 0x00 (None protection).

[0116] 如果客户层LSP要求的链路保护恢复类型分别为无保护和(完全)重路由,同时要求客户层的保护恢复能力为1+1双向保护,即希望客户层有保护能力,服务层有恢复能力(客户层保护和服务层恢复结合);那么,不管是否需要自动建立FA-LSP,都只需要将客户层第一信令中的链路保护恢复能力表示成保护恢复结合即可,以Path信令为例,此时PROTECT1N对象的Link Flags 取值为0x40 ((完全)重路由),LSP Flags 取值为0x10 (1+1双向保护)。 [0116] If the client layer link protection type of recovery LSP requirements are unprotected and (full) re-routing, while claimed capability of the client layer is restored to 1 + 1 bidirectional protection, i.e., the client layer protection desired, the service layer there resilience (client layer protection and recovery services layer in combination); so, whether the need to establish an automatic FA-LSP, you need to link only to protect customers the ability to recover the first layer signaling indicates to the protection and restoration can be combined, Path message to an example, this time value PROTECT1N Link Flags object to 0x40 ((totally) re-routing), LSP Flags value of 0x10 (1 + 1 bidirectional protection).

[0117] 本发明通过扩展后的PROTECT1N对象,可以对客户层和服务层的保护恢复进行灵活搭配以满足各种业务场景,丰富了保护恢复类型。 [0117] The present invention PROTECT1N target after extensions, customers can protective layer and service layer with a flexible recovery to meet various business scenarios, enriching the protection and restoration type.

[0118] 图7为本发明实施例一种LSP建立系统的组成结构示意图,如图7所示,该系统包括首节点71和尾节点73,其中: [0118] FIG. 7 embodiment of a system structural diagram of a LSP established, as shown in FIG. 7 of the present invention, the system comprises a first node 71 and the tail node 73, wherein:

[0119] 所述首节点71,用于根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息,组织携带扩展后的链路标志信息的第一信令消息,并将所述第一信令消息逐跳发送给下游节点,直到LSP的尾节点73接收到第一信令消息并配置传送平面交叉成功;其中,所述扩展后的链路标志信息包括链路重路由类型信息以及链路保护恢复结合的类型信息; [0119] The first node 71, network topology information and for computing LSP to be established through the desired path information, organize a first signaling message with the link flag in accordance with the management plane extension information request, and the said first signaling message sent to the downstream node hop by hop until the LSP tail node 73 receives the first signaling message and configure the transport plane intersecting successfully; wherein the link flag and the extended information includes the link type rerouting and a link protection and restoration information type information in combination;

[0120] 其中,所述第一信令消息中包含所述LSP希望的链路保护和链路恢复能力信息。 [0120] wherein the signaling message comprises a first LSP link protection desired resilience and link information.

[0121] 所述尾节点73,用于组织第二信令消息并将第二信令消息逐跳发送给上游节点,直到LSP的首节点71接收到第二信令消息并配置传送平面交叉成功。 [0121] The tail node 73, and the second signaling message for organizing the second signaling message is sent to the upstream node hop by hop until the first node of the LSP 71 receives the second signaling message and configure the transport plane intersecting successful .

[0122] 进一步的,所述系统还包括: [0122] Further, the system further comprising:

[0123]中间节点72,用于接收与其相邻的上游节点或下游节点的信令消息,并将所述信令消息发送给与其相邻的下游节点或上游节点;且各中间节点根据接收到的所述第二信令信息配置传送平面交叉成功。 [0123] intermediate node 72, for receiving a signaling message adjacent upstream node or downstream nodes and the signaling message to the adjacent downstream node or the upstream node; and each intermediate node according to the received It said second signaling information transport plane intersecting the configuration success.

[0124] 无论首节点、尾节点,还是中间节点,均可以采用图8所示的节点组成结构,如图8所示,所述节点包括链路判断单元81和FA创建判断单元82 ;其中, [0124] Whether the head node, tail node or an intermediate node, the composition can be employed in the structure of the node shown in FIG. 8, FIG. 8, the node comprising link judging unit 81 and the judging unit 82 creates FA; wherein,

[0125] 所述链路判断单元81,用于判断节点是否存在满足条件的链路,如果存在满足条件的链路,则节点在该链路上申请并预留资源,并将第一信令消息发送给与其相邻的下游节点; [0125] The link determination unit 81, the link for determining whether the node satisfying the condition exists, if the link satisfying the condition exists, the application node and to reserve resources on the link and the first signaling message to the downstream node adjacent thereto;

[0126] 所述FA创建判断单元82,用于确定是否需要在节点建立FA。 [0126] The FA creation determination unit 82 for determining whether to set the FA node.

[0127] 具体的,所述FA创建判断单元82具体用于: [0127] Specifically, the FA determining unit 82 is specifically configured to create:

[0128] 判断节点是否为混合节点且是否不存在FA,如果所述节点是混合节点且不存在FA,则需要在所述节点建立FA ;否则,不需要在所述节点建立FA0 [0128] determines whether the node and whether the node is a mixed FA does not exist, if the node is a mixing node and there is no FA, the FA is required at the node; otherwise, need not be established at the node FA0

[0129] 具体的,如果FA创建判断单元82确定需要在该节点建立FA,则所述节点挂起客户层第一信令消息,并创建FA需要的传送端口; [0129] Specifically, if the FA determining unit 82 determines that creating the FA at the node, the node is suspended first signaling message client layer, and creates a transmission port FA needs;

[0130] 如果FA创建判断单元82确定不需要在该节点建立FA,则所述节点返回LSP建立失败响应。 [0130] If the FA does not need to create the determination unit 82 determines the FA in the node, the node returns the response to the LSP fails.

[0131] 以上所述,仅为本发明的较佳实施例而已,并非用于限定本发明的保护范围。 [0131] The above are only preferred embodiments of the present invention but are not intended to limit the scope of the present invention.

Claims (10)

  1. 1.一种标签交换路径LSP的建立方法,其特征在于,所述方法包括: LSP的首节点根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息; LSP的首节点根据得到的路径信息组织携带扩展后的链路标志信息的第一信令消息,并将所述第一信令消息逐跳发送给下游节点,直到LSP的尾节点接收到所述第一信令消息并配置传送平面交叉成功;其中,所述扩展后的链路标志信息包括链路重路由类型信息以及链路保护恢复结合的类型信息; LSP的尾节点收到第一信令消息并配置传送平面交叉成功后,组织第二信令消息并将第二信令消息逐跳发送给上游节点,且各上游节点根据所述第二信令信息配置传送平面交叉成功,直到LSP的首节点接收到第二信令消息并配置传送平面交叉成功; 其中,所述第一信令消息中包含所述LSP希望的链路保护和链路恢复能力消 1. A method for establishing a label switched path LSP, characterized in that, said method comprising: a first node of the LSP and topology information required for computing LSP to be established route information through the management plane in accordance with the request; the first node according to the LSP link flags tissue path information is carried in the extended information obtained first signaling message and the signaling message is first sent to the downstream node hop by hop until the end node of the LSP receiving the first signaling message and configure the transport plane intersecting successfully; wherein the link flag and the extended information includes the link type information and type information of re-routing restoration binding link protection; end node of the LSP receiving the first signaling message and set the transport plane after the successful cross, the second signaling message and the second tissue signaling message is sent to the upstream node hop by hop, and each plane intersecting an upstream node configured to communicate according to the second signaling information is successful, the first node of the LSP until receipt of the first two signaling message and configure the transport plane intersecting successfully; wherein the first signaling message comprising the link protection LSP desired elimination and link resilience .
  2. 2.根据权利要求1所述的方法,其特征在于,所述LSP的首节点根据管理平面请求和网络拓扑信息计算待建立的LSP所需经过的路径信息之前,该方法还包括: 通过开放式最短路径优先洪泛机制将链路保护类型信息、链路重路由类型信息洪泛到全网节点。 The method according to claim 1, characterized in that, before the first node of the route information required for LSP of the LSP management plane according to network topology information and requests to be established through calculation, the method further comprising: open shortest path First flooding mechanism flooding the link protection type information, link type information to reroute the entire network node.
  3. 3.根据权利要求1所述的方法,其特征在于,所述将第一信令消息逐跳发送给下游节点之前,该方法还包括: 判断将第一信令消息逐跳发送给下游节点的节点是否存在满足条件的链路,如果存在满足条件的链路,则在所述链路上申请并预留资源,并将第一信令消息发送给与其相邻的下游节点;否则,确定是否需要在所述节点建立转发邻接FA0 3. The method according to claim 1, wherein said first signaling message hop by hop downstream node prior to transmitting, the method further comprising: determining a first sending a signaling message hop by hop to downstream nodes whether the link node satisfying the condition exists, if the condition of the presence of the link, and the application to reserve resources on the link and a first signaling message to the adjacent downstream node; otherwise, it is determined whether We need to establish at the node forwarding adjacency FA0
  4. 4.根据权利要求3所述的方法,其特征在于,所述确定是否需要在所述节点建立FA,为: 判断所述节点是否为混合节点是否存在FA,如果所述节点是混合节点且不存在FA,则需要在所述节点建立FA ;否则,不需要在所述节点建立FA0 4. The method according to claim 3, wherein said determining whether the FA at the node, is: judging whether the node is a node exists FA mixture, mixing node if the node is not exists FA, the FA is required at the node; otherwise, need not be established at the node FA0
  5. 5.根据权利要求4所述的方法,其特征在于,所述确定是否需要在所述节点建立FA,进一步包括: 如果需要在所述节点建立FA,则挂起客户层第一信令消息,并创建FA需要的传送端口;如果不需要在所述节点建立FA,则返回LSP建立失败响应。 The method according to claim 4, wherein the determining whether to set the FA node, further comprising: if the FA at the node needed, the customer hangs layer of the first signaling message, and creates a transmission port FA needed; if not the FA at the node, LSP establishment failure response is returned.
  6. 6.一种LSP的建立系统,其特征在于,所述系统包括:首节点和尾节点;其中, 所述首节点,用于根据管理平面请求和网络拓扑消息计算待建立的LSP所需经过的路径消息,组织携带扩展后的链路标志信息的第一信令消息,并将所述第一信令消息逐跳发送给下游节点,直到LSP的尾节点接收到第一信令消息并配置传送平面交叉成功;其中,所述扩展后的链路标志信息包括链路重路由类型信息以及链路保护恢复结合的类型信息;所述尾节点,用于组织第二信令消息逐跳发送上游节点,直到LSP的首节点接收到第二信令消息并配置传送平面交叉成功; 其中,所述第一信令消息中包含所述LSP希望的链路保护和链路恢复能力消息。 A system for establishing an LSP, wherein, said system comprising: a head node and tail node; wherein the first node, a request for a management plane in accordance with the network topology and the desired message LSP to be established through the calculation of path message, the link flag tissue carries the extended first signaling message information, and transmits the first hop by signaling message to the downstream node until the end node of the LSP receiving the first signaling message and transmit the configuration plane crossing successfully; wherein the link flag and the extended information includes the link type information and type information of re-routing restoration bonded link protection; the tail node, for organizing the second signaling message sent by hop upstream node until the first node of the LSP receives the second signaling message and configure the transport plane intersecting successfully; wherein the first signaling message comprising the desired link protection LSP and link recovery message.
  7. 7.根据权利要求6所述的系统,其特征在于,所述系统还包括: 中间节点,用于接收与其相邻的上游节点或下游节点的信令消息,并将所述信令消息发送给与其相邻的下游节点或上游节点;且各中间节点根据所述第二信令信息配置传送平面交叉成功。 7. The system according to claim 6, characterized in that the system further comprises: an intermediate node for receiving signaling messages adjacent upstream node or downstream nodes and the signaling message to adjacent downstream node or the upstream node; and each intermediate node configured to communicate according to said second plane intersecting the successful signaling information.
  8. 8.根据权利要求6或7所述的系统,其特征在于,所述首节点、尾节点、以及中间节点均包括链路判断单元和FA创建判断单元;其中, 所述链路判断单元,用于判断节点是否存在满足条件的链路,如果存在满足条件的链路,则节点在所述链路上申请并预留资源,并组织第一信令消息发送给与其相邻的下游节占.V , 所述FA创建判断单元,用于确定是否需要在节点建立FA0 The system according to claim 6 or claim 7, characterized in that the head node, tail node and an intermediate node includes a link judging unit and a determining unit creates FA; wherein the link determination unit, with determining whether there is a node at a link satisfying the condition, if the condition of the link exists, the application node and to reserve resources on the link, and the organization of a first signaling message to its adjacent downstream section account. V, creating the FA determining unit, for determining whether to set up a node FA0
  9. 9.根据权利要求8所述的系统,其特征在于,所述FA创建判断单元具体用于:判断节点是否为混合节点且是否存在FA,如果所述节点是混合节点且不存在FA,则确定需要在所述节点建立FA ;否则,确定不需要在所述节点建立FA0 9. The system of claim 8, wherein the determination unit is configured to create FA: determining whether the FA node and whether there is a mixing node, if the node is a mixing node and there is no FA, is determined FA need to establish at the node; otherwise, it is determined at the node without establishing FA0
  10. 10.根据权利要求9所述的系统,其特征在于,所述FA创建判断单元还用于:确定需要在所述节点建立FA时,所述节点挂起客户层第一信令消息,并创建FA需要的传送端口;确定不需要在所述节点建立FA,所述节点返回LSP建立失败响应。 10. The system according to claim 9, wherein said determination unit is further configured to create FA: FA when determining the need for the node, the first node suspend signaling message client layer, and create a FA needs transfer port; the FA does not need to determine the node, the node returns a failure response to the establishment of LSP.
CN 201310007761 2013-01-09 2013-01-09 A method and system for establishing a label switched path CN103067275B (en)

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