CN101945049B - Establish multi-protocol label switching systems, node devices and two-way tunnel - Google Patents

Establish multi-protocol label switching systems, node devices and two-way tunnel Download PDF

Info

Publication number
CN101945049B
CN101945049B CN 201010290498 CN201010290498A CN101945049B CN 101945049 B CN101945049 B CN 101945049B CN 201010290498 CN201010290498 CN 201010290498 CN 201010290498 A CN201010290498 A CN 201010290498A CN 101945049 B CN101945049 B CN 101945049B
Authority
CN
Grant status
Grant
Patent type
Application number
CN 201010290498
Other languages
Chinese (zh)
Other versions
CN101945049A (en )
Inventor
杨帆
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
Grant date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/70Admission control or resource allocation
    • H04L47/72Reservation actions
    • H04L47/724Reservation actions involving intermediate nodes, e.g. RSVP
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/28Route fault recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/50Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/70Admission control or resource allocation
    • H04L47/82Miscellaneous aspects
    • H04L47/825Involving tunnels, e.g. MPLS

Abstract

本发明公开了一种多协议标签交换系统、节点设备及双向隧道的建立方法,属于数据网络通讯领域。 The present invention discloses a multi-protocol label switching system, a node device and a method for establishing a bidirectional tunnel, belonging to the field of data communications networks. 本发明方法包括:建立正向LSP的过程中,首节点设备通过各下游节点设备向尾节点设备发送路径消息,其中,除所述尾节点设备以外的各下游节点设备在向其相邻下游节点设备发送的路径消息中携带RRO信息,所述尾节点设备接收到所述路径消息,建立所述正向LSP;所述尾节点设备按照所接收到的路径消息中的RRO信息,通过各上游节点设备向所述首节点设备发送RESV消息,所述首节点设备接收到所述RESV消息,建立与所述正向LSP路径完全一致的反向LSP。 The method of the present invention comprises: a forward LSP establishing process, the first node transmits a path message to the node device apparatus through the downstream end of node devices, wherein each of the downstream node device other than the device at the tail node to its neighboring downstream node path message sent by the information carried in RRO, the tail node apparatus receives the path message, the LSP establishing the forward direction; RRO tail node information of the path to the message device in accordance with received by each upstream node the device sends a RESV message to the first node apparatus, the first node device receiving the RESV message, consistent with the established LSP path forward reverse LSP. 采用本发明技术方案,可以基于现有的对象即可部署双向LSP的段保护。 With the technical scheme of the present invention, can be deployed to protect the segment bidirectional LSP based on an existing object.

Description

多协议标签交换系统、节点设备及双向隧道的建立方法 Establish multi-protocol label switching systems, node devices and two-way tunnel

技术领域 FIELD

[0001] 本发明涉及数据网络通讯领域,尤其涉及一种多协议标签交换系统、节点设备及双向隧道的建立方法。 [0001] The present invention relates to data communications networks, and more particularly relates to a method for establishing a multi-protocol label switching system, a node device and a bidirectional tunnel.

背景技术 Background technique

[0002]在数据通信的 IP (Internet Protocol,网际协议)/MPLS (Multiprotocal LabelSwith,多协议标签交换)网络中,两个LSR(Label Switch Router,标签交换路由器)之间即可以基于RFC3209中描述的方案建立单向LSP (Label Switch Path,标签交换路径),也可以基于RFC3473中描述的方案,通过携带Upstream_Label (上游标签)对象的方式建立双向LSP。 [0002] In the IP (Internet Protocol, Internet Protocol) / MPLS data communication (Multiprotocal LabelSwith, Multi Protocol Label Switching) network that may be based is described in RFC3209 between two LSR (Label Switch Router, label switching router) program to establish the unidirectional LSP (label Switch path, LSP), may also be based scheme described in RFC3473 to establish bidirectional LSP by carrying Upstream_Label (upstream label) objects. 如果LSP的链路、节点发生故障,将会导致通信链路中断,客户数据丢失,不能满足客户对数据可靠传输的需求。 If the LSP link, a node fails, it will lead to a communication link interruption, loss of customer data, can not meet customer demand for reliable data transmission.

[0003] 为了保证数据流在LSP中的可靠传输,现有的保护技术可以分为端到端的保护和段保护。 [0003] In order to ensure reliable transmission of the data stream in the LSP, the prior art can be divided into the protective end sections protection and protection. 端到端的保护方式因为是全程保护,所以在检测到LSP发生故障后,数据流切换速度较慢;因而在对保护倒换时间要求比较苛刻的情况下(比如满足50ms的保护倒换要求),段保护得到广泛的应用。 End of protection because it is full protection, the LSP after detecting the failure, switching the data stream slower; thus the time required for protection switching under more demanding circumstances (such as to meet the protection switching of claim 50ms), segment protection wide range of applications.

[0004] 基于RFC4090总描述的FRR (fast reroute,快速重路由)可以满足单向LSP的段保护需求,但是对双向LSP的FRR无法满足。 [0004] Based on FRR (fast reroute, FRR) to meet the needs of unidirectional protection LSP segment described in RFC4090 total, but the two-way LSP FRR can not be met. RFC4873中通过在信令消息中携带Associat1n (关联)对象、Protect1n (保护)对象和Secondary Explicit Route (次显式路由对象)的方式,可以满足双向LSP的段保护需求。 RFC4873 by Associat1n carried in the signaling message (related) objects, Protect1n (protected) objects and Secondary Explicit Route (Ci Explicit Route Object) is the way to meet the needs of bidirectional LSP protection section. 然而,现在的IP/MPLS设备上并不支持这些对象,因此需要一种更简洁的方式去部署双向LSP的FRR。 Now, however, the IP / MPLS does not support these objects on the device, so the need for a more concise way to the deployment of two-way LSP FRR.

发明内容 SUMMARY

[0005] 为了使网络在出现故障时,能够快速地对双向隧道进行保护-减少数据的丢失,本发明提供了多协议标签交换系统、节点设备及双向隧道的建立方法。 [0005] For the network when a failure occurs, it is possible to rapidly protect the bidirectional tunnel - reduce the loss of data, the present invention provides a multi-protocol label switching system, a node device and a method for establishing the bidirectional tunnel.

[0006] 为了解决上述问题,本发明公开了一种双向隧道的建立方法,包括: [0006] In order to solve the above problems, the present invention discloses a method for establishing a bidirectional tunnel, comprising:

[0007] 建立正向标签交换路径(LSP)的过程中,首节点设备通过各下游节点设备向尾节点设备发送路径消息,其中,除所述尾节点设备以外的各下游节点设备在向其相邻下游节点设备发送的路径消息中携带记录路由对象(RRO)信息,所述尾节点设备接收到所述路径消息,建立所述正向LSP; [0007] The process of establishing the label switched path to forward (LSP), the first node device via the respective downstream node device transmits a path message to the end node apparatus, wherein, in addition to the tail node device to which the respective downstream node device with o path message sent by a downstream node device carries the recording route object (the RRO) information, the tail node apparatus receives the path message, the LSP establishing the forward direction;

[0008] 所述尾节点设备按照所接收到的路径消息中的RRO信息,通过各上游节点设备向所述首节点设备发送资源预留(RESV)消息,所述首节点设备接收到所述RESV消息,建立与所述正向LSP路径完全一致的反向LSP。 [0008] The device according RRO tail node information of the received Path message by the upstream node of each device to the first resource node device transmits reservation (RESV) message, the first node device receiving the RESV message, consistent with the established LSP path forward reverse LSP.

[0009] 进一步,上述方法还包括:建立所述正向LSP的过程中,包括尾节点设备的各下游节点设备接收到路径消息时,还记录发送该路径消息的节点设备的出接口地址; [0009] Further, the above method further comprising: establishing an interface to forward the address of the node device of the LSP, when the downstream node device including the tail node device receives the path message, the path also records the message transmission;

[0010] 在建立所述反向LSP的过程中,各上游节点设备通过其所记录的节点设备的出接口地址发送所述RESV消息。 [0010] In the process of establishing the reverse LSP, the upstream node of each device sends the RESV message by the node address of the interface device to which it is recorded.

[0011] 其中,当所述尾节点设备接收到所述正向LSP的资源预留错误(Resv Err)消息时,才按照所接收到的路径消息中的RRO信息,通过各上游节点设备向所述首节点设备发送RESV消息。 RRO path information message [0011] wherein, when the tail node device receives the forward LSP resource reservation error (Resv Err) message only in accordance with the received by the respective device to the upstream node said first node device sending the RESV message.

[0012] 当网络发生故障时,上述正向LSP和反向LSP分别进行路径切换。 [0012] When the network fails, the above-described forward and reverse LSP path switching LSP respectively.

[0013] 所述各上游节点设备接收到所述RESV消息时,分配标签,预留资源,以建立所述反向LSP。 When [0013] the upstream node of each device receives the RESV message, assign labels, reserving resources, to establish the reverse LSP.

[0014] 本发明还公开了一种多协议标签交换系统,包括: [0014] The present invention also discloses a multi-protocol label switching system, comprising:

[0015] 首节点设备,用于在建立正向标签交换路径(LSP)的过程中,向其相邻下游节点设备发送携带记录路由对象(RRO)信息的路径消息,以及接收相邻上游节点设备发送的资源预留(RESV)消息,并建立与所述正向LSP路径完全一致的反向LSP ; [0015] First node device, the process for establishing the label switched path to forward (LSP), the transmission apparatus carries its neighboring downstream node record route object (the RRO) Path message information, and the receiving apparatus adjacent to the upstream node resource reservation transmission (the RESV) message, and fully consistent with the established LSP path forward reverse LSP;

[0016] 下游节点设备,用于向其相邻下游节点设备发送携带记录路由对象(RRO)信息的路径消息; [0016] downstream node means for transmitting record route object carrying (the RRO) route information message to its neighboring downstream node apparatus;

[0017] 上游节点设备,用于向其相邻上游节点设备发送资源预留(RESV)消息; [0017] The upstream node device, the node device transmits to its upstream neighboring resource reservation (the RESV) message;

[0018] 尾节点设备,用于接收相邻下游节点设备发送的携带RRO信息的路径消息,建立所述正向LSP,以及按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 [0018] End node device for receiving an adjacent downstream node device transmits the Path message carries information RRO, RRO establishing the LSP information of the forward, and the path in accordance with the message received in, to an adjacent upstream node device send RESV message.

[0019] 进一步地,上述系统中,所述下游节点设备,在接收到路径消息时,还用于记录发送该路径消息的节点设备的出接口地址; [0019] Further, the above system, the downstream node apparatus, upon receiving the path message, the node address of the outgoing interface for further recording device sends the path message;

[0020] 所述上游节点设备,在建立所述反向LSP的过程中,还用于通过其所记录的节点设备的出接口地址发送所述RESV消息。 [0020] The upstream node devices, in the process of establishing the LSP in reverse further for transmitting the RESV message by the node address of the interface device to which it is recorded.

[0021] 所述尾节点设备,在接收到所述正向LSP的资源预留错误(Resv Err)消息时,才按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 When [0021] the tail node device, receives the forward resource reservation LSP error (Resv Err) message, before RRO information according to the received path message, the device sent to the upstream node adjacent RESV news.

[0022] 本发明还公开了一种节点设备,包括: [0022] The present invention also discloses a node device, comprising:

[0023] 判断模块、用于判断本节点设备为首节点设备、尾节点设备、下游节点设备或者上游节点设备; [0023] determination means for determining the present node device as the ingress node device, the tail node device, the node device downstream or an upstream node apparatus;

[0024] 处理模块、当所述判断模块判断本节点设备为首节点设备时,向其相邻下游节点设备发送携带记录路由对象(RRO)信息的路径消息,以建立正向标签交换路径(LSP),以及根据所接收的RESV消息,建立与所述正向LSP路径完全一致的反向LSP ; [0024] Processing module, the judging module determines when the present node device as an ingress node device can transmit a record route object (the RRO) route information message to its neighboring downstream node apparatus to establish the forward label switched path (LSP) and according to the received RESV message, and establishing the LSP is completely identical forward reverse LSP;

[0025] 当所述判断模块判断本节点设备为下游节点设备时,则在接收到路径消息后,向其相邻下游节点设备发送携带RRO信息的路径消息; After [0025] When the determination means determines the present node device is a node of a downstream device, upon receiving the path message, transmits a path message carries information RRO its neighboring downstream node apparatus;

[0026] 当判断模块判断本节点设备为上游节点设备时,则在接收到RESV消息后,向其相邻上游节点设备发送RESV消息; [0026] When the determining module determines the current node is an upstream node equipment device, receiving the RESV message, sending RESV message upstream to its neighboring node device;

[0027] 当判断模块判断本节点设备为尾节点设备时,根据所接收的携带RRO信息的路径消息,建立所述正向LSP,以及按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 [0027] When the determining module determines the end of the present node device is a node device according to the Path message carries the information of the received RRO, RRO establishing the LSP information, and the path in accordance with the message received in the forward direction, the adjacent upstream node device sends the RESV message.

[0028] 其中,上述设备中,当所述判断模块判断本节点设备为所述下游节点设备时,所述处理模块还用于记录发送该路径消息的节点设备的出接口地址; [0028] wherein the above-described apparatus, when the determination means determines the node device of the present apparatus to the downstream node, the processing module is further configured to transmit an interface address of the Path message recording node device;

[0029] 当所述判断模块判断本节点设备为所述上游节点设备时,所述处理模块用于通过其所记录的节点设备的出接口地址发送所述RESV消息。 [0029] When the determination means determines said present node device to the upstream node device, the processing means for transmitting the RESV message by the node address of the interface device records it.

[0030]当所述判断模块判断本节点设备为所述尾节点设备时,所述处理模块,在接收到所述正向LSP的资源预留错误(Resv Err)消息时,才按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 [0030] When the determination means determines said present node device is a tail node device, the processing module, when the reservation error (Resv Err) receiving the message at the forward LSP resource, only in accordance with the received RRO information in the path message, the RESV message sent to an adjacent upstream node device.

[0031] 采用本发明技术方案,可以基于现有的对象即可部署双向LSP的段保护。 [0031] The technical solution of the present invention, can be deployed to protect the segment of the bidirectional LSP based on an existing object.

附图说明 BRIEF DESCRIPTION

[0032] 附图用来提供对本发明的进一步理解,并且构成说明书的一部分,与本发明的实施例一起用于解释本发明,并不构成对本发明的限制。 [0032] The accompanying drawings provide a further understanding of the present invention, and constitute part of this specification, the embodiments of the invention, serve to explain the invention, not to limit the present invention. 在附图中: In the drawings:

[0033] 图1为本实施例中建立的双向隧道FRR的示意图; [0033] FIG. 1 is a schematic embodiment of a bidirectional tunnel FRR established in the present embodiment;

[0034] 图2为本实施例中建立双向隧道的流程图。 [0034] FIG 2 is a flowchart of establishing the bidirectional tunnel embodiment of the present embodiment.

具体实施方式 detailed description

[0035] 以下将结合附图及实施例来详细说明本发明的实施方式,借此对本发明如何应用技术手段来解决技术问题,并达成技术效果的实现过程能充分理解并据以实施。 [0035] The accompanying drawings and the following embodiments will be described in detail embodiments of the present invention, thereby fully understand how the present invention is applied to the technical means to solve the technical problem, and achieve the technical effect of implementation and accordingly embodiment.

[0036] 实施例一 [0036] Example a

[0037] 在本发明的实施例中,节点设备之间传递的路径状态请求以RSVP (ResourceReservat1n Protocol,资源预留协议)消息中的Path消息实现,并通过RSVP消息中的PathErr (资源预留错误)消息以反馈处理路径状态请求是否出现错误;节点设备之间传递的预留状态请求通过RSVP消息中的Resv消息实现,并通过RSVP消息中的ResvErr消息以反馈处理预留状态请求是否出现错误。 [0037] In an embodiment of the present invention, the transfer path between the node device status request message Path RSVP (ResourceReservat1n Protocol, Resource Reservation Protocol) messages to achieve, and set aside by an error message in a PathErr RSVP (Resource ) feedback message status request processing path for errors; reservation status requests transmitted between nodes is achieved by the device Resv message in the RSVP message, and the message in the RSVP message by ResvErr to feedback processing reservation status request for errors.

[0038] 具体地,如图1所示,Rl发起LSPl (R1-R2-R3-R4-R5)的建立,即数据流的头节点设备Rl逐跳向下游节点设备发送Path消息,该Path消息会沿着数据流所经路径传送到数据流的尾节点设备R5 ;之后,再从尾节点设备R5逐跳向上游节点设备发送RESV消息,并在处理Resv消息时分配标签,预留资源,以建立LSP。 [0038] Specifically, as shown in FIG. 1, Rl initiates a LSPl (R1-R2-R3-R4-R5), i.e., the head data stream Rl node device sends a Path message hop by hop downstream node device, the Path message the data will flow along the path through the end of the node device R5 transmits to the data stream; after then hop by hop from the tail node device R5 transmits RESV message to the upstream node devices, and assigned label processing Resv message, reserved resources to the establishment of LSP.

[0039] 本实施例中,LSPl具有快速重路由属性,RSVP则在PATH消息的SESS1NATTRIBUTE(会话属性)对象中增加局部保护标记、记录标签标记、SE风格标记的标记。 [0039] In this embodiment, LSPL FRR having attributes, the RSVP increase in partial protection flag SESS1NATTRIBUTE PATH message (session attributes) object, record label tag, SE style flag. 如果还为该LSPl指定带宽,则还会有带宽保护的标记。 If you have specified for the LSPl bandwidth, the bandwidth will be protected mark. 下游节点设备在收到该PATH消息以后,通过局部保护标记,就能分辨出该LSP是一条需要快速重路由保护的LSP。 Downstream node device after receiving the PATH message, by partial protection flag, is able to tell that the LSP requires a fast reroute protection LSP. 另外,本实施例中的Path消息中必须携带RR0(Record Route 0bject,记录路由对象),即记录每一跳的出接口地址,这样,当Path消息到达尾节点设备R5时,R5就会知道该LSPl所经过的每一跳网元的出接口地址,具体的信息如下: Further, in the embodiment of the present embodiment in the Path message must carry RR0 (Record Route 0bject, record route object), i.e., a record of each hop interface address, so that, when the end of the Path message reaches node device R5, R5 will know that LSPl each hop through which the interface address of the network element, the specific information is as follows:

[0040] Rl的出接口11的地址,R2的出接口21的地址,R3的出接口31的地址,R4的出接口41的地址。 [0040] Rl address of the interface 11, the interface 21 of the address of R2, R3 is the address of the interface 31, the interface 41 of the address R4.

[0041] 而各个节点设备向上游节点设备发送RESV消息时,则会在该RESV消息的RRO中记录Resv消息的出接口、LSR ID和标签。 [0041] and each node device, the device will record the time of sending the RESV message upstream node RRO of the Resv message RESV message the outgoing interface, LSR ID, and tags. 这些信息将被逐跳累计传递到各个上游节点设备。 This information will be transmitted to the respective accumulated hop upstream node devices. 各节点设备第一次收到RESV消息时,根据RRO中记录的这些信息,为该LSP选择合适的Bypass LSP。 When each node receives the RESV message the first device, according to the information recorded in RRO, select the appropriate Bypass LSP for the LSP. 比如,本实施例中,R2节点设备选择保护其出接口21,就会为主LSPl选择保护的LSP3 (R2-R6-R4)为节点保护。 For example, in this embodiment, the node device R2 which is the choice of protecting the interface 21, will be selected based LSPl protected LSP3 (R2-R6-R4) protected node. 还可以在向上游节点设备发送RESV消息的RECORDROUTE对象中指明该LSP是否已经被保护。 It may also be specified in the RESV message sent to the upstream node device RECORDROUTE object if the LSP is protected. 如果有保护,会记录下这个被保护的出接口地址(R2的21)和Resv消息的出接口(R2的22)。 If there are protected, this protected record the address of the egress interfaces (21 R2) and the Resv messages (R2 22). 如果没有保护,RRO中相应的标志会被清除,只记录RESV消息的出接口(R2的22)。 Without protection, the RRO corresponding flag is cleared, a record only an interface (R2 of 22) RESV message.

[0042] 其中,当LSPl的Path消息到达尾节点设备R5后,R5通过查看LSPl中Path消息的RRO对象即可知道LSPl经过的每一跳的地址,R5根据这些信息可以建立同LSPl路径严格一致的反方向LSP2。 [0042] wherein, when LSPl Path message reaches the end of the node device R5, R5 LSPl by viewing the RRO in the Path message to know the address of each hop LSPl passes, R5 may be established in accordance with strict consistent with the path information LSPl in the opposite direction LSP2. 当然,R5上面保存的有关LSPl的状态信息中有LSPl的带宽参数等TE (Traffic Engineering,流量工程)信息,R5可以根据这些参数使得建立的LSP2的TE属性同LSPl —致。 Of course, the status information saved LSPl R5 have the above LSPl bandwidth parameters TE (Traffic Engineering, TE) information, R5 may LSPl with these parameters such that the TE attribute of the established LSP2 - induced. R5可以在接收到LSPl的Path消息立即触发建立LSP2。 R5 can be established in LSP2 received LSPl Path message immediately triggered. 但考虑到R5在接收到LSPl的Path消息立即触发建立LSP2时可能存在LSPl建立不成功的情况,因此,在优选方案中,尾节点设备R5收到LSPl的Resv Err消息后再触发建立LSP2。 However, considering the Path message received R5 LSPl triggering immediate establishment LSPl possible to establish when LSP2 unsuccessful, and therefore, in a preferred embodiment, the tail node device R5 receives the Resv Err LSPl established LSP2 message after triggering. 当然,R5也可以选择在接收到LSPl的ResvConf (预留确认)消息,确保LSPl已经建立成功的情况下,再触发建立LSP2。 Of course, R5 can also choose ResvConf received LSPl the (reservation confirmation) messages, it has been established to ensure LSPl case of success, and then trigger the establishment of LSP2.

[0043] 由于LSP2是基于LSPl的触发建立的,因而在LSP2的Path消息中可以不用携带RRO对象,但是在Resv消息中必须携带;其余的建立流程同LSPl的建立流程完全一致。 [0043] Since LSP2 is based LSPl triggering established, thus LSP2 Path message can not carry the RRO object, but must be carried in the Resv message; the rest of the setup process is completely consistent with LSPl setup procedure. 本实施例中,R4节点设备选择保护其出接口42,建立的保护隧道为LSP4(R4-R7-R3),即为链路保护。 In this embodiment, R4 node apparatus selects an interface 42 which is protected, the protection tunnel established for LSP4 (R4-R7-R3), is the link protection.

[0044] LSPl触发LSP2的机制可以为在LSPl的Path消息的LSP Attribute Flags对象中扩展一个标志位,指示目的节点创建一个反方向的LSP ;也可以是在LSPl的Path消息中的指示尾节点设备R5在ERO对象中扩展一个标志位,该标志位指示目的节点创建一个反方向的LSP ;当然也可以是别的对象中扩展一个用于指示需要建立反方向LSP的标志位;所有这些应该都在本发明的范围内。 [0044] LSPl trigger LSP2 mechanism may be extended a flag bit LSP Attribute Flags objects LSPL the Path message, indicating the destination node creates a reverse direction of the LSP; may be indicative of the end node device LSPL Path message in R5 expansion in the ERO in a flag, the flag indicating the destination node creates a reverse direction of the LSP; of course, can be extended for other objects indicating the need to establish a flag in the opposite direction of the LSP; all of which should be in within the scope of the invention.

[0045] 当网络出现故障时,本实施例中为节点设备R3和R4之间出现链路故障,那么节点设备R2作为LSPl的PLR(Point of Local Repair,本地修复节点)可以基于某种机制检测到该故障后,将LSPl上的数据流切换到LSP4上去,节点设备R4作为LSPl的MP(MergePoint,合并节点)再将LSP4上的数据流导入到LSPl上去。 [0045] When a network failure, in this embodiment a link failure occurs between the node devices R3 and R4, the node device R2 LSPl as a PLR (Point of Local Repair, local repair node) may be based on some detection mechanism after the fault, the data stream is switched to the LSPl LSP4 up, the node device R4 as LSPl data on the MP (MergePoint, combined node) and then flows into LSPl LSP4 up. 其中,节点设备R2所采用的检测机制可以是基于物理的,比如接收端的光功率低于某个阈值时判断发生链路故障;也可以是基于传送平面OAM机制,比如有连续几个BFD (Bidirect1nal Forwarding Detec1n,双向转发探测)报文接收不到时判断发生链路故障;或者是基于控制面错误故障通告的,比如R2接收到PathErr消息,指明R3-R4之间链路出现故障等。 Wherein the detection mechanism employed in the node device R2 may be based on the physical, such as optical power is lower than the receiving end of a link failure is determined when a certain threshold; may be based on a transport plane OAM mechanism, such as a few consecutive BFD (Bidirect1nal forwarding Detec1n, bidirectional forwarding detection) packet is determined not receive a link failure occurs; error or fault notification is based on the control plane, such as R2 PathErr message is received, indicating a link between the failure and the like R3-R4. 同理,节点设备R4作为LSP2的PLR点,也可以基于类似的上述的检测机制检测到该故障,并把LSP2上的数据流切换到LSP4上去,节点设备R3作为LSP2的MP (Merge Point,合并节点)再将LSP4上的数据流导入到LSP2上去。 Similarly, the node device R4 as PLR point of LSP2, may be similar to the detection based on the failure detection mechanism, and to switch the data stream to LSP4 LSP2 up, the node device R3 as the MP of LSP2 (Merge Point, combined node) then the data stream into the LSP4 LSP2 up.

[0046] 具体地,本实施例所提供的建立双向隧道的过程如图2所示,包括以下步骤: The process of establishing a bidirectional tunnel embodiment is provided [0046] In particular, the present embodiment 2, comprising the steps of:

[0047] 步骤201:首节点设备Rl发起LSPl (R1-R2-R3-R4-R5)的建立请求,向相邻下游节点设备R2发送Path消息,该Path消息中携带RRO (Record Route 0b ject,记录路由对象)信息,该RRO信息包括Rl ; [0047] Step 201: The first node apparatus Rl initiates LSPl (R1-R2-R3-R4-R5) establishment request, sends a Path message downstream neighbor node device R2, the Path message carries RRO (Record Route 0b ject, record route object) information, which includes information RRO Rl;

[0048] 步骤202:节点设备R2接收上述Path消息,记录首节点设备Rl的出接口地址,并从所接收到的Path消息中获取RRO信息,根据所获取的RRO信息向节点设备R3发送Path消息,该Path消息中携带RRO信息包括R1-R2 ; [0048] Step 202: the node device R2 receives the Path message, the recording head node apparatus Rl outgoing interface address, and acquires RRO information from the Path message is received, the transmission Path message to the device R3 node according to the RRO acquired information the Path message carries information including RRO R1-R2;

[0049] 步骤203:节点设备R3接收上述Path消息,记录节点R2设备的出接口地址,并从所接收到的Path消息中获取RRO信息,根据所获取的RRO信息向节点R4设备发送Path消息,该Path消息中携带RRO信息包括R1-R2-R3 ; [0049] Step 203: the node device R3 receives the Path message, recording the address of the interface node R2 device and acquires RRO information from the Path message is received, the transmission Path message to the node R4 apparatus according to the RRO acquired information, the Path message carries information including RRO R1-R2-R3;

[0050] 步骤204:节点设备R4接收上述Path消息,记录节点R3的出接口地址,并从所接收到的Path消息中获取RRO信息,根据所获取的RRO信息向节点设备R5发送Path消息,该Path消息中携带RRO信息包括R1-R2-R3-R4 ; [0050] Step 204: the node device R4 receives the Path message, recording the node R3 is an interface address, and acquires RRO information from the Path message is received, the transmission Path message to the device R5 node according to the RRO acquired information, the Path message carries information including RRO R1-R2-R3-R4;

[0051] 步骤205:尾节点设备R5接收上述Path消息,记录节点R4的出接口地址,建立LSPl ; [0051] Step 205: End node device R5 receives the Path message, the node interface address record R4 establish LSPL;

[0052] 步骤206:尾节点设备R5从所接收到的Path消息中获取RRO信息,根据所获取的RRO信息逐跳向上游发送RESV消息,接收到RESV消息各节点处理RESV消息时分配标签,预留资源,以建立同LSPl路径严格一致的反方向的LSP2。 [0052] Step 206: End node device R5 acquires RRO information from the Path message to the received, according RRO information acquired by hop sending RESV message upstream, receives the RESV message distribution labels processing RESV message each node, pre stay resources to establish strict agreement with LSPl path in the opposite direction of LSP2.

[0053] 其中,尾节点设备R5可以在接收到Path消息立即触发建立反方向的LSP2。 [0053] wherein, the tail node device R5 receives the Path message may be triggered immediately established LSP2 opposite direction. 但考虑到R5在接收到LSPl的Path消息立即触发建立LSP2时可能存在LSPl建立不成功的情况,因此,在优选方案中,尾节点设备R5收到LSPl的Resv Err消息后再触发建立LSP2。 However, considering the Path message received R5 LSPl triggering immediate establishment LSPl possible to establish when LSP2 unsuccessful, and therefore, in a preferred embodiment, the tail node device R5 receives the Resv Err LSPl established LSP2 message after triggering. 当然,R5也可以选择在接收到LSPl的ResvConf (预留确认)消息,确保LSPl已经建立成功的情况下,再触发建立LSP2。 Of course, R5 can also choose ResvConf received LSPl the (reservation confirmation) messages, it has been established to ensure LSPl case of success, and then trigger the establishment of LSP2.

[0054] 建立上述正反LSP后,若网络发生故障,则所建立的正反LSP分别进行路径切换操作,且路径切换操作后,正反LSP的路径仍需要保持一致。 After [0054] After establishing the above-described reverse LSP, if the network fails, the forward and reverse established LSP path switching operation, respectively, and the path switching operation, the reverse LSP path still need to be consistent. 具体地,可采用TE-FRR切换技术,即将protected-lsp的流量切换到backup-lsp上。 Specifically, TE-FRR switching technology employed, i.e. the protected-lsp traffic is switched to the backup-lsp.

[0055] 实施例二 [0055] Second Embodiment

[0056] 本实施例提供一种多协议标签交换系统,该系统至少包括: [0056] label switching system of the present embodiment provides a multi-protocol, the system comprising at least:

[0057] 首节点设备,主要用于在建立正向LSP的过程中,向其相邻下游节点设备发送携带记录路由对象(RRO)信息的路径消息,以及接收相邻上游节点设备发送的RESV消息,并建立与上述正向LSP路径完全一致的反向LSP ; [0057] First node apparatus, mainly used in the process of establishing the forward LSP, sending its neighboring downstream node device carries Record Route objects (the RRO) Path message information, and receiving a RESV message transmitted by an adjacent upstream node device and the establishment of the above-mentioned reverse LSP LSP path forward is completely consistent with;

[0058] 下游节点设备,用于向其相邻下游节点设备发送携带RRO信息的路径消息; [0058] downstream node means for transmitting the path message to its neighboring node device carries RRO downstream information;

[0059] 在优选实施例中,下游节点设备接收到路径消息时,还用于记录发送该路径消息的节点设备的出接口地址; [0059] In a preferred embodiment, the downstream node device upon receipt of the path message, is further configured to transmit the interface address of the Path message recording node device;

[0060] 上游节点设备,用于向其相邻上游节点设备发送RESV消息; [0060] the upstream node means for transmitting the RESV message upstream to its neighboring node device;

[0061] 在优选实施例中,上游节点设备在建立反向LSP的过程中,还用于通过其所记录的节点设备的出接口地址发送RESV消息。 [0061] In a preferred embodiment, the upstream node devices in the process of establishing the LSP in the reverse is also configured to send an RESV message via the interface address of the node device records it.

[0062] 尾节点设备,用于接收相邻下游节点设备发送的携带RRO信息的路径消息,建立上述正向LSP,以及按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 [0062] End node device for receiving an adjacent downstream node device transmits the Path message carries information RRO, the LSP establishing said forward, and RRO information according to the received path message, transmitting to the adjacent upstream node device RESV message.

[0063] 优选实施例中,尾节点设备在接收到正向LSP的资源预留错误(Resv Err)消息时,才按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 When the [0063] preferred embodiment, the tail node device reservation error (Resv Err) forward message received LSP in the resource, only path information according RRO message received in, to the adjacent upstream node device sends a RESV news.

[0064] 实施例三 [0064] Example three

[0065] 本实施例提供一种节点设备,该设备至少包括: [0065] The present embodiment provides a node device, the apparatus comprising at least:

[0066] 判断模块、用于判断本节点设备为首节点设备、尾节点设备、下游节点设备或者上游节点设备; [0066] determination means for determining the present node device as the ingress node device, the tail node device, the node device downstream or an upstream node apparatus;

[0067] 处理模块、当判断模块判断本节点设备为首节点设备时,向其相邻下游节点设备发送携带RRO信息的路径消息,以建立正向LSP,以及根据接收到的RESV消息,建立与正向LSP路径完全一致的反向LSP ; [0067] Processing module, the determining module determines when the present node device as an ingress node device transmits the Path message carries information RRO its neighboring downstream node apparatus to establish the LSP forward, and according to the received RESV message, and establishing positive LSP paths to exactly reverse LSP;

[0068]当判断模块判断本节点设备为下游节点设备时,则在接收到路径消息后,向其相邻下游节点设备发送携带RRO信息的路径消息; After [0068] When the determining module determines the present node device is a node of a downstream device, upon receiving the path message, transmits a path message carries information RRO its neighboring downstream node apparatus;

[0069] 当判断模块判断本节点设备为上游节点设备时,则在接收到RESV消息后,向其相邻上游节点设备发送RESV消息; [0069] When the determining module determines the current node is an upstream node equipment device, receiving the RESV message, sending RESV message upstream to its neighboring node device;

[0070] 当判断模块判断本节点设备为尾节点设备时,根据所接收的携带RRO信息的路径消息,建立正向LSP,以及按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 [0070] When the determining module determines the end of the present node device is a node device according to the Path message carries the RRO of the received information, the establishment of the LSP forward, and the RRO information according to the received Path message in to the adjacent upstream node device sends the RESV message.

[0071] 在优选的实施例中,当判断模块判断本节点设备为下游节点设备时,处理模块还用于记录发送该路径消息的节点设备的出接口地址; An interface address of the node device [0071] In a preferred embodiment, when the determining module determines the present node device is a downstream node device, the processing module is further configured to send the record of the path message;

[0072] 当判断模块判断本节点设备为上游节点设备时,处理模块用于通过其所记录的节点设备的出接口地址发送RESV消息。 [0072] When the determining module determines the present node device is an upstream node device, the processing means for transmitting the RESV message via an interface address of the node device records it.

[0073]当判断模块判断本节点设备为尾节点设备时,处理模块,在接收到正向LSP的Resv Err消息时,才按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 [0073] When the determination module determines that the path information message RRO present node device is the tail node device, the processing module, upon receiving the LSP Resv Err forward message only in accordance with the received, to the adjacent upstream node device send RESV message.

[0074] 以上说明,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何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,都应涵盖在本发明的保护范围之内。 [0074] described above, the present invention is merely preferred specific embodiments, but the scope of the present invention is not limited thereto, any skilled in the art in the art within the scope of the invention disclosed can be easily thought of changes or replacements shall fall within the protection scope of the present invention. 因此,本发明的保护范围应该以权力要求书的保护范围为准。 Accordingly, the scope of the present invention, the scope of the claims should prevail power.

Claims (11)

  1. 1.一种双向隧道的建立方法,其特征在于,该方法采用正向标签交换路径LSP触发反向LSP机制,包括: 建立正向标签交换路径LSP的过程中,首节点设备通过各下游节点设备向尾节点设备发送路径消息,其中,除所述尾节点设备以外的各下游节点设备在向其相邻下游节点设备发送的路径消息中携带记录路由对象RRO信息,所述尾节点设备接收到所述路径消息,建立所述正向LSP ;所述记录路由对象RRO记录每一跳的出接口地址; 所述尾节点设备按照所接收到的路径消息中的RRO信息,通过各上游节点设备向所述首节点设备发送资源预留RESV消息,所述首节点设备接收到所述RESV消息,建立与所述正向LSP路径完全一致的反向LSP。 1. A method for establishing a bi-directional tunnel, wherein the method uses a label switched path LSP forward reverse LSP triggering mechanism, comprising: establishing a label switched path LSP forward in the process, the first node device via the respective downstream node apparatus transmission path to the end node device message, wherein each of the downstream node apparatus other than the apparatus carrying the tail node record route object RRO information transmitted path message to its neighboring downstream node device, the node device to receive the tail said path message, the LSP establishing the forward direction; RRO recording the recording target route outgoing interface address of each hop; tail node device according to the RRO path information to the received message, through the device to the upstream node said first node device transmits a resource reservation RESV message, the first node device receiving the RESV message, consistent with the established LSP path forward reverse LSP.
  2. 2.如权利要求1所述的方法,其特征在于,该方法还包括: 建立所述正向LSP的过程中,包括尾节点设备的各下游节点设备接收到路径消息时,还记录发送该路径消息的节点设备的出接口地址; 在建立所述反向LSP的过程中,各上游节点设备通过其所记录的节点设备的出接口地址发送所述RESV消息。 2. The method according to claim 1, wherein the method further comprises: establishing an LSP in the forward direction, each of the downstream node apparatus comprises a tail node device upon receipt of the path message, the path also send the record an interface address of the node device of the message; the reverse in the process of establishing an LSP, the upstream node of each device sends the RESV message by the node address of the interface device to which it is recorded.
  3. 3.如权利要求1或2所述的方法,其特征在于, 当所述尾节点设备接收到所述正向LSP的资源预留错误Resv Err消息时,才按照所接收到的路径消息中的RRO信息,通过各上游节点设备向所述首节点设备发送RESV消息。 Path message 3. The method of claim 1 or claim 2, wherein, when the error message Resv Err node device of the tail of the forward LSP receiving the resource reservation only in accordance with the received RRO information transmitting the RESV message to the first node upstream of each node apparatus by apparatus.
  4. 4.如权利要求3所述的方法,其特征在于, 当网络发生故障时,上述正向LSP和反向LSP分别进行路径切换。 4. The method according to claim 3, wherein, when a network failure occurs, the above-described forward and reverse LSP path switching LSP respectively.
  5. 5.如权利要求4所述的方法,其特征在于, 所述各上游节点设备接收到所述RESV消息时,分配标签,预留资源,以建立所述反向LSP0 5. The method of claim 4, wherein each of said upstream node apparatus receives the RESV message, assign labels, reserving resources, to establish the reverse LSP0
  6. 6.一种多协议标签交换系统,其特征在于,该系统采用正向标签交换路径LSP触发反向LSP机制,包括: 首节点设备,用于在建立正向标签交换路径LSP的过程中,向其相邻中间节点设备发送携带记录路由对象RRO信息的路径消息,以及接收相邻中间节点设备发送的资源预留RESV消息,并建立与所述正向LSP路径完全一致的反向LSP ;所述记录路由对象RRO记录每一跳的出接口地址; 中间节点设备,是位于首节点设备和尾节点设备之间的各节点设备,用于在建立正向标签交换路径LSP的过程中,接收来自首节点设备或相邻中间节点设备的携带记录路由对象RRO信息的路径消息并向其相邻中间节点设备或尾节点设备发送携带记录路由对象RRO信息的路径消息,以及在建立反向标签交换路径LSP的过程中,接收来自尾节点设备或相邻中间节点设备的资源预留RESV消息并向其相邻中 A multi-protocol label switching system, characterized in that the system uses label switched paths LSP forward reverse LSP triggering mechanism, comprising: a first node apparatus for establishing a forward process of a label switched path LSP, the its neighboring intermediate nodes path message carrying the recording device transmits the routing information of the object RRO, and receives the neighbor resource reservation intermediate node device transmitting the RESV message, and fully consistent with the established LSP path forward reverse LSP; the record route objects RRO recording an interface address of each hop; intermediate node device, each node device is a node device at the head and tail nodes between the devices, for establishing a label switched path LSP forward in the process, the first receiving path path message carries the message record route object node or an adjacent intermediate node device equipment information of RRO and its neighboring node device or an intermediate device sends the end node carrying information of RRO record route object, and the establishment of a label switched path LSP in a reverse process, the device receives the resource from the tail node or an adjacent intermediate node device reservation RESV message to its neighbors in 节点设备或首节点设备发送资源预留RESV消息; 尾节点设备,用于接收相邻中间节点设备发送的携带RRO信息的路径消息,建立所述正向LSP,以及按照所接收到的路径消息中的RRO信息,向相邻中间节点设备发送RESV消息,建立与所述正向LSP路径完全一致的反向LSP。 A first node or a node device resource reservation RESV message transmission device; device tail node, an intermediate node device transmits the Path message carries the information received adjacent RRO, the LSP establishing the forward, and in accordance with the received path message, RRO of information, sending the RESV message to a neighboring intermediate node device, consistent with the established LSP path forward reverse LSP.
  7. 7.如权利要求6所述的系统,其特征在于, 所述中间节点设备,在建立正向标签交换路径LSP的过程中,在接收到路径消息时,还用于记录发送该路径消息的首节点设备或相邻中间节点设备的出接口地址; 所述中间节点设备,在建立所述反向LSP的过程中,还用于通过其所记录的首节点设备或相邻中间节点设备的出接口地址发送所述RESV消息。 7. The system according to claim 6, wherein said intermediate node device, in the process of establishing a label switched path LSP forward of, upon receiving the path message, the first record is further configured to send the path message the intermediate node or an adjacent node device the device address of the interface; said intermediate node device, in the process of establishing the LSP in reverse, is also used by the first node of the interface device that has been recorded or adjacent the intermediate node apparatus transmitting the RESV message address.
  8. 8.如权利要求6或7所述的系统,其特征在于, 所述尾节点设备,在接收到所述正向LSP的资源预留错误Resv Err消息时,才按照所接收到的路径消息中的RRO信息,向相邻中间节点设备发送RESV消息。 8. The system of claim 6 or claim 7, characterized in that the tail node device, receives the forward resource reservation LSP Resv Err Error message, only follow the path of the received message RRO of information, sending the RESV message to a neighboring node device intermediate.
  9. 9.一种采用如权利要求1所述双向隧道的建立方法的节点设备,其特征在于,该设备包括: 判断模块、用于判断本节点设备为首节点设备、尾节点设备、下游节点设备或者上游节点设备; 处理模块、当所述判断模块判断本节点设备为首节点设备时,向其相邻下游节点设备发送携带记录路由对象RRO信息的路径消息,以建立正向标签交换路径LSP,以及根据所接收的RESV消息,建立与所述正向LSP路径完全一致的反向LSP ; 当所述判断模块判断本节点设备为下游节点设备时,则在接收到路径消息后,向其相邻下游节点设备发送携带RRO信息的路径消息; 当判断模块判断本节点设备为上游节点设备时,则在接收到RESV消息后,向其相邻上游节点设备发送RESV消息; 当判断模块判断本节点设备为尾节点设备时,根据所接收的携带RRO信息的路径消息,建立所述正向LSP,以 A node device using the method for establishing a bi-directional tunnel as claimed in claim wherein, the apparatus comprising: determining means for determining the node device, the tail node device, the node downstream or an upstream apparatus of the present node device headed node device; processing module, the judging module determines when the present node device as the ingress node device, the device transmits to its neighboring downstream node carrying information record route object RRO path message to establish the forward path of the LSP label switching, and in accordance with the RESV message received, consistent with the established LSP path forward reverse LSP; when the determining module determines that the present node device is a downstream node device, after receiving the path message, to its neighboring downstream node device send path message carrying the RRO information; determining module determines when the present node device is the upstream node devices, then the RESV message is received, its upstream neighbor node device sends the RESV message; determining module determines if the present node device is a tail node when the apparatus according to the path message carries the RRO information received, the LSP establishing the forward, to 按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 RRO path information according to the received message, the RESV message sent to an adjacent upstream node device.
  10. 10.如权利要求9所述的设备,其特征在于, 当所述判断模块判断本节点设备为所述下游节点设备时,所述处理模块还用于记录发送该路径消息的节点设备的出接口地址; 当所述判断模块判断本节点设备为所述上游节点设备时,所述处理模块用于通过其所记录的节点设备的出接口地址发送所述RESV消息。 10. The apparatus according to claim 9, wherein, when the determination means determines the node device of the present apparatus to the downstream node, the processing module is further configured to route the message to the sending interface record node apparatus address; when the determination means determines said present node device to the upstream node device, the processing means for transmitting the RESV message by the node address of the interface device records it.
  11. 11.如权利要求9或10所述的设备,其特征在于, 当所述判断模块判断本节点设备为所述尾节点设备时,所述处理模块,在接收到所述正向LSP的资源预留错误Resv Err消息时,才按照所接收到的路径消息中的RRO信息,向相邻上游节点设备发送RESV消息。 11. The apparatus of claim 9 or claim 10, wherein, when the determination means determines said present node device is a tail node device, the processing module, receiving the forward LSP to the resource pre when left Resv Err error message before RRO information according to the received path message, the RESV message sent to an adjacent upstream node device.
CN 201010290498 2010-09-20 2010-09-20 Establish multi-protocol label switching systems, node devices and two-way tunnel CN101945049B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010290498 CN101945049B (en) 2010-09-20 2010-09-20 Establish multi-protocol label switching systems, node devices and two-way tunnel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 201010290498 CN101945049B (en) 2010-09-20 2010-09-20 Establish multi-protocol label switching systems, node devices and two-way tunnel
PCT/CN2011/075758 WO2012037820A1 (en) 2010-09-20 2011-06-15 Multi-protocol label switch system, node device and method for establishing bidirectional tunnel

Publications (2)

Publication Number Publication Date
CN101945049A true CN101945049A (en) 2011-01-12
CN101945049B true CN101945049B (en) 2015-12-16

Family

ID=43436831

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010290498 CN101945049B (en) 2010-09-20 2010-09-20 Establish multi-protocol label switching systems, node devices and two-way tunnel

Country Status (2)

Country Link
CN (1) CN101945049B (en)
WO (1) WO2012037820A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101945049B (en) * 2010-09-20 2015-12-16 中兴通讯股份有限公司 Establish multi-protocol label switching systems, node devices and two-way tunnel
CN102655472B (en) * 2011-03-04 2017-07-14 中兴通讯股份有限公司 Utilizing distributed establishing a label switched path signaling method and system
EP2719116A1 (en) * 2011-06-10 2014-04-16 Telefonaktiebolaget L M Ericsson (PUBL) Method of and apparatus for configuring quality of service
CN102857386B (en) * 2011-06-30 2017-06-13 中兴通讯股份有限公司 A method for maintaining end node identification and acquisition means
CN103067271B (en) * 2011-10-19 2018-02-27 中兴通讯股份有限公司 Method and device to realize the bidirectional path
CN102611569B (en) * 2011-12-21 2014-12-03 华为技术有限公司 Path display method and device in service deployment and communication system
CN102647340A (en) * 2012-03-22 2012-08-22 中兴通讯股份有限公司 Loose node in RSVP-TE (Resource Reservation Protocol-Traffic Engineer) tunnel and path calculation method of loose node
CN104135423B (en) * 2014-08-21 2018-03-23 新华三技术有限公司 A two-way tunnel establishment method and apparatus
CN105591862A (en) * 2014-10-20 2016-05-18 中兴通讯股份有限公司 Tunnel path computation re-optimization method and device
CN106034076A (en) * 2015-03-12 2016-10-19 中兴通讯股份有限公司 Method and system for realizing path calculation, and path calculation node

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101197777A (en) * 2006-12-04 2008-06-11 阿尔卡特朗讯公司 Method for setting up a two-directional connection
CN101388823A (en) * 2008-11-05 2009-03-18 杭州华三通信技术有限公司 Method and apparatus for establishing bidirectional flow engineering tunnel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7496105B2 (en) * 2004-11-05 2009-02-24 Cisco Technology, Inc. System and method for retrieving computed paths from a path computation element using encrypted objects
JP2008193395A (en) * 2007-02-05 2008-08-21 Fujitsu Ltd Two-way path setting method, and communication system and node device for achieving it
CN101577657B (en) * 2008-05-08 2012-05-23 华为技术有限公司 Method of tunnel establishment and system for realizing tunnel establishment
CN101945049B (en) * 2010-09-20 2015-12-16 中兴通讯股份有限公司 Establish multi-protocol label switching systems, node devices and two-way tunnel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101197777A (en) * 2006-12-04 2008-06-11 阿尔卡特朗讯公司 Method for setting up a two-directional connection
CN101388823A (en) * 2008-11-05 2009-03-18 杭州华三通信技术有限公司 Method and apparatus for establishing bidirectional flow engineering tunnel

Also Published As

Publication number Publication date Type
WO2012037820A1 (en) 2012-03-29 application
CN101945049A (en) 2011-01-12 application

Similar Documents

Publication Publication Date Title
Sharma et al. Framework for multi-protocol label switching (MPLS)-based recovery
US7804767B1 (en) Protection/restoration of MPLS networks
US7133358B2 (en) Failure control unit
US7373401B1 (en) Label switched path OAM wrapper
US7433301B2 (en) Method of transferring packets and router device therefor
US6987727B2 (en) Automatic protection switching using link-level redundancy supporting multi-protocol label switching
US7315510B1 (en) Method and apparatus for detecting MPLS network failures
US20030063560A1 (en) Protection switching in a communications network employing label switching
US6535481B1 (en) Network data routing protection cycles for automatic protection switching
US20060159009A1 (en) Fast rerouting apparatus and method for MPLS multicast
US20050237927A1 (en) Transmission apparatus
US7697417B2 (en) Methods and devices for re-routing MPLS traffic
US7298693B1 (en) Reverse notification tree for data networks
US20020110087A1 (en) Efficient setup of label-switched connections
US20020133756A1 (en) System and method for providing multiple levels of fault protection in a data communication network
US20020172149A1 (en) Method and apparatus for protection path setup
US20070183317A1 (en) Technique for determining whether to reestablish fast rerouted primary tunnels based on backup tunnel path quality feedback
US20070019646A1 (en) Method and apparatus for constructing a repair path for multicast data
US20080304407A1 (en) Efficient Protection Mechanisms For Protecting Multicast Traffic in a Ring Topology Network Utilizing Label Switching Protocols
US20070011284A1 (en) Dynamic distributed method for local protection of a label switching path
US7602702B1 (en) Fast reroute of traffic associated with a point to multi-point network tunnel
US20090225652A1 (en) Locating tunnel failure based on next-next hop connectivity in a computer network
US6848062B1 (en) Mesh protection service in a communications network
US20080304494A1 (en) Communication device
US20060203720A1 (en) Data relay apparatus and data relay method

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C14 Grant of patent or utility model