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
Prior art keywords
node device
message
lsp
path
forward
Prior art date
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, method for establishing a node device and a bi-directional tunnel, belonging to the data field of network communications. 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: establishing a forward LSP process, the first node device message to the transmitting path node apparatus the tail through the downstream node devices, wherein each of the downstream node device other than the tail node device in its neighboring downstream node path message sent by the device carries RRO information, the tail node apparatus receives the path message, establishing said forward the LSP; RRO information of the path message from the tail node device according to the received in, through the upstream node device sends the RESV message to the first node apparatus, the first node device receiving the RESV message, to establish a fully coincident with the forward LSP paths 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 section protection 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 network communications, 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 on RFC3209 described between two LSR (Label Switch Router, label switching router) program to establish the unidirectional LSP (label Switch path, LSP), may also be based scheme RFC3473 described, establishing a 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 data stream in the LSP, the existing protection technology can be divided end protection and section 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 protected at all times, so that after the detection of LSP fails, traffic is switched slower; thus the protection switching time requirements under more demanding circumstances (such as to meet the protection of 50ms switchover request), 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 one-way protection needs segment LSP of RFC4090 overall description, but for bidirectional LSP of 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 carrying Associat1n in the signaling message (related) objects, Protect1n (protected) objects and Secondary Explicit Route (Ci explicit route object) in a manner to meet the bidirectional LSP protection needs segments. 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 / do not support these objects on MPLS equipment, requiring a more concise way to deploy two-way LSP of 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 quickly to a bi-directional tunnel to protect - reduce the loss of data, the present invention provides a multi-protocol label switching system, establishing method node device and two-way tunnels.

[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 forward label switched path (LSP), the first node device via the respective downstream node devices message sends a path node apparatus tail, wherein, in addition to the tail node device each downstream node device to which phase path message neighbor downstream node device sends carries record route object (the RRO) information, the tail node apparatus receives the path message, establishing said forward the LSP;

[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 tail node device according RRO information of the received path message, through the upstream node device to the first device sends a resource node reservation (RESV) message, the first node device receiving the RESV message, to establish exactly coincident with the forward LSP paths 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 comprises: establishing the forward outgoing interface address of the node device of the LSP, the time including the downstream node device tail node device receives the path message, but also send the record of the path message;

[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, each upstream node device transmitting the RESV message via an interface address of the node 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 information of the path message [0011] wherein, when the tail node device receives the forward LSP resource the reservation error (Resv Err) message only in accordance with the received in, through the upstream node device to the said first node device transmitting 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 LSP and the reverse LSP with path switching is performed.

[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 respective upstream node apparatus 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, for the process of establishing the forward label switched path (LSP), the transmitting its neighboring downstream node device carries the record route object (the RRO) information Path message and receiving an upstream node adjacent equipment resource reservation transmission (the RESV) message, and the establishment of exactly the same with the forward LSP paths 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 device for transmitting carrying record route object (the RRO) Path message information 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 means for its upstream node device sends a resource adjacent 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 a downstream node device adjacent path message carries RRO information, establishing RRO information of said forward the LSP, and the Path message according to the 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, further to the interface address of the node device records sending 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 reverse LSP of further configured to transmit the RESV message via an interface address of the node 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。 [0021] The tail node device, upon receipt of the forward LSP resource reservation error (Resv Err) message, only in accordance with the received Path message RRO information, to a neighboring upstream node device sends RESV messages.

[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] judging module configured to judge this node device headed node device, the tail node device, downstream node device or the upstream node equipment;

[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] The processing module, when the determining module determines that the present node device as an ingress node device can transmit a record route object (the RRO) Path message information to its neighboring downstream node apparatus to establish the forward label switched path (LSP) and according to the RESV message received, establishing the forward LSP paths exactly 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 downstream node device, receiving the path message, the message carrying RRO information to route the message to 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 present node device to the upstream node devices, then the RESV message is received, transmitting the RESV message to its neighboring upstream node equipment;

[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 present node device is a tail node apparatus, according to the Path message carries the RRO of the information received, the establishment of RRO information of the LSP, and the Path message according to the 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 determining module determines that the present node device to the downstream node device, the processing module is further used for the interface address records are sent to the Path message 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 the present node device to the upstream node device, the processing means for transmitting the RESV message via an interface address of the node device to which it is recorded.

[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 the present node device to the tail node device, the processing module, when the reservation error (Resv Err) message received resource to the forward LSP, 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 bidirectional LSP segment protection is 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 on and constitute a part of the specification, and 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 bidirectional tunnel FRR embodiment 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 establish a bidirectional tunnel embodiment of the present embodiment.

具体实施方式 Detailed ways

[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] Hereinafter, in conjunction with the accompanying drawings and the embodiments will be described in detail embodiments of the present invention, thereby fully understand how the present invention employs technical means to solve the technical problem, and achieve implementation technical effect 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 between the node devices path state request Path message RSVP (ResourceReservat1n Protocol, Resource Reservation Protocol) messages to achieve, and reserve the error by the RSVP message is a PathErr (resource ) message to the feedback processing path state request whether an error occurred; reservation state transfer between the node devices request achieved by Resv message in the RSVP message, and by ResvErr message in the RSVP message to the 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 first node apparatus Rl data stream hop transmits a Path message to the downstream node device, the Path message It will be the via path along the data stream is transmitted to the end node device R5 data stream; after then hop by hop from the device R5 tail node message to the device sending RESV upstream node, and assign labels in processing Resv message, the 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 fast reroute property, the RSVP is increased partial protection flag in 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 for LSPl specified bandwidth, then there will be a bandwidth protection of the 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, be able to tell that the LSP is a need for 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, the present embodiment Path message Examples of must carry RR0 (Record Route 0bject, record route object), i.e. recording of each hop an interface address, so that, when the Path message reaches the end of the node device R5, R5 will know that LSPl through which each hop network element of the interface address, 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] address of the outgoing interface 11 Rl, address the interface 21 of the R2 and the R3 address interface 31, the address of the interface 41 of 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 is logged to the upstream device sends the RESV message node RRO of the RESV message Resv message in 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 accumulated hop by hop transferred to upstream node apparatus. 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 of the node devices receive the RESV message, 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, R2 node apparatus selects protect the interface 21, will mainly LSPl selected protected LSP3 (R2-R6-R4) node protection. 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 the protective, it will record this protected outgoing interface address of the egress (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)。 If there is no protection, RRO corresponding flag is cleared, only records RESV message the outgoing interface (R2 22).

[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 by looking LSPl in the Path message the RRO to know each hop address LSPl passes, R5 may be established exactly in LSPl route matching this information 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, information regarding the status LSPl saved R5 above have LSPl bandwidth parameters TE (Traffic Engineering, TE) information, R5 may be the same LSPl these parameters so that the TE attribute of LSP2 established - induced. R5可以在接收到LSPl的Path消息立即触发建立LSP2。 R5 can be received LSPl Path message immediately trigger the establishment of LSP2. 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。 But considering R5 Path message received LSPl triggering immediate establishment possible LSPl established unsuccessful LSP2 time, therefore, in a preferred embodiment, the tail node device R5 receives LSPl the Resv Err message then triggers established LSP2. 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) message, make sure LSPl established 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 the Path message of LSP2 can not carry 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 protect the interface 42, 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 another object extension for indicating the need to establish a flag in the opposite direction of LSP; all of which should be in the scope of the present invention therein.

[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 as LSPl a PLR (Point of Local Repair, local repair node) may be based on a mechanism detected after the fault, the data stream on the LSPl switched to LSP4 up, the node device R4 as data on LSPl the MP (MergePoint, combined node) then LSP4 stream into LSPl 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 node device R2 employed may be based on the physical, such as the receiving end of the optical power is lower than determining a link failure occurs 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) message is not received is determined that a link failure occurs; or based on erroneous fault notification control surfaces, such as R2 received PathErr message, indicating a link failure between R3-R4 and the like. 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, can be detected based on a similar above-described detection mechanism to the failure, and the switching data stream on LSP2 to LSP4 up, the node device R3 as the MP of LSP2 (Merge Point, combined node) and then LSP4 on the data stream into 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 the 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, transmits a Path message to an adjacent downstream node device R2, the Path message carries RRO (Record Route 0b ject, record route object) information, the RRO information comprises 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 RRO information comprises 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 RRO information comprises 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 RRO information comprises 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, recording node the interface address R4 to 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 with LSPl path strict consensus 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 may be receiving the Path message is triggered immediately LSP2 establish the reverse 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。 But considering R5 Path message received LSPl triggering immediate establishment possible LSPl established unsuccessful LSP2 time, therefore, in a preferred embodiment, the tail node device R5 receives LSPl the Resv Err message then triggers established LSP2. 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) message, make sure LSPl established 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 established forward and reverse LSP were path switching operation, and the path switching operation, forward and 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, employed TE-FRR switching technology, i.e. traffic protected-lsp 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] This label switched system embodiments provide 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 establishing the forward LSP process, transmits to its neighboring downstream node device carries the record route object (the RRO) information Path message, and receiving a RESV message sent by the upstream node devices adjacent and to establish a reverse LSP said forward LSP is entirely 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 device, a path message to its neighboring downstream node device carries RRO 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, further to the interface address records are sent to the Path message 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 to its neighboring upstream node equipment;

[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 during the establishment of the reverse LSP of further configured to send RESV message via an interface address of the node device to which it is recorded.

[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 a downstream node device adjacent path message carries RRO information, establishing said forward the LSP, and in accordance with the RRO information of the received path message, sending upstream node device to adjacent 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) message received resource to forward the LSP only according RRO information of the path message received in, to the upstream node device sends a RESV adjacent messages.

[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, downstream node apparatus 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] The processing module, when the judgment module judges that the present node device as an ingress node device transmits the Path message carrying the RRO information to its neighboring downstream node devices to establish forward the LSP, and according to the RESV message received, establishing positive the LSP is completely identical 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 downstream node device, receiving the path message, the message carrying RRO information to route the message to 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 present node device to the upstream node devices, then the RESV message is received, transmitting the RESV message to its neighboring upstream node equipment;

[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 present node device is a tail node apparatus, according to the Path message carries the RRO information received, to establish forward the LSP, and the RRO information of the path message according to the received in, to an 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 to the upstream node devices, the processing means for transmitting the RESV message via an interface address of the node device to which it is recorded.

[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 determining module determines the present node device is a tail node device, the processing module, receiving the forward LSP's Resv Err message, only in accordance with the received Path message RRO information, to a neighboring upstream node equipment 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 only 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 scope of the present invention should be power claims and their equivalents.

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。 Establishing method of a two-way tunnel, characterized in that the method uses forward label switched path LSP trigger reverse LSP mechanism, comprising: establishing a forward label switched path LSP process, the first node device via the respective downstream node apparatus to the transmission path node device end of the message, wherein each of the downstream node device other than the tail node device carries the record route object RRO information in the path message to its neighboring transmitting downstream node device, the tail node device to receive the said path message, establishing said forward the LSP; the record route objects RRO record for each hop of the interface address; the tail node device according RRO information of the received path message, through the upstream node device to the said first node device transmits a resource reservation RESV message, the first node device receiving the RESV message, to establish a fully coincident with the forward LSP paths 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. A method according to claim 1, wherein the method further comprises: establishing the forward an LSP, each downstream node apparatus comprises a tail node device upon receipt of the path message, but also send the record of the path an interface address of the node device of the message; during the establishment of the reverse LSP, each upstream node device transmitting the RESV message via an interface address of the node 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 Resv Err message of the tail node device receiving the resource of the forward LSP reservation only in accordance with the received in RRO information RESV message sent to the ingress node device through the upstream node devices.
  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. A method according to claim 3, wherein, when a network failure, the above-described forward LSP and the reverse LSP with path switching is performed.
  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 according to claim, characterized in that 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 forward label switched path LSP trigger reverse LSP mechanism, comprising: a first node device, for the process of establishing the forward label switched path LSP, if the path message adjacent the intermediate node device can transmit a record route object RRO information and resources received adjacent the intermediate transmission node device reservation RESV message, and establishing exactly coincident with the forward LSP paths reverse LSP; the record route objects RRO record for each hop of the interface address; intermediate node device, is each node device located on the first node device and a tail node devices between, for establishing the forward label switched path LSP process, received from the first path message path message carries the record route object node device or an adjacent intermediate node device RRO information to its neighboring intermediate node device or tail node device can transmit a record route object RRO information and the establishment of reverse label switched path LSP in process, receiving a resource from the tail node device 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。 Node device or the first node device sending a resource reservation RESV message; tail node apparatus, an intermediate node device Path message sent carries RRO information received adjacent establishing the forward the LSP, and in accordance with the received path message, RRO of information, sending the RESV message to a neighboring intermediate node device to establish fully consistent with the forward LSP paths 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. A system according to claim 6, wherein said intermediate node device, in the process of establishing the forward label switched path LSP's, upon receiving the path message, but also for the first recording transmitting the path message the node device or an adjacent intermediate node device of the address of the interface; said intermediate node device, in the process of establishing the reverse LSP, there is also used an interface via the first node apparatus that has been recorded or adjacent the intermediate node apparatus send the RESV message.
  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 6 or claim 7, characterized in that the tail node device, the resource receives the forward LSP reservation error Resv Err message, only follow the path message received in RRO of information, sending the RESV message to a neighboring intermediate node device.
  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 use of the node apparatus 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, downstream node apparatus or an upstream node apparatus headed node device; processing module, when the determining module determines that the present node device as an ingress node device transmits its neighboring downstream node device carries record route objects RRO information path message to establish the forward label switched path the LSP, and based on the RESV message received, to establish exactly coincident with the forward LSP paths 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 message carrying RRO information path message; if the judging module determines that the present node device to the upstream node devices, then the RESV message is received, its upstream node device transmitting the RESV message adjacent; when the determining module determines the present node device is a tail node when the apparatus according to the path message carries the RRO information received, establishing the forward the LSP, 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。 According RRO information of the path message received in transmitting the RESV message 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 determining module determines that the present node device to the downstream node device, the processing module is further used for the interface record transmits the Path message to the node device address; when the determining module determines that the present node device to the upstream node device, the processing means for transmitting the RESV message via an interface address of the node device to which it is recorded.
  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 9 or claim 10, wherein, when the determining module determines that the present node device to the tail node device, the processing module, upon receiving a Resource Reservation the forward LSP, when the left error Resv Err message only in accordance with the RRO information of 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 (11)

* 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
CN106534220A (en) * 2016-12-30 2017-03-22 北京奇虎科技有限公司 Bidirectional transmission method and device of streaming data

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
US7315510B1 (en) Method and apparatus for detecting MPLS network failures
Sharma et al. Framework for multi-protocol label switching (MPLS)-based recovery
US6535481B1 (en) Network data routing protection cycles for automatic protection switching
US6987727B2 (en) Automatic protection switching using link-level redundancy supporting multi-protocol label switching
US20070019646A1 (en) Method and apparatus for constructing a repair path for multicast data
US7804767B1 (en) Protection/restoration of MPLS networks
US20070183317A1 (en) Technique for determining whether to reestablish fast rerouted primary tunnels based on backup tunnel path quality feedback
US7602702B1 (en) Fast reroute of traffic associated with a point to multi-point network tunnel
US7298693B1 (en) Reverse notification tree for data networks
US7697417B2 (en) Methods and devices for re-routing MPLS traffic
US20030233595A1 (en) Distinguishing between link and node failure to facilitate fast reroute
US7058845B2 (en) Communication connection bypass method capable of minimizing traffic loss when failure occurs
US20070011284A1 (en) Dynamic distributed method for local protection of a label switching path
US20020112072A1 (en) System and method for fast-rerouting of data in a data communication network
US20090225652A1 (en) Locating tunnel failure based on next-next hop connectivity in a computer network
US20080304407A1 (en) Efficient Protection Mechanisms For Protecting Multicast Traffic in a Ring Topology Network Utilizing Label Switching Protocols
US20080304494A1 (en) Communication device
US20120051212A1 (en) System and method for fast network restoration
US6848062B1 (en) Mesh protection service in a communications network
US20060203720A1 (en) Data relay apparatus and data relay method
US20130232193A1 (en) Control-Plane Interface Between Layers in a Multilayer Network
JP2005252368A (en) Path calculation system and method, and communication node
US20070286069A1 (en) Method For Implementing Working/Standby Transmission Path
US20090323522A1 (en) Node apparatus and path setup method
US20130259056A1 (en) Oam label switched path for fast reroute of protected label switched paths

Legal Events

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