[go: up one dir, main page]

WO2007009347A1 - Méthode et appareil de transmission de flux de service sur un système d’échange virtuel - Google Patents

Méthode et appareil de transmission de flux de service sur un système d’échange virtuel Download PDF

Info

Publication number
WO2007009347A1
WO2007009347A1 PCT/CN2006/001593 CN2006001593W WO2007009347A1 WO 2007009347 A1 WO2007009347 A1 WO 2007009347A1 CN 2006001593 W CN2006001593 W CN 2006001593W WO 2007009347 A1 WO2007009347 A1 WO 2007009347A1
Authority
WO
WIPO (PCT)
Prior art keywords
path
service flow
service
dre
primary
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2006/001593
Other languages
English (en)
Chinese (zh)
Inventor
Xiaojun Duan
Lingyuan Fan
Yuepeng Chen
Dengchao Wu
Meng Ke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2007009347A1 publication Critical patent/WO2007009347A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/24—Multipath
    • H04L45/247—Multipath using M:N active or standby paths

Definitions

  • the present invention relates to the field of network communication technologies, and in particular, to a method and an apparatus for transmitting a service flow in a virtual switching system.
  • VPN/VPDN Virtual Dial-up Private Network
  • V-Switch Virtual Switching
  • L2TP Layer 2 Tunneling Protocol
  • MPLS Multi-Protocol Label Switching
  • the V-Switch technology is mainly used to build a stable, practical, and economical carrier-class metro Ethernet. It can implement QoS guarantee, network security protection, carrier-class network maintenance and management functions, and has number-based user management and certain Core business management capabilities such as mobility, centralized management of business open management billing, and services such as intelligent Layer 2 traffic scheduling, LAN (local area network) private line, and IP traffic planning, which have filled the current network in pure two. Insufficient layering ability.
  • the V-Switch system is divided into three layers: the V-Switch service control layer, the V-Switch connection control layer, and the V-Switch bearer capability layer.
  • the service control layer completes the control of the service and the registration of the V-Switch private line, etc.; the connection control layer is used to maintain the exchange resources in the DRE (data forwarding entity), including devices, ports, links, VLANs (virtual local area networks), and accepts service control.
  • DRE data forwarding entity
  • the V-Switch establishment request of the layer SCR service control registration
  • the service flow path is selected for the V-Switch connection
  • the bandwidth and the VLAN (virtual local area network) resource are allocated, and the control information is sent to the DRE device through which the service flow passes; DRE is in the bearer capability layer, and it is set according to the connection control layer.
  • the VLAN switch entry completes the forwarding of the service flow in the Ethernet frame format.
  • the VLAN switch entries are as follows:
  • the DRE uses the VLAN switch table as the routing basis for service flow forwarding.
  • the forwarding process of the service data is described as follows:
  • the Ethernet frame of ID1 of the VLAN received in port 1 is sent to port 2, and the ID 1 of the VLAN is converted into the ID 2 of the VLAN; and the VLAN ID received in port 2 is received.
  • the Ethernet frame of 2 is sent to port 1, the ID2 of the VLAN is converted into the ID1 of the VLAN.
  • a virtual channel of a VLAN can be established throughout the network.
  • the virtual channel is described as:
  • the bearer capability layer itself has no fault recovery mechanism. Once a physical link between the DREs of the bearer capability layer fails, the V-Switch leased line service is removed, that is, when the bearer capability layer detects the virtual channel state failure. When the connection is closed and all the affected resources are released, the service is interrupted and the reliability of the leased line service is reduced.
  • the present invention provides a method and apparatus for transmitting a traffic flow in a virtual switching system to improve the reliability of transmission in a virtual switching system.
  • a method for transmitting a service flow in a virtual switching system comprising:
  • connection control layer selects two or more equivalent transmission paths for the service flow, determines the primary path, and sends the path selection message including the primary and secondary path information to the data forwarding entity DRE of the bearer capability layer;
  • DRE selects the primary path to transport the traffic.
  • connection control layer preferentially selects a path with a different DRE sequence as the equivalent transmission path, and secondly selects a path with the same DRE sequence but different physical links as the equivalent transmission path.
  • the path selection message delivery process specifically includes: sending, by the VSC of the connection control layer, the path information to the DRE in the form of a flow mapping command.
  • the process of determining the primary path includes:
  • connection control layer determines the path priority according to the number of DREs in the path, and specifies a shortest path with less DRE as the primary path, and the rest is the backup path.
  • the method further includes: determining a priority of the backup path according to the number of DREs, and the priority of the backup path with a small number of DREs is relatively high.
  • the method further includes: performing fault detection on the primary path and the backup path for performing service transmission in the virtual switching system; and switching the service to the backup when determining that the primary path is faulty and the backup path is normal Transfer on the path.
  • the process of switching from the primary path to the backup path is to select the highest priority backup path to switch according to the priority of the backup path in the non-faulty backup path.
  • the path switching process is initiated by the first and last DREs of the transport service flow and is transparent to the connection control layer.
  • the method further includes: when the primary path is normal and the backup path is faulty, the service bearer is not switched, only the failed backup path is recorded.
  • An apparatus for transmitting a service flow in a virtual switching system comprising: a transmission path selection module connected to a control layer, and a data forwarding entity DRE of a bearer capability layer, where
  • the transmission path selection module is configured to select two or more equivalent transmission paths for the service flow, determine the primary path, and send the path selection message including the primary and secondary path information to the data forwarding entity DRE of the bearer capability layer. ;
  • the DRE selects an active path to transport a service flow.
  • the device further includes: a link failure detecting module and a path switching module, wherein the link fault detecting module is configured to perform fault detection on the primary path and the backup path for performing service transmission in the virtual switching system;
  • the path switching module is notified to perform the switching operation.
  • the service bearer is not switched, and only the failed backup path is recorded;
  • the path switching module is configured to switch the service to a backup path according to the received handover notification.
  • connection control layer preferentially selects a path with a different DRE sequence as an equivalent transmission path, and secondly selects a path with the same DRE sequence but different physical links as an equivalent transmission path.
  • the present invention enables the bearer capability layer to have a fault recovery function.
  • the backup path mechanism is used to quickly switch services.
  • the reliability of the transmission in the virtual switching system is improved, the risk of service interruption of the leased line is reduced, the reliability of the leased line service is improved, and the stability of the network operation is enhanced.
  • the present invention is applicable to networks of any size, is easy to implement, and maintains management.
  • FIG. 1 is a schematic diagram of a prior art V-Switch architecture
  • FIG. 2 is a schematic diagram of a backup path of a bearer capability layer according to an embodiment of the invention.
  • connection control layer selects a service flow path, it selects two or more transmission paths for the service flow at the same time, and determines one of the primary paths, and the rest is a backup path, once the primary path is used.
  • the service flow layer can be automatically switched to the backup path to carry the fault recovery capability of the bearer capability layer of the V-Switch.
  • FIG. 2 is a schematic diagram of a backup path of a bearer capability layer according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a backup path operation according to an embodiment of the present invention. The present invention is described below with reference to FIGS. 2 and 3.
  • the V-Switch system in the embodiment shown in FIG. 2 and FIG. 3 includes a service control layer, a connection control layer, and a bearer capability layer, where the service control layer and the connection control layer may be one physical entity or two separate physical entities. .
  • the three representative entity names are SCR (V-Switch Service Control Entity), VSC (V-Switch Connection Control Entity), and DRE.
  • the method for transmitting a service flow in the virtual switching system includes:
  • Step 10 The VSC selects two or more equivalent paths for the service flow
  • Each link carries at least one V-Switch leased line service.
  • Each V-Switch leased line service is distinguished by a specific connection identifier.
  • the switch private line can carry the service flow data.
  • two or more equivalent paths are selected for the service flow, and are sent to the bearer capability layer in the form of a flow mapping command, and the service flow is identified by the bearer capability layer ⁇ flow mapping information, and the traffic is divided, and The sent path is carried.
  • the equivalent paths are mutually backup relationships, and there is no case where every DRE node and each link on the path are identical between any two equivalent paths. In this case, first ensure that the DRE sequences on different paths are as different as possible. Secondly, when the DREs are the same, the links between the DREs should be guaranteed to be different.
  • the specific method is that each VSC tries to select a path without the same DRE in the routing process.
  • the fault recovery method can be implemented in two cases: The first is that when a DRE on the primary path fails, it can be switched to the backup path that does not pass the DRE; the second is if the DRE is not faulty. If a link on the DRE is faulty, you can switch to another backup link of the DRE to carry the bearer. If no backup link is available, you can switch to the backup path that does not pass the DRE.
  • connection control layer selects a service flow path for a dedicated line between the user terminal 1 (UE1) and the UE2, and may follow the above-mentioned routing principle at the initial DRE 1 and terminate the DRE6.
  • two or more paths are selected end-to-end.
  • the first one is that the links ⁇ D, F, and H are connected end to end to form a path.
  • the DRE sequence of the service flow is: ⁇ DRE1, DRE2, DRE4, DRE5, DRE6>;
  • the second is a path consisting of 6 links A, C, E, G, K, and L.
  • the DRE sequence of the service flow is: DRE1, DRE3 DRE4, DRE5, DRE7, DRE8, DRE6>.
  • Step 11 Determine the priority of the selected path above
  • the priority of the path is determined.
  • the path priority can be determined according to the number of DREs passing through the path, that is, the length of the path.
  • a DRE number is specified.
  • the shortest path is the primary path, and the rest is the backup path.
  • the backup path can also determine the priority of the backup path according to the number of DREs.
  • the priority of the backup path with a small number of DREs is relatively high.
  • the principle of shortest priority of the path the above example can determine that the priority of the first path is higher than the priority of the second path.
  • Step 12 Deliver the selected path message to the bearer capability layer.
  • the VSC sends the path information to each DRE in the form of a flow mapping command, where the flow mapping command includes a session ID, a flow information, a quality of service Qos parameter, a traffic descriptor, an ingress port name of the DRE, and a virtual local area network VLAN. ID, outgoing port name, and outgoing VLAN ID.
  • the first path is specified as the primary path, because the path has fewer DREs than the second one, the path is relatively short, and the second is the backup path.
  • the connection control layer sends the path selection message. On each DRE of the bearer capability layer, it is guaranteed that the service flow can have two paths for carrying. At this time, the traffic between UE1 and UE2 is carried only on the first path.
  • Step 13 Detecting a link failure, and switching the bearer path when the primary path fails
  • the first two DREs on the path periodically initiate end-to-end link detection messages, such as the two DREs of the two paths in Figure 2: DRE 1 and DRE6 need to periodically detect the access of the full path, is there a
  • DRE 1 and DRE6 need to periodically detect the access of the full path, is there a
  • the two DREs at the beginning and the end of the link can be automatically detected, and the link failure information is automatically notified to the surrounding DREs.
  • the primary path is faulty and the backup path is normal, the primary (first) path is switched to the backup (second) path. After the successful handover, the backup path becomes the primary path.
  • the primary path before the occurrence becomes the backup path.
  • the optimal backup path is selected according to the priority of the backup path to switch, that is, the backup path with the higher priority is selected for switching.
  • the first and last DREs are used to initiate the handover, which is transparent to the connection control layer, and the connection control layer does not interfere; if the primary path is normal and the backup path is faulty, only the failed backup path is recorded, and the bearer of the service is not switched; When determining the primary path failure, if there is no normal backup path, the leased line is removed.
  • the VSC specifies the primary path.
  • the primary backup relationship is absolute, but the primary path that is initially delivered by the VSC fails, and after switching to the backup path, this
  • the future primary path and backup path are relative, that is, the path of the current bearer service is the primary use, it may not be the shortest path, and the other backup path may be the shortest path.
  • the path switching process may be transparent to the connection control layer, and may not notify the connection control layer, but may also notify the connection control layer of an event, so that the connection control layer and the service control layer perform some policy adjustment.
  • the present invention implements the V-Switch fault recovery function, and selects more than two paths at the same time by using the connection control layer to be routed to the bearer capability layer, and the bearer capability layer selects the path priority level.
  • the high-priority path carries the bearer, and the bearer capability layer detects the link fault through the link detection technology. Once the link fault causes the primary path to fail, the service is switched to the backup path with the highest priority to continue the bearer.
  • the recovery speed of the leased line is reduced, the risk of service interruption of the leased line is reduced, and the fault recovery capability of the V-Switch private line service is improved.
  • the backup path technology is applicable to networks of any size, is easy to implement, and performs maintenance management.
  • the present invention also provides an apparatus for transmitting a service flow in a virtual switching system, comprising: a transmission path selection module connected to the control layer and a data forwarding entity DRE of the bearer capability layer.
  • the foregoing transmission path selection module is configured to select two or more equivalent transmission paths for the service flow, determine the primary path, and deliver the path selection message including the primary and secondary path information to the data forwarding entity DRE of the bearer layer.
  • the process of selecting the equivalent transmission path for the service flow is as follows: Connection The control layer preferentially selects the path with the different DRE sequence as the equivalent transmission path, and secondly selects the path with the same DRE sequence but different physical links as the equivalent transmission path.
  • the above DRE selects the primary path to transport the service flow.
  • the device of the present invention further includes: a link failure detecting module and a path switching module, wherein 001593
  • a link fault detection module configured to perform fault detection on the primary path and the backup path for performing service transmission in the virtual switching system; and when the primary path is determined to be faulty and the backup path is normal, the path switching module is notified to perform Switching operation; When it is determined that the active path is normal and the backup path is faulty, the bearer of the service is not switched, and only the faulty backup path is recorded.
  • the path switching module is configured to switch the service to the backup path according to the received handover notification.
  • the priority of the primary and secondary paths, the path switching process, and the like are completely the same as those of the previous method, and are not described here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Méthode et appareil améliorant la fiabilité de la transmission d’un système d’échange virtuel. Son élément clé se décrit comme suit : à la sélection d’un chemin de flux de service, la couche contrôlant la sélection sélectionne simultanément plus de deux chemins de transmission pour le flux de service et détermine le chemin primaire ; lorsque le chemin primaire est défectueux, la couche d’aptitude au transport peut automatiquement commuter le flux de service vers l’autre chemin, ce qui rétablit totalement le fonctionnement de la couche d’aptitude au transport du commutateur virtuel. L’invention diminue le risque d’interruption de service, améliore la fiabilité d’un service de ligne privé et augmente la stabilité de fonctionnement du réseau. L’invention s’applique aux réseaux de toute taille et en permet la réalisation, la maintenance et la gestion.
PCT/CN2006/001593 2005-07-15 2006-07-06 Méthode et appareil de transmission de flux de service sur un système d’échange virtuel Ceased WO2007009347A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNB2005100839667A CN100486216C (zh) 2005-07-15 2005-07-15 一种提高虚拟交换系统中传输可靠性的方法
CN200510083966.7 2005-07-15

Publications (1)

Publication Number Publication Date
WO2007009347A1 true WO2007009347A1 (fr) 2007-01-25

Family

ID=37609948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2006/001593 Ceased WO2007009347A1 (fr) 2005-07-15 2006-07-06 Méthode et appareil de transmission de flux de service sur un système d’échange virtuel

Country Status (2)

Country Link
CN (1) CN100486216C (fr)
WO (1) WO2007009347A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114268578A (zh) * 2021-12-16 2022-04-01 平安证券股份有限公司 切换线路的数据传输方法、装置、设备及存储介质
CN116545922A (zh) * 2023-07-05 2023-08-04 国网浙江省电力有限公司宁波供电公司 一种多通道通信方法与系统

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9276953B2 (en) 2011-05-13 2016-03-01 International Business Machines Corporation Method and apparatus to detect and block unauthorized MAC address by virtual machine aware network switches
US8670450B2 (en) 2011-05-13 2014-03-11 International Business Machines Corporation Efficient software-based private VLAN solution for distributed virtual switches
US8588224B2 (en) 2011-05-14 2013-11-19 International Business Machines Corporation Priority based flow control in a distributed fabric protocol (DFP) switching network architecture
US8837499B2 (en) 2011-05-14 2014-09-16 International Business Machines Corporation Distributed fabric protocol (DFP) switching network architecture
US20120287785A1 (en) 2011-05-14 2012-11-15 International Business Machines Corporation Data traffic handling in a distributed fabric protocol (dfp) switching network architecture
US20120291034A1 (en) 2011-05-14 2012-11-15 International Business Machines Corporation Techniques for executing threads in a computing environment
US9497073B2 (en) 2011-06-17 2016-11-15 International Business Machines Corporation Distributed link aggregation group (LAG) for a layer 2 fabric
US20130064066A1 (en) 2011-09-12 2013-03-14 International Business Machines Corporation Updating a switch software image in a distributed fabric protocol (dfp) switching network
US8767529B2 (en) 2011-09-12 2014-07-01 International Business Machines Corporation High availability distributed fabric protocol (DFP) switching network architecture
US8750129B2 (en) 2011-10-06 2014-06-10 International Business Machines Corporation Credit-based network congestion management
US9065745B2 (en) 2011-10-06 2015-06-23 International Business Machines Corporation Network traffic distribution
CN104283780B (zh) * 2014-09-26 2018-03-13 华为技术有限公司 建立数据传输路径的方法和装置
CN105991427B (zh) * 2015-01-27 2019-05-07 杭州迪普科技股份有限公司 备份路径确定及切换的方法和装置
CN105207877B (zh) * 2015-10-10 2018-10-09 中国人民解放军信息工程大学 一种虚拟网链路可靠数据传输方法
TWI587661B (zh) * 2015-11-26 2017-06-11 財團法人工業技術研究院 混合式軟體定義網路的虛擬區域網路復原方法、系統及其裝置
CN108243101B (zh) * 2016-12-23 2021-03-16 中国移动通信集团广东有限公司 数据传输系统及方法
CN110071843B (zh) * 2019-05-08 2021-11-26 浪潮云信息技术股份公司 一种基于流路径分析的故障定位方法及装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH098806A (ja) * 1995-06-22 1997-01-10 Fujitsu Ltd 迂回経路端選択方式
WO1998053575A1 (fr) * 1997-05-23 1998-11-26 Trustees Of The Stevens Institute Of Technology Reseau en mode de transfert asynchrone transparent non perturbable
US6311288B1 (en) * 1998-03-13 2001-10-30 Paradyne Corporation System and method for virtual circuit backup in a communication network
US20020030864A1 (en) * 2000-01-28 2002-03-14 Sid Chaudhuri Control of optical connections in an optical network
WO2003030462A2 (fr) * 2001-09-28 2003-04-10 Tropic Networks Inc. Reseau et systeme de communication a commutation par etiquette, et procede de retablissement du trajet
US6798740B1 (en) * 2000-03-13 2004-09-28 Nortel Networks Limited Method and apparatus for switch core health monitoring and redundancy
US20060029033A1 (en) * 2004-08-05 2006-02-09 Alcatel Method for forwarding traffic having a predetermined category of transmission service in a connectionless communications network

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH098806A (ja) * 1995-06-22 1997-01-10 Fujitsu Ltd 迂回経路端選択方式
WO1998053575A1 (fr) * 1997-05-23 1998-11-26 Trustees Of The Stevens Institute Of Technology Reseau en mode de transfert asynchrone transparent non perturbable
US6311288B1 (en) * 1998-03-13 2001-10-30 Paradyne Corporation System and method for virtual circuit backup in a communication network
US20020030864A1 (en) * 2000-01-28 2002-03-14 Sid Chaudhuri Control of optical connections in an optical network
US6798740B1 (en) * 2000-03-13 2004-09-28 Nortel Networks Limited Method and apparatus for switch core health monitoring and redundancy
WO2003030462A2 (fr) * 2001-09-28 2003-04-10 Tropic Networks Inc. Reseau et systeme de communication a commutation par etiquette, et procede de retablissement du trajet
US20060029033A1 (en) * 2004-08-05 2006-02-09 Alcatel Method for forwarding traffic having a predetermined category of transmission service in a connectionless communications network

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114268578A (zh) * 2021-12-16 2022-04-01 平安证券股份有限公司 切换线路的数据传输方法、装置、设备及存储介质
CN114268578B (zh) * 2021-12-16 2024-04-02 平安证券股份有限公司 切换线路的数据传输方法、装置、设备及存储介质
CN116545922A (zh) * 2023-07-05 2023-08-04 国网浙江省电力有限公司宁波供电公司 一种多通道通信方法与系统
CN116545922B (zh) * 2023-07-05 2023-12-05 国网浙江省电力有限公司宁波供电公司 一种多通道通信方法与系统

Also Published As

Publication number Publication date
CN100486216C (zh) 2009-05-06
CN1897567A (zh) 2007-01-17

Similar Documents

Publication Publication Date Title
EP2498454B1 (fr) Procédé, dispositif et système de traitement de trafic de service sur la base de pseudofils
WO2007009347A1 (fr) Méthode et appareil de transmission de flux de service sur un système d’échange virtuel
EP2852104B1 (fr) Procédé et dispositif pour établir un tunnel d'ingénierie de trafic de commutation multiprotocole par étiquette
US8320389B2 (en) Reliability processing methods and systems in the networking of metro ethernet network providing multi-service
WO2008151553A1 (fr) Procédé, dispositif et système pour protéger un trafic à diffusion multiple
CN101436945B (zh) 一种组播业务故障保护的方法、系统及装置
WO2007012239A1 (fr) Procédé permettant de commuter la prestation de services d'un lan privé virtuel et système y afférant
CN104620637A (zh) 用于标签交换网络中的移动性管理的方法和系统
TW201218687A (en) Network device with creating path data and method thereof
WO2009082978A1 (fr) Procédé de protection de réseau d'accès, système et nœud de bord d'accès
KR101688682B1 (ko) 빠른 ｌｓｐ 경보 메커니즘
WO2009082905A1 (fr) Procédé système et dispositif commutateur permettant l'établissement dynamique de réseau local virtuel de multidiffusion
CN101127637A (zh) 一种实现虚拟专用局域网服务网络备份链路的方法及系统
US20060268729A1 (en) Methods and apparatus for monitoring link integrity for signaling traffic over a path traversing hybrid ATM/Ethernet infrastructure in support of packet voice service provisioning
CN100417141C (zh) 一种组播业务实现方法
WO2010006524A1 (fr) Procédé de multidiffusion fiable, appareil et système fournisseur de couche supérieure
WO2007009337A1 (fr) Méthode d’implémentation de commutateur virtuel et appareil pour cela
EP1201061B1 (fr) Systeme et procede d'evitement de boucle dans une commutation par etiquette multiprotocole
CN1946040A (zh) 一种组播业务的保护方法和装置
CN1870575B (zh) 一种提高虚拟交换系统中传输可靠性的方法
EP2117199B1 (fr) Procédé, système et routeur de transmission basés sur le protocole de routage inter-domaine (bgp)
CN100579021C (zh) 虚交换中进行故障恢复的方法
JP4459767B2 (ja) 通信方法及び通信ノード
CN101217462A (zh) 虚交换中进行故障恢复的方法
CN100461753C (zh) 虚交换体系中的路径选择方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06761368

Country of ref document: EP

Kind code of ref document: A1