WO2007118429A1 - Procédé et appareil permettant de détecter un état de chemin d'indication de défaut arrière - Google Patents

Procédé et appareil permettant de détecter un état de chemin d'indication de défaut arrière Download PDF

Info

Publication number
WO2007118429A1
WO2007118429A1 PCT/CN2007/001243 CN2007001243W WO2007118429A1 WO 2007118429 A1 WO2007118429 A1 WO 2007118429A1 CN 2007001243 W CN2007001243 W CN 2007001243W WO 2007118429 A1 WO2007118429 A1 WO 2007118429A1
Authority
WO
WIPO (PCT)
Prior art keywords
path
connectivity
reverse
message
defect indication
Prior art date
Application number
PCT/CN2007/001243
Other languages
English (en)
Chinese (zh)
Inventor
Shuyou Dong
Wenyang Lei
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 WO2007118429A1 publication Critical patent/WO2007118429A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0677—Localisation of faults
    • 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
    • H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for detecting a state of a reverse defect indicating path. Background technique
  • LSP Label Switching Path
  • this MPLS OAM mechanism it is possible to effectively detect, confirm, and locate defects originating from the MPLS layer network; report defects and make corresponding processing; and provide a trigger mechanism for protection switching in the event of a failure.
  • OAM connectivity detection (CV-Connectivity Verification)
  • the LSP connectivity detection is performed by the ingress (source) transmission of the LSP and the reception (sink) of the LSP.
  • OAM FFD Fast Failure Detection
  • the connectivity detection is performed in the manner in which the ingress (source) of the LSP is transmitted and the egress (sink) is received.
  • the FFD packet has one byte of frequency information.
  • CV message collection The fixed Is transmission period is used, and the FFD message can support multiple transmission frequencies such as 10ms, 20ms, 50ms ⁇ 100ms, 200ms, 500ms, etc., and the supported frequency values can be changed according to requirements.
  • the OAM Forward Defect Indication (FDI) packet is used by the upstream node of the LSP to advertise the defect information to the egress node of the LSP.
  • FDI OAM Forward Defect Indication
  • OAM Backward Defect Indication (BDI) packet The OAM BDI packet is used by the outbound node of the LSP to notify the ingress of the LSP through the reverse channel after discovering the LSP defect.
  • the basic detection function of MPLS OAM is mainly the interaction process of connectivity detection. It can be described as follows:
  • MPLS OAM detects the connectivity of a single LSP.
  • the device sends a CV FFD packet to the source.
  • the packet is sent to the sink through the detected LSP.
  • the sink determines the type, frequency, and path of the LSP.
  • the TTSI Terminal Termination Source Identifier
  • the TTSI Terminal Termination Source Identifier
  • the number of correct and incorrect packets received during the detection period is calculated, so that the connectivity of the LSP is monitored at any time, and when the LSP is defective, it is quickly detected. Defects and analyze the type of defect.
  • the reverse channel carrying BDI may be of the following three types:
  • a dedicated reverse LSP The only reverse LSP corresponding to the forward LSP is relatively stable, but it may cause waste of resources.
  • a shared reverse LSP A number of forward LSPs share a reverse LSP. All the LSPs returning BDI packets pass through this reverse LSP. This method reduces resource waste. However, when multiple forward LSPs are simultaneously defective, this reverse LSP There may be congestion on it.
  • Non-MPLS return path This method may pose a security risk.
  • a malicious user may create a BDI packet to be sent to the source of the detected LSP, causing unnecessary Interrupted.
  • additional security confirmations should be configured for BDI messages.
  • the TTSI is configured for the OAM, so that the TTSI information of the detected LSP can be carried in the BDI packet, so as to verify the validity of the BDI packet.
  • the fault information of the MPLS OAM needs to be advertised in the manner shown.
  • the premise is that the path of the BDI message is unobstructed. If the BDI message cannot reach the source due to the path failure of the BDI, the entire fault detection mechanism fails. In the case of BDI path sharing, if the shared path fails, the fault detection of all forward LSPs will be invalidated. This situation is more serious.
  • the prior art employs a method of separately configuring the fault detection function for the BDI path. For example: If the BDI message is forwarded through the IP path, the BDI path is detected by detecting whether the normal IP path is normal. If the BDI message is transmitted through the MPLS LSP, the LSP needs to be detected.
  • the method is ordinary MPLS OAM detection.
  • Embodiments of the present invention provide a method and apparatus for detecting a BDI path state by a reverse defect.
  • Embodiments of the present invention provide a reverse defect indication path state detection method, where the method includes:
  • the transmitting end periodically sends a connectivity detection packet to the receiving end on the reverse defect indication path; the receiving end receives the connectivity detection packet, and when the timing of the receiving end arrives, the receiving end does not receive the packet.
  • the connectivity detection packet determines that the reverse defect indication path is faulty.
  • the embodiment of the invention provides a path state detecting device, which comprises a detecting message sending module.
  • the detection packet sending module is configured to periodically send a connectivity detection message to the corresponding receiving end on the reverse defect indication path.
  • the transmitting module includes a timer module and reverse defect indication path connectivity Detecting a transmitting submodule
  • the timer module is configured to set a timing duration for the reverse defect indication path
  • the reverse defect indication path connectivity detection sending submodule is configured to: when the timing duration of the reverse defect indication path arrives, A connectivity detection is generated, and the connectivity detection packet is sent through a corresponding reverse defect indication path.
  • the device further comprises a detection message receiving module,
  • the detection packet receiving module is configured to receive the connectivity detection packet, and if the predetermined timing duration of the receiving end arrives, the connectivity detection is not received, and the reverse defect is determined. Indicates that the path has failed.
  • Another path state detecting apparatus includes: detecting a message receiving module;
  • the detection packet receiving module is configured to receive the connectivity detection packet, and if the receiving terminal does not receive the connectivity detection packet when the timing of the receiving end arrives, determine the reverse The defect indicates that the path has failed.
  • the detection message receiving module comprises a sliding timer module and a reverse defect indicating path connectivity detecting receiving submodule;
  • the sliding timer module is configured to set a timing duration for the reverse defect indication path, where a timing duration of the receiving end is greater than a timing duration of the corresponding sending end;
  • the reverse defect indication path connectivity detection receiving submodule is configured to receive the connectivity test J1.
  • the message flow of the MPLS OAM fault detection is extended, and the path detection packet is periodically sent on the path of the BDI, and the receiving end is based on a certain time interval.
  • the number of received probe packets determines whether the BDI path is faulty. It is not necessary to separately configure the fault detection mechanism for the BDI path. Instead, the MPLS OAM mechanism is used to automatically detect the BDI path connectivity. Therefore, the workload of the tester is greatly reduced, the test procedure can be simplified, and the reliability and efficiency can be improved.
  • FIG 1 shows the basic process of MPLS OAM interaction detection
  • FIG. 2 is a device diagram of detecting a path state in an embodiment of the present invention
  • FIG. 3 is a flowchart of sending a reverse fault indication path detection message according to an embodiment of the present invention
  • FIG. 4 is a flowchart of receiving a message by using a reverse defect indication path in the embodiment of the present invention. detailed description
  • the message flow of the MPLS OAM fault detection is extended, and the path detection packet is periodically sent on the path of the BDI. If the receiving end does not receive the specified number of detection packets within a certain time interval, the BDI path is considered to be faulty. .
  • a reverse defect indication path state detecting device includes: a detecting message sending module or/and a detecting message receiving module;
  • the detecting message sending module is configured to send, by the sending end of the reverse defect indicating path, a connectivity detecting message to the receiving end of the reverse defect indicating path on the reverse defect indicating path; the detecting message receiving module, The receiving end receives the connectivity detection packet, and if the receiving end still does not receive the connectivity detection packet when the timing of the receiving end arrives, the reverse defect indication path is considered to appear. malfunction.
  • the detection message sending module includes a reverse defect indication (BDI) processing module and a timer module, and the BDI processing module has a BDI CV (BDI Connectivity Verification) transmission sub-module;
  • BDI reverse defect indication
  • CV BDI Connectivity Verification
  • the timer module is configured to set a timing duration for the reverse defect indication path
  • the reverse defect indication path connectivity detection sending submodule is configured to generate when the timing duration of the reverse defect indication path arrives A connectivity detection packet is sent, and the connectivity detection packet is sent by the reverse defect indication path corresponding to the timing duration.
  • the detection message receiving module includes a sliding timer module and a reverse defect indication path connectivity detection BDI CV receiving submodule;
  • the sliding timer module is configured to set a timing time for the reverse defect indication path The timing of the receiving end is greater than the corresponding timing of the sending end; the reverse defect indicating path connectivity detecting and receiving submodule is configured to receive the connectivity detecting message.
  • the process of sending a reverse defect indication path detection packet in the embodiment of the present invention includes the following steps:
  • Step 101 Set a timing duration for the reverse defect indication path at the sending end, and the timer module stores timing information of all LSPs that have enabled BDI path detection, and can set different timing durations for BDI detection paths corresponding to different LSPs. . Since the connectivity check of the BDI path is a non-real-time tight detection, the duration of the timing can be relatively long.
  • Step 102 When the timing duration arrives, a connectivity detection message is generated.
  • a timer interrupt message is generated, and the message includes the information of the LSP.
  • the reverse defect indicates the path connectivity detection.
  • the BDI CV sending sub-module extracts the information of the LSP. Construct reverse defect indication path connectivity detection BDI CV detection message.
  • the BDI CV detection packet can be used in two ways:
  • BDI-CV Define a new message type called BDI-CV with the message format as follows:
  • Action type can indicate two actions, namely BDI-CV detection and BDI-CV stop detection
  • TTSI LSP ID, if TTSI is not required, this field is padded with 0x00
  • the message format is as follows:
  • the type field indicates the action type, and the valid value is 0x01, which indicates the BDI CV detection message. If the value of type is 0, it means that it is a normal BDI failure notification message.
  • Step 103 The connectivity detection message BDI CV is sent by the reverse defect indication path corresponding to the timing duration.
  • Step 201 Set a timing duration for each reverse defect indication path at the receiving end, and the timing duration is greater than the timing duration of the corresponding sending end. , the duration can be 3 times the transmission period of the text;
  • Step 202 Start a sliding timer to determine whether the BDI CV detection message is received.
  • the detection of the reverse defect message is performed by using a sliding window at the receiving end of the reverse defect indication path;
  • Step 203 If the defect detection message is received within the specified timing of the receiving end, the sliding timer is reset.
  • Step 204 When the timing value of the timer arrives, the BDI CV receiving submodule still does not receive the connectivity detection packet, and the reverse defect indication path is considered to be faulty.

Landscapes

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

Abstract

L'invention concerne un procédé et un appareil permettant de détecter l'état d'un chemin d'indication de défaut arrière. Le procédé de l'invention comprend les étapes suivantes : un message de connectivité est envoyé à un récepteur dans un chemin d'indication de défaut arrière en fonction de l'intervalle temporel programmé; ledit récepteur reçoit le message de connectivité; lorsque le compteur du récepteur arrive à expiration, si le récepteur n'a pas reçu le message de connectivité, une panne s'est produite dans le chemin d'indication de défaut arrière. L'invention concerne également un appareil qui permet de détecter un chemin d'indication de défaut arrière. Ledit appareil comprend les modules d'envoi et de réception pour la détection du message. Le procédé de l'invention permet de ne pas configurer de mécanisme de détection de défaut uniquement pour un chemin BDI, et fait intervenir un mécanisme MPLS OAM directement pour mettre en oeuvre la détection de connectivité pour un chemin BDI.
PCT/CN2007/001243 2006-04-18 2007-04-16 Procédé et appareil permettant de détecter un état de chemin d'indication de défaut arrière WO2007118429A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2006100756423A CN1852183A (zh) 2006-04-18 2006-04-18 一种反向缺陷指示路径状态检测的方法及装置
CN200610075642.3 2006-04-18

Publications (1)

Publication Number Publication Date
WO2007118429A1 true WO2007118429A1 (fr) 2007-10-25

Family

ID=37133653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/001243 WO2007118429A1 (fr) 2006-04-18 2007-04-16 Procédé et appareil permettant de détecter un état de chemin d'indication de défaut arrière

Country Status (2)

Country Link
CN (1) CN1852183A (fr)
WO (1) WO2007118429A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105262686A (zh) * 2014-07-18 2016-01-20 中兴通讯股份有限公司 一种网络连通性验证方法和装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101330442B (zh) * 2007-06-20 2010-12-08 中兴通讯股份有限公司 基于共享反向路径的缺陷指示信息传递方法
CN101197731B (zh) * 2007-12-12 2012-02-01 华为技术有限公司 路径故障检测的方法、***及装置
CN104780095A (zh) * 2015-04-30 2015-07-15 杭州华三通信技术有限公司 一种sdn网络中的路径探测方法和装置
CN110650062A (zh) * 2018-06-26 2020-01-03 中国电信股份有限公司 链路性能检测方法、***、装置和计算机可读存储介质
CN113489626B (zh) * 2021-09-06 2021-12-28 网络通信与安全紫金山实验室 路径故障检测及通告的方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1320219A2 (fr) * 2001-12-17 2003-06-18 Alcatel Canada Inc. Appareil et procédé pour la transmission de paquets de OAM entre des réseaux ATM et des réseaux de commutation en cas d' erreurs
EP1324568A2 (fr) * 2001-12-17 2003-07-02 Alcatel Canada Inc. Système et méthode pour la détection de défaillances et re-routage des liens dans un réseau de communication
US20040133368A1 (en) * 2002-10-24 2004-07-08 Tellabs Oy Method, system, and network entity for detecting a connection fault

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1320219A2 (fr) * 2001-12-17 2003-06-18 Alcatel Canada Inc. Appareil et procédé pour la transmission de paquets de OAM entre des réseaux ATM et des réseaux de commutation en cas d' erreurs
EP1324568A2 (fr) * 2001-12-17 2003-07-02 Alcatel Canada Inc. Système et méthode pour la détection de défaillances et re-routage des liens dans un réseau de communication
US20040133368A1 (en) * 2002-10-24 2004-07-08 Tellabs Oy Method, system, and network entity for detecting a connection fault

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105262686A (zh) * 2014-07-18 2016-01-20 中兴通讯股份有限公司 一种网络连通性验证方法和装置
CN105262686B (zh) * 2014-07-18 2020-04-24 中兴通讯股份有限公司 一种网络连通性验证方法和装置

Also Published As

Publication number Publication date
CN1852183A (zh) 2006-10-25

Similar Documents

Publication Publication Date Title
Busi et al. Operations, administration, and maintenance framework for MPLS-based transport networks
US8879384B2 (en) Fast upstream source failure detection
EP2395702B1 (fr) Procédé et dispositif de traitement de défaillance
US8521896B2 (en) Method and system for negotiating the bidirectional forwarding detection session discriminator of pseudo wire
US8953456B2 (en) Ethernet OAM performance management
US20090037713A1 (en) Operation, administration and maintenance (oam) for chains of services
US20050099954A1 (en) Ethernet OAM network topography discovery
US20050099949A1 (en) Ethernet OAM domains and ethernet OAM frame format
US20050099951A1 (en) Ethernet OAM fault detection and verification
EP2852098B1 (fr) Procédé, noeud et système de détection des performances d'un réseau privé virtuel de niveau trois
WO2013097459A1 (fr) Procédé et dispositif de détection de chemin de service
WO2007056929A1 (fr) Procede et appareil pour mettre en oeuvre la protection de groupes au sein d'un reseau mpls
WO2007118429A1 (fr) Procédé et appareil permettant de détecter un état de chemin d'indication de défaut arrière
WO2007045156A1 (fr) Procede et systeme de controle de la verification de continuite des liaisons ethernet et terminal de maintenance de ceux-ci
WO2008148334A1 (fr) Procédé, système et appareil pour détecter la réception anormale d'un message
US10116545B2 (en) Method, device and system for processing OAM packet
WO2012155817A1 (fr) Procédé, dispositif et système d'essai de bouclage
WO2007082429A1 (fr) Procédés et dispositifs de détermination de l'état de connexion d'un pseudo-câble et de notification de l'état de connexion d'un circuit annexe
WO2011015011A1 (fr) Procédé et système de détection et de localisation défaillances sur un réseau en boucle
US20140086040A1 (en) Network system, transmission device, and fault information delivery method
TW200901677A (en) Data driven connection fault management (DDCFM) in CFM maintenance points
WO2015120720A1 (fr) Procédé et système de traitement d'échec de dégradation de signal
EP2129042B1 (fr) Système de réseau multidiffusion, noeud et procédé de détection de défaut dans un lien de réseau multidiffusion
WO2014146541A1 (fr) Système de convergence de cdn et de réseau, procédé de sélection de module de planification et support de stockage informatique
US20080267080A1 (en) Fault Verification for an Unpaired Unidirectional Switched-Path

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07720816

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07720816

Country of ref document: EP

Kind code of ref document: A1