WO2011131069A1 - Procédé de détection de liaisons d'association et dispositif distribué - Google Patents

Procédé de détection de liaisons d'association et dispositif distribué Download PDF

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Publication number
WO2011131069A1
WO2011131069A1 PCT/CN2011/072010 CN2011072010W WO2011131069A1 WO 2011131069 A1 WO2011131069 A1 WO 2011131069A1 CN 2011072010 W CN2011072010 W CN 2011072010W WO 2011131069 A1 WO2011131069 A1 WO 2011131069A1
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WO
WIPO (PCT)
Prior art keywords
link
abnormal
status
end device
line card
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/CN2011/072010
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English (en)
Chinese (zh)
Inventor
韦红波
张磊
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ZTE Corp
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ZTE Corp
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • 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, and in particular to a method for detecting a bundled link and a distributed device. Background technique
  • T-MPLSC transport MPLS Multi-Protocol Label Switching
  • T-MPLS connection-oriented packet transport technology.
  • T-MPLS provides a simplified, connection-oriented implementation based on widely used IP/MPLS technologies and standards. T-MPLS removes the functionality of MPLS that is not related to connection-oriented applications, while adding some features that are important to the transport network. Unlike MPLS, T-MPLS does not support connectionless mode, which is simpler to implement and easier to operate and manage than MPLS. T-MPLS eliminates the functional features associated with L3 and IP routing in MPLS, and its device implementation will meet operators' needs for low-cost and high-capacity next-generation packet networks. T-MPLS follows the existing idea of circuit-switched transport networks, using the same architecture, management and operational modes. T-MPLS will be used in the transport network for future operator packetization.
  • T-MPLS can be considered as an organic combination of mature TDM transport network operation mechanism and reliable packet network technology (MPLS).
  • MPLS packet network technology
  • T-MPLS has major improvements to MPLS, such as bidirectional LSP (Label Switching Path), end-to-end LSP protection, and powerful OAM (Operation Administration and Maintenance) mechanisms.
  • LSP Label Switching Path
  • OAM Operaation Administration and Maintenance
  • the connectivity detection (CC) function is defined in T-MPLS.
  • the essence of the bundling technology is to "combine" several physical links between two devices into one logical data path, called a bundle link.
  • the link is logically a whole.
  • the internal composition and details of the transmitted data are transparent to the upper layer.
  • Several physical links inside the bundle link complete the data transmission and reception tasks and back up each other. As long as there are still working members, the entire bundled link will not expire.
  • Bundling links have the following significant advantages over direct connections through physical ports between devices as shown in Figure 1:
  • bundling is even the only way to increase link capacity.
  • devices on the market cannot provide links higher than 10G
  • users can aggregate two 10G links to obtain transmission lines with bandwidths greater than 10G.
  • it is necessary to limit the capacity of the transmission line which is neither too low, affecting the transmission speed, nor too high, exceeding the processing capacity of the network.
  • the prior art only supports link bandwidth growth of orders of magnitude, such as 10M, 100M, 1000M, and the like.
  • a primary object of the present invention is to provide a method for detecting a bundled link and a distributed device to solve at least the above problems.
  • a method for detecting a bundle link including: a sender device sends a connectivity detection CC message to a receiver device through all member links in a bundle link; When the CC message of any member link is not received within the predetermined time, the status of the member link is abnormal.
  • a distributed device including a line card, where the line card includes: a receiving module, configured to receive a connectivity detection CC report sent by the sending end device through all member links in the bundle link
  • the member link state judging module is configured to determine that the status of the member link is abnormal when the CC message of any member link is not received within a predetermined time; If the status is abnormal, it is determined that the status of the bundled link is abnormal.
  • the receiving end device detects the CC message sent by the transmitting end device through all the member links of the bundling link, and determines the member link when the CC message on a certain member link is not received within a predetermined time.
  • the status of the link is abnormal.
  • the status of the bundle link is considered abnormal.
  • FIG. 1 is a schematic diagram of a device directly connected through a physical port according to the related art
  • FIG. 2 is a schematic diagram of a device connected through a bundle interface according to the related art
  • FIG. 3 is a T-MPLS according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for detecting a bundle link according to a first embodiment of the present invention
  • FIG. 5 is a bundle link of a distributed device according to Embodiment 2 of the present invention.
  • Flowchart of connectivity detection 6 is a schematic diagram of connection of a bundle interface between a router and an access network router and a switch according to a third embodiment of the present invention;
  • FIG. 7 is a schematic structural diagram of a distributed device according to an embodiment of the present invention.
  • Step S402 A sender device sends a connectivity detection CC 4 to a receiver device through all member links in a bundle link.
  • Step S404 when the receiving device does not receive the CC message of any member link within a predetermined time, it determines that the status of the member link is abnormal; and in step S406, the receiving device determines all member chains. When the status of the path is abnormal, it is determined that the status of the bundle link is abnormal.
  • the receiving end device detects the CC message sent by the sending end device through all the member links of the bundling link, and determines the member when the CC message on a certain member link is not received within a predetermined time.
  • the status of the link is abnormal (that is, an abnormality or fault occurs).
  • the status of all the member links is abnormal, the status of the link is considered abnormal (that is, an abnormality or fault occurs).
  • the CC function of the distributed device can only support one physical port to send protocol packets. That is, the connectivity of the physical link directly connected to the physical port can be detected. . Can be implemented using this embodiment
  • step S402 includes: the sending end device sends a CC message by using a line card where all member links of the sending end device are located.
  • the sender device master notifies all the line cards where the member ports of the bundle link are located (eg, periodically) to simultaneously transmit the CC 4 message.
  • This embodiment provides a specific implementation manner in which a sending end device sends a CC message.
  • the step S404 includes: the receiving end device receives the CC message by using the line card where any member link of the receiving end device is located, and simultaneously detects the receiving condition; the receiving end device does not receive the CC message within the predetermined time.
  • the status of the member link is determined to be abnormal.
  • This embodiment provides a specific implementation manner in which the receiving end device detects the status of the member link.
  • the line card directly detects the reception of the CC message and makes a judgment, and the judgment is faster.
  • the method further includes: deleting, by the line cards where the member links are located, the states of the corresponding member links.
  • the mutual backup of the status of the member links of the bundled link that is, the full backup
  • the status of the member link is abnormal, and the line card of the other member link is notified.
  • the mutual backup of the status of the member link can also prevent the connectivity detection of the bundle link from being affected by the insertion and removal of the line card corresponding to the link of the member link.
  • the step S406 includes: when the receiving end device does not receive the CC message within the predetermined time by the line card where the member link of the receiving end device is located, the line card on the receiving end device determines whether the line card is normal. The member link; if there is no normal member link, the line card on the receiving device notifies the main control module in the receiving device, and the status of the bundling link is abnormal.
  • the link bundle link is abnormal. At this time, the bundle link cannot transmit packets.
  • the receiving device determines that there is a normal member link, it determines that the state of the bundled link is normal. That is, as long as the status of one member link is normal and the status of the entire bundle link is normal, the packet can be transmitted.
  • the preferred embodiment provides a specific implementation manner in which the receiving end device determines that the state of the bundled link is abnormal (that is, the bundle link is abnormal or faulty).
  • the line card can directly determine whether the status of the other member links is abnormal. If yes, it determines that the bundle link is abnormal.
  • the judgment of the state of the bundled link directly by the line card can greatly shorten the judgment time, determine the speed faster, and meet the requirements of the related technology for high reliability requirements (such as voice service, etc.).
  • the method includes: if a normal member link exists, the line card where the abnormal member link on the receiving device is located is connected to the member link of the receiving device except the abnormal member link.
  • the line card broadcasts a message that the status of its corresponding member link is abnormal.
  • the preferred embodiment provides a specific implementation in which the receiving end device determines that the state of the bundled link is normal. Because the line cards back up the state of the member links corresponding to each other, that is, each line card has the status of all member links. Therefore, when a line card determines the status of the member link corresponding to it If the fault is abnormal, the line card can directly determine whether the status of the other member links is abnormal. If not, determine that the status of the bundle link is normal. The judgment of the state of the bundled link directly by the line card can greatly shorten the judgment time, determine the speed faster, and meet the requirements of the related technology for high reliability requirements (such as voice service, etc.).
  • the transmission data can be directly switched, so that the transmission of data is not interrupted.
  • the distributed device A and the distributed device B can be the transmitting end and the receiving end of each other, and the connectivity detection of the bundled link 1 and the bundled link 2 is performed by the above method.
  • the method for detecting the bundle link of the present invention is described by taking the distributed device A in FIG. 3 as the router A and the distributed device B as the router B as an example. Traffic between the router A and the router B is carried. To prevent the loss of long-term traffic due to the interruption of the physical link, the traffic is carried over the bundle interface between the router A and the router B.
  • FIG. 5 is a flowchart of connectivity detection of a bundle link of a distributed device according to Embodiment 2 of the present invention. First, you need to create and configure bundled link 1 and bundle link 2 on Router A and Router B.
  • the physical interface of the BFD is bound to the corresponding bundle interface (that is, the physical link is added to the corresponding bundle link;) Then deploy the CC function of the T-MPLS OAM (that is, start the CC detection function of the bundle link) to detect the bundle link 1 and the bundle link 2 respectively! state. As shown in FIG.
  • the process of the method for detecting a bundle link specifically includes the following steps: Step S502: Configure a CC detection function for starting T-MPLS OAM on Router A and/or Router B; Step S504, The master notifies the CC function parameter of the line card where the member ports corresponding to all the member links of the bundle link 1 and the bundle link 2 are located, and the line card simultaneously sends the CC message according to the CC function parameter and starts detecting at the same time; S506: If the line card corresponding to one of the link links 1 or the link 2 of the bundle link 2 does not receive the CC message of the peer end within the detection time (that is, the predetermined time), a physical port chain is generated.
  • Step S508 The physical port link abnormal event needs to be separately processed according to the detection status of the sibling member link, and the line card determines whether the bundle link to which it belongs (assumed to be the bundle link 1) is detected.
  • the status is normal other sibling member links, and if yes, go to step S510, if no, go to step 4 to gather S512;
  • step S510 the line card broadcasts that the bundle link 1 corresponds to Line card detection state of this link member (i.e., the state of the line card corresponding to the members of the link is abnormal message);
  • step S512 the notification directly to the line card of the master device 1 as a whole bundle link is abnormal.
  • FIG. 6 is a schematic diagram of connection of a bundle interface between a router and an inter-network router and a switch according to a third embodiment of the present invention.
  • An operator deploys a bundled interface between the skeletal network and the access network to carry the service on the 7-port (that is, the bundled link is used to carry the service).
  • the bundled link needs to be detected by the CC function of the T-MPLS OAM.
  • Router A, Router B, and Router C form the backbone network of the carrier.
  • Switch A and Switch B are access-side devices. Configure the bundle interface and bundle link between Switch A and Router A.
  • Step 1 switches and routers A configuration bundle interface A 1, ⁇ 1 and the physical interface bundle into a bundle interface (i.e. links are created and configured on the bundle switch router A 1 and A (i.e., bundled
  • the binding link corresponding to interface 1 adds the physical link (that is, the physical link corresponding to the physical interface) to the corresponding bundle link 1;);
  • Step 2 configure bundle interface 1 to start T-MPLS.
  • the CC function of the OAM is used to detect the state of the bundled link 1.
  • Step 3 At some point, if the bundle link is detected according to the above detection method of the bundled link
  • FIG. 7 is a schematic structural diagram of a distributed device according to an embodiment of the present invention. As shown in FIG.
  • the distributed device 1 includes: a line card 10, comprising: a receiving module 101, configured to receive a connectivity detection CC message sent by a sending end device through all member links in a bundle link;
  • the link state determining module 102 is configured to determine that the status of the member link is abnormal when the receiving module 101 does not receive the CC message of any member link within a predetermined time; When the status of the path is abnormal, it is determined that the status of the bundled link is abnormal.
  • the line card 10 further includes: a sending module 103, configured to notify the main control module 20 that the state of the bundling link is abnormal when the member link state determining module 102 determines that the status of all the member links is abnormal;
  • the distributed device 1 further includes: a main control module 20 configured to receive a notification that the bundle link status of the line card 10 is abnormal, and perform subsequent processing.
  • the member link state determining module 102 is further configured to determine whether there is a normal member link when the receiving module 101 does not receive the CC message within a predetermined time.
  • the sending module 103 is further configured to: when the member link state determining module 102 determines that there is a normal member link, broadcast the corresponding line card to the distributed device 1 except the member link other than the abnormal member link.
  • the status of the member link is an abnormal message.
  • the distributed device of the above embodiment detects the connectivity of the bundle link by using the above-described detection method of the bundle link. It can be seen from the above description that the present invention achieves the following technical effects:
  • the present invention solves the problem that the related art cannot implement connectivity detection for a bundled link, thereby enabling inter-distributed devices in a T-MPLS network.
  • the connectivity of the bundle link is detected.
  • the status of the member links of the bundle link is backed up by each other and is not affected by the insertion and removal of the line card corresponding to the member link in the bundle link.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Un procédé permettant de détecter des liaisons d'association et un dispositif distribué sont décrits dans l'invention, dans lequel le procédé de détection inclut les étapes suivantes : un dispositif d'extrémité de transmission envoie des messages de contrôle de connectivité (CC) à un dispositif d'extrémité de réception par l'intermédiaire de toutes les liaisons membres d'une liaison d'association (S402) ; si le dispositif d'extrémité de réception ne reçoit pas le message CC par l'intermédiaire de l'une des liaisons membres dans un temps prédéterminé, l'état de la liaison membre est déterminé comme étant anormal (S404) ; et lorsque le dispositif d'extrémité de réception détermine que les états de toutes les liaisons membres sont anormaux, l'état de la liaison d'association est jugé comme étant anormal (S406). L'invention peut réaliser la détection de connectivité de liaisons d'association entre les dispositifs distribués dans un réseau de Transport MPLS (Transport Multi-Protocol Label Switching).
PCT/CN2011/072010 2010-04-21 2011-03-21 Procédé de détection de liaisons d'association et dispositif distribué Ceased WO2011131069A1 (fr)

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CN201010153776.9 2010-04-21
CN201010153776A CN101834759A (zh) 2010-04-21 2010-04-21 捆绑链路的检测方法及分布式设备

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CN101834759A (zh) * 2010-04-21 2010-09-15 中兴通讯股份有限公司 捆绑链路的检测方法及分布式设备
CN101984573B (zh) * 2010-11-15 2015-07-22 中兴通讯股份有限公司 分布式实现lacp标准状态机的方法及系统
CN102299846B (zh) * 2011-08-19 2014-09-10 杭州华三通信技术有限公司 一种bfd报文传输方法和设备
CN105791108B (zh) * 2014-12-25 2019-07-12 中兴通讯股份有限公司 一种基于捆绑接口的隧道带宽预留的方法及装置
CN106230956A (zh) * 2016-08-08 2016-12-14 镇江惠通电子有限公司 基于p2p的网络通讯方法及装置
CN108494677B (zh) * 2018-03-26 2021-03-30 新华三技术有限公司 链路的捆绑方法及装置
CN112751724B (zh) * 2019-10-31 2023-07-11 华为技术有限公司 检测链路状态的方法及装置
CN117041137A (zh) * 2023-07-31 2023-11-10 中国电信股份有限公司技术创新中心 链路状态检测方法、装置、设备、存储介质和程序产品

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