WO2011026319A1 - Procédé de protection de réseau en anneau en fonction de détection de défaillance locale et système correspondant - Google Patents

Procédé de protection de réseau en anneau en fonction de détection de défaillance locale et système correspondant Download PDF

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Publication number
WO2011026319A1
WO2011026319A1 PCT/CN2010/070773 CN2010070773W WO2011026319A1 WO 2011026319 A1 WO2011026319 A1 WO 2011026319A1 CN 2010070773 W CN2010070773 W CN 2010070773W WO 2011026319 A1 WO2011026319 A1 WO 2011026319A1
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WO
WIPO (PCT)
Prior art keywords
service
path
node
fault
ring network
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Application number
PCT/CN2010/070773
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English (en)
Chinese (zh)
Inventor
刘国满
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011026319A1 publication Critical patent/WO2011026319A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration

Definitions

  • the present invention relates to the field of ring network protection, and more particularly to a ring network protection method and system based on local fault detection.
  • BACKGROUND When a link between a node on a ring network and/or a neighboring node fails, part of the traffic transmitted on the ring network may not reach the destination node, resulting in packet loss.
  • the related art provides a method for protecting the service on the ring network, that is, the Steering protection method on the G.8132 T-MPLS ring network protection standard, and the method mainly includes the following steps:
  • a faulty packet is generated by the node that detects the fault and sent to other nodes on the ring network.
  • the ring network node determines whether the service sent by the node is affected by the fault. If yes, the node switches the service to the protection path for transmission. Otherwise, it still sends the service path. The business;
  • the receiving node of each service receives the service correspondingly on the protection path; in the case where the result of the determination in step 3 is no, the receiving node of each service is correspondingly Receive business on the work path.
  • the method has the following advantages: the protection path is relatively short, and the overhead and delay are small.
  • the present invention proposes a ring network protection method based on local fault detection, which includes the following steps: When a local fault occurs, a fault packet is generated, and the fault packet is sent to other nodes on the ring network.
  • the source node After receiving the fault packet, the source node sends the service through the working path and the protection path, where the working path and the protection path are The forwarding direction is reversed along the ring; the sink node receives the service via the working path or the protection path.
  • the method further includes: configuring a working path and a protection path for each service on the ring network; Local neighbors on the ring network perform local fault detection.
  • the method further includes: when the received direction changes, the sink node feeds back the received path information message to the source node.
  • the source node When the receiving path information packet sent by all the sink nodes indicates that the service is received from the working path, the source node only selects the working path to send the service; when all the receiving path information packets sent by the sink node indicate that the service is received from the protection path The source node only selects the protection path to send the service. The source node selects the working path and the protection path to send the service when the receiving path information message sent by the sink node indicates that the service is received on the working path and the service is received on the protection path. After receiving the fault packet, the source node determines whether the fault indicated by the fault packet affects the transmission of the service. If the judgment result is yes, the source node sends the service through the working path and the protection path.
  • the source node sends the service via the working path.
  • the node on the ring network receives the information that the fault disappears, the source node selects the working path to transmit, and the sink node selects the working path to receive.
  • the fault packet and the receiving path information packet are sent through the control channel or the data channel.
  • the service is at least one of a P2P service or a P2MP service.
  • the present invention also proposes a ring network protection system based on local fault detection, including a ring.
  • the network, the multiple nodes on the ring network, and the link between each two nodes further include: a fault packet generation module, which is set in each node of the ring network, and is used to generate a fault when detecting a local failure.
  • the fault message is sent to the node other than the node where the current fault packet generation module is located on the ring network; the two-way sending module is configured to enable the source node to send the service via the working path and the protection path, where The working path and the protection path are opposite to each other in a ring forwarding direction; and a one-way receiving module is configured to enable the sink node to receive the service via the working path or the protection path.
  • the service is at least one of a P2P service or a P2MP service.
  • FIG. 1 is a schematic diagram of service forwarding in a normal state
  • FIG. 2 is a schematic diagram of dual service transmission in a fault state
  • FIG. 3 is a schematic diagram of service selective dual-issue in a fault state
  • FIG. 4 is a data loop based on local fault detection. Schematic diagram of the network service protection process.
  • the ring network protection method based on the local fault detection of the present invention mainly includes the following steps: Step 1: When a node detects a local fault, generates a fault packet, and sends the fault message to the ring network to generate the fault.
  • Step 2 after receiving the fault message, the source node sends the industry via the working path and the protection path The working path and the protection path are opposite to each other in the direction of the ring forwarding.
  • Step 3 The sink node receives the service via the working path or the protection path.
  • the method further includes: Step 4: When the direction received by the sink node changes, the sink node feeds back the path information packet to the source node. Specifically, when the receiving path information packet sent by all the sink nodes indicates that the service is received from the working path, the source node only selects the working path to send the service; when the receiving path information packet sent by all the neighboring nodes indicates that the service is received from the protection path When the source node selects only the protection path to send the service. When the receiving path information message sent by the sink node indicates that the service is received on the working path and the service is received on the protection path, the source node selects the working path and the protection path to send the service.
  • the source node selects the working path to transmit, and the sink node selects the working path to receive. In the above manner, it is ensured that when the working path returns to normal, the original single-issue mode is returned, thereby keeping the bandwidth overhead within a small range.
  • the source node determines whether the fault indicated by the fault message affects the transmission of the service. If the determination result is yes, the source node sends the service via the working path and the protection path. If the judgment result is no, the source node transmits the service via the working path.
  • FIG. 4 is a schematic diagram of a data ring network service protection process based on local fault detection. As shown in FIG. 4, for the ring network structure shown in FIG. 1, the main process for implementing protection is as follows:
  • the opposite working path and protection path are established for each service on the ring network. And under normal circumstances, the sending end node of each service only sends traffic from the working path, and the service receiving node also selects to select the service from the working path direction, and passes local fault detection on each adjacent node on the ring network. Packets are constantly detected for link and node failures; 2. When the local link or node status is detected by the local fault packet, as shown in Figure 2, a faulty node is generated, and a fault message is generated and sent to the control channel or data channel. Other nodes on the ring network;
  • each node on the ring network After receiving the faulty packet, each node on the ring network performs packet analysis. If the node has a service to be sent on the ring, the service is first sent from the working path and the protection path. For each receiving node on the ring, one of the paths is selected to receive the service. Specifically, before the dual transmission, the packet may be determined to be a fault switching request. If yes, the service is from the working path and the protection path. On the dual-issue, each receiving node on the ring selects one of the paths to receive the service. Otherwise, the working path is selected to send the service, and each receiving node on the ring selects the working path to receive the service;
  • the receiving node of each service detects a change in the receiving path, generates a receiving path information message, feeds back the receiving state change, and sends it to the sending node of the service; and the sending node selects a path according to the receiving status of each receiving node. Send or keep two paths sent at the same time, as shown in Figure 3;
  • 102-101-108 and 102-103-104-105-106-107-108 transmit on two paths; and for the receiving node 108, select one path for reception, as shown in Figure 2 , then choose to receive traffic from the direction of 102-101-108; and for the P2MP service from 103 nodes to 105 and 107 nodes, separate 'J from 103-104-105-106-107 and
  • 103-102-101-108-107-106-105 send the traffic in two path directions, and select a path direction for receiving nodes 105 and 107 to receive the service;
  • the receiving node of each service such as: the receiving node 108 of the P2P service initiated by the 102 node, the receiving node 105 and 107 of the P2MP service initiated by the node 103; since the transmission and reception paths of the 108 and 107 nodes change, it is necessary to
  • the transmitting end nodes 102 and 103 of the service send the receiving path information, and the service sending node determines whether to select one path to send or two according to whether all receiving nodes are in the same path (all nodes are received from the working path or from the protection path).
  • the path (working path and protection path) simultaneously sends service packets;
  • the 105 or 106 node detects the fault ⁇ ! If the large-scale change occurs, a switch-recovery request message is regenerated, and then sent to other nodes on the ring through the control channel or data channel.
  • the original message will be
  • the service sent from the two path directions or sent only on the protection path is re-selected to be sent from one direction of the working path; for example, the P2P service from 102 nodes to 108 nodes is reselected from 102-103-104-105- 106-107-108 path to send traffic; and for the receiving node 108, re-select the working path direction receiving service; and for the P2MP service sent by the 103 node to the 105 and 107 nodes, the two directions are also stopped. For the transmission of the service, only the service is sent in the direction of the working path of 103-104-105-106-107, and the receiving nodes 105 and 107 are restored to the original working path direction to receive the service; status.
  • the other nodes on the ring After receiving the fault request message sent by the 105 or 106 node from the control channel or the data channel, the other nodes on the ring determine whether the current service transmission is affected by the fault. If the judgment result is yes, then The service sent by the ring itself is sent from the working path and the protection path. If the result of the determination is no, the service is kept on the working path.
  • the service is affected by the fault, respectively
  • the transmission is performed on two paths from 102-101-108 and 102-103-104-105-106-107-108; and for the receiving node 108, one path is selected for reception, as shown in Figure 2
  • the service is selected from the direction of 102-101-108; for the P2MP service of the 103-node to the 105-node in this example, since the working path 103-104-105 does not pass the failed link, it does not constitute The impact on the traffic transmission, thus keeping the traffic on the working path 103-104-105, the receiving node 105 receiving the service from the working path; for the P2MP service of the 103 node to the 107 node in this example, due to The working path 103-104-105-106-107 passes through the failed link
  • the receiving node of each service such as: the receiving node 108 of the P2P service initiated by the 102 node, the receiving node 105 and 107 of the P2MP service initiated by the node 103; since the transmission and reception paths of the 108 and 107 nodes change, it is necessary to
  • the transmitting end nodes 102 and 103 of the service send the receiving path information, and the service sending node determines whether to select one path to send or two according to whether all receiving nodes are in the same path (all nodes are received from the working path or from the protection path).
  • the path (working path and protection path) simultaneously sends service packets; 5.
  • the switch When the fault on the ring network disappears, that is, if the 105 or 106 node detects that the fault has changed, the switch generates a switchover request message and sends it to the other nodes on the ring through the control channel or data channel.
  • the services that are sent from the two path directions or sent only on the protection path are reselected and sent from the working path in one direction; for example: The 102-to-108-node service re-selects the path from 102-103-104-105-106-107-108 to transmit the service; and for the receiving node 108, the working path direction re-selects the service; and for the 103 node
  • the transmission of the service in both directions is also stopped, and only the service is sent in the direction of the 103-104-105-106-107 working path, and the receiving node 107 is restored to

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

Selon l’invention, pour mettre en œuvre une protection de façon relativement simple, pour récupérer et protéger des services rapidement, et pour mettre en œuvre la récupération et la protection de services poste à poste (P2P) et point à multipoint (P2MP) sur un réseau en anneau, un procédé de protection de réseau en anneau en fonction d’une détection de défaillance locale comprend les étapes suivantes : après avoir détecté une défaillance locale, un nœud génère un message de défaillance et envoie le message de défaillance aux autres nœuds sur le réseau en anneau; un nœud source envoie des services par un chemin en fonctionnement et un chemin de protection qui sont dans des sens contraires, et un nœud de destination reçoit les services par le chemin en fonctionnement ou le chemin de protection. L'invention porte en outre sur un système de protection de réseau en anneau en fonction d’une détection de défaillance locale.
PCT/CN2010/070773 2009-09-04 2010-02-26 Procédé de protection de réseau en anneau en fonction de détection de défaillance locale et système correspondant WO2011026319A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910008792.6 2009-09-04
CN2009100087926A CN102014011A (zh) 2009-09-04 2009-09-04 环网保护方法与系统

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US9779057B2 (en) 2009-09-11 2017-10-03 Micron Technology, Inc. Autonomous memory architecture
CN102882780B (zh) * 2011-07-15 2016-09-28 中兴通讯股份有限公司 基于共享路径的环网隧道配置方法、环网保护方法及系统
CN103023770B (zh) * 2011-09-21 2017-09-26 中兴通讯股份有限公司 环网的保护方法及装置
CN102299864B (zh) * 2011-10-08 2014-11-26 杭州华三通信技术有限公司 一种应用于二层虚拟专用网络的报文转发的方法和装置
CN102882757B (zh) * 2012-09-25 2015-01-28 华为技术有限公司 环网中点到多点业务的保护方法及环网中的上环节点
US10003675B2 (en) 2013-12-02 2018-06-19 Micron Technology, Inc. Packet processor receiving packets containing instructions, data, and starting location and generating packets containing instructions and data
CN106941436B (zh) * 2016-01-04 2020-06-02 中兴通讯股份有限公司 报文传输方法及装置
CN107181661A (zh) * 2016-03-11 2017-09-19 西门子公司 实时性故障保护方法、主节点、从节点和环形网络系统
CN106254199B (zh) * 2016-09-19 2020-03-31 重庆世纪之光科技实业有限公司 单向环形网络故障点定位方法、集中器、终端设备及系统
CN115134283A (zh) * 2021-03-08 2022-09-30 北京华为数字技术有限公司 一种环网保护方法及装置

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