WO2008106883A1 - Procédé et dispositif d'élimination d'erreurs de connexion interne de noeuds rpr - Google Patents

Procédé et dispositif d'élimination d'erreurs de connexion interne de noeuds rpr Download PDF

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Publication number
WO2008106883A1
WO2008106883A1 PCT/CN2008/070372 CN2008070372W WO2008106883A1 WO 2008106883 A1 WO2008106883 A1 WO 2008106883A1 CN 2008070372 W CN2008070372 W CN 2008070372W WO 2008106883 A1 WO2008106883 A1 WO 2008106883A1
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WO
WIPO (PCT)
Prior art keywords
span
node
ring
fault
spans
Prior art date
Application number
PCT/CN2008/070372
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English (en)
Chinese (zh)
Inventor
Yue Wang
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 WO2008106883A1 publication Critical patent/WO2008106883A1/fr

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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
    • 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 network communication technologies, and in particular, to a method and a device for processing internal connection faults of a Resilient Packet Ring (RPR) node.
  • RPR Resilient Packet Ring
  • RPR is a reverse double-ring structure. It can transmit data simultaneously on two rings. It is a new metropolitan area network standard because of its interface bandwidth, carrier-class fault switching capability, and efficient bandwidth utilization. RPR has gradually been favored by more and more operators due to its many advantages such as physical layer independence.
  • the ring includes 6 RPR nodes, the outer ring clockwise single ring is called 0 ring, and the inner counterclockwise single ring is called 1 ring; between two adjacent RPR nodes.
  • a link is called a segment (SPAN), and a SPAN consists of a pair of unidirectional links in opposite directions.
  • SPAN For each node, there are two SPANs, called westbound SPAN and eastbound SPAN, respectively, where westbound SPAN is used.
  • East SPAN is used to receive 1 ring data and send 0 ring data.
  • RPR's fault self-healing capability is very strong, enabling fault protection switching within 50ms.
  • RPR ring disconnected due to the fault shown in Figure 2, after rapid fault processing, all data streams can be avoided by disconnecting the link due to the fault, and the normal transmission of the data stream is realized.
  • a SPAN that cannot be used to transfer data is called an edge.
  • link failure including signal failure (SF, Signal Fail) and signal degradation (SD, Signal degrade).
  • SF signal failure
  • SD Signal degrade
  • each node on the RPR ring detects its own SPAN in real time. State, and obtain the status of other SPANs on the ring through information published by other nodes. When a change is detected, the analysis is processed based on all the data collected, and a quick response is made.
  • the transmission and reception functions of the east-facing SPAN and the west-direction SPAN may be distributed on different hardware, and the internals are connected by fiber or cable.
  • This internal connection is also part of the RPR ring, which can also cause breakage of the RPR ring if the internal connection fails.
  • the main purpose of the embodiments of the present invention is to provide an RPR node internal connection fault processing method and device, which can ensure the connectivity and availability of the ring network to the greatest extent in the event of an internal connection failure of the RPR node.
  • the RPR node internal connection fault processing method is as follows: When the first node on the RPR ring detects an internal connection fault, the link analysis result is obtained from the link state information of the current RPR ring;
  • the link analysis result is: the first node has a SPAN generation edge;
  • the selecting the first SPAN simulation to generate the SF from the two SPANs of the first node according to the link analysis result includes: selecting a SPAN simulated generated SF of the generated edge from the two SPANs of the first node.
  • the link analysis result is: the node except the first node has a SPAN generation edge; the selecting the first SPAN simulation generation SF from the two SPANs of the first node according to the link analysis result includes: The SPAN of the node's two SPANs that selects the nearest edge on the ring simulates the generation of the SF.
  • the link analysis result is: the first node has a SPAN fault
  • the selecting the first SPAN simulation to generate the SF from the two SPANs of the first node according to the link analysis result includes: selecting the faulty SPAN simulation generation SF from the two SPANs of the first node.
  • the link analysis result is: the node except the first node has a SPAN fault on the ring; the selecting the first SPAN simulation to generate the SF from the two SPANs of the first node according to the link analysis result includes: The SPAN of the node's two SPANs that selects the closest link to the faulty link on the ring generates the SF.
  • the method further includes: when detecting that the selected SPAN does not have an SF failure, and another SPAN of the first node that is not selected has an SF failure, simulating the selected SPAN on the SF disappears, and selecting the Another SPAN of one node simulates the generation of SF.
  • the RPR node internal connection fault processing apparatus includes: a storage unit and a processing unit, wherein
  • a storage unit configured to store link state information of the RPR ring
  • the processing unit is configured to: when the internal connection fault occurs in the node, obtain the RPR ring link state information from the storage unit, obtain the link analysis result from the link state information, and obtain the two segments of the internal connection fault node according to the link analysis result.
  • SPAN selects the first SPAN analog to generate signal failure SF, And sending the SF signal to other nodes on the ring, and selecting the first SPAN analog to generate the SF, the number of nodes for transmitting the SF signal is greater than the number of nodes for transmitting the SF signal when the second SPAN is simulated to generate the SF.
  • the processing unit includes: an obtaining unit, a selecting unit, and a sending unit, where
  • An obtaining unit configured to obtain RPR ring link state information from the storage unit when the internal connection failure occurs, obtain link analysis result from the link state information, and send the link analysis result to the selecting unit;
  • a selecting unit configured to select a first SPAN simulation to generate an SF from two SPANs of the internal connection faulty node according to the received link analysis result, and send the generated SF information to the sending unit;
  • the processing unit further includes: an updating unit, configured to simulate that the SF on the first SPAN disappears when detecting that the selected first SPAN does not have an SF failure, and the second SPAN that is not selected has an SF failure, and Select the second SPAN simulation to generate the SF.
  • Figure 1 is a schematic diagram of an RPR ring in the prior art.
  • FIG. 2 is a schematic diagram of a disconnected RPR ring in the prior art.
  • FIG. 3 is a flowchart of a method for processing an internal connection failure of an RPR node according to an embodiment of the present invention.
  • 4 is a flow chart of replacing a SPAN simulation generated SF in an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an RPR node internal connection fault processing apparatus according to an embodiment of the present invention. Mode for carrying out the invention
  • the method for processing an internal connection fault of an RPR node mainly includes: when the first node on the RPR ring detects an internal connection fault, the link analysis result is obtained by the link state information of the current RPR ring; and according to the link analysis As a result, the first SPAN analog generation SF is selected from the two SPANs of the first node, and then the SF signal is sent to other nodes on the ring, and the number of nodes of the SF signal transmission when the first SPAN simulation is generated to generate the SF is greater than the selection of the second SPAN simulation. The number of nodes for SF signal transmission when generating SF.
  • the SPAN analog generation SF needs to be combined with the current link state information of the RPR ring to ensure that the node with internal connection failure can be connected with as many nodes as possible. In this way, the connectivity and availability of the ring network can be maximized in the event of an internal connection failure in the node, enabling the ring network to provide more reliable services.
  • the link state of the RPR ring includes the status of two SPANs of the node that has an internal connection failure, and the status of other links on the ring, that is, other SPANs.
  • Each node on the RPR ring detects the status of its own SPAN in real time and obtains the status of other SPANs on the ring through information published by other nodes.
  • the link status includes information such as whether the link has generated an edge and whether the link has a fault.
  • the link analysis result includes: whether there are edges or faults in the two SPANs of the first node, and whether other nodes on the ring except the first node have edges or faults.
  • the RPR node internal connection fault processing method provided by the present invention is described in detail below with reference to FIG. Description, as shown in Figure 3, the method mainly includes the following steps:
  • Step 301 Each node on the RPR ring detects its internal connection status in real time.
  • the node checks the link state information of the RPR ring and determines the two SPANs of the node. If there is an edge, if yes, go to step 302; otherwise, go to step 303.
  • Step 302 Select a SPAN simulation of the generated edge from the two SPANs of the first node to generate the SF, and then end the processing of the process.
  • selecting the SPAN analog to generate the SF does not cause a topological change of the RPR ring, and does not affect the transmission of the data stream on the ring.
  • Step 303 The first node learns the status of other links on the ring according to the information advertised by other nodes on the ring, and determines whether there are edges in other links on the ring, and if yes, performs step 304; otherwise, performs Step 305.
  • Step 304 Select the SPAN simulation closest to the edge on the ring from the two SPANs of the first node to generate the SF, and then end the processing of the process.
  • the SPAN closest to the edge on the distance ring refers to the SPAN in the direction that can reach the edge with the shortest hop count. For example, in Figure 1, if node A has an internal connection failure, and it is known that there are no edges in the two SPANs of the node, and the westward SPAN of the node B generates an edge, then node A will select its own westward SPAN to simulate the generation of SF. Because the westward SPAN of node A is closest to the westward SPAN of node B. Such a selection method can connect the node in which the internal connection failure occurs with as many nodes as possible, thereby improving the connectivity of the ring network.
  • Step 305 The first node determines whether there is a fault in the two SPANs of the node. If yes, step 306 is performed; otherwise, step 307 is performed.
  • Step 306 The first node selects a faulty SPAN mode from two SPANs of the node. It is planned to generate SF, and then the processing of this process is ended.
  • both SPANs of the first node are faulty, you can choose one of the SPAN simulations to generate the SF, because the faulty SPAN is likely to generate edges.
  • Step 307 The first node determines whether there is a fault in other links on the ring. If yes, go to step 308; otherwise, go to step 309.
  • Step 308 The first node selects, from the two SPANs of the node, the link with the fault on the ring, that is, the SPAN simulation to generate the SF after the shortest hop reaches the faulty link, and then ends the process. deal with.
  • Step 309 If there is no edge and no fault in all links on the ring, the first node may arbitrarily select a SPAN simulation to generate the SF from the two SPANs of the node, and then end the processing of the process.
  • the first node can broadcast the information to other nodes on the ring, so that the data stream is no longer transmitted through the SPAN of the analog generation SF to ensure the availability of the ring network.
  • step 301 after the first node determines that there are no edges in the two SPANs, step 305 may be performed first; when step 305 returns a negative judgment result, step 303 is performed; After the judgment result, step 307 is performed. That is to say, the first node first determines whether there are edges in the two SPANs of the node, or whether there is a fault. When the two SPANs of the node are neither edged nor faulty, whether the other links on the ring are judged whether There is an edge, or there is a fault.
  • the first node may also directly select one SPAN simulation generation SF from the two SPANs of the node, and end the processing of the process.
  • the link state of the RPR ring needs to be from two SPANs of the node where the internal connection failure occurs.
  • Select a SPAN simulation to generate the SF For example, from hair In the two SPANs of the internal connection fault node, select the SPAN simulation to generate the SF that has generated the edge or the fault may generate the edge, or select the SPAN simulation to generate the SF from the link that has generated the edge on the ring or the link that may have the fault.
  • the ring network can provide a more reliable service.
  • the SF can be generated for the simulation according to the change of the topology information and the link state of the ring network in real time.
  • the SPAN is replaced.
  • the process mainly includes the following steps:
  • Step 401 The first node detects the status of the two SPANs of the node in real time, and determines whether the change is detected. If yes, step 402 is performed; otherwise, the process of the process ends.
  • Step 402 The first node determines whether there is an internal connection fault. If yes, step 403 is performed; otherwise, the processing of the flow ends.
  • Step 403 The first node determines whether the SPAN of the analog generated SF selected in the previous processing of the internal connection fault currently has an SF fault, and if yes, ends the processing of the flow; if not, the step 404 is performed.
  • Step 404 The first node determines whether another SPAN of the node (relative to the SPAN of the previously selected simulated SF) has an SF fault. If yes, step 405 is performed; otherwise, the process ends. .
  • Step 405 The SF on the SPAN selected before the first node simulation disappears, and another SPAN simulation is selected to generate the SF.
  • the present invention further provides an RPR node internal connection fault processing apparatus.
  • the device includes: Storage unit and processing unit.
  • the storage unit is configured to store link state information of the RPR ring
  • the processing unit is configured to obtain RPR ring link state information from the storage unit when the RPR node has an internal connection fault, and obtain link analysis by the link state information.
  • the first SPAN analog generation SF is selected from the two SPANs of the internal connection fault node according to the link analysis result, and the SF signal is sent to other nodes on the ring, and the node that transmits the SF signal when the first SPAN simulation generates the SF is selected.
  • the number is greater than the number of nodes for which the SF signal is transmitted when the second SPAN is simulated to generate the SF.
  • the processing unit may specifically include: an obtaining unit, a selecting unit, and a sending unit.
  • the acquiring unit is configured to acquire RPR ring link state information from the storage unit when the node has an internal connection fault, obtain link analysis result from the link state information, and send the link analysis result to the selecting unit; And configured to select, according to the received link analysis result, the first SPAN simulation to generate the SF from the two SPANs of the internal connection faulty node, and send the generated SF information to the sending unit, and send the unit, according to the received
  • the SF information sends SF signals to other nodes on the ring.
  • processing unit may further include: an updating unit, configured to simulate the SF on the first SPAN when detecting that the selected first SPAN does not have an SF failure, and the second SPAN that is not selected has an SF failure Disappears and selects the second SPAN simulation to generate the SF.
  • an updating unit configured to simulate the SF on the first SPAN when detecting that the selected first SPAN does not have an SF failure, and the second SPAN that is not selected has an SF failure Disappears and selects the second SPAN simulation to generate the SF.

Abstract

L'invention concerne un procédé d'élimination d'erreurs de connexion interne de noeuds RPR (resilient packet ring). Lorsque le premier noeud de l'anneau RPR détecte une erreur de connexion interne, le résultat de l'analyse de liaison est obtenu à partir des informations d'état de liaison de l'anneau RPR courant. La première plage est sélectionnée parmi les deux plages du premier noeud en fonction du résultat de l'analyse de liaison pour simuler la génération d'une défaillance de signal (SF) et les signaux SF sont envoyés aux autres noeuds de l'anneau. L'invention concerne également un dispositif d'élimination d'erreurs de connexion interne des noeuds RPR.
PCT/CN2008/070372 2007-03-06 2008-02-28 Procédé et dispositif d'élimination d'erreurs de connexion interne de noeuds rpr WO2008106883A1 (fr)

Applications Claiming Priority (2)

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CN200710086722.3 2007-03-06
CNB2007100867223A CN100461737C (zh) 2007-03-06 2007-03-06 弹性分组环节点内部连接故障处理方法及装置

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WO2008106883A1 true WO2008106883A1 (fr) 2008-09-12

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CN100461737C (zh) * 2007-03-06 2009-02-11 华为技术有限公司 弹性分组环节点内部连接故障处理方法及装置
CN101170505B (zh) * 2007-12-04 2010-07-21 杭州华三通信技术有限公司 一种弹性分组环站点处理故障的方法及装置
CN101355502B (zh) * 2008-09-02 2010-12-29 中兴通讯股份有限公司 基于弹性分组环点到多点传递链路状态的方法

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US20030117946A1 (en) * 2001-12-26 2003-06-26 Alcatel Method to protect RPR networks of extended topology, in particular RPR ring-to-ring and meshed backbone networks, and relating RPR network
EP1434392A2 (fr) * 2002-11-26 2004-06-30 Alcatel Canada Inc. Gestion de topologie pour un réseau en double anneau
CN1897546A (zh) * 2005-07-15 2007-01-17 华为技术有限公司 检测弹性分组环接口上外部环回的方法及装置
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CN101022389A (zh) 2007-08-22

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