WO2010000172A1 - Procédé, système, dispositif d'extrémité de réception et dispositif source de multidiffusion pour protection de multidiffusion - Google Patents

Procédé, système, dispositif d'extrémité de réception et dispositif source de multidiffusion pour protection de multidiffusion Download PDF

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Publication number
WO2010000172A1
WO2010000172A1 PCT/CN2009/072195 CN2009072195W WO2010000172A1 WO 2010000172 A1 WO2010000172 A1 WO 2010000172A1 CN 2009072195 W CN2009072195 W CN 2009072195W WO 2010000172 A1 WO2010000172 A1 WO 2010000172A1
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WIPO (PCT)
Prior art keywords
multicast
connection
protection
vlan
working
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PCT/CN2009/072195
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English (en)
Chinese (zh)
Inventor
吴迪
凌义
赵诤
任翔
段学罡
覃剑宏
赵凤华
雷大宇
伍孝敏
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华为技术有限公司
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Publication date
Priority claimed from CNA2008100682359A external-priority patent/CN101374075A/zh
Priority claimed from CN2008101291723A external-priority patent/CN101296153B/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2010000172A1 publication Critical patent/WO2010000172A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
    • H04L12/1877—Measures taken prior to transmission
    • 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
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure

Definitions

  • Multicast protection method, system, receiving device and multicast source device The application is submitted to the Chinese Patent Office on June 30, 2008, and the application number is 200810068235. 9 , and the invention name is "method, device and method for protecting multicast source” System” and the Chinese Patent Office submitted to the Chinese Patent Office on June 30, 2008, application number 20081012917. 2. The priority of the Chinese patent application entitled “A Multicast Protection Method, System and Equipment”, the entire contents of which are incorporated by reference. In this application. Technical field
  • the receiver sends an alarm that the multicast primary link is faulty.
  • the transmitting end of the MPLS 0AM or BFD detection packet After receiving the alarm that the multicast primary link is faulty, the transmitting end of the MPLS 0AM or BFD detection packet generates a protocol through the multicast forwarding path, for example, sends an IGMP Query message, and the user terminal that receives the 4 ⁇ message sends the IGMP Repor. The method of responding to the packet, thereby generating a new multicast routing forwarding tree to implement protection switching.
  • the embodiments of the present invention provide a multicast protection method, a system, a receiving end device, and a multicast source device, which are used to implement multicast protection when a network fails.
  • a receiving unit configured to receive multicast data from a multicast source from a first connection or a second connection, where the first connection is a current working connection, and the second connection is a current protection connection;
  • a switching unit configured to notify the receiving unit to receive multicast data from the multicast source from the second connection when the detecting unit detects that the first connection fails.
  • the multicast data sending unit is configured to send multicast data to the working connection and the protection connection. Through the detection of different connection states, the connection failures are quickly switched, and connection-based multicast protection is realized, which has the advantages of saving bandwidth, facilitating operator management, and high network security.
  • FIG. 6 is a flowchart of a configuration of an ETH-0AM mode according to an embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of a receiving end device according to an embodiment of the present invention
  • FIG. 17B is a schematic structural diagram of a receiving end device according to another embodiment of the present invention. detailed description
  • An embodiment of the present invention provides a multicast protection method, where the method is applied to a network including a working connection and at least one protection connection. As shown in FIG. 1, the method includes:
  • the multicast VLAN implements cross-VLAN replication of multicast data, which avoids the waste of bandwidth between A-Bs when sending the same multicast data to different user VLANs.
  • the multicast VLAN is configured by the common VLAN. Only the multicast VLAN can replicate multicast data to its user VLAN. Only the multicast data copied from the multicast VLAN to the user VLAN can be transmitted in the user VLAN.
  • selecting whether to receive multicast data from the first multicast VLAN or the second multicast VLAN is determined at the receiving end.
  • the default working multicast VLAN can be configured on the receiving end.
  • the first multicast VLAN can be configured as the default.
  • the receiving end After the receiving end starts running, it first detects the status of the first multicast VLAN and the second multicast VLAN. When both are normal, the first multicast VLAN is found to be the default working multicast VLAN, and the receiving end determines the selection. Multicast data of the first multicast VLAN.
  • the receiving end detects that the first multicast VLAN is faulty, the receiving end performs multicast VLAN switching, and receives the same multicast data sent by the multicast source through the second multicast VLAN. Specifically, when the receiving end detects that the first multicast VLAN, that is, the working multicast VLAN, fails, the receiving end performs multicast switching, and receives the multicast data sent by the multicast source through the second multicast VLAN.
  • the multicast data is switched to the second multicast VLAN, and the user VLAN saved in the first multicast VLAN is mapped to the second multicast VLAN, not on the second multicast VLAN. Create and save the user VLAN.
  • the receiving end may further receive the IGMP message sent by the multicast source through the second multicast VLAN and the IGMP message sent by the first multicast VLAN.
  • S602 Configure the MEP (MA Edge Point, MA boundary node) -W and configure MEP-P on the MA-P of PE1, and then create the working multicast VLAN and the protected multicast VLAN respectively.
  • CC sends the state machine. In this way, the working multicast VLA and the protected multicast VLAN on the PE1 side send 802. lag CC packets at a rate of 10 ms/s.
  • the CC packets carry the bridge MAC of the device that sends the CC packets (Media Access Control, medium). Access control), the transmission frequency of CC messages, the names of MDs and MAs, MEP-1D and other information.
  • s 702. Determine whether a CC message is received, if yes, continue with s 703, otherwise, perform s 710.
  • the PE2 if the CC message received from the first multicast VLAN does not have any errors such as a bridge MAC error, a MD and/or MA name mismatch, or a CC frequency mismatch, the PE2 considers that the received CC packet is correct. If the CC message is not received, or the received CC message has the above error, the CC counter on PE2 will be incremented by 1. For example, when this counter is added to 3, the first multicast VLAN is considered to be faulty. Then, the automatic protection switching of the multicast VLAN is performed.
  • PE 2 receives a certain number of correct CC packets from the first multicast VLAN in a thousand CC detection period, for example: in 8 CCs If the 7 correct CC packets are received within the detection period (80 ms), the link of the first multicast VLAN is restored. At this time, the multicast data from the multicast source can be recovered from the first multicast VLAN.
  • the above detection of working multicast VLANs can also be applied to the protection of multicast VLANs.
  • multicast VLANs may be used to implement the method shown in the embodiment of the present invention.
  • three multicast VLANs may be configured as a working multicast VLAN.
  • the other two multicast VLANs are configured to protect the multicast VLAN.
  • the receiving end detects that the working multicast VLAN is faulty, select one of the two protected multicast VLANs as the new working multicast VLAN receiving group according to certain rules.
  • the working multicast VLAN is quickly switched when the working multicast VLAN fails, and the multicast protection based on the multicast VLAN is implemented.
  • Protection has the advantages of saving bandwidth, facilitating operator management, and high network security.
  • the ETH. 0AM detection of the working multicast VLAN and the protected multicast VLAN can be conveniently performed by using the 802. lag CC packet, and the switching time of the carrier level of 50 ms is guaranteed.
  • the same multicast data is taken in different VLANs. Compared with the protection based on multicast data, it is much simpler in the implementation of software, and the configuration of CC messages is also very convenient.
  • another embodiment of the present invention provides a multicast protection method, which can further reduce the equipment to be used and reduce the networking cost on the basis of implementing multicast protection.
  • the method includes:
  • s 801. Receive multicast data from the multicast source from the first PW, where the first PW is the current working PW. s 802, when the first failure occurs, selecting the second PW from the at least one protection PW as the new working PW;
  • FIG. 9 is a networking diagram of a PW-based multicast protection method according to an embodiment of the present invention.
  • PE1, PE2, and PE3 belong to the same VPLS network.
  • PE1 and PE2 establish P11
  • PE1 and PE3 establish P12.
  • P11 is the working PW and PW_2 is Protect PW
  • P12 is a backup of Pl l.
  • the multicast data from the multicast source is duplicated on Router 1 and enters P11 and P12 respectively.
  • PEl receives these two multicast data simultaneously or sequentially, and selects one of them. Forward to the user and discard the other. In this embodiment, it is assumed that multicast data from P11 is selected and forwarded to the user.
  • the PW-based multicast protection method provided by the embodiment of the present invention can reduce networking equipment, simplify the networking structure, and reduce the cost of networking.
  • ETH-0AM on the PE to check whether the link from the receiver to the multicast source is normal. You can check whether the working PW is working properly. After the ET H-0 AM is configured, you can use CC packets to check whether the working PW is faulty.
  • the method for configuring the ETH- 0AM and the method for detecting whether the working PW is faulty by using the CC packet can be referred to the description in the embodiment of the multicast protection method based on the multicast VLAN, and details are not described herein again.
  • the link connecting the working PW to the multicast source fails, according to some predetermined policy Select one of the multiple protection PWs as the new working PW.
  • multiple protection PWs are pre-set priorities. When the working PW fails, the protection PW with the highest priority is selected as the new working PW; or, at the working PW When a fault occurs, the new working PW is re-elected according to the load condition and/or resource condition of each protection PW.
  • a fast handover is performed when a working PW fails, and PW-based multicast protection is implemented, and fewer network devices can be used, which simplifies the networking structure and reduces the networking cost. .
  • another embodiment of the present invention provides a method for multicast protection, which can further reduce the equipment to be used and reduce the networking cost on the basis of implementing multicast protection.
  • the multicast protection method in this embodiment is a VSI-based multicast protection method.
  • the method configures a VSI protection group between a multicast source and a receiving end (such as a PE), the protection group includes a working VSI and at least one protection VSI; each VSI in the protection group can receive the same multicast data.
  • the working VSI forwards the IGMP protocol packet and forwards the multicast data according to the Layer 2 multicast forwarding table to protect the VSI from discarding the received data but forwarding the IGMP protocol packet.
  • the method includes:
  • S1103 Receive a multicast stream from the multicast source from the second VSI.
  • FIG. 12 and FIG. 13 are taken as an example to illustrate the specific implementation of the VS I-based multicast protection method in the embodiment of the present invention. Implementation.
  • FIG. 12 it is a networking diagram of a VS I-based multicast protection method according to an embodiment of the present invention.
  • VSI_1 is established between PE1 and PE2, VSI_2 is established between PE1 and PE3, and VSI protection group is configured on PE1.
  • VSI-1 is the working VSI
  • VSI-2 is the protection VSI
  • VSI-2 is the backup of VSI-1.
  • PEl receives the two multicast data at the same time or in succession, and selects one of them to forward to the user and the other to discard. In this embodiment, it is assumed that multicast data from VS I _ 1 is selected and forwarded to the user.
  • Check whether the link between VSI_1 and VSI_2 to Router1 is normal on PE1. If PE2 fails, the link between VSI_1 and Router1 can be detected on PE1. In this case, PE1 selects the multicast from VSI_2. The data ensures that the user's application is not affected.
  • FIG. 13 is a networking diagram of another VS I-based multicast protection method according to an embodiment of the present invention.
  • VSI_1 is established between PE1 and PE2
  • VSI_2 is established between PE1 and PE3.
  • Configure a VSI protection group where VSI-1 is the working VSI, VSI-2 is the protection VSI, and VSI-2 is the backup of VSI-1.
  • the two multicast sources 1 and 2 send the same multicast data.
  • the multicast data sent by multicast source 1 enters VSI_1, and the multicast data sent by multicast source 2 enters VSI_2.
  • the two multicast data are received simultaneously or sequentially on the PE1, and one of them is forwarded to the user, and the other is discarded.
  • PE1 selects multicast data from VSI_1.
  • two independent multicast sources 1 and 2 are used for data transmission, and the reliability is higher.
  • a VSI protection group when a VSI protection group is configured, two or more VSIs can be configured to form a protection group.
  • the configuration is not limited to being deployed on the PE or on a device with similar functions. deploy. After the ETH-0AM is configured on the PE to check whether the link from the receiver to the multicast source is normal, you can check whether the working VSI is working properly. After the ETH-0AM is configured, you can use the CC packet to check whether the working VSI is faulty.
  • one working VSI is determined, and the rest is to protect the VSI. If the link connecting the working VSI to the multicast source fails, multiple protections are selected according to some predetermined policy.
  • One of the VSIs is used as a new working VSI, such as multiple protection VSI presets. Prioritize, when the work VS I fails, select the high priority protection VS I as the new work VS I; or, when the work VS I fails, according to the load status and/or resource status of each protection VSI Re-elect new jobs vs I.
  • One embodiment of the present invention provides a multicast protection system, as shown in FIG. 14, including a multicast source device 10 and a sink device 20. There is a working connection and at least one protection connection between the multicast source device 10 and the receiving device 20, specifically:
  • the receiving end device 20 receives the multicast data from the multicast source device 10 from the first connection, where the first connection is the current working connection; when the first connection fails, the receiving end device 20 selects the second one from the at least one protection connection.
  • the connection acts as a new working connection, receiving multicast data from the multicast source device 10 from the second connection.
  • the foregoing connection may be a multicast VLAN, or a PW, or a VS I.
  • the receiving device 20 may further receive an IGMP message from the multicast source device 10 from the first connection and the second connection.
  • the receiving end device 20 may be a multicast destination node or an intermediate node.
  • the following describes a multicast protection system provided by another embodiment of the present invention, as shown in FIG. 15, including a multicast source device 10 and a sink device 20.
  • a working multicast VLAN and at least one protected multicast exist between the multicast source device 10 and the sink device 20.
  • VLAN VLAN, specific:
  • the receiving end device 20 receives the multicast stream from the multicast source device 10 from the first multicast VLAN, where the first multicast VLAN is the current working multicast VLAN; when the first multicast VLAN fails, the receiving end device 20
  • the second multicast VLAN is selected as the new working multicast VLAN from the at least one protected multicast VLAN, and the multicast stream from the multicast source device 10 is received from the second multicast VLAN.
  • the receiving end device 20 may further receive the IGMP message from the multicast source device 10 from the first multicast VLAN and the second multicast VLAN.
  • the foregoing connection may also be PW or VS I.
  • PW protection PW
  • VS I protection VS I
  • the message sending unit 12 is configured to send a CC message to the receiving end through the working connection and the protection connection. For example, when applied to a network that includes a working multicast VLAN and at least one protected multicast VLAN:
  • the multicast data sending unit 11 is configured to send multicast data to the receiving end by using the working multicast VLAN and the protection multicast VLAN;
  • the message sending unit 12 is configured to send a CC message to the receiving end by using the working multicast VLAN and the protection multicast VLAN.
  • An embodiment of the present invention provides a receiving end device. As shown in FIG. 17A, the receiving end device is applied to a network including a working connection and at least one protection connection, and includes:
  • the receiving unit 21 is configured to receive multicast data from the multicast source from the first connection, where the first connection is a current working connection;
  • the detecting unit 22 is configured to detect whether the first connection is faulty;
  • the receiving unit 21 is configured to receive, by the first multicast VLAN, multicast data from a multicast source, where the first multicast VLAN is a current working multicast VLAN;
  • the detecting unit 22 is configured to detect whether the first multicast VLAN is faulty.
  • the switching unit 23 is configured to: when the detecting unit 22 detects that the first multicast VLAN is faulty, notify the receiving unit 21 to receive multicast data from the multicast source from the second multicast VLAN, where the second multicast VLAN is At least one of the protected multicast VLANs.
  • the receiving unit 21 is further configured to receive a CC message sent by the multicast source by using the first multicast VLAN.
  • the detecting unit 22 may include:
  • the first detecting sub-unit 221 is configured to perform statistics on the CC message received by the receiving unit 21, and the cumulative value of the number of times the CC message is not received and the number of times the received CC message is incorrect exceeds a preset threshold. When it is determined that the first multicast VLAN fails, and the switching unit 23 is notified;
  • the detecting unit 11 may further include:
  • the switching unit 23 is further configured to notify the receiving unit 21 to receive the multicast data from the multicast source from the first multicast VLAN when the detecting unit 22 detects that the first multicast VLAN recovers from the fault.

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

Abstract

Les modes de réalisation de la présente invention portent sur un procédé, un système, un dispositif d'extrémité de réception et un dispositif source de multidiffusion pour une protection de multidiffusion utilisée dans des réseaux ayant une connexion fonctionnelle et au moins une connexion de protection. Le procédé comprend les opérations suivantes : les données de multidiffusion sont reçues de la source de multidiffusion par l'intermédiaire de la première connexion, et la première connexion est la connexion fonctionnelle courante; lorsqu'une défaillance se produit dans la première connexion, une seconde connexion est sélectionnée parmi au moins une connexion de protection en tant que nouvelle connexion fonctionnelle, ainsi les données de multidiffusion sont reçues de la source de multidiffusion par l'intermédiaire de la seconde connexion. La protection de multidiffusion décrite dans les modes de réalisation de la présente invention permet l'utilisation d'un plus petit nombre de dispositifs de réseau et un établissement de réseau simplifié, et l'établissement de réseau peut être plus flexible. La défaillance de multidiffusion est rapidement commutée par détection des états de la connexion fonctionnelle et de la connexion de protection, ainsi la protection de multidiffusion est réalisée, et l'invention offre des avantages en termes d'économie de bande passante, de gestion facilitée pour des opérateurs de réseau, et de sécurité de réseau élevée.
PCT/CN2009/072195 2008-06-30 2009-06-09 Procédé, système, dispositif d'extrémité de réception et dispositif source de multidiffusion pour protection de multidiffusion WO2010000172A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200810129172.3 2008-06-30
CNA2008100682359A CN101374075A (zh) 2008-06-30 2008-06-30 保护组播源的方法、装置和系统
CN2008101291723A CN101296153B (zh) 2008-06-30 2008-06-30 一种组播保护方法、系统和设备
CN200810068235.9 2008-06-30

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CN114422484A (zh) * 2021-12-16 2022-04-29 广东电网有限责任公司 一种组播方法、装置、移动终端及存储介质
CN114422484B (zh) * 2021-12-16 2024-01-30 广东电网有限责任公司 一种组播方法、装置、移动终端及存储介质

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