WO2015067048A1 - Procédé et système de protection de redondance à travers des domaines vpls - Google Patents

Procédé et système de protection de redondance à travers des domaines vpls Download PDF

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Publication number
WO2015067048A1
WO2015067048A1 PCT/CN2014/079885 CN2014079885W WO2015067048A1 WO 2015067048 A1 WO2015067048 A1 WO 2015067048A1 CN 2014079885 W CN2014079885 W CN 2014079885W WO 2015067048 A1 WO2015067048 A1 WO 2015067048A1
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WO
WIPO (PCT)
Prior art keywords
spe
vpls
boundary node
domain
node
Prior art date
Application number
PCT/CN2014/079885
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English (en)
Chinese (zh)
Inventor
易放军
雷华
江乐
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中兴通讯股份有限公司
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.)
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Priority to RU2016118682A priority Critical patent/RU2016118682A/ru
Publication of WO2015067048A1 publication Critical patent/WO2015067048A1/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
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • 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
    • H04L45/22—Alternate routing
    • 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
    • H04L45/68—Pseudowire emulation, e.g. IETF WG PWE3

Definitions

  • the present invention relates to the field of communications, and in particular to a VPLS cross-domain redundancy protection method and system.
  • a Pseudo Wire (PW) connection must be established between nodes of a virtual private LAN service (VPLS) network.
  • VPLS virtual private LAN service
  • UOB PW The pseudowire
  • hierarchical H-VPLS is usually used.
  • the SPOKE PW is used to connect between adjacent HUB domains, enabling communication between all nodes and reducing the number of HUB connections.
  • communication between the two domains is inevitably interrupted.
  • the use of SPOKE PW to walk through TUNNEL FRR can effectively protect the link failure, but once the boundary SPE node fails, the link still cannot be effectively protected. Therefore, whether the SPOKE PW fails or the boundary SPE node fails, the link will still be unable to be effectively protected and cause traffic loss.
  • an effective solution has not been proposed yet.
  • a VPLS cross-domain redundancy protection method including: when a first pseudowire PW between a first VPLS domain and a second VPLS domain fails, using a first VPLS domain Performing data forwarding with the second pseudowire PW between the second VPLS domain, where the first PW is connected between the first SPE boundary node in the first VPLS domain and the third SPE boundary node in the second VPLS domain, The second PW is connected between the second SPE boundary node in the first VPLS domain and the fourth SPE boundary node in the second VPLS domain, and the second SPE boundary node and the fourth SPE boundary node are respectively in the first VPLS domain.
  • the second VPLS domain is added.
  • the first SPE border node and the second SPE border node communicate through the ICCP link, where the content of the communication includes: configuration information of the first PW, status information of the first PW, configuration information of the second PW, And the status information of the second PW, where the status information of the first PW is used to indicate whether the first PW has a fault, and the second PW status information is used to indicate whether the second PW has a fault.
  • the first PW state information includes: first detection state information and first protocol state information, where the first detection state information includes: bfd, tp-oam of the first PW; the second PW state information includes: Detecting the status information and the second protocol status information, where the second detection status information includes: bfd, tp-oam of the second PW ; wherein the first protocol status information and the second protocol status information both include: PW negotiation result, external Layer lsp, or tunnel state.
  • the method further comprises: performing data forwarding using the first PW and the second PW in the event of a failure of the ICCP link, and blocking the HUB PW between the first SPE boundary node and the second SPE boundary node.
  • the method further includes: when the first SPE border node fails, using the second PW for data forwarding.
  • the method further comprises: when the first SPE boundary node and the ICCP link both fail, use the second PW for data forwarding, and block the HUB PW between the first SPE boundary node and the second SPE boundary node.
  • the first SPE boundary node and the second SPE boundary node constitute an active end device
  • the third SPE boundary node and the fourth SPE boundary node constitute a passive end device.
  • the method further includes: blocking the second PW, and learning to delete the second PW at the active end device
  • the media access controls the MAC, and notifies the passive device and the other passive devices connected to the passive device to perform the MAC revocation operation and re-learn the MAC; the first SPE border node notifies the result that the first PW is determined to be the working PW
  • the third SPE border node, and the second SPE border node notify the fourth SPE border node of the result that the second PW is determined to be the backup PW.
  • a VPLS cross-domain redundancy protection system including: a switching module, configured to: when a first pseudowire PW between a first VPLS domain and a second VPLS domain fails, Performing data forwarding using a second pseudowire PW between the first VPLS domain and the second VPLS domain, where the first PW is connected to the first SPE boundary node in the first VPLS domain and the third in the second VPLS domain. Between the SPE boundary nodes, the second PW is connected between the second SPE boundary node in the first VPLS domain and the fourth SPE boundary node in the second VPLS domain, and the second SPE boundary node and the fourth SPE boundary node are in advance.
  • the settings are added in the first VPLS domain and the second VPLS domain, respectively.
  • the first SPE border node and the second SPE border node communicate through the ICCP link, where the content of the communication includes: configuration information of the first PW, status information of the first PW, configuration information of the second PW, and The second PW status information, where the status information of the first PW is used to indicate whether the first PW has a fault, and the status information of the second PW is used to indicate whether the second PW has a fault.
  • data forwarding between two VPLS domains is performed by using a standby PW preset between two adjacent VPLS domains.
  • FIG. 2 is a schematic structural diagram of a VPLS cross-domain redundancy protection method system according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a working mode of a boundary SPE of a cross-domain H-VPLS according to a preferred embodiment of the present invention
  • FIG. 5 is a PW link according to a preferred embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a working mode of a boundary node SPE when a boundary node fails according to a preferred embodiment of the present invention
  • FIG. 7 is a schematic diagram of a working mode of a boundary SPE when ICCP signaling fails according to a preferred embodiment of the present invention.
  • FIG. 8 is a decision flow chart of MC-PW-GROUP according to a preferred embodiment of the present invention
  • FIG. 9 is a schematic diagram of processing of MC-PW-GROUP decision result forwarding in accordance with a preferred embodiment of the present invention
  • the embodiment of the present invention mainly provides a VPLS cross-domain redundancy protection method and system (establishing a protection decision mechanism between adjacent VPLS domains) to achieve redundancy backup of inter-domain PW and SPE nodes. purpose. After the working PW (or the working PW-side SPE) fails, the backup PW and SPE can start working in time to ensure that the traffic between the entire domain remains unblocked.
  • the embodiment of the invention provides a VPLS cross-domain redundancy protection method.
  • FIG. 1 is a flowchart of a VPLS cross-domain redundancy protection method according to an embodiment of the present invention. As shown in FIG.
  • the method mainly includes the following steps (step S102): Step S102, when a first VPLS domain and a second VPLS domain are used.
  • Step S102 data forwarding is performed by using a second pseudowire PW between the first VPLS domain and the second VPLS domain, where the first PW is connected to the first in the first VPLS domain.
  • the second PW is connected between the second SPE boundary node in the first VPLS domain and the fourth SPE boundary node in the second VPLS domain, The two SPE boundary nodes and the fourth SPE boundary node are added in advance in the first VPLS domain and the second VPLS domain, respectively.
  • the data forwarding between the two VPLS domains can be continued by using the standby PW preset between the two adjacent VPLS domains. Ensure that the data is not interrupted.
  • the first SPE border node and the second SPE border node may communicate through the ICCP link, where the content of the communication may include: configuration information of the first PW, status information of the first PW, and second PW And the configuration information of the second PW, where the status information of the first PW is used to indicate whether the first PW is faulty, and the second PW status information is used to indicate whether the second PW is faulty.
  • the first PW state information may include: first detection state information and first protocol state information, where the first detection state information may include: bfd, tp-oam of the first PW; second PW state The information includes: second detection status information and second protocol status information, where the second detection status information may include: bfd, tp-oam of the second PW; wherein the first protocol status information and the second protocol status information are both Includes: PW negotiation results, outer lsp, or tunnel status.
  • the first PW and the second PW may be used for data forwarding, and the HUB PW between the first SPE boundary node and the second SPE boundary node is blocked.
  • the second PW may be used for data forwarding.
  • the second PW may be used for data forwarding, and the HUB PW between the first SPE boundary node and the second SPE boundary node is blocked.
  • the first SPE boundary node and the second SPE boundary node constitute an active end device
  • the third SPE boundary node and the fourth SPE boundary node constitute a passive end device.
  • the second PW may also be blocked, and the media access control MAC learned by the second PW is deleted at the active end device. And notifying the passive device and the other passive devices adjacent to the passive device to perform the MAC revocation operation and re-learning the MAC; the first SPE boundary node notifying the third SPE boundary node of the result that the first PW is determined to be the working PW, And the second SPE border node notifies the fourth SPE boundary node of the result that the second PW is determined to be the backup PW.
  • the embodiment of the invention further provides a VPLS cross-domain redundancy protection system.
  • the system includes: a switching module 10.
  • the switching module 10 is configured to use a second pseudowire PW between the first VPLS domain and the second VPLS domain when the first pseudowire PW between the first VPLS domain and the second VPLS domain fails.
  • the first PW is connected between the first SPE boundary node in the first VPLS domain and the third SPE boundary node in the second VPLS domain, and the second PW is connected to the second in the first VPLS domain.
  • the second SPE boundary node and the fourth SPE boundary node are added in advance in the first VPLS domain and the second VPLS domain, respectively, between the SPE boundary node and the fourth SPE boundary node in the second VPLS domain.
  • the first SPE border node and the second SPE border node may communicate through the ICCP link, where the content of the communication may include: configuration information of the first PW, status information of the first PW, and second PW The configuration information, and the second PW status information, where the status information of the first PW is used to indicate whether the first PW has a fault, and the status information of the second PW is used to indicate whether the second PW has a fault.
  • the VPLS cross-domain redundancy protection method and system provided by the foregoing embodiments solve the problem that the link failure and the boundary node failure in the VPLS domain are likely to cause communication interruption and traffic loss, and the inter-domain link failure and the boundary node are reduced. The effect of traffic loss caused by a fault.
  • the VPLS cross-domain redundancy protection method and system provided by the foregoing embodiments are described and illustrated in more detail below with reference to FIG. 3 to FIG. 10 and the preferred embodiment.
  • the preferred embodiment relates to a packet-switched communication network.
  • the present embodiment proposes to deploy a redundant SPOKE PW.
  • the SPOKE PW between the inter-domain boundary nodes is redundantly protected by a specific blocking selection method, and does not cause a forwarding loop.
  • an SPE boundary node is added to each VPLS connection domain, and a SPOKE PW is added as a backup PW between the newly added boundary nodes, and the current redundancy negotiation mechanism is used to determine that the current operation should be performed.
  • the PW is used for forwarding, and the PW that is not working is blocked by traffic. Reference may be made to FIG. 4 (FIG.
  • FIG. 4 is a schematic diagram of a boundary SPE working mode of an inter-area H-VPLS according to a preferred embodiment of the present invention), as shown in FIG. 4, whether the inter-domain SPOKE PW fault or the boundary SPE fault decision mechanism can The correct selection of the working PW in time can reduce the traffic loss caused by the inter-domain link failure and the boundary node failure.
  • ICCP can be utilized for signaling communication between SPE devices.
  • the ICCP's TCP/IP channel ensures proper and orderly delivery of signaling.
  • Two boundary nodes of one VPLS Hub domain are selected as the active decision master (master) device, and two boundary nodes of the other VPLS Hub domain are used as passive decision-making (slave) devices.
  • the neighboring mac withdraw is advertised on the blocked SPE node, and the decision result of the PW redundancy selection needs to be notified to the border node of another VPLS domain. If the decision result received by the peer border SPE is not forwarded by the SPOKE PW of the SPE node, the MAC withdraw is notified to the neighbor.
  • the decision mechanism it is possible to select a new one for the current working SPOKE PW failure (here, FIG. 5, FIG.
  • the forwarded PW information causes other nodes in the two domains to refresh the mac forwarding entries.
  • the traffic converges on the new available link in a shorter period of time, reducing the loss of traffic.
  • the implementation process of the preferred embodiment mainly includes:
  • FIG. 3 is a schematic diagram of a cross-domain H-VPLS deployment manner according to a preferred embodiment of the present invention.
  • SPE1 and SPE2 are in the boundary of a full mesh VPLS domain
  • SPE3 and SPE4 are in another full mesh at the boundary.
  • the boundary of the VPLS domain There is a SPOKE pseudowire PW1 (ie, the above first PW) connection between SPE 1 and SPE 3, and a SPOKE pseudowire PW2 (ie, the above second PW) connection between SPE 2 and SPE 4.
  • the configuration selects SPE 1 and SPE 2 as the master node, and SPE 3 and SPE 4 as the slave nodes.
  • the MC-PW-GROUP On the SPE 1 and the SPE 2, the MC-PW-GROUP is deployed. PW1 and PW2 are added as the active and standby members of the protection group.
  • the MC-PW-GROUP on SPE 1 and SPE 2 are associated with the ICCP application, using the same roid to identify the matching protection group.
  • the detection status of the PW for example, bfd, tp-oam, etc.
  • the protocol status for example, the pw negotiation result, the outer layer lsp or the tunnel status, etc.
  • PW status information the information may be used to indicate the PW. Whether there is a fault, SPE 1 and SPE 2 need to synchronize this part of the information.
  • both SPE 1 and SPE 2 After both SPE 1 and SPE 2 get the PW1 and PW2 status information, the forwarding result can be determined. If both PW1 and PW2 are fault-free, PW1 is preferred as the working PW; if one PW is faulty, the non-faulty PW is selected; if both PW1 and PW2 are faulty, PW1 is selected.
  • 6 is a schematic diagram of a working mode of a boundary SPE when a boundary node fails according to a preferred embodiment of the present invention, as shown in FIG.
  • FIG. 8 is a decision flow chart of MC-PW-GROUP according to a preferred embodiment of the present invention.
  • the MC-PW-GROUP decision result affects the PW forwarding traffic. For the decision result of the MC-PW-GROUP, the traffic of the working pw is opened, and the PW traffic that does not work is blocked.
  • the mac that is blocked by the pw is actively deleted, and mac withdraw is sent to the neighbor PE and the inter-domain SPE, so that each node refreshes the mac entries on all PWs.
  • the SPE on the active side also needs to send the SPOKE PW to the active/standby to the passive SPE. If the passive side SPE receives the SPOKE PW and is selected as the inactive PW, it deletes the mac learned from the PW and sends a MAC withdraw to its neighbor PE. Through the above traffic blocking and mac withdraw transmission, it can ensure that traffic between domains converges to the SPOKE PW of the decision.
  • FIG. 9 is a schematic diagram of processing of forwarding of MC-PW-GROUP decision results according to a preferred embodiment of the present invention.
  • SPE node failure or ICCP signaling failure for redundancy protection. If SPE1 fails (see Figure 6), the ICCP chain break causes the signaling interaction to be interrupted and the MC-PW-GROUP negotiation fails. SPE2 will release the traffic forwarding from PW2 and issue a mac withdraw to the PW.
  • FIG. 7 is a schematic diagram of the operation of the boundary SPE when the ICCP signaling fails according to a preferred embodiment of the present invention. As shown in Figure 7, if the ICCP link fails, the signaling is interrupted, SPE 1 And SPE 2 will release traffic forwarding from PW1 and PW2 respectively. However, if PW1, PW2, PW3, and PW4 are in the forwarding state, a forwarding loop will be formed.
  • FIG. 10 is a schematic diagram of processing of forwarding when ICCP signaling fails according to a preferred embodiment of the present invention.
  • each of the above modules can be implemented by hardware.
  • a processor including the above modules, or each of the above modules is located in one processor.
  • software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.
  • a storage medium is provided, the software being stored, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like.
  • 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 are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention.
  • a VPLS cross-domain redundancy protection method and system provided by the embodiments of the present invention have the following beneficial effects: When a current working PW between two adjacent VPLS domains fails, the use is performed. The standby PW preset between the two adjacent VPLS domains performs data forwarding between the two VPLS domains to ensure that the data is not interrupted, and the traffic caused by the inter-domain link failure and the boundary node failure is reduced. The effect of the loss.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Procédé et système de protection de redondance à travers des domaines VPLS. Le procédé comporte les actions suivantes: lorsqu'un premier pseudo-fil (PW) entre un premier domaine VPLS et un deuxième domaine VPLS est défectueux, effectuer une réexpédition de données en utilisant un deuxième PW entre le premier domaine VPLS et le deuxième domaine VPLS, le premier PW étant branché entre un premier nœud frontalier SPE du premier domaine VPLS et un troisième nœud frontalier SPE du deuxième domaine VPLS, le deuxième PW étant branché entre un deuxième nœud frontalier SPE du premier domaine VPLS et un quatrième nœud frontalier SPE du deuxième domaine VPLS, et le deuxième nœud frontalier SPE et le quatrième nœud frontalier SPE étant respectivement ajoutés par avance au premier domaine VPLS et au deuxième domaine VPLS. Par conséquent, une perte de trafic causée par une défaillance de liaison entre des domaines et une défaillance de nœud frontalier est réduite.
PCT/CN2014/079885 2013-11-05 2014-06-13 Procédé et système de protection de redondance à travers des domaines vpls WO2015067048A1 (fr)

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RU2016118682A RU2016118682A (ru) 2013-11-05 2014-06-13 Способ и система кросс-доменного резервирования виртуальной частной локальной сети (вчлс)

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CN201310542984.1 2013-11-05
CN201310542984.1A CN104618233A (zh) 2013-11-05 2013-11-05 Vpls跨域冗余保护方法及系统

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CN107528700B (zh) * 2016-06-22 2021-08-17 中兴通讯股份有限公司 跨域边缘设备、分层vpls网络及其广播流量处理方法
CN107547291B (zh) * 2016-06-28 2021-02-12 华为技术有限公司 性能监控方法、装置及路由器
CN111698152B (zh) * 2019-03-15 2021-09-14 华为技术有限公司 一种故障保护方法、节点及存储介质
CN112737937B (zh) * 2019-10-14 2022-09-16 中国电信股份有限公司 信息跨域通告方法、系统和边界路由器

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