WO2013064027A1 - 一种跨环业务的保护方法及装置 - Google Patents

一种跨环业务的保护方法及装置 Download PDF

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Publication number
WO2013064027A1
WO2013064027A1 PCT/CN2012/083410 CN2012083410W WO2013064027A1 WO 2013064027 A1 WO2013064027 A1 WO 2013064027A1 CN 2012083410 W CN2012083410 W CN 2012083410W WO 2013064027 A1 WO2013064027 A1 WO 2013064027A1
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WIPO (PCT)
Prior art keywords
ring
cross
node
channel
service
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PCT/CN2012/083410
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English (en)
French (fr)
Inventor
曲延锋
杨慧
刘国满
马玉霞
Original Assignee
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
Priority to RU2014115846/08A priority Critical patent/RU2586568C2/ru
Priority to EP12846441.9A priority patent/EP2750336B1/en
Publication of WO2013064027A1 publication Critical patent/WO2013064027A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42Loop networks
    • H04L12/437Ring fault isolation or reconfiguration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4633Interconnection of networks using encapsulation techniques, e.g. tunneling

Definitions

  • the present invention relates to the field of cross-ring services, and in particular, to a method and device for protecting a cross-ring service.
  • the protection of the cross-ring service is mainly realized by superimposing the end-to-end linear protection by the in-loop protection.
  • the in-loop fault detection is used to detect whether there is a fault in the loop. If there is a fault, the in-loop protection is activated to protect and recover the cross-ring service. If the in-loop protection resource is unavailable, Linear end-to-end protection is enabled by LDI (Link Defect Indication) or client layer hold off time.
  • LDI Link Defect Indication
  • a method for protecting a cross-ring service includes:
  • the method further includes: a cross-ring service having the same cross-ring node and a destination node, passing Channels are separately configured for the cross-ring service on different rings.
  • the step of binding the inter-ring channel on the cross-ring node includes: respectively, the cross-ring service with the same cross-ring node and the destination node, the shared channel on the same ring passing through and the different rings passing through The configured channel is bound to one channel.
  • the step of configuring the shared channel for the cross-ring service on the same ring that is passed through includes: sharing the cross-ring service configuration on the same ring that passes through the same ring-over service with the same cross-ring node and the destination node Working channel and protection channel.
  • the step of detecting the state change of the ring through which the cross-ring service passes includes: detecting, by using the fault detection packet, whether a ring change occurs in the ring that the cross-ring service passes, and if so, notifying the state of the node on the ring Change information, the state change includes a failure and a failure disappears.
  • the step of performing protection switching or failback processing when a state change occurs includes: the node that receives the state change information performs protection switching or failback processing in the following manner:
  • the node in the fault ring switches the traffic on the working channel to the protection channel, and the protection channel
  • the traffic is transmitted to the standby cross-ring node, and the standby cross-ring node transmits traffic on the working channel or the protection channel of the next ring according to the fault condition of the next ring.
  • the step of performing protection switching or failback processing when a state change occurs includes: the node that receives the state change information performs protection switching or failback processing as follows:
  • the embodiment of the present invention further provides a protection device for a cross-ring service, including a channel configuration module, a fault detection module, a fault notification module, and a protection switching module, where:
  • the channel configuration module is configured to: configure a shared channel for the cross-ring service on the same ring that passes through the cross-ring service with the same cross-ring node and the destination node, and perform an inter-ring channel on the cross-ring node. Binding, specifying the primary cross-ring node and the alternate cross-ring node, and in each cross-ring service Binding channels for the cross-ring service on the upper ring node and the lower ring node;
  • the fault detection module is configured to detect whether a state change occurs in a ring through which the cross-ring service passes;
  • the fault notification module is configured to notify the ring node of the state change information when the fault detection module detects the state change;
  • the protection switching module is configured to perform protection switching or failback processing when a state change occurs in the passed loop.
  • the channel configuration module is further configured to configure a channel for the cross-ring service on a different ring that passes through the cross-ring service with the same cross-ring node and the destination node.
  • the channel configuration module is configured to perform the binding of the inter-ring channel in the following manner: a cross-ring service having the same cross-ring node and a destination node, a shared channel passing through the same ring, and a different ring passing through The separately configured channels are bound to one channel.
  • the channel configuration module is configured to configure a shared channel for the cross-ring service in the following manner: for the cross-ring service with the same cross-ring node and the destination node, configure the cross-ring service on the same ring that passes through Shared working channel and protection channel.
  • the protection switching module is configured to perform protection switching or failback processing in the following manner: when the state changes to a failure, and the fault is a fault that affects the traffic of the working channel and needs to be switched by the primary cross-ring node, The traffic on the working channel is switched to the protection channel, and the traffic is transmitted to the standby cross-ring node on the protection channel, and the traffic is transmitted on the working channel or the protection channel of the next ring according to the failure condition of the next ring.
  • the protection switching module is configured to perform protection switching or failback processing in the following manner: when the state changes to a failure, and the fault is a fault that affects the traffic of the working channel without performing the switching of the primary cross-ring node, The traffic of the cross-ring service on the working channel is switched to the protection channel, and the traffic is transmitted to the active cross-ring node on the protection channel.
  • the present invention can avoid establishing a corresponding cross-ring protection path for each cross-ring service and reduce the complexity of the configuration.
  • the same single-ring uplink-outgoing node (cross-link) is available on the ring.
  • the cross-ring service of the point node and the destination node can be aggregated and transmitted to the shared working channel or the protection channel, which reduces the workload of configuring the working channel and the protection channel.
  • FIG. 1 is a flowchart of a method for protecting a cross-ring service according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a configuration relationship of a multi-ring and two-node interconnection sharing channel according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a cross-ring service protection based on a shared channel according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a switchover of a primary cross-ring node caused by multiple link faults in a ring according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of protection switching when a primary cross-ring node fails according to an embodiment of the present invention
  • FIG. 7 is a structural diagram of a protection apparatus for a cross-ring service according to an embodiment of the present invention.
  • the method for protecting a cross-ring service in this embodiment includes:
  • Step 101 Configure a shared working channel (ring) for the cross-ring service on the same ring that passes through the same ring that has the same single-ring outgoing node (cross-ring node) and the destination outgoing node (destination node). And protection ring;
  • the destination outgoing node is not necessarily the actual destination node of the cross-ring service, and may be the destination outgoing node on multiple rings.
  • Step 102 Perform ring binding on the cross-ring transmission of the cross-ring service on the cross-ring node, and specify the primary cross-ring node and the standby cross-ring node.
  • Ring binding for cross-ring transmission of cross-ring services is a cross-ring service with the same cross-ring and destination nodes, shared channels on the same ring passing through, and separately configured channels on different rings. , bound as a channel.
  • Step 103 Bind a ring for the cross-ring service on the upper ring node and the lower ring node of the cross-ring service;
  • the bearer ring is bound to the cross-ring service to transmit the cross-ring service to the destination ring node of another ring through the working ring and the protection ring.
  • Cross-ring services can be services such as LSP (Label Switched Path), IP, and PW (Pseudowire).
  • Step 104 Detecting, by the fault detection packet, whether a node, a link, a cross-ring node, or an interconnected shared link has a state change, and the state change includes generating a fault and the fault disappears;
  • Step 105 A node that detects a state change is notified of state change information to other nodes on the ring.
  • Step 106 The node that receives the state change information initiates the protection switching or the failback process according to the state change type.
  • the state change includes two situations: fault occurrence and fault disappearance.
  • the protection switchover is performed.
  • the protection switchback is performed.
  • the protection switchback process is the reverse process of the protection switchover process.
  • the faults on the ring include: failures that affect the traffic transmission of the ring, but do not require the failure of the primary cross-ring node to switch and the failure of the primary cross-ring node to be switched. These two faults can be distinguished by the corresponding deployment in the fault detection module, and will not be described here.
  • the protection can be achieved by the active/standby switchover in the single ring.
  • the traffic that is transmitted to the adjacent ring through the primary cross-ring node needs to be switched to the protection ring.
  • the standby cross-ring node transmits the traffic to the adjacent ring according to the ring-ring binding relationship, and on the adjacent ring, further determines whether the corresponding intra-ring protection switching needs to be performed according to the fault condition.
  • the aggregation ring 1 and the three access rings are interconnected by the node C and the node C1.
  • the service 1 of the F1 to B1 is along the F1-C1-B1.
  • Path transmission traffic 1 of F1 to A1 is transmitted along the path of F1-C1-B1-A1
  • service 3 of E1 to B1 is transmitted along the path of E1-C1-B1
  • service 4 of F1 to B1 is transmitted along F-F1-C1- The path of B1 is transmitted.
  • the method for protecting a cross-ring service in this embodiment includes: Step 301: Configure a same working ring and protection ring on the same ring that passes through the same ring that has the same cross-ring node and the destination node, that is, configure a small ring in the ring;
  • the node C1 is the primary cross-ring node on the access ring (the cross-ring node in the normal network condition), and the node C is the standby cross-ring node on the access ring.
  • services 1, 3, and 4 share the rin g 23 on the aggregation ring.
  • Access ring 1 needs to create clockwise for service 1 and service 2 respectively. Ring work ring.
  • Both service 1 and service 4 share the same working ring and protection ring on the access ring and the aggregation ring. As shown in the figure, ringl is shared on access ring 1, rin g 23 is shared on the aggregation ring, and the work ring is shared. Protection ringo
  • Service 3 and Service 1 are on different access rings, but the transmission process on the aggregation ring shares the same working ring (B1 is the clockwise ring working channel ring23 of the outgoing node).
  • Step 302 Bind the inter-ring channel on the multi-ring intersecting node (cross-ring node), bind it to a connection ring, and specify the primary and backup cross-ring nodes for the connection ring.
  • the uplink services 1, 3, and 4 all correspond to the ring23 on the aggregation ring. Therefore, on the cross-ring nodes C and C1, the binding relationship between the ring 23 and the ring 1 and ring 3 is required to be established. Ringl and ring3 are bound to a large ring, that is, ring (ClBl). On the CI node, the traffic transmitted along ringl and rin g 3 is label-switched, unified and aggregated to rin g 23 and transmitted to the B1 node; On nodes C and C1, specify the cross-ring primary node as C1 for ring (ClBl) and C for the cross-ring standby node.
  • the corresponding small nodes on the convergence ring are different due to different destination nodes, that is, these 3 corresponds to the downlink traffic big ring, each of the large ring is bound in a ring and a small aggregation small access r ing o step 303: when there is need to cross-ring service transmitted on the service, ring node Select it Selecting the corresponding ring as the ring on the ring, and protecting the service traffic through the protection switch on the ring during the transmission;
  • Service 3 is not reflected on other nodes on the ring except for the configuration on the upper and lower ring nodes. As shown in FIG. 3, service 3 is bound to its corresponding working ring 3 and protection ring 4 on the upper ring node E1, and its corresponding working ring 23 and protection ring 24 are bound on the lower ring node B1 in other nodes (including corresponding crosses). On the ring node, C1), there is no service 3 related information.
  • Step 304 Detecting the presence of a node or a link or a two-ring connected cross-ring node or an interconnected shared link through a fault detection message (such as: CC&CV (continuity check & Connectivity Verification), BFD (Bidirectional Forward Detection), etc.)
  • a fault detection message such as: CC&CV (continuity check & Connectivity Verification), BFD (Bidirectional Forward Detection), etc.
  • State change state change includes two cases of fault occurrence and fault disappearance;
  • Step 305 A node that detects a state change is notified of state change information to other nodes on the ring.
  • Step 306 The node that receives the state change information starts corresponding protection switching or failback processing according to the state change type.
  • the state change here includes two situations: fault occurrence and fault disappearance.
  • the protection switchover is performed.
  • the protection switchback is performed.
  • the protection switchback process is the reverse process of the protection switchover process.
  • the faults on the ring can be divided into two types: the impact on the traffic transmission of the ring, but the failure of the primary cross-ring node switching and the failure of the primary cross-ring node switching.
  • the protection can be achieved by the active/standby switchover in a single ring.
  • the link between E1-C1 fails.
  • ring3 is switched to the corresponding ring4 and transmitted.
  • the service 3 from E1 to B1 is transmitted along the E1 - E_C_C1 - B1 after the protection switching;
  • the traffic transmitted by the primary cross-ring node to the adjacent ring needs to be switched to the protection ring and transmitted to the standby cross-ring node, and the alternate cross-ring node is bound according to the ring relationship between the rings.
  • the traffic is transmitted to the adjacent ring, and on the adjacent ring, it is further determined whether the corresponding in-loop protection switching needs to be performed according to the fault condition.
  • the link between the C-C1 link and the E1-C1 link fails at the same time.
  • the cross-ring standby node C detects that the traffic cannot be transmitted through the cross-ring primary node C1, and the traffic must be switched to the cross.
  • Ring ring node C comes out of the ring, that is, the traffic of rin g 3 is switched to rin g 4 on the El node, and when it is transmitted to the C node along rin g 4 , the C node according to the configured ring binding relationship will be from the rin g 4
  • the traffic received on the switch is switched to the aggregation ring for transmission.
  • the traffic is selected to be transmitted along the rin g 24 to the destination node B1, that is, the dotted line is separated as shown in FIG.
  • the service 3 from E1 to B1 is transmitted along the E1-ECBA-A1-B1 after the protection switching.
  • the traffic switching process is as shown in Figure 5. The switching process shown is the same.
  • the protection device for the cross-ring service of the embodiment includes: a channel configuration module, a fault detection module, a fault notification module, and a protection switching module, where:
  • the channel configuration module is configured to: configure a shared channel for the cross-ring service on the same ring that passes through the same ring, and configure a channel for the cross-ring service on different rings.
  • On the cross-ring node bind the inter-ring tunnel, specify the primary cross-ring node and the standby cross-ring node, and bind the channel to the cross-ring service on the upper ring node and the lower ring node of each cross-ring service. ;
  • the fault detection module is configured to detect whether a state change occurs in a loop through which the cross-ring service passes; the fault notification module is configured to notify the ring node of the state change information when the fault detection module detects the state change;
  • the protection switching module is set to perform protection switching or switching processing when a state change occurs in the passed loop.
  • the channel configuration module performs the binding of the inter-ring channel on the cross-ring node as follows: The cross-ring service with the same cross-ring node and the destination node, the shared channel on the same ring passing through and the different passages The separately configured channels on the ring are bound as one channel.
  • the channel configuration module configures the shared channel for the cross-ring service on the same ring that is passed through. It is a cross-ring service with the same cross-ring node and the destination node.
  • the cross-ring service is configured on the same ring.
  • the protection switching module is configured to perform protection switching or failback processing in the following manner: when the state changes to a failure, and the fault is a fault that affects the working channel and needs to be switched by the primary cross-ring node, the working channel is The traffic is switched to the protection channel, and the traffic is transmitted to the standby cross-ring node on the protection channel, and the traffic is transmitted on the working channel or the protection channel of the next ring according to the fault condition of the next ring; or
  • the traffic of the cross-ring service on the working channel is switched to the protection channel, and the protection channel is Traffic is transferred to the primary cross-ring node.
  • 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 particular combination of hardware and software.
  • the method and the device provided by the embodiments of the present invention can avoid establishing a corresponding cross-ring protection path for each cross-ring service, and reduce the complexity of the configuration; and, for the ring, have the same single-ring upper-out loop node (
  • the cross-ring service of the cross-ring node and the destination node can be aggregated and transmitted to the shared working channel or the protection channel, which reduces the workload of configuring the working channel and the protection channel.

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

Abstract

一种跨环业务的保护方法及装置,包括:对具有相同跨环节点和目的节点的跨环业务,在经过的相同的环上为所述跨环业务配置共享的通道,在跨环节点上,进行环间通道的绑定,指定主用跨环节点和备用跨环节点,并在每个跨环业务的上环节点和下环节点上为该跨环业务绑定通道;以及,检测所述跨环业务所经过的环是否发生状态变化,在发生状态变化时,进行保护切换或回切处理。本发明能够避免针对每个跨环业务建立对应的一个跨环保护路径,降低了配置的复杂度;另外,对于环上具有相同的跨环节点和目的节点的跨环业务,可汇聚到共享的工作通道或保护通道上传送,减少了配置工作通道和保护通道的工作量。

Description

一种跨环业务的保护方法及装置
技术领域
本发明涉及跨环业务技术领域, 尤其涉及一种跨环业务的保护方法及装 置。
背景技术
目前, 对于跨环业务的保护, 主要通过环内保护叠加端到端线性保护来 实现。 在具体的实现方法中, 通过环内故障检测, 来检测环内是否存在故障, 若存在故障, 则启动环内保护进行跨环业务的保护和恢复; 若环内保护资源 处于不可用状态,则通过 LDI( Link Defect Indication )或客户层拖延( Hold off ) 时间, 来启动线性端到端保护。
在现有的跨环保护方法中, 都需要为跨环业务配置端到端的跨环保护路 径, 进行配置的工作量比较大, 且具有一定的难度。
发明内容
本发明实施方式提供一种跨环业务的保护方法及装置, 无需配置端到端 的跨环保护路径, 降低配置的复杂度。 为解决上述技术问题, 本发明实施方式的一种跨环业务的保护方法, 包 括:
对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所 述跨环业务配置共享的通道, 在跨环节点上, 进行环间通道的绑定, 指定主 用跨环节点和备用跨环节点, 并在每个跨环业务的上环节点和下环节点上为 该跨环业务绑定通道; 以及
检测所述跨环业务所经过的环是否发生状态变化, 在发生状态变化时, 进行保护切换或回切处理。 该方法还包括: 对具有相同跨环节点和目的节点的跨环业务, 在经过的 不同的环上为所述跨环业务分别配置通道。 在跨环节点上进行环间通道的绑定的步骤包括: 将具有相同跨环节点和 目的节点的跨环业务, 在经过的相同的环上的共享的通道和经过的不同的环 上的分别配置的通道, 绑定为一个通道。 在经过的相同的环上为所述跨环业务配置共享的通道的步骤包括: 对具 有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所述跨环业 务配置共享的工作通道和保护通道。 检测所述跨环业务所经过的环是否发生状态变化的步骤包括: 通过故障 检测报文检测所述跨环业务所经过的环是否发生状态变化, 如果发生, 则向 该环上的节点通告状态变化信息, 所述状态变化包括发生故障和故障消失。 在发生状态变化时进行保护切换或回切处理的步骤包括: 收到所述状态 变化信息的节点通过如下方式进行保护切换或回切处理:
在所述状态变化为发生故障, 且故障为影响工作通道的流量并需要进行 主用跨环节点切换的故障时, 故障环内的节点将工作通道上的流量切换到保 护通道上, 在保护通道上将流量传输到备用跨环节点, 所述备用跨环节点根 据下一个环的故障情况, 在下一个环的工作通道或保护通道上传输流量。 在发生状态变化时进行保护切换或回切处理的步骤包括: 收到所述状态 变化信息的节点通过如下方式进行保护切换或回切处理:
在所述状态变化为发生故障, 且故障为影响工作通道的流量而不需要进 行主用跨环节点切换的故障时, 故障环内的节点将所述跨环业务在工作通道 上的流量切换到保护通道上, 在保护通道上将流量传输到主用跨环节点。 本发明实施方式还提供一种跨环业务的保护装置, 包括通道配置模块、 故障检测模块、 故障通告模块和保护切换模块, 其中:
所述通道配置模块设置为:对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所述跨环业务配置共享的通道, 在跨环节点上, 进行 环间通道的绑定, 指定主用跨环节点和备用跨环节点, 并在每个跨环业务的 上环节点和下环节点上为所述跨环业务绑定通道;
所述故障检测模块设置为检测所述跨环业务所经过的环是否发生状态变 化;
所述故障通告模块设置为在故障检测模块检测到状态变化时, 向环上节 点通告状态变化信息;
所述保护切换模块设置为在所经过的环发生状态变化时, 进行保护切换 或回切处理。
所述通道配置模块还设置为对具有相同跨环节点和目的节点的跨环业 务, 在经过的不同的环上为所述跨环业务分别配置通道。
所述通道配置模块是设置为通过如下方式进行环间通道的绑定: 将具有 相同跨环节点和目的节点的跨环业务, 在经过的相同的环上的共享的通道和 经过的不同的环上的分别配置的通道, 绑定为一个通道。
所述通道配置模块是设置为通过如下方式为所述跨环业务配置共享的通 道: 对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所 述跨环业务配置共享的工作通道和保护通道。
所述保护切换模块是设置为通过如下方式进行保护切换或回切处理: 在 所述状态变化为发生故障, 且故障为影响工作通道的流量并需要进行主用跨 环节点切换的故障时, 将工作通道上的流量切换到保护通道上, 在保护通道 上将流量传输到备用跨环节点, 根据下一个环的故障情况, 在下一个环的工 作通道或保护通道上传输流量。
所述保护切换模块是设置为通过如下方式进行保护切换或回切处理: 在 所述状态变化为发生故障, 且故障为影响工作通道的流量而不需要进行主用 跨环节点切换的故障时, 将所述跨环业务在工作通道上的流量切换到保护通 道上, 在保护通道上将流量传输到主用跨环节点。
综上所述, 本发明能够避免针对每个跨环业务建立对应的一个跨环保护 路径, 降低了配置的复杂度; 另夕卜,对于环上具有相同的单环上出环节点(跨 环节点)和目的节点的跨环业务, 可汇聚到共享的工作通道或保护通道上传 送, 减少了配置工作通道和保护通道的工作量。 附图概述
图 1为本发明实施方式的跨环业务的保护方法的流程图;
图 2为本发明实施方式的多环双节点互联共享通道配置关系示意图; 图 3为本发明实施方式的基于共享通道的跨环业务保护的流程图; 图 4为本发明实施方式的多环双节点互联环内故障时保护切换示意图; 图 5为本发明实施方式的环内多处链路故障造成主用跨环节点进行切换 的示意图;
图 6为本发明实施方式的主用跨环节点故障时的保护切换的示意图; 图 7为本发明实施方式的跨环业务的保护装置的架构图。
本发明的较佳实施方式
如图 1所示, 本实施方式的跨环业务的保护方法, 包括:
步骤 101 : 对具有相同单环出环节点 (跨环节点)和目的出环节点 (目 的节点) 的跨环业务, 在经过的相同的环上对该跨环业务配置共享的工作通 道 ( ring )和保护 ring;
对具有相同跨环节点和目的节点的跨环业务, 在经过的不同的环上需要 对该跨环业务分别配置通道。
目的出环节点并不一定是跨环业务实际的目的节点, 可能是在多个环上 的目的出环节点。
步骤 102: 在跨环节点上, 为跨环业务的跨环传送进行 ring绑定, 并指 定主用跨环节点和备用跨环节点;
为跨环业务的跨环传送进行 ring绑定是将具有相同跨环节点和目的节点 的跨环业务, 在经过的相同的环上的共享的通道和经过的不同的环上的分别 配置的通道, 绑定为一个通道。
步骤 103 : 在跨环业务的上环节点和下环节点上为跨环业务绑定承载 ring; 为跨环业务绑定承载 ring以便通过工作 ring和保护 ring将该跨环业务传 送到另一个环的目的出环节点上。跨环业务可以是如, LSP (标记交换路径)、 IP和 PW (伪线)等业务。
步骤 104: 通过故障检测报文检测环内节点、 链路、 跨环节点或互联共 享链路是否存在状态变化, 状态变化包括产生故障和故障消失;
步骤 105: 检测到发生状态变化的节点向环上其他节点通告状态变化信 息;
步骤 106: 收到状态变化信息的节点, 根据状态变化类型对应地启动保 护切换或回切处理。
状态变化包括产生故障和故障消失两种情况, 在产生故障时, 进行保护 切换, 在故障消失时, 进行保护回切, 其中保护回切过程是保护切换过程的 逆过程。
下面详细说明产生故障时的保护切换的处理流程。
对于跨环节点而言, 环上的故障包括: 对 ring的流量传送有影响但不需 要进行主用跨环节点切换的故障和需要进行主用跨环节点切换的故障。 这两 种故障通过故障检测模块中的相应部署即可区分开, 在此不再赘述。
对第一种故障, 通过单环内的主备切换即可达到保护的目的; 对第二种 故障, 需要将原有经主用跨环节点传送到相邻环的流量全部切换到保护 ring 传送到备用跨环节点, 并由该备用跨环节点根据环间 ring绑定关系将流量传 送到相邻环, 在相邻环上, 再进一步根据故障情况判断是否需要进行对应的 环内保护切换。
下面结合附图对本实施方式的跨环业务的保护方法进行说明。
在图 2所示的多环多节点互联网络中, 汇聚环 1和三个接入环均通过节 点 C和节点 C1互连, 正常情况下, F1到 B1的业务 1沿 F1-C1-B1的路径传 送, F1到 A1的业务 2沿 F1-C1-B1-A1的路径传送, E1到 B1的业务 3沿 E1-C1-B1的路径传送, F到 B1的业务 4沿 F-F1-C1-B1的路径传送。 如图 3 所示, 本实施方式的跨环业务的保护方法, 包括: 步骤 301: 对具有相同跨环节点和目的节点的多个跨环业务, 在所经过 的相同的环上配置一个相同的工作 ring和保护 ring, 即配置环内小 ring;
对于上述业务 1~4, 节点 C1为在接入环上的主用跨环节点(网络正常情 况下的跨环节点), 节点 C为在接入环上的备用跨环节点。 在上行业务方向, 汇聚环上业务 1、 3和 4共享 ring23。
虽然业务 1和业务 2在接入环 1上的传送路径都是 F1~C1 ( C1为两个业 务在接入环上的主用跨环节点) , 但由于目的节点不同 (业务 1的目的节点 为 B1 , 业务 2的目的节点为 A1 ) , 因此, 业务 1与业务 2在接入环上的业 务传送过程不共享同一个工作 ring, 接入环 1需要分别为业务 1和业务 2创 建顺时针环形工作 ring。
业务 1和业务 4在接入环和汇聚环上均共享同一个工作 ring和保护 ring, 如图中, 在接入环 1上共享 ringl , 在汇聚环上共享 ring23 , 并共享工作 ring 对应的保护 ringo
业务 3和业务 1虽然在不同的接入环上, 但在汇聚环上的传送过程共享 同一个工作 ring (以 B1为出环节点的顺时针环形工作通道 ring23 ) 。
步骤 302: 在多环相交节点 (跨环节点)上, 进行环间通道的绑定, 绑 定为一个连接 ring, 并为连接 ring指定主用和备用跨环节点;
在图 3中, 上行业务 1、 3、 4都对应汇聚环上的 ring23 , 因此, 在跨环 节点 C和 C1上,需要建立 ring23与 ringl、ring3的 1 : n的绑定关系,将 ring23、 ringl与 ring3绑定为一个大 ring, 即 ring ( ClBl ), 在 CI节点上, 对沿 ringl 和 ring3上传送的流量进行标签交换,统一聚合到 ring23上并传送到 B1节点; 同时, 在节点 C、 C1上, 为 ring ( ClBl )指定跨环主用节点为 C1 , 跨环备 用节点为 C。
另外, 与上行业务不同, 对于业务 1、 3、 4对应的下行业务而言, 即 B1 到 Fl、 El和 F的业务, 因目的节点不同, 在汇聚环上对应的小 ring也不同, 即这些下行业务对应了 3个大 ring, 每个大 ring里都绑定了一个汇聚小 ring 和一个接入小 ringo 步骤 303 : 当有业务需要跨环传送时, 在业务的上、 下环节点上为其选 择对应的 ring作为环上承载 ring, 传送期间通过 ring上的保护切换来完成对 业务流量的保护;
业务 3除在上、 下环节点上有配置以外, 在环上其他节点均无体现。 如图 3中所示, 业务 3在上环节点 E1上绑定其对应的工作 ring3和保护 ring4 , 在下环节点 B1上绑定其对应的工作 ring23和保护 ring24 , 在其他节点 (包括对应的跨环节点 、 C1 )上, 都无业务 3相关信息。
步骤 304:通过故障检测报文(如: CC&CV(continuity check& Connectivity Verification), BFD (Bidirectional Forward Detection)等 )来检测环内节点或链路 或两环相连接跨环节点或互联共享链路是否存在状态变化, 状态变化包括产 生故障和故障消失两种情况;
步骤 305: 检测到发生状态变化的节点向环上其他节点通告状态变化信 息;
步骤 306: 收到状态变化信息的节点, 根据状态变化类型启动对应的保 护切换或回切处理;
这里的状态变化包括产生故障和故障消失两种情况, 产生故障时进行保 护切换, 故障消失时进行保护回切, 其中保护回切过程是保护切换过程的逆 过程。
对于跨环节点而言, 环上的故障可分为两种: 对 ring的流量传送有影响 但不需要进行主用跨环节点切换的故障和需要进行主用跨环节点切换的故 障。
对第一种故障, 可以通过单环内的主备切换即可达到保护的目的, 如图 4所示, E1-C1间链路发生故障, 在 E1节点上将 ring3切换到对应的 ring4并 传送到 C1节点, 即沿图中点线相隔的线路所示, 从 E1到 B1的业务 3在保 护切换后沿 E1— E_C_C1— B1进行传送;
对第二种故障, 需要将原有经主用跨环节点传送到相邻环的流量全部切 换到保护 ring并传送到备用跨环节点, 并由该备用跨环节点根据环间 ring绑 定关系将流量传送到相邻环, 在相邻环上, 再进一步根据故障情况判断是否 需要进行对应的环内保护切换即可。 如图 5所示, C-C1间链路和 E1-C1间链路同时发生故障, 此时跨环备用 节点 C检测到已无法通过跨环主节点 C1来传送流量, 必须将流量切换到跨 环备用节点 C上来出环,即 ring3的流量在 El节点上切换到 ring4后,沿 ring4 传送到 C节点时, C节点根据配置的 ring绑定关系,将从该 ring4上接收到的 流量交换到汇聚环上进行传送, 同时, 作为汇聚环的入环节点, 根据故障情 况, 选择将流量沿 ring24传送到目的节点 B1 , 即如图 5中点线相隔的线路所 示, 从 E1到 B1的业务 3在保护切换后沿 E1-E-C-B-A-A1-B1进行传送。
如图 6所示, C1节点故障, 即 ring3的主用跨环节点发生节点故障, 必 须将流量切换到备用跨环节点 C上来出环, 这种情况下的流量切换过程与图 5所示的切换过程相同。
如图 7所示, 本实施方式的跨环业务的保护装置, 包括: 通道配置模块、 故障检测模块、 故障通告模块和保护切换模块, 其中:
通道配置模块设置为: 对具有相同跨环节点和目的节点的跨环业务, 在 经过的相同的环上为跨环业务配置共享的通道, 在经过的不同的环上为跨环 业务分别配置通道, 在跨环节点上, 进行环间通道的绑定, 指定主用跨环节 点和备用跨环节点, 并在每个跨环业务的上环节点和下环节点上为跨环业务 绑定通道;
故障检测模块设置为检测跨环业务所经过的环是否发生状态变化; 故障通告模块设置为在故障检测模块检测到状态变化时, 向环上节点通 告状态变化信息;
保护切换模块设置为在所经过的环发生状态变化时, 进行保护切换或回 切处理。
通道配置模块在跨环节点上, 通过如下方式进行环间通道的绑定: 将具 有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上的共享的通道 和经过的不同的环上的分别配置的通道, 绑定为一个通道。
通道配置模块在经过的相同的环上为跨环业务配置共享的通道是对具有 相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为跨环业务配置 共享的工作通道和保护通道。 保护切换模块是设置为通过如下方式进行保护切换或回切处理: 在状态 变化为发生故障, 且故障为影响工作通道的流量并需要进行主用跨环节点切 换的故障时, 将工作通道上的流量切换到保护通道上, 在保护通道上将流量 传输到备用跨环节点, 根据下一个环的故障情况, 在下一个环的工作通道或 保护通道上传输流量; 或者
在状态变化为发生故障, 且故障为影响工作通道的流量而不需要进行主 用跨环节点切换的故障时, 将跨环业务在工作通道上的流量切换到保护通道 上, 在保护通道上将流量传输到主用跨环节点。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。
以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。
工业实用性
本发明实施方式所提供的方法和装置, 能够避免针对每个跨环业务建立 对应的一个跨环保护路径, 降低了配置的复杂度; 另外, 对于环上具有相同 的单环上出环节点 (跨环节点)和目的节点的跨环业务, 可汇聚到共享的工 作通道或保护通道上传送, 减少了配置工作通道和保护通道的工作量。

Claims

权 利 要 求 书
1、 一种跨环业务的保护方法, 包括: 对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所 述跨环业务配置共享的通道, 在跨环节点上, 进行环间通道的绑定, 指定主 用跨环节点和备用跨环节点, 并在每个跨环业务的上环节点和下环节点上为 该跨环业务绑定通道; 以及
检测所述跨环业务所经过的环是否发生状态变化, 在发生状态变化时, 进行保护切换或回切处理。
2、 如权利要求 1所述的方法, 还包括:
对具有相同跨环节点和目的节点的跨环业务, 在经过的不同的环上为所 述跨环业务分别配置通道。
3、 如权利要求 2所述的方法, 其中, 在跨环节点上进行环间通道的绑定 的步骤包括:
将具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上的共 享的通道和经过的不同的环上的分别配置的通道, 绑定为一个通道。
4、 如权利要求 1所述的方法, 其中, 在经过的相同的环上为所述跨环业 务配置共享的通道的步骤包括:
对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所 述跨环业务配置共享的工作通道和保护通道。
5、 如权利要求 4所述的方法, 其中, 检测所述跨环业务所经过的环是否 发生状态变化的步骤包括:
通过故障检测报文检测所述跨环业务所经过的环是否发生状态变化, 如 果发生, 则向该环上的节点通告状态变化信息, 所述状态变化包括发生故障 和故障消失。
6、 如权利要求 5所述的方法, 其中, 在发生状态变化时进行保护切换或 回切处理的步骤包括: 收到所述状态变化信息的节点通过如下方式进行保护 切换或回切处理:
在所述状态变化为发生故障, 且故障为影响工作通道的流量并需要进行 主用跨环节点切换的故障时, 故障环内的节点将工作通道上的流量切换到保 护通道上, 在保护通道上将流量传输到备用跨环节点, 所述备用跨环节点根 据下一个环的故障情况, 在下一个环的工作通道或保护通道上传输流量。
7、 如权利要求 5所述的方法, 其中, 在发生状态变化时进行保护切换或 回切处理的步骤包括: 收到所述状态变化信息的节点通过如下方式进行保护 切换或回切处理:
在所述状态变化为发生故障, 且故障为影响工作通道的流量而不需要进 行主用跨环节点切换的故障时, 故障环内的节点将所述跨环业务在工作通道 上的流量切换到保护通道上, 在保护通道上将流量传输到主用跨环节点。
8、 一种跨环业务的保护装置, 包括通道配置模块、 故障检测模块、 故障 通告模块和保护切换模块, 其中:
所述通道配置模块设置为:对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所述跨环业务配置共享的通道, 在跨环节点上, 进行 环间通道的绑定, 指定主用跨环节点和备用跨环节点, 并在每个跨环业务的 上环节点和下环节点上为所述跨环业务绑定通道;
所述故障检测模块设置为检测所述跨环业务所经过的环是否发生状态变 化;
所述故障通告模块设置为在故障检测模块检测到状态变化时, 向环上节 点通告状态变化信息;
所述保护切换模块设置为在所经过的环发生状态变化时, 进行保护切换 或回切处理。
9、 如权利要求 8所述的装置, 其中,
所述通道配置模块还设置为对具有相同跨环节点和目的节点的跨环业 务, 在经过的不同的环上为所述跨环业务分别配置通道。
10、 如权利要求 9所述的装置, 其中,
所述通道配置模块是设置为通过如下方式进行环间通道的绑定: 将具有 相同跨环节点和目的节点的跨环业务, 在经过的相同的环上的共享的通道和 经过的不同的环上的分别配置的通道, 绑定为一个通道。
11、 如权利要求 8所述的装置, 其中,
所述通道配置模块是设置为通过如下方式为所述跨环业务配置共享的通 道: 对具有相同跨环节点和目的节点的跨环业务, 在经过的相同的环上为所 述跨环业务配置共享的工作通道和保护通道。
12、 如权利要求 11所述的装置, 其中,
所述保护切换模块是设置为通过如下方式进行保护切换或回切处理: 在 所述状态变化为发生故障, 且故障为影响工作通道的流量并需要进行主用跨 环节点切换的故障时, 将工作通道上的流量切换到保护通道上, 在保护通道 上将流量传输到备用跨环节点, 根据下一个环的故障情况, 在下一个环的工 作通道或保护通道上传输流量。
13、 如权利要求 11所述的装置, 其中,
所述保护切换模块是设置为通过如下方式进行保护切换或回切处理: 在 所述状态变化为发生故障, 且故障为影响工作通道的流量而不需要进行主用 跨环节点切换的故障时, 将所述跨环业务在工作通道上的流量切换到保护通 道上, 在保护通道上将流量传输到主用跨环节点。
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