WO2015180294A1 - 一种链路聚合端口的信号劣化触发保护切换的方法及装置 - Google Patents

一种链路聚合端口的信号劣化触发保护切换的方法及装置 Download PDF

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Publication number
WO2015180294A1
WO2015180294A1 PCT/CN2014/086557 CN2014086557W WO2015180294A1 WO 2015180294 A1 WO2015180294 A1 WO 2015180294A1 CN 2014086557 W CN2014086557 W CN 2014086557W WO 2015180294 A1 WO2015180294 A1 WO 2015180294A1
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link aggregation
port
aggregation port
signal degradation
state
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PCT/CN2014/086557
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English (en)
French (fr)
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马飞
刘道峰
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中兴通讯股份有限公司
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Priority to EP14893102.5A priority Critical patent/EP3151491B1/en
Priority to US15/313,848 priority patent/US10205629B2/en
Publication of WO2015180294A1 publication Critical patent/WO2015180294A1/zh

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    • 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
    • H04L45/24—Multipath
    • H04L45/245—Link aggregation, e.g. trunking
    • 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
    • H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • 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]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5625—Operations, administration and maintenance [OAM]
    • H04L2012/5627—Fault tolerance and recovery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for triggering protection switching of SD (Signal Degradation) of a link aggregation port.
  • SD Synignal Degradation
  • the PTN network refers to a packet transport network, which is based on packet switching and connection-oriented multi-service unified transmission technology. It not only can better carry carrier-class Ethernet services, but also meets service standardization, high reliability, flexible scalability, and strict service quality. (QoS) and complete operational management and maintenance (OAM) and other five basic attributes, and take into account the traditional time division multiplexing (TDM) and asynchronous transfer mode (ATM) services, inheriting the graphical interface of the synchronous digital system (SDH) network management Management functions such as end-to-end configuration.
  • QoS quality of service
  • OFAM operational management and maintenance
  • TDM time division multiplexing
  • ATM asynchronous transfer mode
  • SDH synchronous digital system
  • the PTN network is divided into three layers, namely, a PTN virtual channel (VC) layer network, a PTN virtual path (VP) layer network, and a PTN virtual segment (VS) layer network.
  • the bottom layer of the PTN is a physical medium layer network, such as a fiber link, etc.
  • the VC layer of the PTN is a pseudowire (PW) layer
  • the VP layer is a label switched path (LSP) layer.
  • the PTN network has OAM capability and network protection mechanism: it is mainly divided into OAM module and protection switching module.
  • the OAM module is applicable to the virtual segment (TMS) layer/virtual channel (TMP) layer/virtual path (TMC) layer. Severely send OAM packets to detect faults, notify the protection switch module, and protect the switch module from active/standby switchover to protect services.
  • TMS virtual segment
  • TMP virtual channel
  • TMC virtual path
  • the OAM module detection feature can realize the convergence of services within 50MS and meet the carrier-class handover performance requirements.
  • a switching device that carries a carrier-class Ethernet service may experience optical path degradation in physical media that carries services such as optical fibers. This may result in continuous packet loss of service traffic.
  • the OAM module can detect the optical path attenuation and report the fault to the TMS layer/TMP layer/TMC layer, and notify the protection switching module to perform protection switching of the service.
  • the specific implementation process is as follows: the link layer generates a signal to degrade its physical medium port. The signal is degraded and notified to the TMS layer.
  • the TMS layer reports the signal degradation status to the TMP layer through the OAM module.
  • the TMP layer can also report the status to the TMC for layer-by-layer fault reporting.
  • the protection switching module sends a status.
  • the protection switching of the service at the TMP layer or the TMC layer is implemented for the signal degradation packet.
  • the switching device that carries the carrier-class Ethernet service can only support the detection notification switching of the network-side outlet as a physical port signal degradation state.
  • the present invention provides a method and apparatus for signal degradation trigger protection switching of a link aggregation port that overcomes the above technical problems or at least partially solves the above technical problems, and implements a signal degradation state detection notification of a link aggregation port. Switch.
  • a method for signal degradation triggering protection switching of a link aggregation port comprising: obtaining member port status information of a link aggregation port from a status register of a link aggregation port; Obtaining the member port status information, obtaining the value X of the signal degradation optical path attenuation in the member ports of the link aggregation port; comparing the number X of the signal degradation optical path attenuation generated in the member ports of the link aggregation port with a predetermined threshold If the value of the signal degradation of the optical path attenuation in the member port of the link aggregation port is greater than the predetermined threshold, set the status of all the member ports of the link aggregation port to the signal degradation state, and notify the virtual segment to report the fault for service protection. Switch to the alternate link.
  • the method further includes: determining whether the network side egress port is a link aggregation port; if the network side The egress port is a link aggregation port, and the step of obtaining the member port status information of the link aggregation port from the status register of the link aggregation port.
  • the method further includes: when the quantity value X of the signal degradation optical path attenuation in the member port of the link aggregation port is less than or equal to the predetermined threshold, setting the X member port states that generate the signal degradation optical path attenuation to Inactive state.
  • the step of notifying the virtual segment layer to perform the service protection switching process includes: the virtual segment layer reporting the signal degradation state to the virtual channel layer or the virtual channel layer by using the OAM module, and protecting the switching module from transmitting the signal to the signal degradation state. Switching packets to perform protection switching between the virtual path layer or the virtual channel layer.
  • the method further includes: setting a state of all member ports of the link aggregation port to an active state; and obtaining a member port of the link aggregation port.
  • the quantity value X of the signal degradation optical path attenuation is compared with a predetermined threshold; when the number X of signal degradation optical path attenuation in the member port of the link aggregation port is less than or equal to the predetermined threshold, the notification is made under the link aggregation port.
  • the signal degradation is cleared, the sham segment signal degradation alarm is eliminated, and the imaginary segment layer notifies the virtual channel layer or the virtual channel layer to clear the signal degradation state, and the service is switched back to the primary link by the standby link.
  • the predetermined threshold is a difference between a number of member ports M in the link aggregation port and a number N of reserved bandwidths of the link aggregation port.
  • a device for signal degradation triggering protection switching of a link aggregation port comprising:
  • the first obtaining module is configured to obtain the member port status information of the link aggregation port from the status register of the link aggregation port
  • the second obtaining module is configured to obtain the member port of the link aggregation port according to the obtained member port status information.
  • a quantity value X of the signal degradation optical path attenuation is generated; the comparison module is configured to compare the quantity value X of the signal degradation optical path attenuation in the member port of the link aggregation port with a predetermined threshold; and the protection switching trigger module is set to be a chain When the value of the signal degradation optical path attenuation in the member port of the aggregation port is greater than the predetermined threshold, the status of all member ports of the link aggregation port is set to the signal degradation state, and the virtual segment is notified to report the fault and the service protection is switched to the standby state. On the link.
  • the device further includes: a determining module, configured to determine whether the network side outgoing port is a link aggregation port; and if the network side outgoing port is a link aggregation port, triggering the first acquiring module.
  • a determining module configured to determine whether the network side outgoing port is a link aggregation port; and if the network side outgoing port is a link aggregation port, triggering the first acquiring module.
  • the device further includes: a state setting module, configured to generate a signal degradation optical path attenuation X when the number X of signal degradation optical path attenuation in the member port of the link aggregation port is less than or equal to the predetermined threshold Member port status is set to inactive.
  • a state setting module configured to generate a signal degradation optical path attenuation X when the number X of signal degradation optical path attenuation in the member port of the link aggregation port is less than or equal to the predetermined threshold Member port status is set to inactive.
  • the state setting module is further configured to: after the signal degradation of the member ports of the link aggregation port is eliminated, set a state of all member ports of the link aggregation port to an active state; the comparison module is further configured to Comparing the quantity value X of the signal degradation optical path attenuation in the member port of the link aggregation port with a predetermined threshold; the apparatus further includes: a switchback triggering module, configured to generate signal degradation in the member ports of the link aggregation port When the value X of the optical path attenuation is less than or equal to the predetermined threshold, the signal degradation of the link aggregation port is cleared, the virtual segment layer signal degradation alarm is cleared, and the virtual segment layer notifies the virtual channel layer or the virtual channel layer to clear the signal degradation state. The service is switched back to the primary link by the alternate link.
  • the predetermined threshold is a difference between a number of member ports M in the link aggregation port and a number N of reserved bandwidths of the link aggregation port.
  • the beneficial effect of the present invention is that when the number X of signal degradation optical path attenuation generated in the member ports of the link aggregation port is greater than a predetermined threshold, all member port states of the link aggregation port are set to a signal degradation state, and the virtual segment is notified. When the fault is reported, the service protection is switched to the standby link. This ensures that the Ethernet service exits the protection switching of the service when the SD optical port is generated on the link aggregation port to ensure the switching performance of the carrier-class.
  • FIG. 1 is a flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port according to an embodiment of the present invention
  • FIG. 2 is a second flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port according to an embodiment of the present invention
  • FIG. 3 is a third flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port according to an embodiment of the present invention
  • FIG. 4 is a fourth flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a service failback in an embodiment of the present invention.
  • FIG. 6 is a second flowchart of a service failback in an embodiment of the present invention.
  • FIG. 7 is a block diagram of a device for signal degradation trigger protection switching of a link aggregation port according to an embodiment of the present invention.
  • the embodiment of the present invention can be applied to a switching device supporting a carrier-class Ethernet service in a PTN network, and is applied to a scenario in which the egress of the main link of the Ethernet service is a link aggregation port, and of course, it can be understood that the present invention
  • the embodiment of the steps of the following methods is not limited in the embodiment.
  • FIG. 1 is a flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port according to an embodiment of the present invention, and the specific steps are as follows:
  • Step S101 Obtain member port state information of the link aggregation port from a status register of the link aggregation port.
  • a status register may be set for the link aggregation port to record the status of the member port, such as the SD status, SF (Signal Fail) status, UP status, and DOWN status. State, etc., port state switching can also be recorded in the status register; in addition, a querier can be set to query the status of the member ports in the link aggregation port according to a predetermined time (for example, every 1 second), and the result of the query The status register is written. When a new member of the link aggregation port is added or removed, the querier clears the reset. When the status of the member port changes to the UP state and the DOWN state, the querier clears the reset.
  • Step S103 Obtain a quantity value X of the signal degradation optical path attenuation generated in the member port of the link aggregation port according to the obtained member port state information.
  • the number of signal degradation optical path attenuations generated in the member ports of the link aggregation port in the status register is obtained, and the quantity value X is obtained.
  • Step S105 Compare the quantity value X of the signal degradation optical path attenuation generated in the member port of the link aggregation port with a predetermined threshold.
  • the predetermined threshold is a difference between the number of member ports M in the link aggregation port and the number N of reserved bandwidths of the link aggregation port.
  • Step S107 When the number X of signal degradation optical path attenuation generated in the member ports of the link aggregation port is greater than a predetermined threshold, set all member port states of the link aggregation port to a signal degradation state, and notify the TMS layer to report the fault to perform the service. Protection is switched to the alternate link.
  • the VC layer is called a TMC layer
  • the VP layer is called a TMP layer
  • the VS layer is called a TMS layer
  • the physical medium layer is called a link layer; the four hierarchical structures are the link layer from the bottom layer. /TMS layer/TMP layer/TMC layer.
  • the TMS layer reports the signal degradation status to the TMP layer or the TMC layer through the OAM module, and the protection switching module transmits the switching message with the signal degradation status to perform protection switching of the TMP layer or the TMC.
  • the protection switching of the service is implemented when the Ethernet service egress is a signal degradation optical path attenuation on the link aggregation port, and the handover performance of the carrier level is ensured by the foregoing steps S101 to S107.
  • a flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port is different from the method shown in FIG. 1, before the step S101, the method further include:
  • Step S109 Determine whether the network side outgoing port is a link aggregation port; if the network side outgoing port is a link aggregation port, go to step S101; if the network side outgoing port is a physical port, go to step S111.
  • step S111 the signal degradation reporting switching protection process is performed according to the prior art, and will not be described here.
  • a third flowchart of a method for triggering protection switching of a signal degradation of a link aggregation port is different from the method shown in FIG. 2, after the step S105, the method further includes :
  • Step S113 When the number X of signal degradation optical path attenuation generated in the member ports of the link aggregation port is less than or equal to a predetermined threshold, and greater than zero, the X member port states that generate signal degradation optical path attenuation are set to inactive. status.
  • Step S401 Perform a port type judgment on a network side exit of the Ethernet service.
  • Step S403 If the normal physical port performs OAM detection according to the prior art, the fault notification protection switching module is detected to perform protection switching back-off of the service.
  • Step S405 If it is a link aggregation port, obtain the status information of the member port from the status register of the aggregation port, and when the number X of the SD light fading is generated in the member port, and satisfy the value of 0 ⁇ X ⁇ M-N, the X members are The port status is set to inactive and no traffic is forwarded.
  • Step S407 When the number X of the SD optical fading is generated in the member port and the X>M-N is satisfied, the entire port state of the aggregation port is set to the SD state to notify the TMS layer.
  • step S409 the TMS layer reports the SD status to the TMP or TMC layer, and the protection switching module performs protection switching of the TMP or TMC layer.
  • step S411 after the SD optical attenuation of the member port is removed, the aggregation port re-sets its state to active, and when the condition of 0 ⁇ X ⁇ M-N is satisfied again, the SD state on the aggregation port is cleared.
  • step S413 the SD state of the aggregation port is cleared, and the SD alarm of the TMS layer is cleared, and the TMP or the TMC layer is notified to perform the service protection switchback.
  • the above-mentioned steps S401 to S411 are used to solve the protection switching back-off of the service when the Ethernet service exit is a signal degradation optical path attenuation on the link aggregation port, and the handover performance of the carrier level is ensured.
  • FIG. 5 it is one of the flowcharts of the service back-cutting schematic diagram in the embodiment of the present invention, and the specific steps are as follows:
  • step S501 the signal degradation of the member ports of the link aggregation port is eliminated.
  • Step S503 Set the state of all member ports of the link aggregation port to an active state.
  • Step S505 Comparing the quantity value X of the signal degradation optical path attenuation generated in the member port of the link aggregation port with a predetermined threshold.
  • Step S507 When the number X of signal degradation optical path attenuation generated in the member ports of the link aggregation port is less than or equal to a predetermined threshold, the signal degradation under the link aggregation port is cleared, the TMS layer signal degradation alarm is eliminated, and the TMS layer notifies the TMP layer. Or the TMC layer clears the signal degradation state, and the service is switched back to the primary link by the standby link.
  • FIG. 6 it is the second flowchart of the service failback in the embodiment of the present invention, and the specific steps are as follows:
  • Step S601 The network side exit of the Ethernet service is an SG (Signaling Gateway) port, and the number of the member ports is 1.
  • the signal degradation status of the member port is directly mapped to the aggregation port, and the TMS layer is notified to report to the TMP or the TMC layer. Perform protection switching back.
  • Step S603 when the number value X of the signal degradation optical path attenuation is generated in the member port, and when 0 ⁇ X ⁇ M-N is satisfied, the X member port states are inactive (inactive) state, and no traffic forwarding is performed; wherein, M Indicates the number of member ports in the link aggregation port. N indicates the number of reserved bandwidths on the link aggregation port.
  • Step S605 When the number X of the signal degradation optical path attenuation is generated in the member port, when X>M-N is satisfied, the entire port state of the link aggregation port is set to a signal degradation state to notify the TMS layer;
  • Step S607 The TMS layer reports the signal degradation status to the TMP or TMC layer, and the protection switching module performs protection switching of the TMP or TMC layer.
  • Step S609 After the signal degradation light attenuation of the member port is removed, the link aggregation port re-sets its state to an active state, and when the member port generates a signal-degraded light attenuation quantity value X, it satisfies 0 ⁇ X ⁇ In the M-N condition, the signal degradation state on the link aggregation port is cleared.
  • step S611 the signal degradation state on the link aggregation port is cleared, and the signal degradation alarm of the TMS layer is cleared, and the TMP or the TMC layer is notified to perform the service protection switchback.
  • an apparatus for signal degradation triggering protection switching of a link aggregation port is provided. As shown in FIG. 7, the apparatus 700 includes:
  • the first obtaining module 701 is configured to obtain, according to a status register of the link aggregation port, member port status information of the link aggregation port;
  • the second obtaining module 703 is configured to obtain, according to the obtained member port state information, a quantity value X of the signal degradation optical path attenuation generated in the member port of the link aggregation port;
  • the comparison module 705 is configured to compare the quantity value X of the signal degradation optical path attenuation in the member port of the link aggregation port with a predetermined threshold;
  • the protection switching triggering module 707 is configured to set all the member port states of the link aggregation port to a signal degradation state and notify the virtual state when the number X of signal degradation optical path attenuation generated in the member ports of the link aggregation port is greater than a predetermined threshold.
  • the segment layer reports a fault and performs service protection switching to the standby link, where the predetermined threshold is the difference between the number of member ports M in the link aggregation port and the number N of reserved bandwidths of the link aggregation port.
  • the apparatus 700 further includes:
  • the determining module is configured to determine whether the network side outgoing port is a link aggregation port; if the network side outgoing port is a link aggregation port, triggering the first acquiring module.
  • the apparatus 700 further includes:
  • the state setting module is configured to set the state of the X member ports that generate the signal degradation optical path attenuation to an inactive state when the number X of signal degradation optical path attenuation generated in the member ports of the link aggregation port is less than or equal to the predetermined threshold .
  • the state setting module is further configured to set the state of all member ports of the link aggregation port to an active state after the signal degradation of the member ports of the link aggregation port is eliminated.
  • the comparison module is further configured to compare the quantity value X of the signal degradation optical path attenuation in the member port of the link aggregation port with a predetermined threshold;
  • the device 700 further includes:
  • the failover triggering module is configured to notify that the signal degradation under the link aggregation port is cleared when the number X of signal degradation optical path attenuation in the member port of the link aggregation port is less than or equal to the predetermined threshold, and the virtual segment layer is The number deterioration alarm is eliminated, and the virtual segment layer notifies the virtual path layer or the virtual channel layer to clear the signal degradation state, and the service is switched back to the primary link by the standby link.
  • the foregoing embodiment and the preferred embodiment implement the protection switching back-off of the service when the Ethernet service exits the SD optical port on the link aggregation port to ensure the switching performance of the carrier-class.

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Abstract

本发明的实施例公开了一种链路聚合端口的信号劣化触发保护切换的方法及装置，其中方法包括：从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息；根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X；将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上，实现了以太网业务出口为链路聚合端口上产生SD光衰时实现业务的保护切换回切，保证电信级的切换性能。

Description

一种链路聚合端口的信号劣化触发保护切换的方法及装置 技术领域
本发明涉及通信技术领域，尤其涉及一种链路聚合端口的SD(Signal Degrade，信号劣化)触发保护切换的方法及装置。
背景技术
PTN网络是指分组传送网，该网络是基于分组交换、面向连接的多业务统一传送技术，不仅能较好承载电信级以太网业务，满足业务标准化、高可靠性、灵活扩展性、严格服务质量(QoS)和完善的运行管理维护(OAM)等5个基本属性，而且兼顾了支持传统时分复用(TDM)和异步传输模式(ATM)业务，继承同步数字体系(SDH)网管的图形化界面、端到端配置等管理功能。
PTN网络分为三个层次，分别是PTN虚通道(VC)层网络、PTN虚通路(VP)层网络和PTN虚段(VS)层网络。PTN的底层是物理媒介层网络，如光纤链路等等；对于MPLS-TP技术，PTN的VC层即伪线(PW)层，VP层即标记交换路径(LSP)层。
PTN网络具备OAM能力和网络保护机制：主要分为OAM模块和保护切换模块，OAM模块适用于虚段(TMS)层/虚通道(TMP)层/虚通路(TMC)层三个层次，通过周期性发送OAM报文分层进行故障的检测，通知保护切换模块，保护切换模块进行主备切换，从而实现对业务的保护。OAM模块检测特点能够实现业务在50MS以内的切换收敛，满足电信级的切换性能要求。
承载电信级以太网业务的交换设备会遇到光纤等承载业务的物理介质出现光路衰减现象，这样会导致业务流量出现持续丢包。OAM模块可以检测到这种光路衰减且将故障上报到TMS层/TMP层/TMC层，通知保护切换模块进行业务的保护切换；具体实现过程如下：链路层产生信号劣化其物理介质端口就会被置为信号劣化状态并且通知TMS层，TMS层通过OAM模块将该信号劣化状态上报到TMP层，TMP层亦可将该状态上报至TMC，进行逐层的故障上报；保护切换模块发送一个状态为信号劣化的切换报文实现业务在TMP层或者TMC层的保护切换。
然而，目前承载电信级以太网业务的交换设备上只能支持网络侧出口为一个物理端口信号劣化状态的检测通知切换。
发明内容
鉴于上述技术问题，本发明提供了一种克服上述技术问题或者至少部分地解决上述技术问题的链路聚合端口的信号劣化触发保护切换的方法及装置，实现链路聚合端口的信号劣化状态检测通知切换。
依据本发明的一个方面，提供了一种链路聚合端口的信号劣化触发保护切换的方法，所述方法包括：从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息；根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X；将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上。
可选地，从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息的步骤之前，所述方法还包括：判断网络侧出端口是否为链路聚合端口；如果所述网络侧出端口是链路聚合端口，则进入从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息的步骤。
可选地，所述方法还包括：当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，将产生信号劣化光路衰减的X个成员端口状态设置为不活动的状态。
可选地，所述通知虚段层进行业务保护切换处理的步骤包括：所述虚段层通过OAM模块将信号劣化状态上报到虚通路层或虚通道层，保护切换模块发送状态为信号劣化的切换报文进行虚通路层或虚通道层的保护切换。
可选地，当链路聚合端口的成员端口的信号劣化消除之后，所述方法还包括：将链路聚合端口的所有成员端口的状态设置为活动的状态；将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，通知将链路聚合端口下的信号劣化清除，虚段层信号劣化告警消除，虚段层通知虚通路层或者虚通道层清除信号劣化状态，业务由备用链路回切到主链路上。
可选地，所述预定阈值为链路聚合端口中成员端口数M与链路聚合端口预留带宽数N之间的差值。
依据本发明的另一个方面，还提供了一种链路聚合端口的信号劣化触发保护切换的装置，所述装置包括：
第一获取模块，设置为从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息；第二获取模块，设置为根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X；比较模块，设置为将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；保护切换触发模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上。
可选地，所述装置还包括：判断模块，设置为判断网络侧出端口是否为链路聚合端口；如果所述网络侧出端口是链路聚合端口，则触发所述第一获取模块。
可选地，所述装置还包括：状态设置模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，将产生信号劣化光路衰减的X个成员端口状态设置为不活动的状态。
可选地，所述状态设置模块还设置为当链路聚合端口的成员端口的信号劣化消除之后，将链路聚合端口的所有成员端口的状态设置为活动的状态；所述比较模块还设置为将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；所述装置还包括：回切触发模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，通知将链路聚合端口下的信号劣化清除，虚段层信号劣化告警消除，虚段层通知虚通路层或者虚通道层清除信号劣化状态，业务由备用链路回切到主链路上。
可选地，所述预定阈值为链路聚合端口中成员端口数M与链路聚合端口预留带宽数N之间的差值。
本发明的有益效果是：在链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上，由此实现了以太网业务出口为链路聚合端口上产生SD光衰时实现业务的保护切换回切，保证电信级的切换性能。
附图说明
图1为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之一；
图2为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之二；
图3为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之三；
图4为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之四；
图5为本发明的实施例中业务回切的流程图之一；
图6为本发明的实施例中业务回切的流程图之二；以及
图7为本发明的实施例中链路聚合端口的信号劣化触发保护切换的装置框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本发明的实施例可以运用于PTN网络中支持电信级以太网业务的交换设备，应用于以太网业务主链路网络侧出口为链路聚合端口的场景中，当然可以理解的是，在本发明的实施例中并不限定下述方法各个步骤的执行主体。
如图1所示，为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之一，具体步骤如下：
步骤S101、从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息。
在本发明的实施例中，可以为链路聚合端口设置一个状态寄存器，用于记录成员端口的状态，例如SD状态，SF(Signal Fail，信号失效)状态，UP状态和DOWN状 态等，端口状态的切换也可以记录在状态寄存器中；另外可以设置一个查询器，按照预定的时间(例如每1秒)对链路聚合端口中的成员端口状态进行查询，并将查询的结果写入状态寄存器，当链路聚合端口有新成员加入和移出，该查询器会清零重置；当成员端口状态有UP状态和DOWN状态变化时，该查询器会清零重置。
步骤S103、根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X。
具体地，在状态寄存器中统计链路聚合端口的成员端口中产生信号劣化光路衰减的数量，得到数量值X。
步骤S105、将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较。
可选地，预定阈值为链路聚合端口中成员端口数M与链路聚合端口预留带宽数N之间的差值。
步骤S107、当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知TMS层上报故障进行业务保护切换到备用链路上。
在本发明的实施例中，将VC层称为TMC层，VP层称为TMP层，VS层称为TMS层，物理媒介层称为链路层；四个层次结构从底层依次为链路层/TMS层/TMP层/TMC层。
具体地，在本发明的实施例中，TMS层通过OAM模块将信号劣化状态上报到TMP层或TMC层，保护切换模块发送状态为信号劣化的切换报文进行TMP层或TMC的保护切换。
在本发明的实施例中，通过上述步骤S101～步骤S107解决了以太网业务出口为链路聚合端口上产生信号劣化光路衰减时实现业务的保护切换，保证电信级的切换性能。
如图2所示，为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之二，与图1中所示的方法不同的是，在步骤S101之前，方法还包括：
步骤S109、判断网络侧出端口是否为链路聚合端口；如果网络侧出端口是链路聚合端口，则进入步骤S101；如果网络侧出端口是物理端口，进入步骤S111。在步骤S111中，按照现有技术进行信号劣化上报切换保护处理，在此不再敷述。
如图3所示，为本发明的实施例中链路聚合端口的信号劣化触发保护切换的方法的流程图之三，与图2所示的方法不同的是，在步骤S105之后，方法还包括：
步骤S113、当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于预定阈值，且大于零时，将产生信号劣化光路衰减的X个成员端口状态设置为不活动(inactive)的状态。
在本发明的实施中考虑三种异常情况：第一种情况：若M＝N，即M－N＝0时，X值为1，则将链路聚合端口的端口状态置为信号劣化状态，通知TMS层进行业务保护切换；第二种情况当X＝0即无信号劣化异常，链路聚合端口转发走正常流量；第三种情况当产生信号劣化的成员端口信号劣化光衰消失时不再重新置为UP状态，不再参与链路聚合端口的转发，因为链路聚合端口中有新的成员端口UP后重新参与计算的话会影响到业务的流量，导致因重新计算而带来的业务丢包，所以在运用该技术前务必考虑好带宽N值的设置。
下面结合图4详细介绍一下本发明的实施例中的链路聚合端口的信号劣化触发保护切换的流程，具体步骤如下：
步骤S401、对以太网业务的网络侧出口进行端口类型的判断。
步骤S403、如果是普通物理端口按照已有技术执行OAM检测，检测到故障通知保护切换模块进行业务的保护切换回切。
步骤S405、如果是链路聚合端口，从聚合端口的状态寄存器中获取成员端口状态信息，当成员端口中产生SD光衰的数量值X，满足0<X≤M－N时，将X个成员端口状态置inactive(不活动)状态，不进行流量转发。
步骤S407、当成员端口中产生SD光衰的数量值X，满足X>M－N时，将聚合端口整个端口状态置为SD状态通知TMS层。
步骤S409、TMS层将SD状态上报到TMP或者TMC层，保护切换模块进行TMP或者TMC层的保护切换。
步骤S411、成员端口下的SD光衰消除后，聚合端口将其状态重新置为active，当重新满足0<X≤M－N条件时，将聚合端口上的SD状态清除。
步骤S413、聚合端口上的SD状态清除，TMS层的SD告警清除，通知TMP或者TMC层进行业务保护的回切。
在本发明的实施例中，通过上述步骤S401～步骤S411解决了以太网业务出口为链路聚合端口上产生信号劣化光路衰减时实现业务的保护切换回切，保证电信级的切换性能。
如图5所示，为本发明的实施例中业务回切示意图的流程图之一，具体步骤如下：
步骤S501、链路聚合端口的成员端口的信号劣化消除。
步骤S503、将链路聚合端口的所有成员端口的状态设置为活动的状态。
步骤S505、将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较。
步骤S507、当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于预定阈值时，将链路聚合端口下的信号劣化清除，TMS层信号劣化告警消除，TMS层通知TMP层或者TMC层清除信号劣化状态，业务由备用链路回切到主链路上。
如图6所示，为本发明的实施例中业务回切的流程图之二，具体步骤如下：
步骤S601、以太网业务的网络侧出口为SG(信令网关)端口且其成员端口数量为1，该成员端口的信号劣化状态直接映射到聚合端口，通知TMS层上报至TMP或者TMC层，业务进行保护切换回切。
步骤S603、当成员端口中产生信号劣化光路衰减的数量值X，满足0<X≤M－N时，将X个成员端口状态置inactive(不活动)状态，并不进行流量转发；其中，M表示：链路聚合端口中成员端口数，N表示链路聚合端口预留带宽数。
步骤S605、当成员端口中产生信号劣化光路衰减的数量值X，满足X>M－N时，将链路聚合端口整个端口状态置为信号劣化状态通知TMS层；
步骤S607、TMS层将信号劣化状态上报到TMP或者TMC层，保护切换模块进行TMP或者TMC层的保护切换。
步骤S609、成员端口下的信号劣化光衰消除后，链路聚合端口将其状态重新置为active(活动)状态，当成员端口中产生信号劣化光衰的数量值X，重新满足0<X≤M－N条件时，将链路聚合端口上的信号劣化状态清除。
步骤S611、链路聚合端口上的信号劣化状态清除，TMS层的信号劣化告警清除，通知TMP或者TMC层进行业务保护的回切。
依据本发明的实施例的另一个方面，提供给了一种链路聚合端口的信号劣化触发保护切换的装置。如图7所示，装置700包括：
第一获取模块701，设置为从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息；
第二获取模块703，设置为根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X；
比较模块705，设置为将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；
保护切换触发模块707，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上，其中预定阈值为链路聚合端口中成员端口数M与链路聚合端口预留带宽数N之间的差值。
可选地，在本发明的另一个实施例中，装置700还包括：
判断模块，设置为判断网络侧出端口是否为链路聚合端口；如果所述网络侧出端口是链路聚合端口，则触发所述第一获取模块。
可选地，在本发明的另一个实施例中，装置700还包括：
状态设置模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，将产生信号劣化光路衰减的X个成员端口状态设置为不活动的状态。
可选地，在本发明的另一个实施例中，状态设置模块还设置为当链路聚合端口的成员端口的信号劣化消除之后，将链路聚合端口的所有成员端口的状态设置为活动的状态；
所述比较模块还设置为将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；
其中，装置700还包括：
回切触发模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，通知将链路聚合端口下的信号劣化清除，虚段层信 号劣化告警消除，虚段层通知虚通路层或者虚通道层清除信号劣化状态，业务由备用链路回切到主链路上。
以上所述的是本发明的优选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本发明所述的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本发明的保护范围内。
工业实用性
如上所述，通过上述实施例及优选实施方式，实现了以太网业务出口为链路聚合端口上产生SD光衰时实现业务的保护切换回切，保证电信级的切换性能。

Claims (11)

  1. 一种链路聚合端口的信号劣化触发保护切换的方法，所述方法包括：
    从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息；
    根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X；
    将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；
    当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上。
  2. 根据权利要求1所述的方法，其中，从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息的步骤之前，所述方法还包括：
    判断网络侧出端口是否为链路聚合端口；
    如果所述网络侧出端口是链路聚合端口，则进入从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息的步骤。
  3. 根据权利要求1或2所述的方法，其中，所述方法还包括：
    当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，将产生信号劣化光路衰减的X个成员端口状态设置为不活动的状态。
  4. 根据权利要求1所述的方法，其中，所述通知虚段层进行业务保护切换处理的步骤包括：所述虚段层通过OAM模块将信号劣化状态上报到虚通路层或虚通道层，保护切换模块发送状态为信号劣化的切换报文进行虚通路层或虚通道层的保护切换。
  5. 根据权利要求1所述的方法，其中，当链路聚合端口的成员端口的信号劣化消除之后，所述方法还包括：
    将链路聚合端口的所有成员端口的状态设置为活动的状态；
    将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；
    当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，通知将链路聚合端口下的信号劣化清除，虚段层信号劣化告警消除，虚段层通知虚通路层或者虚通道层清除信号劣化状态，业务由备用链路回切到主链路上。
  6. 根据权利要求1所述的方法，其中，所述预定阈值为链路聚合端口中成员端口数M与链路聚合端口预留带宽数N之间的差值。
  7. 一种链路聚合端口的信号劣化触发保护切换的装置，所述装置包括：
    第一获取模块，设置为从链路聚合端口的状态寄存器中获取链路聚合端口的成员端口状态信息；
    第二获取模块，设置为根据获取的成员端口状态信息，得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X；
    比较模块，设置为将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；
    保护切换触发模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X大于预定阈值时，将链路聚合端口的所有成员端口状态设置为信号劣化状态，并通知虚段层上报故障进行业务保护切换到备用链路上。
  8. 根据权利要求7所述的装置，其中，所述装置还包括：
    判断模块，设置为判断网络侧出端口是否为链路聚合端口；如果所述网络侧出端口是链路聚合端口，则触发所述第一获取模块。
  9. 根据权利要求7或8所述的装置，其中，所述装置还包括：
    状态设置模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，将产生信号劣化光路衰减的X个成员端口状态设置为不活动的状态。
  10. 根据权利要求7所述的装置，其中，所述状态设置模块还设置为当链路聚合端口的成员端口的信号劣化消除之后，将链路聚合端口的所有成员端口的状态设置为活动的状态；
    所述比较模块还设置为将得到链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X与预定阈值进行比较；
    所述装置还包括：
    回切触发模块，设置为当链路聚合端口的成员端口中产生信号劣化光路衰减的数量值X小于等于所述预定阈值时，通知将链路聚合端口下的信号劣化清除，虚段层信号劣化告警消除，虚段层通知虚通路层或者虚通道层清除信号劣化状态，业务由备用链路回切到主链路上。
  11. 根据权利要求7所述的装置，其中，所述预定阈值为链路聚合端口中成员端口数M与链路聚合端口预留带宽数N之间的差值。
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