WO2009046591A1 - Method for processing failure of slave port of master node in ethernet ring network system - Google Patents

Method for processing failure of slave port of master node in ethernet ring network system Download PDF

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Publication number
WO2009046591A1
WO2009046591A1 PCT/CN2007/003688 CN2007003688W WO2009046591A1 WO 2009046591 A1 WO2009046591 A1 WO 2009046591A1 CN 2007003688 W CN2007003688 W CN 2007003688W WO 2009046591 A1 WO2009046591 A1 WO 2009046591A1
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Prior art keywords
port
link
master node
node
slave port
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English (en)
French (fr)
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Shaoyong Wu
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ZTE Corp
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ZTE Corp
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Priority to EP07855718.8A priority Critical patent/EP2207307B1/en
Priority to PL07855718T priority patent/PL2207307T3/pl
Priority to US12/733,987 priority patent/US20100254257A1/en
Priority to ES07855718.8T priority patent/ES2455190T3/es
Publication of WO2009046591A1 publication Critical patent/WO2009046591A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/437—Ring fault isolation or reconfiguration
    • 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
    • H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0677—Localisation of faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • 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
    • H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning
    • 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]
    • H04L12/40—Bus networks
    • H04L12/40169—Flexible bus arrangements
    • H04L12/40176—Flexible bus arrangements involving redundancy
    • H04L12/40182—Flexible bus arrangements involving redundancy by using a plurality of communication lines

Definitions

  • the present invention relates to the field of Ethernet ring network automatic protection technology, and in particular, to a method for processing a slave port fault of a master node of an Ethernet ring network system.
  • the Ethernet ring protection system in RFC3619 is composed of multiple nodes connected to form a ring.
  • the ring can define multiple domains, namely the Ethernet ring protection domain.
  • a domain includes a primary node and a number of transit nodes, and a set of protected virtual local area networks (VLANs) for user data forwarding.
  • the two ports of the master node on the ring are respectively defined as The primary and secondary ports, the protected service VLAN is defined as the protection service VLAN.
  • the master node blocks the protection service VLAN forwarding function of the slave port. No loop occurs in the network to prevent the "broadcast storm" caused by the network loop.
  • the master node releases the slave node.
  • the port is protected by the service VLAN forwarding function. User data can pass through the slave port of the master node to ensure service connectivity.
  • FIG. 1 is a topology diagram of an Ethernet ring network automatic protection system in a normal operating state, which is composed of nodes S1, S2, S3, and S4.
  • An Ethernet ring protection domain is configured on the ring composed of the four nodes.
  • the master node (MASTER) is S2, and the remaining nodes S1, S3, and S4 are transit nodes (TRANSIT).
  • the two ring ports on the master node S2 are the master port and the slave port, respectively, where port 1 is the master port (P).
  • Port 1 is a slave port (S).
  • a protection service VLAN is defined in the domain, and each port on the ring is configured in the protection service VLAN.
  • the master node S2 blocks the slave port 1
  • the service VLAN data forwarding function is protected to prevent loops in the network and form a "network storm".
  • the master node S2 releases the data forwarding function of the protection service VLAN from the port 1, so that the service VLAN is in the service VLAN.
  • the data is reconnected, as shown in Figure 2.
  • Each node is detecting whether there is a fault on the link on the adjacent ring. If the link is found to be faulty, the link failure alarm message is sent to notify the link on the ring of the primary node that the link is faulty. After receiving the link fault alarm message, the master node releases the data forwarding function of the protection service VLAN of the slave port to make the service The data in the VLAN is reconnected.
  • the master node fails from the link corresponding to the port (that is, the link directly linked from the port)
  • the master node sends a link failure alarm message to the master node after detecting the link failure from the node at the opposite end of the port. Road failover, release the protection service VLAN data forwarding function of the slave port, as shown in Figure 3.
  • the link of the master node slave port is in a fault state and cannot forward data, but the slave port is set to the release state, so the port status is wrong.
  • the user when the user queries, the user will be misled. Because the port is in the open state, it means that the data can be transmitted, but the data cannot be transmitted in the released state.
  • the master node cannot detect the port fault from the port peer, and the master node slave port can detect the link fault.
  • the master node slave port is in the open state.
  • the master node is also in the open state of the slave port.
  • Ethernet ring protection methods such as patent EP1727313, have similar problems.
  • the technical problem to be solved by the present invention is to provide a method for processing a slave port fault of a master node of an Ethernet ring network system, which avoids a port state error when a link directly linked by a master node in an Ethernet ring domain fails.
  • the present invention provides a fault processing method for a master node slave port of an Ethernet ring network system, including the following steps:
  • the master node detects the state of the link directly linked from the port
  • the slave port If the link that the primary node directly links from the port fails, the slave port is placed in a blocked state; during the link failure, the slave port is blocked.
  • the master node detects the state of the slave link directly linked link by detecting the optical signal.
  • the master node does not detect the optical signal transmitted from the port direct link link, it is determined that the link directly linked from the port is faulty.
  • step (1) between the master node and the peer node of the direct link link
  • the state of the link is directly linked from the port by sending packets to each other.
  • the master node does not receive the detection packet sent by the peer node within a certain period of time, it is determined that the link directly linked from the port is faulty.
  • step (2) in the blocked state of the slave port, if the data of the protected virtual local area network is received at the blocked port, the data is discarded, and the protected virtual local area network is not sent and forwarded to the opposite node port. data.
  • Figure 1 is a top view of the Ethernet ring protection system when the link on the ring is normal;
  • FIG. 2 is a top view of a link failure on the ring of the Ethernet ring protection system
  • FIG. 3 is a topology diagram of a failure of a slave port of a master node of an Ethernet ring network protection system
  • FIG. 4 is a flowchart of a method for processing a slave port failure of a master node of an Ethernet ring network system according to the present invention. An example of an application instance where a slave link fails;
  • FIG. 6 is a diagram showing an application example of multiple faults on a link on a ring according to the present invention.
  • the idea of the present invention is that when the Ethernet ring master node detects that the link directly linked from the port fails, the slave port is blocked regardless of whether the state of the ring network before the slave port failure is intact or faulty. During the link failure, it remains blocked.
  • the method for processing a slave port failure of the master node of the Ethernet ring network system includes the following steps:
  • Step 401 The master node detects a link state directly linked from the port.
  • detection mechanisms that can detect link status, such as fiber optics that can detect optical signals, if If the detection is not detected, the link is faulty; or the peer node detects the packet with each other. If the detection packet sent by the peer node is not received within a certain period of time, the link is considered to be faulty.
  • Step 402 If the link that the primary node directly links from the port fails, the slave port is placed in a blocked state, that is, the protection service VLA forwarding function of the slave port is blocked, whether the ring state before the slave port failure is detected is intact or Failure; keeps the slave port blocked during the link failure of the primary node directly linked from the port.
  • the data of the protection VLAN is received on the blocked port, the data is discarded, and the data of the protection VLAN is not sent and forwarded to the peer node port.
  • the data can be transmitted for ring network protocol frames and the like.
  • an application example of the present invention there are three transmission nodes and one master node on the ring, and the master node fails from the port link, The slave port of the master node is placed in a blocking state, as shown in Figure 5. The other link fails again. The link fault alarm message is sent to the master node. The slave port of the master node is faulty and remains blocked from the slave port, as shown in Figure 6.
  • the processing method of the slave port fault of the master node of the Ethernet ring network system keeps the blocking state during the failure of the slave link of the master node to avoid the port state error when the master node slave port fails in the Ethernet ring domain, thereby avoiding user query. Misleading users and the possibility of a broadcast storm.
  • the invention can be used in a variety of Ethernet ring protection technologies.
  • the slave port In the method for processing a slave port failure of a master node of an Ethernet ring network system, when a link directly linked by a master node from a port fails, the slave port is placed in a blocked state and remains blocked during a link failure of the master node slave port. When the slave port of the Ethernet ring domain fails, the port status is incorrect. This prevents the user from misleading the user and causing broadcast storms.
  • the invention can be used in a variety of Ethernet ring protection techniques.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Small-Scale Networks (AREA)

Description

以太环网系统主节点从端口故障处理方法
技术领域
本发明涉及以太环网自动保护技术领域，尤其涉及一种以太环网系统主 节点从端口故障处理方法。
背景技术
RFC3619中的以太环网保护系统由多个节点相连构成环，环上可以定义 多个域， 即以太环网保护域。 一个域中包括了一个主节点和若干传输节点， 以及一组被保护的用于用户数据转发的业务虚拟局域网 （VLAN， Virtual Local Area Network ) ， 其中主节点在环上的两个端口分别定义为主端口和 从端口， 被保护的业务 VLAN定义为保护业务 VLAN。 当环上链路完好时 主节点阻塞从端口的保护业务 VLAN转发功能， 网络中无环路产生， 防止 了由于网络环路引起的 "广播风暴" ； 当链路发生故障时主节点放开从端口 的保护业务 VLAN转发功能， 用户数据可以在主节点的从端口通过， 保障 业务的连通。
如图 1是处于正常运行状态的以太环网自动保护系统的拓朴图，由节点 Sl、 S2、 S3和 S4组成， 在这四个节点组成的环上配置了一个以太环网保护 域， 域中的主节点 （MASTER )是 S2， 其余节点 Sl、 S3、 S4是传输节点 (TRANSIT)„主节点 S2的两个环上端口分别是主端口和从端口，其中端口 1 是主端口（P )， 端口 1是从端口（S )。 另外域中还定义了保护业务 VLAN, 环上每个端口都配置在保护业务 VLAN中。 当环上链路完好时， 主节点 S2 阻塞了从端口 1的保护业务 VLAN数据转发功能， 防止网络中存在环路， 形成 "网络风暴" ； 当环上链路出现故障时， 主节点 S2放开了从端口 1的 保护业务 VLAN数据转发功能， 使得业务 VLAN中的数据重新连通， 如图 2所示。
每个节点都在检测相邻的环上链路有无故障， 如果发现链路出现故障， 则发送链路故障告警消息通知主节点环上链路出现故障。主节点收到链路故 障告警消息后， 放开从端口的保护业务 VLAN数据转发功能， 使得业务 VLAN中的数据重新连通。 当主节点从端口对应的链路 (即从端口直接链接 的链路）发生故障时， 主节点从端口对端的节点检测到链路故障后， 发送链 路故障告警消息通知主节点， 主节点进行链路故障切换，放开从端口的保护 业务 VLAN数据转发功能， 如图 3所示。 主节点从端口的链路处于故障状 态， 不能转发数据， 但从端口却置为放开状态， 因此端口状态是错误的。
上述端口状态错误会导致如下问题：
第一， 用户查询时， 会误导用户， 因为端口为放开状态， 就意味着可以 传输数据， 但是目前在放开状态下不能传输数据；
第二， 如'果链路单通后， 主节点从端口对端不能检测到端口故障， 而主 节点从端口可以检测到链路故障，这种情况下， 主节点从端口如果为放开状 态，主节点从端口对端也为放开状态，则在链路恢复时，环上没有端口阻塞， 会产生瞬间环路， 引起广播风暴。
其他以太环网保护方法， 如专利 EP1727313, 也存在相似问题 发明内容
本发明要解决的技术问题是提出一种以太环网系统主节点从端口故障 处理方法，避免以太环网域中主节点从端口直接链接的链路发生故障时端口 状态错误。
为了解决上述技术问题，本发明提供一种以太环网系统主节点从端口故 障处理方法， 包括如下步骤：
( 1 )主节点检测从端口直接链接链路的状态；
( 2 )如果主节点从端口直接链接的链路出现故障， 将从端口置于阻塞 状态； 在所述链路故障期间， 保持从端口阻塞状态。
进一步地， 所述步骤（1 ) 中， 主节点通过检测光信号， 检测从端口直 接链接链路的状态。
进一步地， 若主节点检测不到从端口直接链接链路发送的光信号， 则判 断从端口直接链接的链路出现故障。
进一步地， 所述步骤（1 ) 中， 主节点与直接链接链路的对端节点之间 通过互相发包检测从端口直接链接链路的状态。
进一步地， 若主节点在一段时间内收不到对端节点发送的检测包， 则判 断从端口直接链接的链路出现故障。
进一步地， 所述步骤（2 ) 中， 在所述从端口阻塞状态下， 如果在该阻 塞端口接收到保护虚拟局域网的数据， 则丟弃， 不向对端节点端口发送和转 发保护虚拟局域网的数据。
本发明以太环网系统主节点从端口故障处理方法，当主节点从端口直接 链接的链路出现故障时，将从端口置于阻塞状态且在主节点从端口对应链路 故障期间保持阻塞状态， 保证主节点从端口的状态正确。 附图概述
图 1为以太环网保护系统环上链路正常时的拓朴图；
图 2为以太环网保护系统环上链路故障时的拓朴图；
图 3为以太环网保护系统主节点从端口链路发生故障的拓朴图； 图 4为本发明以太环网系统主节点从端口故障的处理方法的流程图； 图 5为本发明在主节点从端口链路发生故障的应用实例图；
图 6为本发明在环上链路多处故障的应用实例图。
本发明的最佳实施方式
本发明思想是，当以太环网主节点检测到从端口直接链接的链路发生故 障时， 无论在检测到从端口故障前的环网状态是完好还是故障， 都将从端口 阻塞， 并且在所述链路故障期间， 保持阻塞状态。
下面结合附图及具体实施例对本发明进行详细说明。
如图 4所示，本发明以太环网系统主节点从端口故障的处理方法包括如 下步骤：
步骤 401， 主节点检测从端口直接链接的链路状态；
目前有多种检测机制可检测链路状态， 例如光纤可以检测光信号， 如果 检测不到就认为链路故障； 或者与对端节点之间互相发包检测， 如果在一定 时间之内收不到对端节点发送的检测包， 则认为链路故障等。
步骤 402， 如果主节点从端口直接链接的链路出现故障， 将从端口置于 阻塞状态， 即阻塞从端口的保护业务 VLA 转发功能， 无论在检测到从端 口故障前的环网状态是完好还是故障；在主节点从端口直接链接的链路故障 期间， 保持从端口阻塞状态。
在从端口阻塞状态下， 如果在该阻塞端口接收到保护 VLAN的数据， 则丢弃， 不向对端节点端口发送和转发保护 VLAN的数据。 当然对于环网 协议帧等是可以传送的。
如图 5和图 6所示， 为在某以太环网保护系统中， 本发明的应用实例： 环上的有 3个传输节点和 1个主节点， 主节点从端口链路出现故障， 则 将主节点的从端口置于阻塞状态， 如图 5所示。 另外一条链路又发生故障， 发送链路故障告警消息通知主节点， 主节点的从端口链路为故障， 仍然保持 从端口为阻塞状态， 如图 6所示。
本发明以太环网系统主节点从端口故障的处理方法，在主节点从端口对 应链路故障期间保持阻塞状态，避免以太环网域中主节点从端口发生故障时 端口状态错误，从而避免用户查询时，误导用户，以及引起广播风暴的可能。 本发明可用于多种以太环网保护技术中。
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， 本发明的保护范围以 权利要求为准。
工业实用性
本发明以太环网系统主节点从端口故障的处理方法，当主节点从端口直 接链接的链路出现故障时，将从端口置于阻塞状态且在主节点从端口对应链 路故障期间保持阻塞状态，避免以太环网域中主节点从端口发生故障时端口 状态错误， 从而避免用户查询时， 误导用户， 以及引起广播风暴的可能。 本 发明可用于多种以太环网保护技术中。

Claims

权 利 要 求 书
1、 一种以太环网系统主节点从端口故障处理方法， 其特征在于， 包括 如下步骤：
( 1 )主节点检测从端口直接链接的链路状态；
( 2 )如果主节点从端口直接链接的链路出现故障， 将从端口置于阻塞 状态， 并在所述链路故障期间， 保持从端口阻塞状态。
2、 根据权利要求 1所述的方法， 其特征在于， 所述步骤（ 1 ) 中， 主节 点通过检测光信号来检测从端口直接链接的链路状态。
3、 根据权利要求 2所述的方法， 其特征在于， 若主节点检测不到从端 口直接链接的链路发送的光信号， 则判断从端口直接链接的链路出现故障。
4、 根据权利要求 1所述的方法， 其特征在于， 所述步骤（ 1 ) 中， 主节 点与直接链接链路的对端节点之间通过互相发包来检测从端口直接链接的 链路状态。
5、 根据权利要求 4所述的方法， 其特征在于， 若主节点在一段时间内 收不到对端节点发送的检测包， 则判断从端口直接链接的链路出现故障。
6、 根据权利要求 1所述的方法， 其特征在于， 所述步骤（2 ) 中， 在所 述从端口阻塞状态下，如果在该阻塞端口接收到保护虚拟局域网的数据， 则 丟弃， 不向对端节点端口发送和转发保护虚拟局域网的数据。
PCT/CN2007/003688 2007-10-12 2007-12-19 Method for processing failure of slave port of master node in ethernet ring network system Ceased WO2009046591A1 (en)

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PL07855718T PL2207307T3 (pl) 2007-10-12 2007-12-19 Sposób przetwarzania awarii portu podrzędnego węzła nadrzędnego w systemie pierścienia sieci Ethernet
US12/733,987 US20100254257A1 (en) 2007-10-12 2007-12-19 Method for processing failure of slave port of master node in ethernet ring network system
ES07855718.8T ES2455190T3 (es) 2007-10-12 2007-12-19 Método para el procesamiento del fallo operativo del puerto esclavo del nodo maestro en un sistema de red Ethernet en anillo

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