WO2012126412A2 - 以太网环保护倒换方法、网络设备及系统 - Google Patents

以太网环保护倒换方法、网络设备及系统 Download PDF

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Publication number
WO2012126412A2
WO2012126412A2 PCT/CN2012/074927 CN2012074927W WO2012126412A2 WO 2012126412 A2 WO2012126412 A2 WO 2012126412A2 CN 2012074927 W CN2012074927 W CN 2012074927W WO 2012126412 A2 WO2012126412 A2 WO 2012126412A2
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WO
WIPO (PCT)
Prior art keywords
link
node
ethernet ring
bandwidth
network device
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PCT/CN2012/074927
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English (en)
French (fr)
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WO2012126412A3 (zh
Inventor
�龙昊
谢荣
申小军
Original Assignee
华为技术有限公司
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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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/074927 priority Critical patent/WO2012126412A2/zh
Priority to EP12760434.6A priority patent/EP2618523B1/en
Priority to CN201280000311.7A priority patent/CN102754390B/zh
Priority to AU2012231488A priority patent/AU2012231488B2/en
Publication of WO2012126412A2 publication Critical patent/WO2012126412A2/zh
Publication of WO2012126412A3 publication Critical patent/WO2012126412A3/zh
Priority to US13/892,796 priority patent/US9246751B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06Management of faults, events, alarms or notifications
    • H04L41/0654Management of faults, events, alarms or notifications using network fault recovery
    • 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
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06Management of faults, events, alarms or notifications
    • H04L41/0654Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663Performing the actions predefined by failover planning, e.g. switching to standby network elements

Definitions

  • the present invention relates to communications technologies, and in particular, to an Ethernet ring protection switching method, a network device, and a system. Background technique
  • R-APS Ring Automatic Protection Switching
  • one or more Ethernet Ring Protection (ERP) instances can be configured on an Ethernet ring.
  • at least one link is set as a backup link, that is, ring protection.
  • RPL Ring Protection Link
  • the RPL In the normal working state of the ERP instance, the RPL is in the blocking state, that is, the port participating in the ERP instance is blocked on the node at either end of the RPL.
  • the blocked port can be opened and the service transmission is performed through the RPL.
  • the embodiments of the present invention provide an Ethernet ring protection switching method, a network device, and a system, which are used to improve the flexibility of ring protection switching.
  • an Ethernet ring protection switching method including:
  • the node obtains the bandwidth information of the first link on the Ethernet ring where the node is located, and determines that the bandwidth of the first link changes; the Ethernet ring has at least one ERP instance;
  • a computer program product comprising computer program code, wherein when a computer unit executes the computer program code, the computer unit performs the actions recited in the Ethernet ring protection switching method.
  • Another aspect provides a network device, including:
  • a receiver configured to obtain bandwidth information of a first link on an Ethernet ring where the network device is located; the Ethernet ring has at least one ERP instance;
  • a determining unit configured to determine a change in bandwidth of the first link, and determine a port of the network device that the at least one ERP instance passes;
  • An operation unit configured to query a correspondence between the bandwidth information of each link on the Ethernet ring and the switching information, and perform, by using a port of the network device, a bandwidth information corresponding to the first link Switching operation.
  • an Ethernet ring protection switching system including the foregoing network device, and another network device, configured to send a bandwidth information packet to the network device, where the bandwidth information packet carries the Bandwidth information for a link.
  • the embodiment of the present invention obtains the bandwidth information of the first link on the Ethernet ring where the node is located, and determines that the bandwidth of the first link changes.
  • the Ethernet ring has at least one An ERP instance, where the node determines the port of the node through which the at least one ERP instance is located, so that the node can query bandwidth information and switching information of each link on the pre-configured Ethernet ring
  • the switching operation corresponding to the bandwidth information of the first link is performed by the port of the node, which can solve the problem that the ring protection switching can be triggered only in the case of a link failure or a manual forced switching in the prior art. , thus improving the flexibility of the ring protection switching.
  • FIG. 1 is a schematic flowchart of a method for switching an Ethernet ring protection according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an Ethernet ring protection switching method according to another embodiment of the present invention
  • Network ring diagram is a schematic diagram of an Ethernet ring protection switching method according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another Ethernet ring applied to an Ethernet ring protection switching method according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another Ethernet ring applied to an Ethernet ring protection switching method according to another embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a network device according to another embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • multiple ERP instances may be through one node, and there may also be multiple ports on the node.
  • the link and the port, the link or the port of the other node through which the same ERP instance passes may also adopt the technical solution provided by the present invention, and also within the consideration of the Ethernet ring protection switching method.
  • the embodiment of the present invention can be applied to any node in the same Ethernet ring, that is, the node can be any node in the same Ethernet ring.
  • the link is a physical link or a logical link; the bandwidth of the link may be the bandwidth of a physical link or a logical link where the node is located.
  • An ERP instance is used to protect a virtual local area network (VLAN) in a physical Ethernet ring.
  • VLAN virtual local area network
  • Each ERP instance is independent of other ERP instances configured on the Ethernet ring.
  • Each ERP instance can independently apply the protection mechanism described in the R-APS protocol.
  • FIG. 1 is a schematic flowchart of an Ethernet ring protection switching method according to an embodiment of the present invention. As shown in FIG. 1 , the Ethernet ring protection switching method in this embodiment may include:
  • the node obtains the bandwidth information of the first link on the Ethernet ring where the node is located, and determines that the bandwidth of the first link changes; the Ethernet ring has at least one ERP instance. You can configure multiple ERP instances on an Ethernet ring. You can optimize the transmission routing of services through the configuration of blocking positions on different ports. On the other hand, you can also limit the bandwidth resources of each ERP instance to ensure the Ethernet ring. Business performance on the transmission.
  • the bandwidth information of the first link may be the bandwidth information corresponding to the physical link or the bandwidth information corresponding to the logical link.
  • the change in the bandwidth may be bandwidth degradation.
  • bandwidth degradation usually occurs in the following situations: (1) The link is a microwave link. When the microwave device is adaptively modulated, it causes a bandwidth change. (2) The link is a link aggregation group (Link Aggregation Group, LAG). ), when a group member of the LAG fails, it causes a bandwidth change.
  • LAG Link Aggregation Group
  • the node determines a port of the node via which the at least one ERP instance passes.
  • the node queries a correspondence between the bandwidth information of each link on the Ethernet ring and the switching information, and performs a switching corresponding to the bandwidth information of the first link by using the port of the node. operating.
  • the port of the node through which the at least one ERP instance is referred to is generally referred to as a virtual port corresponding to each ERP instance.
  • the bandwidth information of each link on the Ethernet ring may be the bandwidth information corresponding to the physical link or the bandwidth information corresponding to the logical link.
  • the bandwidth information of each link on the Ethernet ring may include, but is not limited to, at least one of the following information: bandwidth information of other links on the node, and other nodes sent by other nodes. Bandwidth information of the uplink, bandwidth information of links on other nodes stored in the ring network bandwidth database of the node.
  • the first link may be the link where the node is located, or may be other links on the Ethernet ring, which is not limited in this embodiment.
  • the node is an end node of the first link, and before the node, the node may further detect a bandwidth of the first link, where Obtaining bandwidth information of the first link on the Ethernet ring where the node is located.
  • the node may receive the bandwidth information packet sent by the end node of the first link, where the bandwidth information packet carries The bandwidth information of the first link.
  • the bandwidth information packet may further include link location information, where the link location information may include node information or a combination of node information and port information.
  • the bandwidth information packet may be an R-APS protocol message.
  • the node may further store a correspondence between bandwidth information and switching information of each link on the Ethernet ring, where the Ethernet
  • the mapping between the bandwidth information of each link on the ring and the switching information may include the following: the correspondence between the bandwidth value of each link on the Ethernet ring and the bandwidth index,
  • the configuration principle of the switching information may be many. For example, by selecting a link with a higher bandwidth as a working link, the idle bandwidth on the standby link can be fully utilized, and the utilization efficiency of the network bandwidth is improved. Maximize the business capacity of the Ethernet ring.
  • the switching information includes port blocking and port opening.
  • Port blocking refers to disabling data traffic from passing through the port, usually by setting forwarding table filtering.
  • forwarding table filtering usually by setting forwarding table filtering.
  • the bandwidth information of the first link on the Ethernet ring where the node is located is obtained by the node, and the bandwidth of the first link is changed.
  • the Ethernet ring has at least one ERP instance, and then Determining, by the node, a port of the node through which the at least one ERP instance is located, so that the node can query a correspondence between the bandwidth information of each link on the Ethernet ring and the switching information, and The port of the node performs the switching operation corresponding to the bandwidth information of the first link, which can solve the problem that the ring protection switching can be triggered only in the case of a link failure or a manual forced switching in the prior art, thereby improving the ring.
  • the flexibility of protection switching With the technical solution provided by the invention, if the bandwidth of the link on the Ethernet ring changes, the data transmission can be performed by using the backup link with higher bandwidth, which can effectively ensure the maximum service capacity of the Ethernet ring.
  • the Ethernet ring shown in FIG. 2 will be taken as an example.
  • the Ethernet ring consists of six nodes, node-node F, each with a bandwidth of 400 Mbps (megabits per second).
  • the Ethernet ring is configured with ERP 1 instance, ERP 2 instance, and ERP 3.
  • the RPL of each ERP instance is blocked, that is, the port of the node at either end of the RPL via the ERP instance is blocked.
  • the RPL blocking may be a single-ended blocking or a double-ended blocking, and the Ethernet ring shown in Figure 2 uses a double-ended blocking manner.
  • node A is taken as an example to illustrate the specific switching process.
  • the corresponding relationship between the bandwidth information and the switching information of each link on the Ethernet ring is pre-configured on the node A.
  • the switching information is embodied in the configuration of the blocking position of each ERP instance via the port of the node A.
  • each ERP instance is configured to be connected via the link.
  • the switching information of the port of node A corresponding to A ⁇ B.
  • each ERP instance should be configured with only one link blocked, that is, the ERP instance has only one end of one link or both ends of the node. The mouth is blocked.
  • the port of the node A corresponding to the link A ⁇ B is blocked by the ERP 1 instance, and in this case, the port of the node B corresponding to the ERP 1 instance via the link A ⁇ B can be The selected port is configured to block, and the other ports through which the ERP 1 instance passes should not be configured to block.
  • node A detects that link A ⁇ B is reduced to 300 Mbps.
  • the node A uses the detected bandwidth information of the link A ⁇ B, and combines the bandwidth information of other links on the Ethernet ring stored on the node, by querying Table 1 and Table 2, the changed Ethernet.
  • the bandwidth of the link on the network ring corresponds to the bandwidth index of Table 1 as B1, and the corresponding switching information of B1 in Table 2 is that the port of node A corresponding to the link A ⁇ B that blocks the ERP 1 instance is opened, and the ERP 2 instance is opened.
  • node A performs the following operations:
  • Node A blocks the ERP 1 instance via the port corresponding to the link A ⁇ B, and sends an R-APS protocol message on the ERP 1 instance, the R-APS protocol message containing the ERP 1 instance via the chain The information of the port A of the node A corresponding to the path A ⁇ B is blocked. The other node receives the R-APS protocol message and opens the port through which the ERP 1 instance on the other node passes.
  • the node A receives the R-APS protocol message sent by the node D, where the R-APS protocol message includes the blocked information of the port of the node D corresponding to the ERP 2 instance via the link C ⁇ D, the node. A then keeps the ERP 2 instance open via the port corresponding to link A ⁇ B.
  • the node A is blocked by the ERP 3 instance via the port corresponding to the link A ⁇ B, and the R-APS protocol message is sent on the ERP 3 instance, where the R-APS protocol message is included.
  • the ERP 3 instance is blocked by the port A of the node A corresponding to the link A ⁇ B.
  • the other node receives the R-APS protocol message and opens the port through which the ERP 3 instance on the other node passes.
  • Node B is configured to block the link A ⁇ B under such bandwidth conditions, Node B also needs to block the corresponding port and does not need to be opened.
  • the node A also needs to use the bandwidth information of each link on the Ethernet ring stored on the node. Update.
  • each node on the Ethernet ring learns that the bandwidth of the link A ⁇ B is reduced, it can be determined according to the correspondence between the bandwidth information of each link on the Ethernet ring and the switching information.
  • the switching information corresponding to the bandwidth information of each link on the Ethernet ring enables each node on the Ethernet ring to switch the three ERP instances through the port corresponding to the specified link according to the switching information.
  • Ethernet ring protection switching can be adaptively performed according to the bandwidth of the link on the Ethernet ring and the preset switching information, as compared with the technology of triggering the ring protection switching in the case of a link failure or a manual forced switching.
  • the node C and/or the node D detects that the bandwidth of the link CD is reduced to 200 Mpbs, and then sends a bandwidth information packet, where the bandwidth information packet includes the bandwidth information and the link location information of the link 0 ⁇ D.
  • the bandwidth information message may be an R-APS protocol message by carrying bandwidth information and link location information in its protocol data unit, where the link location information may be represented by a combination of a node ID and a port number. In this way, the node A acquires the bandwidth information and the link location information contained in the bandwidth information packet.
  • the node A uses the obtained bandwidth information of the link 0 ⁇ D, and combines the bandwidth information of other links on the Ethernet ring stored on the node, and queries the changed Ethernet by querying Table 1 and Table 2.
  • the bandwidth index of the link on the ring corresponds to the bandwidth index of B1 in Table 1.
  • the corresponding switchover information in Table 2 is the port of node A corresponding to the link A ⁇ B through which the ERP 1 instance is opened, and the instance of the blocked ERP 2 is blocked.
  • node A performs the following operations:
  • the node A receives the R-APS protocol message sent by the node D, where the R-APS protocol message includes the blocked information of the port of the node D corresponding to the ERP 1 instance via the link C ⁇ D, the node A opens the port corresponding to the ERP 1 instance via link A ⁇ B.
  • Node A blocks the ERP 2 instance corresponding to the link A ⁇ B.
  • the port sends an R-APS protocol message on the ERP 2 instance, where the R-APS protocol message includes information that the ERP 2 instance is blocked by the port of the node A corresponding to the link A ⁇ B.
  • the other node receives the R-APS protocol message and opens a port through which the ERP 2 instance on the other node passes.
  • Node A receives the R-APS protocol message sent by the node D, where the R-APS protocol message includes the information that the ERP 3 instance is blocked by the port corresponding to the link 0 ⁇ D, and the node A is opened.
  • the E RP 3 instance is via the port corresponding to link A ⁇ B.
  • node A also needs to update the bandwidth information of each link on the Ethernet ring stored on the node.
  • each node on the Ethernet ring learns that the bandwidth of the link 0 ⁇ D is reduced, it can be determined according to the correspondence between the bandwidth information of each link on the Ethernet ring and the switching information.
  • the switching information corresponding to the bandwidth information of each link on the Ethernet ring enables each node on the Ethernet ring to switch the three ERP instances through the port corresponding to the specified link according to the switching information.
  • Ethernet ring protection switching can be adaptively performed according to the bandwidth of the link on the Ethernet ring and the preset switching information, as compared with the technology of triggering the ring protection switching in the case of a link failure or a manual forced switching.
  • Another embodiment of the present invention provides a computer program product comprising computer program code, wherein when a computer unit executes the computer program code, the computer unit performs the actions recited in the Ethernet ring protection switching method.
  • FIG. 5 is a schematic structural diagram of a network device according to another embodiment of the present invention.
  • the network device in this embodiment may include a receiver 51, a determining unit 52, and an operating unit 53.
  • the receiver 51 is configured to obtain bandwidth information of the first link on the Ethernet ring where the network device is located;
  • the Ethernet ring has at least one ERP instance;
  • the determining unit 52 is configured to determine a change in the bandwidth of the first link, and determine a port of the network device via which the at least one ERP instance passes;
  • the operating unit 53 is configured to query And a switching operation corresponding to the bandwidth information of the first link is performed by a port of the network device by using a pre-configured relationship between the bandwidth information of each link on the Ethernet ring and the switching information.
  • the network device is an end network device of the first link, and the network device provided in this embodiment further includes a detecting unit, as shown in FIG. 61.
  • the bandwidth used to detect the first link is an end network device of the first link, and the network device provided in this embodiment further includes a detecting unit, as shown in FIG. 61. The bandwidth used to detect the first link.
  • the network device is an end network device of the first link
  • the receiver 51 may further receive the end network device sent by the first link.
  • a bandwidth information packet where the bandwidth information packet carries bandwidth information of the first link.
  • the network device provided in this embodiment further includes a memory 71, configured to store each link on the Ethernet ring.
  • a memory 71 configured to store each link on the Ethernet ring.
  • the corresponding relationship between the bandwidth information of each link on the Ethernet ring and the switching information includes:
  • the network device obtains the bandwidth information of the first link on the Ethernet ring where the network device is located by using the receiver, and determines, by the determining unit, that the bandwidth of the first link changes, the Ethernet ring Having at least one ERP instance, and determining a port of the network device via which the at least one ERP instance is passed, so that the operating unit can query the correspondence between the bandwidth information of each link on the Ethernet ring and the switching information And performing, by the port of the network device, a switching operation corresponding to the bandwidth information of the first link, where the receiver obtains bandwidth information of each link on the Ethernet ring where the network device is located, where the ring network configuration There is at least one ERP instance, and the learned unit learns that the bandwidth of the link on the Ethernet ring changes according to the bandwidth information, and further determines that the unit can according to the bandwidth information of each link on the pre-configured Ethernet ring.
  • the line switching operation can solve the problem that the ring protection switching can be triggered only in the case of a link failure or a manual forced switching in the prior art, thereby improving the flexibility of the ring protection switching.
  • the bandwidth of the link on the Ethernet ring changes, the data transmission can be performed by using the backup link with a higher bandwidth, thereby effectively ensuring the maximum service capacity of the Ethernet ring.
  • Another embodiment of the present invention further provides an Ethernet ring protection switching system, which may include the following figure.
  • the network device provided by the embodiment corresponding to 5, 6 or 7 further includes another network device, configured to send a bandwidth information packet to the network device, where the bandwidth information packet carries the bandwidth of the first link information.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the software functional units described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform portions of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, A removable hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program code.

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Description

以太网环保护倒换方法、 网络设备及系统 技术领域 本发明涉及通信技术, 尤其涉及一种以太网环保护倒换方法、 网络设备 及系统。 背景技术
为了保证网络链路的可靠性, 通常会通过环自动保护倒换 ( Ring Automatic Protection Switching, R-APS )协议对以太网环中的故障链路进 行倒换, 从而实现为以太网业务提供保护。 现有技术中, 一个以太网环上可 以配置一个或多个以太网环保护 (Ethernet Ring Protection, ERP ) 实例, 在每个 ERP实例中, 设定至少一条链路作为备用链路, 即环保护链路( Ring Protection Link, RPL ) 。 在 ERP实例正常工作状态下, RPL处于阻塞状态 即 RPL任一端的节点上参与该 ERP实例的端口阻塞。当参与该 ERP实例的 某段链路或某个节点发生故障时, 则可以打开阻塞的端口, 通过 RPL进行业 务传输。
然而, 传统的环保护倒换方法只有在链路故障或人工强制倒换的情况下 才能触发环保护倒换, 环保护倒换的灵活性不高。 发明内容 本发明实施例提供一种以太网环保护倒换方法、 网络设备及系统, 用以 提高环保护倒换的灵活性。
一方面提供了一种以太网环保护倒换方法, 包括:
节点获得所述节点所在以太网环上的第一链路的带宽信息, 确定所述第 —链路的带宽发生变化; 所述以太网环具有至少一个 ERP实例;
所述节点确定所述至少一个 ERP实例经由的所述节点的端口; 所述节点查询预先配置的所述以太网环上的各条链路的带宽信息与倒换 信息的对应关系, 通过所述节点的端口执行与所述第一链路的带宽信息对应 的倒换操作。 另一方面提供了一种计算机程序产品, 包括计算机程序代码, 当一个计 算机单元执行所述计算机程序代码时, 所述计算机单元执行上述以太网环保 护倒换方法中所记载的动作。
另一方面提供了一种网络设备, 包括:
接收器,用于获得所述网络设备所在以太网环上的第一链路的带宽信息; 所述以太网环具有至少一个 ERP实例;
确定单元, 用于确定所述第一链路的带宽发生变化, 以及确定所述至少 一个 ERP实例经由的所述网络设备的端口;
操作单元, 用于查询预先配置的所述以太网环上的各条链路的带宽信息 与倒换信息的对应关系 , 通过所述网络设备的端口执行与所述第一链路的带 宽信息对应的倒换操作。
另一方面提供了一种以太网环保护倒换系统, 包括上述网络设备, 还包 括另一网络设备, 用于向所述网络设备发送带宽信息报文, 所述带宽信息报 文中携带所述第一链路的带宽信息。
由上述技术方案可知, 本发明实施例通过节点获得所述节点所在以太网 环上的第一链路的带宽信息, 确定所述第一链路的带宽发生变化, 所述以太 网环具有至少一个 ERP实例, 进而由所述节点确定所述至少一个 ERP实例 经由的所述节点的端口, 使得所述节点能够查询预先配置的所述以太网环上 的各条链路的带宽信息与倒换信息的对应关系, 通过所述节点的端口执行与 所述第一链路的带宽信息对应的倒换操作, 能够解决现有技术中只有在链路 故障或人工强制倒换的情况下才能触发环保护倒换的问题, 从而提高了环保 护倒换的灵活性。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在 不付出创造性劳动性的前提下, 还可以根据这些附图获得其它的附图。
图 1为本发明一实施例提供的以太网环保护倒换方法的流程示意图; 图 2为本发明另一实施例提供的以太网环保护倒换方法所适用的一以太 网环示意图;
图 3为本发明另一实施例提供的以太网环保护倒换方法所适用的另一以 太网环示意图;
图 4为本发明另一实施例提供的以太网环保护倒换方法所适用的另一以 太网环示意图;
图 5为本发明另一实施例提供的网络设备的结构示意图;
图 6为本发明另一实施例提供的网络设备的结构示意图;
图 7为本发明另一实施例提供的网络设备的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于 本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获 得的所有其它实施例, 都属于本发明保护的范围。
需要说明的是, 在各个节点构成的网络中, 多个 ERP实例可以经由一个 节点, 所述节点上也可能会有多个端口, 在本发明的描述中, 仅描述其中一 个节点及属于该节点的链路和端口,同一个 ERP实例经由的其它节点的链路 或端口, 也可以釆用本发明提供的技术方案, 也在该以太网环保护倒换方法 的考虑范围内。 本发明实施例可以应用于同一以太网环中的任一节点上, 即 所述节点可以是同一以太网环中的任一节点。 在本发明的描述中, 所述链路 是物理链路, 也可以为逻辑链路; 所述链路的带宽则可以是节点所在的物理 链路或逻辑链路的带宽。
ERP 实例用于保护物理以太网环内的虚拟局域网 (Virtual Local Area Network, VLAN )。 每个 ERP实例与以太网环上配置的其它 ERP实例相互 独立。 每个 ERP实例都可以独立适用 R-APS协议所述的保护机制。
图 1 为本发明一实施例提供的以太网环保护倒换方法的流程示意图, 如 图 1所示, 本实施例的以太网环保护倒换方法可以包括:
101、节点获得所述节点所在以太网环上的第一链路的带宽信息,确定所 述第一链路的带宽发生变化; 所述以太网环具有至少一个 ERP实例。 在一个以太网环上可以配置多个 ERP实例,通过不同端口的阻塞位置的 配置, 可以优化业务的传输路由; 另一方面, 还可以通过限制各个 ERP实例 的带宽资源, 来保证在以太网环上传输的业务性能。
需要说明的是, 所述第一链路的带宽信息可以为物理链路对应的带宽信 息, 也可以为逻辑链路对应的带宽信息。
可选地, 在本实施例的一个可选实施方式中, 所述带宽发生变化可以为 带宽劣化。 例如, 带宽劣化通常发生在以下情况: (1 )链路为微波链路, 当 微波设备发生自适应调制时,会引起带宽变化; (2 )链路为链路聚合组(Link Aggregation Group, LAG ) , 当 LAG的组成员发生故障时, 会引起带宽变 化。
102、 所述节点确定所述至少一个 ERP实例经由的所述节点的端口。
103、所述节点查询预先配置的所述以太网环上的各条链路的带宽信息与 倒换信息的对应关系, 通过所述节点的端口执行与所述第一链路的带宽信息 对应的倒换操作。
需要说明的是,这里所说的所述至少一个 ERP实例经由的所述节点的端 口, 通常是指对应于每个 ERP实例的虚端口。
需要说明的是, 所述以太网环上的各条链路的带宽信息可以为物理链路 对应的带宽信息, 也可以为逻辑链路对应的带宽信息。
所述以太网环上的各条链路的带宽信息, 可以包括但不限于以下信息中 的至少一种: 所述节点上的其它链路的带宽信息、 接收自其它节点发送的所 述其它节点上链路的带宽信息、 存储在所述节点的环网带宽数据库中的其它 节点上链路的带宽信息。
需要说明的是, 所述第一链路可以为所述节点所在链路, 或者还可以为 所述以太网环上其它链路, 本实施例对此不进行限定。
可选地, 本实施例的一个可选实施方式中, 所述节点是所述第一链路的 端节点, 在 101之前, 所述节点还可以进一步检测所述第一链路的带宽, 用 以获得所述节点所在以太网环上的第一链路的带宽信息。
可选地, 本实施例的一个可选实施方式中, 在 101 中, 所述节点具体可 以接收所述第一链路的端节点发送的带宽信息报文, 所述带宽信息报文中携 带所述第一链路的带宽信息。 其中, 所述带宽信息报文中还可以进一步包含链路位置信息, 所述链路 位置信息可以包括节点信息或节点信息和端口信息的组合。 例如, 所述带宽 信息报文可以为 R-APS协议消息。
可选地, 本实施例的一个可选实施方式中, 在 103之前, 所述节点还可 以存储所述以太网环上的各条链路的带宽信息与倒换信息的对应关系, 所述 以太网环上的各条链路的带宽信息与倒换信息的对应关系可以包括如下: 所述以太网环上的各条链路的带宽值与带宽索引的对应关系、
所述带宽索引与所述至少一个 ERP实例的对应关系、 以及
所述至少一个 ERP 实例与所述节点的端口需执行的倒换操作的对应关 系。
可以理解的是, 所述倒换信息的配置原则可以有很多, 例如, 通过选择 带宽较高的链路作为工作链路等, 能够充分利用备用链路上的闲置带宽, 提 高网络带宽的利用效率, 最大化以太网环的业务容量。
可以理解的是, 所述倒换信息包括端口阻塞和端口打开。 其中, 端口阻 塞是指禁止数据流量通过该端口, 通常通过设置转发表过滤来实现。 当然其 实现方式也有其它方式, 例如, 直接关闭端口等, 本实施例对此不进行限定。
本实施例中, 通过节点获得所述节点所在以太网环上的第一链路的带宽 信息, 确定所述第一链路的带宽发生变化, 所述以太网环具有至少一个 ERP 实例, 进而由所述节点确定所述至少一个 ERP实例经由的所述节点的端口, 使得所述节点能够查询预先配置的所述以太网环上的各条链路的带宽信息与 倒换信息的对应关系, 通过所述节点的端口执行与所述第一链路的带宽信息 对应的倒换操作, 能够解决现有技术中只有在链路故障或人工强制倒换的情 况下才能触发环保护倒换的问题, 从而提高了环保护倒换的灵活性。 釆用发 明提供的技术方案, 如果以太网环上链路的带宽发生变化, 能够利用带宽更 高的备用链路进行数据传输,能够有效保证以太网环的业务容量达到最大化。
为使得本发明实施例提供的方法更加清楚, 下面将以图 2所示的以太网 环为例。 由图 2可知, 以太网环由节点 ~节点 F六个节点组成, 每个物理链 路的带宽为 400Mbps (兆比特 /秒), 该以太网环配置了 ERP 1实例、 ERP 2 实例和 ERP 3实例三个 ERP实例;这三个 ERP实例有不同的 RPL:在 ERP 1实例中, RPL为链路 A^B;在 ERP 2实例中, RPL为链路 0→D;在 ERP 3实例中, RPL为链路 E^F。 在正常工作状态下, 各个 ERP实例的 RPL均 处于阻塞状态, 即该 ERP实例经由的 RPL任一端的节点的端口阻塞。 需要 说明的是, RPL阻塞可以是单端阻塞, 也可以是双端阻塞, 图 2所示的以太 网环釆用双端阻塞的方式。
这里以节点 A为例来说明具体的倒换过程。 在节点 A上预先配置有以太 网环上的各条链路的带宽信息与倒换信息的对应关系。 在本实施例中, 所述 倒换信息体现在每个 ERP实例经由节点 A的端口的阻塞位置的配置上, 如 表 1和表 2所示,在节点 A上, 配置每个 ERP实例经由链路 A^B对应的节 点 A的端口的倒换信息。
表 1 带宽信息表
Figure imgf000008_0001
表 2 倒换信息表
Figure imgf000008_0002
需要说明的是, 在每一种带宽索引对应的倒换信息, 每个 ERP实例应只 配置有一条链路被阻塞,即该 ERP实例只有一条链路一端或两端的节点的端 口被阻塞。 例如, 对应带宽索引 B1的情况, 阻塞 ERP 1实例经由链路 A^B 对应的节点 A的端口, 那么在这种情况下, 除了 ERP 1实例经由链路 A^B 对应的节点 B的端口可选地配置为阻塞外, ERP 1实例经由的其它端口均不 应配置为阻塞。
假设当前各个 ERP实例均工作在正常状态,初始状态各个链路带宽均为
400Mbps,链路 A^B对应的节点 A的端口在三个 ERP实例上均为打开。 当 链路 A^B发生带宽劣化, 带宽降低到 300Mbps, 节点 A实施倒换的过程如 下:
首先, 节点 A检测到链路 A^B降低到 300Mbps。
然后, 节点 A利用检测到的链路 A^B的带宽信息, 并结合节点上存储 的所述以太网环上其它链路的带宽信息, 通过查询表 1 和表 2, 变化后的所 述以太网环上链路的带宽对应表 1的带宽索引为 B1 , B1在表 2中对应的倒 换信息是, 阻塞 ERP 1 实例经由的链路 A^B对应的节点 A的端口、 打开 ERP 2实例经由的链路 A^B对应的节点 A的端口、以及阻塞 ERP 3实例经 由的链路 A^B对应的节点 A的端口。
接着, 节点 A根据获得的倒换信息, 进行如下操作:
51 1、 针对 ERP 1实例: 节点 A阻塞 ERP 1实例经由链路 A^B对应的 端口, 并在 ERP 1实例上发送 R-APS协议消息, 该 R-APS协议消息中包含 ERP 1 实例经由链路 A^B对应的节点 A的端口已阻塞的信息。 其它节点接 收到所述 R-APS协议消息, 打开其它节点上 ERP 1实例经由的端口。
512、针对 ERP 2实例: 节点 A接收到节点 D发送的 R-APS协议消息, 该 R-APS协议消息中包含 ERP 2实例经由链路 C^D对应的节点 D的端口 已阻塞的信息, 节点 A则保持打开 ERP 2实例经由链路 A^B对应的端口。
513、 针对 ERP 3实例: 节点 A阻塞 ERP 3实例经由链路 A^B对应的 端口, 并在 ERP 3实例上发送 R-APS协议消息, 该 R-APS协议消息中包含
ERP 3实例经由链路 A^B对应的节点 A的端口已阻塞的信息。 其它节点接 收到所述 R-APS协议消息, 打开其它节点上 ERP 3实例经由的端口。 可选 地, 如果节点 B上在这种带宽情况下配置阻塞链路 A^B, 那么节点 B也需 要将对应端口阻塞, 不需要打开。
另外, 节点 A还需要将节点上存储的所述以太网环上各条链路的带宽信 息进行更新。
这样, 如图 3所示, 在以太网环上各个节点获知链路 A^B的带宽降低 的情况下, 可以根据以太网环上的各条链路的带宽信息与倒换信息的对应关 系, 确定与以太网环上各条链路的带宽信息对应的倒换信息, 使得以太网环 上各个节点能够根据所述倒换信息,分别对三个 ERP实例经由指定链路对应 的端口进行倒换操作, 从而实现了以太网环保护倒换。 与现有技术中只有在 链路故障或人工强制倒换的情况下才能触发环保护倒换的技术相比, 可以根 据以太网环上链路的带宽和预设倒换信息自适应地进行环保护倒换, 通过选 择带宽较高的链路作为工作链路, 从而充分利用备用链路上的闲置带宽, 提 高网络带宽的利用效率, 最大化以太网环的业务容量。
假设链路 A^B的带宽已经降低到 300Mbps,此时 ERP 1实例和 ERP 3 实例的阻塞端口位置分别在节点 A上。 当链路 0→D发生带宽劣化, 带宽降 低到 200Mbps, 节点 A的具体倒换过程如下:
首先, 节点 C和 /或节点 D检测到链路 C D的带宽降低到 200Mpbs, 则发送带宽信息报文, 该带宽信息报文中包含链路 0→D的带宽信息和链路 位置信息; 所述带宽信息报文可以是 R-APS协议消息, 通过在其协议数据单 元中携带带宽信息和链路位置信息,其中链路位置信息可以用节点 ID和端口 号来组合表示。 这样, 节点 A获取所述带宽信息报文中包含的带宽信息和链 路位置信息。
然后, 节点 A利用获得的链路 0→D的带宽信息, 并结合节点上存储的 所述以太网环上其它链路的带宽信息, 通过查询表 1 和表 2, 变化后的所述 以太网环上链路的带宽对应表 1的带宽索引为 B50, B50在表 2中对应的倒 换信息是, 打开 ERP 1 实例经由的链路 A^B对应的节点 A的端口、 阻塞 ERP 2实例经由的链路 A^B对应的节点 A的端口、以及打开 ERP 3实例经 由的链路 A^B对应的节点 A的端口。
接着, 节点 A根据获得的倒换信息, 进行如下操作:
S21、针对 ERP 1实例: 节点 A接收到节点 D发送的 R-APS协议消息, 该 R-APS协议消息中包含 ERP 1实例经由链路 C^D对应的节点 D的端口 已阻塞的信息, 节点 A则打开 ERP 1实例经由链路 A^B对应的端口。
S22、针对 ERP 2实例: 节点 A阻塞 ERP 2实例经由链路 A^B对应的 端口, 并在 ERP 2实例上发送 R-APS协议消息, 该 R-APS协议消息中包含 ERP 2实例经由链路 A^B对应的节点 A的端口已阻塞的信息。 其它节点接 收到所述 R-APS协议消息, 打开其它节点上 ERP 2实例经由的端口。
S23、针对 ERP 3实例: 节点 A接收到节点 D发送的 R-APS协议消息, 该 R-APS协议消息中包含 ERP 3实例经由链路 0→D对应的端口已阻塞的 信息, 节点 A则打开 E RP 3实例经由链路 A^B对应的端口。
另外, 节点 A还需要将节点上存储的所述以太网环上各条链路的带宽信 息进行更新。
这样, 如图 4所示, 在以太网环上各个节点获知链路 0→D的带宽降低 的情况下, 可以根据以太网环上的各条链路的带宽信息与倒换信息的对应关 系, 确定与以太网环上各条链路的带宽信息对应的倒换信息, 使得以太网环 上各个节点能够根据所述倒换信息,分别对三个 ERP实例经由指定链路对应 的端口进行倒换操作, 从而实现了以太网环保护倒换。 与现有技术中只有在 链路故障或人工强制倒换的情况下才能触发环保护倒换的技术相比, 可以根 据以太网环上链路的带宽和预设倒换信息自适应地进行环保护倒换, 通过选 择带宽较高的链路作为工作链路, 从而充分利用备用链路上的闲置带宽, 提 高网络带宽的利用效率, 最大化以太网环的业务容量。
本发明另一实施例提供了一种计算机程序产品, 包括计算机程序代码, 当一个计算机单元执行所述计算机程序代码时, 所述计算机单元执行上述以 太网环保护倒换方法中所记载的动作。
需要说明的是, 对于前述的各方法实施例, 为了简单描述, 故将其都表 述为一系列的动作组合, 但是本领域技术人员应该知悉, 本发明并不受所描 述的动作顺序的限制, 因为依据本发明, 某些步骤可以釆用其它顺序或者同 时进行。 其次, 本领域技术人员也应该知悉, 说明书中所描述的实施例均属 于优选实施例, 所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中, 对各个实施例的描述都各有侧重, 某个实施例中没有 详述的部分, 可以参见其它实施例的相关描述。
图 5为本发明另一实施例提供的网络设备的结构示意图, 如图 5所示, 本实施例的网络设备可以包括接收器 51、确定单元 52和操作单元 53。其中, 接收器 51用于获得所述网络设备所在以太网环上的第一链路的带宽信息;所 述以太网环具有至少一个 ERP实例; 确定单元 52用于确定所述第一链路的 带宽发生变化, 以及确定所述至少一个 ERP 实例经由的所述网络设备的端 口;操作单元 53用于查询预先配置的所述以太网环上的各条链路的带宽信息 与倒换信息的对应关系 , 通过所述网络设备的端口执行与所述第一链路的带 宽信息对应的倒换操作。
可选地, 本实施例的一个可选实施方式中, 所述网络设备是所述第一链 路的端网络设备, 如图 6所示, 本实施例提供的所述网络设备还包括检测单 元 61 , 用于检测所述第一链路的带宽。
可选地, 本实施例的一个可选实施方式中, 所述网络设备是所述第一链 路的端网络设备,接收器 51还可以进一步接收所述第一链路的端网络设备发 送的带宽信息报文, 所述带宽信息报文中携带所述第一链路的带宽信息。
可选地, 本实施例的一个可选实施方式中, 如图 7所示, 本实施例提供 的所述网络设备还包括存储器 71, 用于存储所述以太网环上的各条链路的带 宽信息与倒换信息的对应关系, 所述以太网环上的各条链路的带宽信息与倒 换信息的对应关系包括:
所述以太网环上的各条链路的带宽值与带宽索引的对应关系、
所述带宽索引与所述至少一个 ERP实例的对应关系、 以及
所述至少一个 ERP 实例与所述网络设备的端口需执行的倒换操作的对 应关系。
本实施例中, 网络设备通过接收器获得所述网络设备所在以太网环上的 第一链路的带宽信息, 并由确定单元确定所述第一链路的带宽发生变化, 所 述以太网环具有至少一个 ERP实例, 进而确定所述至少一个 ERP实例经由 的所述网络设备的端口, 使得操作单元能够查询预先配置的所述以太网环上 的各条链路的带宽信息与倒换信息的对应关系, 通过所述网络设备的端口执 行与所述第一链路的带宽信息对应的倒换操作, 接收器获得所述网络设备所 在以太网环上各条链路的带宽信息, 所述环网络配置有至少一个 ERP实例, 并由获知单元根据所述带宽信息,获知所述以太网环上链路的带宽发生变化, 进而确定单元可以根据预先配置的以太网环上的各条链路的带宽信息与倒换 信息的对应关系, 确定与所述带宽信息对应的倒换信息, 使得操作单元能够 根据所述倒换信息,对所述网络设备上参与所述至少一个 ERP实例的端口进 行倒换操作, 能够解决现有技术中只有在链路故障或人工强制倒换的情况下 才能触发环保护倒换的问题, 从而提高了环保护倒换的灵活性。 釆用本发明 提供的技术方案, 如果以太网环上链路的带宽发生变化, 能够利用带宽更高 的备用链路进行数据传输, 能够有效保证以太网环的业务容量达到最大化。
本发明另一实施例还提供了一种以太网环保护倒换系统, 可以包括如图
5、 6或 7对应的实施例提供的网络设备, 还包括另一网络设备, 用于向所述 网络设备发送带宽信息报文, 所述带宽信息报文中携带所述第一链路的带宽 信息。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 上述描 述的系统, 装置和单元的具体工作过程, 可以参考前述方法实施例中的对应 过程, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现时可 以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到另一个 系统, 或一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间 的耦合或直接耦合或通信连接可以是通过一些接口, 装置或单元的间接耦合 或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的, 作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或 者全部单元来实现本实施例方案的目的。
另外 ,在本发明各个实施例中的各功能单元可以集成在一个处理单元中 , 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单 元中。 上述集成的单元既可以釆用硬件的形式实现, 也可以釆用硬件加软件 功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元, 可以存储在一个计算机 可读取存储介质中。 上述软件功能单元存储在一个存储介质中, 包括若干指 令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例所述方法的部分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读存储器(Read-Only Memory, 简称 ROM ) 、 随机存取存储 器( Random Access Memory, 简称 RAM )、 磁碟或者光盘等各种可以存储 程序代码的介质。
最后应说明的是, 以上实施例仅用以说明本发明的技术方案, 而非对其 限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术 人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或 者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技 术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求 书
1、 一种以太网环保护倒换方法, 其特征在于, 包括:
节点获得所述节点所在以太网环上的第一链路的带宽信息, 确定所述第 一链路的带宽发生变化; 所述以太网环具有至少一个以太网环保护实例; 所述节点确定所述至少一个以太网环保护实例经由的所述节点的端口; 所述节点查询预先配置的所述以太网环上的各条链路的带宽信息与倒换 信息的对应关系, 通过所述节点的端口执行与所述第一链路的带宽信息对应 的倒换操作。
2、 根据权利要求 1所述的方法, 其特征在于,
所述节点存储所述以太网环上的各条链路的带宽信息与倒换信息的对应 关系, 所述以太网环上的各条链路的带宽信息与倒换信息的对应关系包括: 所述以太网环上的各条链路的带宽值与带宽索引的对应关系、 所述带宽 索引与所述至少一个以太网环保护实例的对应关系、 以及所述至少一个以太 网环保护实例与所述节点的端口需执行的倒换操作的对应关系。
3、根据权利要求 1或 2所述的方法, 其特征在于, 所述节点是所述第一 链路的端节点, 所述节点获得所述节点所在以太网环上各条链路的带宽信息 之前, 所述方法还包括:
所述节点检测所述第一链路的带宽。
4、根据权利要求 1或 2所述的方法, 其特征在于, 所述节点获得所述节 点所在以太网环上各条链路的带宽信息之前, 所述方法还包括:
所述节点接收所述第一链路的端节点发送的带宽信息报文, 所述带宽信 息报文中携带所述第一链路的带宽信息。
5、 一种计算机程序产品, 其特征在于, 包括计算机程序代码, 当一个计 算机单元执行所述计算机程序代码时, 所述计算机单元执行如权利要求 1~4 任一权利要求所记载的动作。
6、 一种网络设备, 其特征在于, 包括:
接收器,用于获得所述网络设备所在以太网环上的第一链路的带宽信息; 所述以太网环具有至少一个以太网环保护实例;
确定单元, 用于确定所述第一链路的带宽发生变化, 以及确定所述至少 一个以太网环保护实例经由的所述网络设备的端口; 操作单元, 用于查询预先配置的所述以太网环上的各条链路的带宽信息 与倒换信息的对应关系 , 通过所述网络设备的端口执行与所述第一链路的带 宽信息对应的倒换操作。
7、根据权利要求 6所述的网络设备, 其特征在于, 所述网络设备还包括 存储器, 用于
存储所述以太网环上的各条链路的带宽信息与倒换信息的对应关系, 所 述以太网环上的各条链路的带宽信息与倒换信息的对应关系包括:
所述以太网环上的各条链路的带宽值与带宽索引的对应关系、 所述带宽 索引与所述至少一个以太网环保护实例的对应关系、 以及所述至少一个以太 网环保护实例与所述网络设备的端口需执行的倒换操作的对应关系。
8、根据权利要求 6或 7所述的网络设备, 其特征在于, 所述网络设备是 所述第一链路的端网络设备, 所述网络设备还包括检测单元, 用于检测所述 第一链路的带宽。
9、根据权利要求 6或 7所述的网络设备, 其特征在于, 所述接收器还用 于
接收所述第一链路的端网络设备发送的带宽信息报文, 所述带宽信息报 文中携带所述第一链路的带宽信息。
10、 一种以太网环保护倒换系统, 其特征在于, 包括如权利要求 6或 7 所述的网络设备, 还包括另一网络设备, 用于向所述网络设备发送带宽信息 报文, 所述带宽信息报文中携带所述第一链路的带宽信息。
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