CN101227399A - Message transmission method, system and forwarding node - Google Patents

Abstract

Translated fromChinese

本发明公开了一种报文传输方法，包括：转发节点接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；将报文按照预先配置的备用转发表项，通过所述故障节点的保护节点传输至所述故障节点的下一跳节点。本发明还公开了一种报文传输系统和一种转发节点。应用本发明当以太网中任意转发节点发生故障，导致以太网隧道传输中断时，都能够通过该转发节点的上一跳节点、保护节点和下一跳节点形成的链路对报文进行转发，由此实现了对隧道中转发节点的分段保护，提高了隧道故障时报文传输的灵活性；由于仅对故障节点进行保护，因此隧道上的非故障节点仍然可用，提高了网络中的链路资源的可用性。

The invention discloses a message transmission method, comprising: a forwarding node receives a fault notification message sent by a faulty node, and the faulty node is the next hop node of the forwarding node; , transmitted to the next-hop node of the faulty node through the protection node of the faulty node. The invention also discloses a message transmission system and a forwarding node. Applying the present invention, when any forwarding node in the Ethernet fails, causing the Ethernet tunnel transmission to be interrupted, the message can be forwarded through the link formed by the previous hop node, the protection node and the next hop node of the forwarding node, In this way, the segmentation protection of the forwarding nodes in the tunnel is realized, and the flexibility of message transmission is improved when the tunnel fails; since only the faulty nodes are protected, the non-faulty nodes on the tunnel are still available, which improves the link reliability in the network. resource availability.

Description

Translated fromChinese

报文传输方法、系统及转发节点Message transmission method, system and forwarding node

技术领域technical field

本发明涉及网络通信技术领域，特别涉及一种报文传输方法、系统及转发节点。The invention relates to the technical field of network communication, in particular to a message transmission method, system and forwarding node.

背景技术Background technique

现有以太网在进行报文传输时，可以在源设备和目的设备之间建立隧道，应用该隧道，使报文从源设备通过中间设备转发至目的设备。以CE(Carrier Ethernet，电信级以太网)为例，CE可以采用PBB-TE隧道进行报文转发，报文转发基于Mac-in-Mac(MAC地址嵌套)封装技术，转发路径通过静态配置的方法建立。PBB-TE隧道的源设备在报文头中插入B-DA(Backbone Destination MAC Address，骨干网目的MAC地址)域，B-SA(Backbone Source MAC Address，骨干网源MAC地址)域，B-VLAN(Backbone VLAN，骨干网虚拟局域网)以及I-TAG(Service Instance TAG，服务实例标记)。网络中源设备和目的设备之间的中间设备上配置有MAC(Media Access Control，介质访问控制)转发表项，报文在中间设备上根据转发表项进行转发，上述转发路径相当于在源设备和目的设备之间建立了传输报文的隧道。When an existing Ethernet transmits a message, a tunnel can be established between a source device and a destination device, and the tunnel is used to forward the message from the source device to the destination device through an intermediate device. Taking CE (Carrier Ethernet, Carrier Ethernet) as an example, CE can use PBB-TE tunnel to forward packets. Packet forwarding is based on Mac-in-Mac (MAC address nesting) encapsulation technology. method build. The source device of the PBB-TE tunnel inserts the B-DA (Backbone Destination MAC Address, backbone network destination MAC address) domain, B-SA (Backbone Source MAC Address, backbone network source MAC address) domain, B-VLAN (Backbone VLAN, backbone network virtual local area network) and I-TAG (Service Instance TAG, service instance tag). The intermediate device between the source device and the destination device in the network is configured with a MAC (Media Access Control, Media Access Control) forwarding table item, and the message is forwarded on the intermediate device according to the forwarding table item. A tunnel for transmitting packets is established with the destination device.

如图1所示为现有技术中PBB-TE隧道的结构示意图，其中PE1为源设备(MAC地址为B-MAC1)，PE2为目的设备(MAC地址为B-MAC2)，P1至P6为用于转发报文的中间设备，在PE1和PE2之间包含两条隧道，其中主用隧道为从PE1开始，经过P1、P2、P3至PE2的转发路径，备用隧道为从PE1开始，经过P4、P5、P6至PE2的转发路径，为了转发报文时区别上述两条隧道，在预先配置时为主用隧道指定B-VLAN1，备用隧道指定B-VLAN2，使主、备两条隧道之间组成保护组。结合图1，在进行报文传输之前，需要对PBB-TE隧道关联的所有设备进行静态配置，配置的内容包括：在PE1和PE2上创建隧道实体，为主用隧道配置B-MAC1、B-MAC2、B-VLAN1，为备用隧道配置B-MAC1、B-MAC2、B-VLAN2，并指明隧道PE1和PE2上的出端口；在P1、P2、P3上的MAC转发表中配置关联B-MAC1、B-MAC2、B-VLAN1的转发表项，在P4、P5、P6上的MAC转发表中配置关联B-MAC1、B-MAC2、B-VLAN2的转发表项。PE1和PE2之间的报文默认在主用隧道上传输，因此对报文进行MAC地址封装时，在报文头中插入B-MAC1、B-MAC2和B-VLAN1，封装后的报文即可按照主用隧道P1、P2、P3上配置的MAC转发表项，从PE1传输到PE2。Figure 1 is a schematic structural diagram of a PBB-TE tunnel in the prior art, wherein PE1 is a source device (with MAC address B-MAC1), PE2 is a destination device (MAC address is B-MAC2), and P1 to P6 are user devices. It is an intermediate device for forwarding packets. There are two tunnels between PE1 and PE2. The primary tunnel starts from PE1 and passes through P1, P2, P3 to PE2. The backup tunnel starts from PE1 and passes through P4, For the forwarding path from P5, P6 to PE2, in order to distinguish the above two tunnels when forwarding packets, B-VLAN1 is specified for the active tunnel and B-VLAN2 is specified for the backup tunnel during pre-configuration, so that the two tunnels form a protection group. Referring to Figure 1, before packet transmission, all devices associated with the PBB-TE tunnel need to be statically configured. The configuration includes: creating tunnel entities on PE1 and PE2, and configuring B-MAC1 and B-MAC for the active tunnel. MAC2, B-VLAN1, configure B-MAC1, B-MAC2, and B-VLAN2 for the backup tunnel, and specify the outgoing ports on the tunnel PE1 and PE2; configure the associated B-MAC1 in the MAC forwarding tables on P1, P2, and P3 , B-MAC2, and B-VLAN1 forwarding entries, configure forwarding entries associated with B-MAC1, B-MAC2, and B-VLAN2 in the MAC forwarding tables on P4, P5, and P6. By default, packets between PE1 and PE2 are transmitted over the active tunnel. Therefore, when MAC address encapsulation is performed on packets, B-MAC1, B-MAC2, and B-VLAN1 are inserted into the packet headers. The encapsulated packets are It can be transmitted from PE1 to PE2 according to the MAC forwarding entries configured on the primary tunnels P1, P2, and P3.

结合图1，现有技术通过在隧道中发送CCM(Continuity CheckMessage，连通性检查消息)来检查隧道的连通性，例如PE2在主用隧道上向PE1周期性发送CCM，如果在预设的周期内PE1没有收到PE2发送的CCM消息，则认为主用隧道发生故障，而P1、P2、P3中任意一台中间设备发生故障都可能导致主用隧道发生故障。以P2发生故障为例，PE1由于没有在预设周期内收到PE2发送的CCM消息，因此确认主用隧道当前不可用，此时PE 1对报文进行MAC地址封装时，在报文头中插入B-MAC1、B-MAC2和B-VLAN2，该报文按照备用隧道上P4、P5、P6配置的MAC转发表项进行转发，以此实现报文传输的保护倒换。In conjunction with Figure 1, the existing technology checks the connectivity of the tunnel by sending CCM (Continuity CheckMessage, connectivity check message) in the tunnel. For example, PE2 periodically sends CCM to PE1 on the active tunnel. If PE1 does not receive the CCM message sent by PE2, it considers that the active tunnel is faulty, and the fault of any intermediate device among P1, P2, and P3 may cause the active tunnel to fail. Take the failure of P2 as an example. Because PE1 did not receive the CCM message sent by PE2 within the preset period, it confirmed that the active tunnel is currently unavailable. At this time, when PE 1 encapsulates the MAC address of the packet, the Insert B-MAC1, B-MAC2, and B-VLAN2, and the message is forwarded according to the MAC forwarding entries configured on P4, P5, and P6 on the backup tunnel, so as to realize the protection switching of message transmission.

由上述对现有技术的描述可知，以太网隧道故障时通过配置源设备和目的设备之间主用隧道和备用隧道的保护组，实现对以太网隧道端到端的保护，由于这种方式仅能进行全路径保护，而无法针对发生故障的具体节点或链路进行保护；并且主用隧道上并非所有的节点都发生故障时，全路径保护方式将使主用隧道上的非故障节点均不可用。From the above description of the prior art, it can be seen that when the Ethernet tunnel fails, the protection group of the active tunnel and the backup tunnel between the source device and the destination device can be configured to realize end-to-end protection of the Ethernet tunnel, because this method can only Carry out full-path protection, but cannot protect specific nodes or links that fail; and when not all nodes on the active tunnel fail, the full-path protection mode will make non-faulty nodes on the active tunnel unavailable .

发明内容Contents of the invention

本发明实施例的目的在于提供一种报文传输方法、系统及转发节点。The purpose of the embodiments of the present invention is to provide a message transmission method, system and forwarding node.

为实现本发明实施例的目的，本发明实施例提供如下技术方案：In order to achieve the purpose of the embodiments of the present invention, the embodiments of the present invention provide the following technical solutions:

一种报文传输方法，包括：A message transmission method, comprising:

转发节点接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；The forwarding node receives the fault notification message sent by the faulty node, and the faulty node is the next hop node of the forwarding node;

将报文按照预先配置的备用转发表项，通过所述故障节点的保护节点传输至所述故障节点的下一跳节点。The message is transmitted to the next-hop node of the faulty node through the protection node of the faulty node according to the pre-configured standby forwarding table entry.

一种报文传输系统，包括：转发节点、故障节点及其保护节点，A message transmission system, including: a forwarding node, a failure node and its protection node,

所述故障节点用于向其上一跳转发节点发送故障通知消息；The faulty node is used to send a fault notification message to its previous hop forwarding node;

所述转发节点包括：The forwarding nodes include:

接收单元，用于接收所述故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；a receiving unit, configured to receive a fault notification message sent by the faulty node, where the faulty node is a next-hop node of the forwarding node;

传输单元，用于将报文按照预先配置的备用转发表项，传输至所述故障节点的保护节点；A transmission unit, configured to transmit the message to the protection node of the faulty node according to the pre-configured standby forwarding table entry;

所述保护节点用于将所述报文传输至所述故障节点的下一跳转发节点。The protection node is configured to transmit the message to a next-hop forwarding node of the faulty node.

一种转发节点，包括：A forwarding node, comprising:

接收单元，用于接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；a receiving unit, configured to receive a fault notification message sent by a faulty node, where the faulty node is a next-hop node of the forwarding node;

传输单元，用于将报文按照预先配置的备用转发表项，传输至所述故障节点的保护节点。The transmission unit is configured to transmit the message to the protection node of the faulty node according to the pre-configured standby forwarding table entry.

由以上本发明实施例提供的技术方案可见，本发明实施例中转发节点接收故障节点发送的故障通知消息后，将报文按照预先配置的备用转发表项，通过该故障节点的保护节点传输至该故障节点的下一跳节点。应用本发明实施例进行报文传输时，通过为转发节点配置保护节点，使得任意转发节点发生故障导致以太网隧道传输中断时，都能够通过该转发节点的上一跳节点、保护节点和下一跳节点形成的链路对报文进行转发，由此实现了对隧道中转发节点的分段保护，提高了隧道故障时报文传输的灵活性；由于仅对故障节点进行保护，因此隧道上的非故障节点仍然可用，提高了网络中的链路资源的可用性。It can be seen from the above technical solutions provided by the embodiments of the present invention that in the embodiments of the present invention, after receiving the fault notification message sent by the faulty node, the forwarding node transmits the message through the protection node of the faulty node to the The next hop node of the failed node. When applying the embodiment of the present invention for message transmission, by configuring the protection node for the forwarding node, when any forwarding node fails and the transmission of the Ethernet tunnel is interrupted, it can pass through the previous hop node, the protection node and the next node of the forwarding node. The link formed by the hop node forwards the message, thereby realizing the segmentation protection of the forwarding node in the tunnel and improving the flexibility of message transmission when the tunnel fails; because only the faulty node is protected, the non- The failed node is still available, improving the availability of link resources in the network.

附图说明Description of drawings

图1为现有技术中PBB-TE隧道的报文传输结构示意图；FIG. 1 is a schematic diagram of a message transmission structure of a PBB-TE tunnel in the prior art;

图2为本发明报文传输方法的一种实施例流程图；Fig. 2 is a flow chart of an embodiment of the message transmission method of the present invention;

图3为本发明报文传输方法的另一种实施例流程图；FIG. 3 is a flow chart of another embodiment of the message transmission method of the present invention;

图4为本发明报文传输方法的又一种实施例流程图；FIG. 4 is a flow chart of another embodiment of the message transmission method of the present invention;

图5为本发明中PBB-TE隧道的报文传输结构示意图；FIG. 5 is a schematic diagram of a message transmission structure of a PBB-TE tunnel in the present invention;

图6为本发明报文传输系统的一种实施例框图；Fig. 6 is a block diagram of an embodiment of the message transmission system of the present invention;

图7为本发明报文传输系统的另一种实施例框图；FIG. 7 is a block diagram of another embodiment of the message transmission system of the present invention;

图8为本发明转发节点的一种实施例框图；FIG. 8 is a block diagram of an embodiment of a forwarding node in the present invention;

图9为本发明转发节点的又一种实施例框图。Fig. 9 is a block diagram of another embodiment of a forwarding node according to the present invention.

具体实施方式Detailed ways

本发明实施例提供了一种报文传输方法、系统及转发节点，转发节点接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点，将报文按照预先配置的备用转发表项，通过所述故障节点的保护节点传输至所述故障节点的下一跳节点，由此实现了对隧道中转发节点的分段保护，提高了隧道故障时报文传输的灵活性。The embodiment of the present invention provides a message transmission method, system and forwarding node. The forwarding node receives the fault notification message sent by the faulty node. The faulty node is the next hop node of the forwarding node. The standby forwarding table entry of the faulty node is transmitted to the next hop node of the faulty node through the protection node of the faulty node, thereby realizing the segmentation protection of the forwarding node in the tunnel and improving the flexibility of message transmission when the tunnel is faulty .

需要说明的是，本发明通过故障节点的保护节点进行报文传输的实施例与重路由技术不同，重路由技术主要应用在IP网络中，IP网络中的每一跳路由节点根据路由协议动态配置路由表，并根据该路由表动态寻找下一跳路由节点。具体的说，IP网络中从源节点到目的节点链路上的每一个路由节点，均根据路由协议动态配置路由表，假设当前路由节点有多个下一跳路由节点，则该路由表中的下一跳路由节点按照优先级的顺序排列，当该当前路由节点发生故障时，根据路由表中的优先级顺序动态选择下一跳路由节点。It should be noted that the embodiment of the present invention that transmits messages through the protection node of the faulty node is different from the rerouting technology. The rerouting technology is mainly applied in the IP network, and each hop routing node in the IP network is dynamically configured according to the routing protocol. Routing table, and dynamically find the next-hop routing node according to the routing table. Specifically, each routing node on the link from the source node to the destination node in the IP network dynamically configures the routing table according to the routing protocol. Assuming that the current routing node has multiple next-hop routing nodes, the routing table in the routing table The next-hop routing nodes are arranged in the order of priority, and when the current routing node fails, the next-hop routing node is dynamically selected according to the priority order in the routing table.

与重路由技术不同的是，本发明报文传输实施例主要应用于传统以太网中，传统以太网采用静态配置的方式，每一跳路由节点上保存由网络管理员预先配置的下一跳路由节点，并根据该静态配置的结果传输报文。因此，本发明报文传输实施例中的转发节点上预先配置的备用转发表项均由网络管理员通过静态方式配置。Different from the rerouting technology, the message transmission embodiment of the present invention is mainly applied in the traditional Ethernet, and the traditional Ethernet adopts a static configuration mode, and each hop routing node saves the next hop route pre-configured by the network administrator. Nodes, and transmit messages according to the result of the static configuration. Therefore, the standby forwarding entries pre-configured on the forwarding node in the message transmission embodiment of the present invention are all statically configured by the network administrator.

为了使本技术领域的人员更好地理解本发明实施例提供的技术方案，下面结合附图和具体实施方式对本发明实施例提供的技术方案作进一步的详细说明。In order to enable those skilled in the art to better understand the technical solutions provided by the embodiments of the present invention, the technical solutions provided by the embodiments of the present invention will be further described in detail below in conjunction with the drawings and specific implementation methods.

本发明报文传输方法的一种实施例流程如图2所示：A kind of embodiment flow process of message transmission method of the present invention is as shown in Figure 2:

框图201：转发节点接收故障节点发送的故障通知消息。Block Diagram 201: the forwarding node receives the failure notification message sent by the failure node.

其中，转发节点为以太网链路隧道上除源节点和目的节点之外的节点，并且转发节点和故障节点属于同一个以太网隧道中不同转发层上的节点，通常故障节点为该转发节点的下一跳节点。Among them, the forwarding node is a node other than the source node and the destination node on the Ethernet link tunnel, and the forwarding node and the faulty node belong to nodes on different forwarding layers in the same Ethernet tunnel, and usually the faulty node is the node of the forwarding node next hop node.

框图202：将报文按照预先配置的备用转发表项，通过该故障节点的保护节点传输至该故障节点的下一跳节点。Block Diagram 202: The message is transmitted to the next-hop node of the faulty node through the protection node of the faulty node according to the pre-configured standby forwarding table entry.

具体的，在转发节点上预先配置了MAC转发表，该MAC转发表中包含主用转发表项，正常情况下报文按照主用转发表项在主用隧道上传输；该MAC转发表中还包含至少一个备用转发表项，故障情况下报文按照一个备用转发表项，通过故障节点的保护节点和保护链路传输到主用隧道上该故障节点的下一跳节点。Specifically, a MAC forwarding table is pre-configured on the forwarding node, and the MAC forwarding table contains the active forwarding table entries. Under normal circumstances, packets are transmitted on the active tunnel according to the active forwarding table entries; Contains at least one backup forwarding table entry. In case of failure, the message is transmitted to the next hop node of the faulty node on the active tunnel through the protection node and the protection link of the failure node according to a backup forwarding table entry.

其中，主用转发表项和备用转发表项中包含用于报文传输的源节点地址、目的节点地址、VLAN标识。Wherein, the active forwarding table entry and the standby forwarding table entry include the source node address, destination node address, and VLAN ID used for message transmission.

其中，故障节点与其保护节点为以太网中同一转发层上的节点。Wherein, the fault node and its protection node are nodes on the same forwarding layer in the Ethernet.

本发明报文传输方法的另一种实施例流程如图3所示，该实施例示出了以太网中的某个节点发生故障，导致以太网隧道故障时的报文传输的过程：Another embodiment flow process of the message transmission method of the present invention is shown in Figure 3, and this embodiment has shown the process of message transmission when a certain node in the Ethernet breaks down, causing the Ethernet tunnel failure:

框图301：在转发节点上预先配置MAC转发表。Block diagram 301: Pre-configure a MAC forwarding table on a forwarding node.

转发节点上配置的MAC转发表用于在接收到其上一跳节点传输的报文后，根据该MAC转发表传输报文至下一跳节点。本发明实施例的MAC转发表中配置了一个主用转发表项，该主用转发表项中包含报文传输的源节点地址、目的节点地址和VLAN标识，该主用转发表项对应该转发节点的下一跳节点；MAC转发表中还配置了至少一个备用转发表项，备用转发表项中也包含了报文传输的源节点地址、目的节点地址和VLAN标识，备用转发表项对应该转发节点下一跳节点的保护节点。转发节点的下一跳节点以及该下一跳节点的保护节点位于以太网中同一转发层上。The MAC forwarding table configured on the forwarding node is used to transmit the message to the next hop node according to the MAC forwarding table after receiving the message transmitted by the previous hop node. An active forwarding table entry is configured in the MAC forwarding table of the embodiment of the present invention, and the main forwarding table entry includes the source node address, destination node address and VLAN identification of message transmission, and the main forwarding table entry corresponds to the forwarding table entry. The next hop node of the node; at least one standby forwarding entry is also configured in the MAC forwarding table, which also includes the source node address, destination node address and VLAN ID of the message transmission, and the standby forwarding entry corresponds to The protection node of the next hop node of the forwarding node. The next hop node of the forwarding node and the protection node of the next hop node are located on the same forwarding layer in the Ethernet.

本发明实施例中传输的报文采用MAC-in-MAC封装，封装时在报文头中插入源节点地址、目的节点地址和VLAN标识。报文传输到各个转发节点时，根据报文头中的信息转发该报文。The message transmitted in the embodiment of the present invention adopts MAC-in-MAC encapsulation, and the source node address, destination node address and VLAN identification are inserted into the message header during encapsulation. When the message is transmitted to each forwarding node, the message is forwarded according to the information in the message header.

框图302：判断以太网隧道上是否检测到故障节点，若是，则执行框图303；否则，执行框图308。Block Diagram 302: Judging whether a faulty node is detected on the Ethernet tunnel, if so, execute Block Diagram 303; otherwise, execute Block Diagram 308.

源节点与目的节点之间建立的以太网隧道上包含若干个转发节点，转发节点分别位于以太网中不同的转发层，报文通过转发节点的层层传输从源节点发送至目的节点。但是，上述转发节点中的任意一个转发节点发生故障时，都将导致以太网隧道发生故障，使得报文传输中断，因此需要实时检测以太网隧道上的转发节点是否发生故障。The Ethernet tunnel established between the source node and the destination node contains several forwarding nodes. The forwarding nodes are respectively located at different forwarding layers in the Ethernet. Messages are sent from the source node to the destination node through layer-by-layer transmission of the forwarding nodes. However, when any one of the above forwarding nodes fails, the Ethernet tunnel will fail and the message transmission will be interrupted. Therefore, it is necessary to detect in real time whether the forwarding node on the Ethernet tunnel fails.

通常为了检测转发节点是否发生故障，由目的节点向源节点周期性发送CCM消息来检查隧道的连通性，当源节点在预设周期内没有收到CCM消息时，则确定检测到故障节点，否则说明以太网隧道正常。Usually, in order to detect whether the forwarding node fails, the destination node periodically sends CCM messages to the source node to check the connectivity of the tunnel. When the source node does not receive the CCM message within the preset period, it is determined that the faulty node is detected, otherwise It indicates that the Ethernet tunnel is normal.

框图303：故障节点向其上一跳转发节点发送故障通知消息。Block diagram 303: the faulty node sends a fault notification message to its previous hop forwarding node.

故障节点反向传输故障通知消息到其上一跳转发节点，该故障通知消息用于告知故障节点的位置，进一步还可以用于告知故障的具体类型。The faulty node reversely transmits the fault notification message to its upper hop forwarding node, and the fault notification message is used to inform the location of the faulty node, and further can be used to notify the specific type of the fault.

框图304：该转发节点查找MAC转发表中的备用转发表项。Block Diagram 304: The forwarding node looks up the standby forwarding entry in the MAC forwarding table.

转发节点接收到故障通知消息后，根据该消息中的信息确定故障节点的位置，并查找预先配置的MAC转发表，由于当前故障节点所在的以太网链路不可用，因此报文无法再根据MAC转发表中的主用表项进行转发，而需要查找MAC转发表中的备用转发表项，并通过该备用转发表项进行报文传输。After the forwarding node receives the fault notification message, it determines the location of the faulty node according to the information in the message, and searches the pre-configured MAC forwarding table. Since the Ethernet link where the current faulty node is located is unavailable, the message cannot be forwarded according to the MAC address. The main table entry in the forwarding table is forwarded, but it is necessary to search for the standby forwarding table entry in the MAC forwarding table, and transmit the message through the standby forwarding table entry.

当转发节点的MAC转发表中仅配置了一个备用转发表项时，查找该备用转发表项即可；当转发节点的MAC转发表中配置了多个备用转发表项时，可以根据预先设置的优先级从中选择一个备用转发表项。When only one standby forwarding entry is configured in the MAC forwarding table of the forwarding node, it is sufficient to search for the standby forwarding table; when multiple standby forwarding entries are configured in the MAC forwarding table of the forwarding node, the Priority to choose an alternate forwarding entry from.

框图305：将该备用转发表项设置为有效，并将主用转发表项设置为无效。Block diagram 305: set the standby forwarding entry to be valid, and set the active forwarding entry to be invalid.

由于无法通过主用转发表项进行报文传输，因此将主用转发表项设置为无效，同时将查找到的一个备用转发表项设置为有效。Since message transmission cannot be performed through the active forwarding entry, the active forwarding entry is set to be invalid, and a found standby forwarding entry is set to be valid.

框图306：将报文按照该备用转发表项传输至该故障节点的保护节点。Block diagram 306: transmit the message to the protection node of the faulty node according to the backup forwarding entry.

备用转发表项中的转发端口对应于故障节点的保护节点，报文按照该备用转发表项传输到该保护节点。The forwarding port in the standby forwarding entry corresponds to the protection node of the faulty node, and the message is transmitted to the protection node according to the standby forwarding entry.

框图307：保护节点将该报文传输至该故障节点的下一跳转发节点，结束当前流程。Block diagram 307: the protection node transmits the message to the next-hop forwarding node of the faulty node, and ends the current process.

保护节点即为以太网中的一个转发节点，该保护节点上配置的转发表项中包含源节点地址、目的节点地址和VLAN标识，该转发表项对应于故障节点的下一跳节点。相当于故障节点的上一跳节点、保护节点、下一跳节点之间形成的一段链路用于保护该故障节点与其上一跳节点和下一跳节点之间的链路。The protection node is a forwarding node in the Ethernet, and the forwarding table configured on the protecting node includes the address of the source node, the address of the destination node and the VLAN ID, and the forwarding table corresponds to the next-hop node of the faulty node. A section of link formed between the previous hop node, the protection node and the next hop node corresponding to the faulty node is used to protect the link between the faulty node and its previous hop node and next hop node.

框图308：将报文按照主用转发表项在主用隧道上传输，结束当前流程。Block diagram 308: transmit the message on the active tunnel according to the active forwarding entry, and end the current process.

报文传输到故障节点的下一跳节点后，该下一跳节点以及后续转发节点仍然按照配置的主用转发表项在未发生故障的以太网隧道上传输该报文，直至将该报文传输至目的节点。After the message is transmitted to the next hop node of the faulty node, the next hop node and subsequent forwarding nodes still transmit the message on the unfailed Ethernet tunnel according to the configured active forwarding table entry until the message transmitted to the destination node.

本发明报文传输方法的又一种流程如图4所示，该实施例示出了从检测到以太网隧道故障到故障恢复时的报文传输流程：Yet another flow process of the message transmission method of the present invention is as shown in Figure 4, and this embodiment has shown the message transmission process from detecting Ethernet tunnel fault to fault recovery:

框图401：在转发节点上预先配置MAC转发表。Block diagram 401: Pre-configure a MAC forwarding table on a forwarding node.

转发节点上配置的MAC转发表用于在接收到其上一跳节点传输的报文后，根据该MAC转发表传输报文至下一跳节点。在MAC转发表中配置了一个主用转发表项，该主用转发表项中包含报文传输的源节点地址、目的节点地址和VLAN标识，该主用转发表项对应该转发节点的下一跳节点；MAC转发表中还配置了至少一个备用转发表项，备用转发表项中也包含了报文传输的源节点地址、目的节点地址和VLAN标识，备用转发表项对应该转发节点下一跳节点的保护节点。转发节点的下一跳节点以及该下一跳节点的保护节点位于以太网中同一转发层上。The MAC forwarding table configured on the forwarding node is used to transmit the message to the next hop node according to the MAC forwarding table after receiving the message transmitted by the previous hop node. An active forwarding entry is configured in the MAC forwarding table. The active forwarding entry contains the source node address, destination node address and VLAN ID of the message transmission. The active forwarding entry corresponds to the next jump node; MAC forwarding table is also configured with at least one backup forwarding table entry, which also includes the source node address, destination node address and VLAN ID of message transmission in the backup forwarding table entry, and the backup forwarding table entry corresponds to the next forwarding node The guard node of the hop node. The next hop node of the forwarding node and the protection node of the next hop node are located on the same forwarding layer in the Ethernet.

框图402：判断以太网隧道上是否检测到故障节点，若是，则执行框图403；否则，执行框图408。Block Diagram 402: Judging whether a faulty node is detected on the Ethernet tunnel, if so, execute Block Diagram 403; otherwise, execute Block Diagram 408.

源节点与目的节点之间建立的以太网隧道上包含若干个转发节点，上述转发节点中的任意一个转发节点发生故障时，都将导致以太网隧道发生故障，使得报文传输中断，因此通过由目的节点向源节点周期性发送CCM消息来确定是否检测到故障节点。The Ethernet tunnel established between the source node and the destination node contains several forwarding nodes. When any one of the above forwarding nodes fails, it will cause the Ethernet tunnel to fail and the message transmission will be interrupted. Therefore, through the The destination node periodically sends CCM messages to the source node to determine whether a faulty node is detected.

框图403：故障节点向其上一跳转发节点发送故障通知消息。Block diagram 403: the faulty node sends a fault notification message to its previous hop forwarding node.

框图404：该转发节点按照MAC转发表中的备用转发表项，将报文传输至该故障节点的保护节点。Block diagram 404: the forwarding node transmits the message to the protection node of the faulty node according to the backup forwarding entry in the MAC forwarding table.

转发节点接收到故障通知消息后，根据该消息中的信息确定故障节点的位置，并查找预先配置的MAC转发表，由于当前故障节点所在的以太网链路不可用，因此报文无法再根据MAC转发表中的主用表项进行转发，而需要查找MAC转发表中的备用转发表项，并通过该备用转发表项进行报文传输。After the forwarding node receives the fault notification message, it determines the location of the faulty node according to the information in the message, and searches the pre-configured MAC forwarding table. Since the Ethernet link where the current faulty node is located is unavailable, the message cannot be forwarded according to the MAC address. The main table entry in the forwarding table is forwarded, but it is necessary to search for the standby forwarding table entry in the MAC forwarding table, and transmit the message through the standby forwarding table entry.

由于无法通过主用转发表项进行报文传输，因此将主用转发表项设置为无效，同时将查找到的一个备用转发表项设置为有效。备用转发表项中的转发端口对应于故障节点的保护节点，报文按照该备用转发表项传输到该保护节点。Since message transmission cannot be performed through the active forwarding entry, the active forwarding entry is set to be invalid, and a found standby forwarding entry is set to be valid. The forwarding port in the standby forwarding entry corresponds to the protection node of the faulty node, and the message is transmitted to the protection node according to the standby forwarding entry.

框图405：保护节点将该报文传输至该故障节点的下一跳转发节点。Block diagram 405: the protection node transmits the message to the next-hop forwarding node of the faulty node.

保护节点上配置的转发表项中包含源节点地址、目的节点地址和VLAN标识，该转发表项对应于故障节点的下一跳节点。The forwarding entry configured on the protection node includes a source node address, a destination node address and a VLAN ID, and the forwarding entry corresponds to a next-hop node of the faulty node.

框图406：判断该故障节点的故障是否恢复，若是，则执行框图407；否则，返回框图404。Block Diagram 406: Judging whether the failure of the faulty node is recovered, if so, execute Block Diagram 407; otherwise, return to Block Diagram 404.

框图407：转发节点将主用转发表项设置为有效，并将备用转发表项设置为无效。Block diagram 407: the forwarding node sets the active forwarding entry as valid, and sets the standby forwarding entry as invalid.

由于检测到故障节点的故障已经恢复，因此故障节点向其上一跳转发节点发送故障恢复消息，接收到该故障恢复消息的上一跳转发节点查找MAC转发表，然后将MAC转发表中的主用转发表项从无效设置为有效，并将已经设置为有效的备用转发表项设置为无效，使得报文能够重新按照主用转发表项进行传输。Since it is detected that the failure of the faulty node has recovered, the faulty node sends a fault recovery message to its previous hop forwarding node, and the previous hop forwarding node that receives the faulty recovery message searches the MAC forwarding table, and then puts the MAC forwarding table in the MAC forwarding table. Set the active forwarding table entry from invalid to valid, and set the standby forwarding table entry that has been set to valid to invalid, so that the message can be transmitted according to the active forwarding table entry again.

框图408：将报文按照主用转发表项在主用隧道上传输，结束当前流程。Block Diagram 408: Transmit the message on the active tunnel according to the active forwarding entry, and end the current process.

当源节点重新发送报文时，由于主用隧道上的所有转发节点均正常，因此报文按照各个转发节点上配置的主用转发表项在主用隧道上传输，直至将报文传输至目的节点。When the source node resends the packet, since all forwarding nodes on the active tunnel are normal, the packet is transmitted on the active tunnel according to the active forwarding table entries configured on each forwarding node until the packet is transmitted to the destination node.

结合上述本发明方法实施例的一种以太网隧道结构示意图如图5所示：其中PE1为源设备(MAC地址为B-MAC1)，PE2为目的设备(MAC地址为B-MAC2)，P1至P6为用于转发报文的中间设备，在PE1和PE2之间用于报文传输的隧道为从PE1开始，经过P1、P2、P3至PE2的转发路径，在P1至P6上分别配置了MAC转发表，假设该MAC转发表中包含一个主用转发表项和一个备用转发表项，以P1为例，其配置的MAC转发表如下表1所示：A schematic diagram of an Ethernet tunnel structure combined with the above method embodiment of the present invention is shown in Figure 5: wherein PE1 is a source device (MAC address is B-MAC1), PE2 is a destination device (MAC address is B-MAC2), and P1 to P6 is an intermediate device used to forward packets. The tunnel used for packet transmission between PE1 and PE2 starts from PE1 and passes through P1, P2, P3 to PE2. MAC addresses are configured on P1 to P6 respectively. Forwarding table, assuming that the MAC forwarding table contains a primary forwarding table entry and a standby forwarding table entry, taking P1 as an example, its configured MAC forwarding table is shown in Table 1 below:

表1Table 1

  表项名称table entry name源节点地址source node address目的节点地址destination node addressVLAN标识VLAN ID对应节点corresponding node主用转发表项Primary forwarding entry  B-MAC1B-MAC1  B-MAC2B-MAC2  B-VLAN1B-VLAN1    P2P2备用转发表项alternate forwarding entry  B-MAC1B-MAC1  B-MAC2B-MAC2  B-VLAN1B-VLAN1    P5P5

结合图5和上表1可知，主用转发表项对应于P2，备用转发表项对应于P5，P5为P2的保护设备，且P5和P2均为以太网中的二层转发设备。下面以P2发生故障为例，详细描述报文的传输过程：Combining Figure 5 and Table 1 above, it can be seen that the active forwarding table entry corresponds to P2, the standby forwarding table entry corresponds to P5, and P5 is the protection device of P2, and both P5 and P2 are Layer 2 forwarding devices in the Ethernet. The following takes the failure of P2 as an example to describe the message transmission process in detail:

当PE1与PE2之间的隧道正常时，各个中间设备将配置的主用转发表项设置为有效，备用转发表项设置为无效，报文按照转发路径从PE1开始，经过P1、P2、P3后传输至PE2。当检测到P2发生故障时，P2向P1发送故障通知消息，P1接收到该消息后查找如表1所示的MAC转发表，并将该MAC转发表中的主用转发表项设置为无效，同时将备用转发表项设置为有效，后续报文从PE1发送至P1后，P1根据备用转发表项对应的转发节点，将报文转发到P5上，P5按照其配置的主用转发表项将报文转发到P3，然后由P3按照主用转发表项将报文转发到PE2。When the tunnel between PE1 and PE2 is normal, each intermediate device sets the configured primary forwarding entry to valid, and the backup forwarding entry to invalid, and the packet starts from PE1 and passes through P1, P2, and P3 according to the forwarding path. Transfer to PE2. When detecting that P2 fails, P2 sends a failure notification message to P1. After receiving the message, P1 looks up the MAC forwarding table shown in Table 1, and sets the active forwarding entry in the MAC forwarding table to be invalid. At the same time, set the standby forwarding entry to be valid. After the subsequent message is sent from PE1 to P1, P1 forwards the message to P5 according to the forwarding node corresponding to the standby forwarding The packet is forwarded to P3, and then P3 forwards the packet to PE2 according to the active forwarding entry.

当检测到P2故障恢复后，由P2向P1发送故障恢复消息，P1将表1中的主用转发表项设置为有效，将备用转发表项设置为无效，后续报文按照各个中间设备上配置的主用转发表项从PE1开始，依次从P1、P2、P3传输至PE2。When P2 is detected to recover from the failure, P2 sends a failure recovery message to P1. P1 sets the active forwarding entry in Table 1 to valid, and sets the standby forwarding entry to invalid. Subsequent messages are configured according to the configuration on each intermediate device. The primary forwarding entries of the IP address start from PE1, and are transmitted from P1, P2, and P3 to PE2 in sequence.

与本发明报文传输方法实施例相对应，本发明还公开了一种报文传输系统的实施例。Corresponding to the embodiment of the message transmission method of the present invention, the present invention also discloses an embodiment of a message transmission system.

本发明报文传输系统的一种实施例框图如图6所示。A block diagram of an embodiment of the message transmission system of the present invention is shown in FIG. 6 .

该系统包括：转发节点610、故障节点620和保护节点630。The system includes: a forwardingnode 610 , a failure node 620 and aprotection node 630 .

其中，故障节点620用于向其上一跳转发节点610发送故障通知消息。转发节点610包括接收单元611，用于接收所述故障节点620发送的故障通知消息；传输单元612，用于将报文按照预先配置的备用转发表项，传输至所述故障节点620的保护节点630。所述保护节点630用于将所述报文传输至所述故障节点620的下一跳转发节点。Wherein, the faulty node 620 is configured to send a fault notification message to its lasthop forwarding node 610 . The forwardingnode 610 includes a receivingunit 611, configured to receive the fault notification message sent by the faulty node 620; atransmission unit 612, configured to transmit the message to the protection node of the faulty node 620 according to the pre-configuredstandby forwarding entry 630. Theprotection node 630 is configured to transmit the packet to a next-hop forwarding node of the faulty node 620 .

本发明报文传输系统的另一种实施例框图如图7所示。A block diagram of another embodiment of the message transmission system of the present invention is shown in FIG. 7 .

该系统包括：转发节点710、故障节点720以及保护节点730。The system includes: a forwardingnode 710 , afailure node 720 and aprotection node 730 .

其中，转发节点710包括：配置单元711，用于预先配置MAC转发表，所述MAC转发表中包含主用转发表项和至少一个备用转发表项；接收单元712，用于接收所述故障节点720发送的故障通知消息，所述故障节点720为所述转发节点710的下一跳节点；设置单元713，用于将所述主用转发表项设置为无效，并将一个所述备用转发表项设置为有效；传输单元714，用于将报文按照预先配置的备用转发表项，传输至所述故障节点720的保护节点730；判断单元715，用于接收到故障恢复消息时，判断所述故障节点720的故障恢复，此时设置单元713进一步用于将所述主用转发表项设置为有效，并将所述备用转发表项设置为无效，传输单元714进一步用于将所述报文按照所述主用转发表项进行传输。Wherein, the forwardingnode 710 includes: aconfiguration unit 711, configured to pre-configure a MAC forwarding table, the MAC forwarding table includes an active forwarding table item and at least one standby forwarding table item; a receivingunit 712, configured to receive the faulty node The fault notification message sent by 720, thefaulty node 720 is the next hop node of the forwardingnode 710; thesetting unit 713 is configured to set the active forwarding entry to be invalid, and set one of the standby forwarding table The item is set to be valid; thetransmission unit 714 is used to transmit the message to theprotection node 730 of thefaulty node 720 according to the pre-configured standby forwarding table item; the judgingunit 715 is used to judge the The failure recovery of thefaulty node 720 is described above. At this time, thesetting unit 713 is further used to set the active forwarding entry to valid, and the standby forwarding entry to be invalid, and thetransmission unit 714 is further used to set the report The text is transmitted according to the primary forwarding entry.

与本发明报文传输方法和系统的实施例相对应，本发明还提供了一种转发节点的实施例。Corresponding to the embodiments of the message transmission method and system of the present invention, the present invention also provides an embodiment of a forwarding node.

本发明转发节点的一种实施例框图如图8所示，该转发节点包括：接收单元810和传输单元820。An embodiment block diagram of a forwarding node in the present invention is shown in FIG. 8 , and the forwarding node includes: a receivingunit 810 and a transmittingunit 820 .

其中，接收单元810用于接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；传输单元820用于将报文按照预先配置的备用转发表项，传输至所述故障节点的保护节点。Wherein, the receivingunit 810 is used to receive the failure notification message sent by the failure node, and the failure node is the next hop node of the forwarding node; thetransmission unit 820 is used to transmit the message to the A protection node for the faulty node.

本发明转发节点的另一种实施例框图如图9所示，该转发节点包括：配置单元910、接收单元920、设置单元930、传输单元940和判断单元950。Another embodiment block diagram of the forwarding node of the present invention is shown in FIG. 9 , the forwarding node includes: aconfiguration unit 910 , a receivingunit 920 , asetting unit 930 , atransmission unit 940 and ajudging unit 950 .

其中，配置单元910用于预先配置MAC转发表，所述MAC转发表中包含主用转发表项和至少一个备用转发表项；接收单元920用于接收所述故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；设置单元930用于将所述主用转发表项设置为无效，并将一个所述备用转发表项设置为有效；传输单元940用于将报文按照预先配置的备用转发表项，传输至所述故障节点的保护节点；判断单元950用于接收到故障恢复消息时，判断所述故障节点的故障恢复；当所述故障节点故障恢复时，所述设置单元930进一步用于将所述主用转发表项设置为有效，并将所述备用转发表项设置为无效；所述传输单元940进一步用于，将所述报文按照所述主用转发表项进行传输。Wherein, theconfiguration unit 910 is used to pre-configure the MAC forwarding table, and the MAC forwarding table includes an active forwarding table entry and at least one standby forwarding table entry; the receivingunit 920 is used to receive the fault notification message sent by the faulty node, the The faulty node is the next hop node of the forwarding node; thesetting unit 930 is used to set the active forwarding entry to be invalid, and set one of the backup forwarding entries to be valid; thetransmission unit 940 is used to set The message is transmitted to the protection node of the faulty node according to the pre-configured standby forwarding table item; the judgingunit 950 is used to judge the fault recovery of the faulty node when receiving the fault recovery message; when the faulty node recovers from the fault , thesetting unit 930 is further configured to set the active forwarding entry to valid, and the standby forwarding entry to be invalid; thetransmission unit 940 is further configured to transmit the message according to the The master uses forwarding entries for transmission.

通过本发明实施例的描述可知，应用本发明实施例进行报文传输时，通过为转发节点配置保护节点，使得任意转发节点发生故障导致以太网隧道传输中断时，都能够通过该转发节点的上一跳节点、保护节点和下一跳节点形成的链路对报文进行转发，由此实现了对隧道中转发节点的分段保护，提高了隧道故障时报文传输的灵活性；由于仅对故障节点进行保护，因此隧道上的非故障节点仍然可用，提高了网络中的链路资源的可用性。From the description of the embodiment of the present invention, it can be seen that when the embodiment of the present invention is used for message transmission, by configuring the protection node for the forwarding node, when any forwarding node fails and the transmission of the Ethernet tunnel is interrupted, it can pass through the forwarding node. The link formed by the first-hop node, the protection node and the next-hop node forwards the message, thereby realizing the segmentation protection of the forwarding node in the tunnel and improving the flexibility of message transmission when the tunnel fails; Nodes are protected, so non-faulty nodes on the tunnel are still available, improving the availability of link resources in the network.

本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，包括如下步骤：转发节点接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；将报文按照预先配置的备用转发表项，通过所述故障节点的保护节点传输至所述故障节点的下一跳节点。所述的存储介质，如：ROM/RAM、磁碟、光盘等。Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be executed during execution , including the following steps: the forwarding node receives the failure notification message sent by the failure node, and the failure node is the next hop node of the forwarding node; the message is passed through the failure node according to the pre-configured standby forwarding table The protection node transmits to the next hop node of the faulty node. The storage medium, such as: ROM/RAM, magnetic disk, optical disk, etc.

虽然通过实施例描绘了本发明，本领域普通技术人员知道，本发明有许多变形和变化而不脱离本发明的精神，希望所附的权利要求包括这些变形和变化而不脱离本发明的精神。While the invention has been described by way of example, those skilled in the art will appreciate that there are many variations and changes to the invention without departing from the spirit of the invention, and it is intended that the appended claims cover such variations and changes without departing from the spirit of the invention.

Claims (14)

Translated fromChinese

1.一种报文传输方法，其特征在于，包括：1. A message transmission method, characterized in that, comprising:转发节点接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；The forwarding node receives the fault notification message sent by the faulty node, and the faulty node is the next hop node of the forwarding node;将报文按照预先配置的备用转发表项，通过所述故障节点的保护节点传输至所述故障节点的下一跳节点。The message is transmitted to the next-hop node of the faulty node through the protection node of the faulty node according to the pre-configured standby forwarding table entry.2.根据权利要求1所述的方法，其特征在于，进一步包括：2. The method according to claim 1, further comprising:在所述转发节点上预先配置MAC转发+表，所述MAC转发表中包含主用转发表项和至少一个备用转发表项。A MAC forwarding+table is pre-configured on the forwarding node, and the MAC forwarding table includes an active forwarding entry and at least one standby forwarding entry.3.根据权利要求2所述的方法，其特征在于，所述转发表项包含：用于报文传输的源节点地址、目的节点地址、虚拟局域网VLAN标识。3. The method according to claim 2, wherein the forwarding entry includes: a source node address for message transmission, a destination node address, and a virtual local area network (VLAN) identifier.4.根据权利要求2所述的方法，转发节点接收所述故障通知消息后，进一步包括：4. The method according to claim 2, after the forwarding node receives the fault notification message, further comprising:将所述主用转发表项设置为无效，并将一个所述备用转发表项设置为有效。Setting the primary forwarding entry to be invalid, and setting one of the standby forwarding entries to be valid.5.根据权利要求2所述的方法，其特征在于，进一步包括：5. The method of claim 2, further comprising:转发节点接收到故障恢复消息时，判断所述故障节点的故障恢复；When the forwarding node receives the failure recovery message, it judges the failure recovery of the failure node;将所述主用转发表项设置为有效，并将所述备用转发表项设置为无效；Setting the active forwarding entry to be valid, and setting the standby forwarding entry to be invalid;将所述报文按照所述主用转发表项进行传输。and transmitting the message according to the active forwarding entry.6.根据权利要求1至5任意一项所述的方法，其特征在于，所述故障节点与所述保护节点为以太网中同一转发层上的节点；6. The method according to any one of claims 1 to 5, wherein the fault node and the protection node are nodes on the same forwarding layer in the Ethernet;所述故障节点与所述转发节点为以太网中不同转发层上的节点。The faulty node and the forwarding node are nodes on different forwarding layers in the Ethernet.7.一种报文传输系统，其特征在于，包括：转发节点、故障节点及其保护节点，7. A message transmission system, characterized in that, comprising: a forwarding node, a failure node and a protection node thereof,所述故障节点用于向其上一跳转发节点发送故障通知消息；The faulty node is used to send a fault notification message to its previous hop forwarding node;所述转发节点包括：The forwarding nodes include:接收单元，用于接收所述故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；a receiving unit, configured to receive a fault notification message sent by the faulty node, where the faulty node is a next-hop node of the forwarding node;传输单元，用于将报文按照预先配置的备用转发表项，传输至所述故障节点的保护节点；A transmission unit, configured to transmit the message to the protection node of the faulty node according to the pre-configured standby forwarding table entry;所述保护节点用于将所述报文传输至所述故障节点的下一跳转发节点。The protection node is configured to transmit the message to a next-hop forwarding node of the faulty node.8.根据权利要求7所述的系统，其特征在于，所述转发节点还包括：8. The system according to claim 7, wherein the forwarding node further comprises:配置单元，用于预先配置MAC转发表，所述MAC转发表中包含主用转发表项和至少一个备用转发表项。The configuration unit is used to pre-configure the MAC forwarding table, and the MAC forwarding table includes an active forwarding table item and at least one standby forwarding table item.9.根据权利要求8所述的系统，其特征在于，所述转发节点还包括：9. The system according to claim 8, wherein the forwarding node further comprises:设置单元，用于将所述主用转发表项设置为无效，并将一个所述备用转发表项设置为有效。A setting unit, configured to set the active forwarding entry as invalid, and set one of the standby forwarding entries as valid.10.根据权利要求8所述的系统，其特征在于，所述转发节点还包括：10. The system according to claim 8, wherein the forwarding node further comprises:判断单元，用于接收到故障恢复消息时，判断所述故障节点的故障恢复；A judging unit, configured to judge the fault recovery of the faulty node when receiving the fault recovery message;所述设置单元进一步用于，将所述主用转发表项设置为有效，并将所述备用转发表项设置为无效；The setting unit is further configured to set the active forwarding entry to be valid, and set the standby forwarding entry to be invalid;所述传输单元进一步用于，将所述报文按照所述主用转发表项进行传输。The transmission unit is further configured to transmit the message according to the primary forwarding entry.11.一种转发节点，其特征在于，包括：11. A forwarding node, characterized in that, comprising:接收单元，用于接收故障节点发送的故障通知消息，所述故障节点为所述转发节点的下一跳节点；a receiving unit, configured to receive a fault notification message sent by a faulty node, where the faulty node is a next-hop node of the forwarding node;传输单元，用于将报文按照预先配置的备用转发表项，传输至所述故障节点的保护节点。The transmission unit is configured to transmit the message to the protection node of the faulty node according to the pre-configured standby forwarding table entry.12.根据权利要求11所述的转发节点，其特征在于，还包括：12. The forwarding node according to claim 11, further comprising:配置单元，用于预先配置MAC转发表，所述MAC转发表中包含主用转发表项和至少一个备用转发表项。The configuration unit is used to pre-configure the MAC forwarding table, and the MAC forwarding table includes an active forwarding table item and at least one standby forwarding table item.13.根据权利要求12所述的转发节点，其特征在于，还包括：13. The forwarding node according to claim 12, further comprising:设置单元，用于将所述主用转发表项设置为无效，并将一个所述备用转发表项设置为有效。A setting unit, configured to set the active forwarding entry as invalid, and set one of the standby forwarding entries as valid.14.根据权利要求12所述的转发节点，其特征在于，还包括：14. The forwarding node according to claim 12, further comprising:判断单元，用于接收到故障恢复消息时，判断所述故障节点的故障恢复；A judging unit, configured to judge the fault recovery of the faulty node when receiving the fault recovery message;所述设置单元进一步用于，将所述主用转发表项设置为有效，并将所述备用转发表项设置为无效；The setting unit is further configured to set the active forwarding entry to be valid, and set the standby forwarding entry to be invalid;所述传输单元进一步用于，将所述报文按照所述主用转发表项进行传输。The transmission unit is further configured to transmit the message according to the primary forwarding entry.

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