WO2014048128A1 - Point-to-multipoint service protecting method for ring network and upper ring node on ring network - Google Patents

Abstract

Embodiments of the present invention relate to the communications field and provide a point-to-multipoint service protecting method for a ring network and an upper ring node on the ring network, reducing time required for transmitting a service through a protection link when a fault occurs. The method comprises: the upper ring node of the point-to-multipoint service establishing a working link and a protection link that use the upper ring node as an initial node on the ring network; when a fault occurs on the ring network, the upper ring node judging whether the working link passes a fault point; if the working link passes the fault point, and a first lower ring node is located at a backward position of the upper ring node and a forward position of the fault point in a direction of the working link, the upper ring node transmitting the point-to-multipoint service at least to the first lower ring node through the working link; if the working link passes the fault point, and a second lower ring node is located at the backward position of the fault point and the forward position of the upper ring node in the direction of the working link, the upper ring node transmitting the point-to-multipoint service at least to the second lower ring node through the protection link.

Description

 The protection method of the point-to-multipoint service in the ring network and the upper ring node in the ring network. The application is submitted to the Chinese Patent Office on September 25, 2012, and the application number is 201210361216.1. The name of the invention is "point-to-multipoint in the ring network". The priority of the Chinese Patent Application for the protection of the service and the upper ring node in the ring network, the entire contents of which are incorporated herein by reference.

 Technical field

 The present invention relates to the field of communications, and in particular, to a point-to-multipoint service protection method in a ring network and an upper ring node in a ring network. Background technique

 Existing communication networks, including star networks, tree networks, and ring networks (hereinafter referred to as ring networks). In the prior art, the protection mode of the point-to-multipoint service in the ring network can be as shown in FIG. 1 . For example, Node B is the source node of a service in a point-to-multipoint service. The source node needs to send the point-to-multipoint service to nodes D, £ and ? . When the link fails, as shown in Figure 2, when a fault occurs between the nodes D and E, the point-to-multipoint service arrives at the D node from the node B, and then switches to the opposite direction, and then passes through the node C, B, A, and F arrive at node E, and node E re-sends to node F, and completes the transmission of point-to-multipoint service to nodes D, E, and F.

 In the above method, the working link of the point-to-multipoint service is B-C-D-E-F; when there is a fault between the nodes D and E, the protection link of the point-to-multipoint service is D-C-B-A-F-E-F. Obviously, as the number of nodes in the ring network increases, the protection link also grows. When a failure occurs, the time taken to switch to the protection link transmission service is too long, and two-way transmission may occur on a certain path. , wasting the bandwidth of the segment path. Summary of the invention

 Embodiments of the present invention provide a point-to-multipoint service protection method in a ring network and an upper ring node in a ring network, which can reduce the time required to transmit a service through a protection link in the event of a failure.

In order to achieve the above object, embodiments of the present invention use the following technical solutions: In a first aspect, an embodiment of the present invention provides a method for protecting a point-to-multipoint service in a ring network, where the method includes:

 The upper ring node of the point-to-multipoint service establishes a working link and a protection link with the upper ring node as a starting node on the ring network, where the point-to-multipoint service is in the lower part of the ring network. The point includes at least a first lower ring node and a second lower ring node, where the direction of the working link is opposite to the direction of the protection link; when a failure occurs in the ring network, the upper ring node determines the Whether the working link passes the fault point;

 If the working link passes the fault point, and in the direction of the working link, the first lower ring node is located downstream of the upper ring node and upstream of the fault point, and the upper ring node passes The working link transmits the point-to-multipoint service to at least the first lower ring node; if the working link passes through a fault point, and in a direction of the working link, the second The ring node is located downstream of the fault point and upstream of the upper ring node, and the upper ring node transmits the point-to-multipoint service to at least the second lower ring node through the protection link.

 In a first possible implementation manner, according to the first aspect, the method for the upper ring node of the point-to-multipoint service to establish a working link with the upper ring node as a starting node on the ring network includes:

 The upper ring node acquires configuration information of the working link, where the configuration information of the working link includes at least the upper ring node information, the lower ring node information, and the upper ring node to the lower ring node in the working link direction. The node information to be passed; the upper ring node determines the last lower ring node in the direction of the working link according to the configuration information of the working link;

 The upper ring node configures a forwarding label for other nodes on the working link except the last lower ring node.

In a second possible implementation manner, in combination with the first aspect or the first possible implementation manner, the upper ring node of the point-to-multipoint service establishes protection on the ring network with the upper ring node as a starting node. The method of the link includes: the upper ring node acquires configuration information of the protection link, and the configuration information of the protection link The information includes at least upper ring node information, lower ring node information, and node information to be passed from the upper ring node to the lower ring node in the direction of the protection link; the upper ring node determines, according to the configuration information of the protection link, Protecting the last lower ring node in the direction of the link;

 The upper ring node configures a forwarding label for other nodes on the protection link except the last lower ring node.

 In a second aspect, an embodiment of the present invention provides an upper ring node in a ring network, including: a link establishing module, configured to establish, on a ring network, a working link and a protection chain with the upper ring node as a starting node And the point-to-multipoint service includes at least a first lower ring node and a second lower ring node in a lower ring node of the ring network, where a direction of the working link is opposite to a direction of the protection link ;

 a judging module, configured to determine whether the working link passes a fault point when a fault occurs in the ring network, and a service transmission module, if the working link passes through a fault point, and is in a direction of the working link The first lower ring node is located downstream of the upper ring node and upstream of the fault point, and is configured to transmit the point-to-multipoint service to at least the first lower ring node by using the working link. And if the working link passes the fault point, and in the direction of the working link, the second lower ring node is located downstream of the fault point and upstream of the upper ring node, for The protection link transmits the point-to-multipoint service to at least the second lower ring node. In a first possible implementation manner, according to the second aspect, the link establishing module includes:

a first acquiring module, configured to acquire configuration information of the working link, where configuration information of the working link includes at least upper ring node information, lower ring node information, and an upper ring node in a direction of the working link The first determining module is configured to determine the last lower ring node in the working link direction according to the configuration information of the working link; the first configuration module is configured to The other nodes on the working link except the last lower ring node are configured with forwarding labels. In a second possible implementation manner, in combination with the second aspect or the first possible implementation manner, the link establishing module includes:

 a second acquiring module, configured to acquire configuration information of the protection link, where the configuration information of the protection link includes at least upper ring node information, lower ring node information, and an upper ring node in a direction of the protection link The node information to be passed to the lower ring node;

 a second determining module, configured to determine, according to configuration information of the protection link, a last lower ring node in a direction of the protection link; a second configuration module, configured to use the last link on the protection link A node other than the lower ring node configures the forwarding label.

 The protection method of the point-to-multipoint service in the ring network provided by the embodiment of the present invention and the upper ring node in the ring network determine whether the working link passes the fault point, and then the upper ring node can bypass the fault point and select the working chain. Road and/or protection links transmit point-to-multipoint services. Compared with the prior art, the time required for switching to the protection link transmission service when the working link fails, and the bidirectional transmission on the same path are avoided, thereby saving bandwidth resources.

 BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work. 1 is a schematic structural diagram of a working link of a ring network in the prior art;

 2 is a schematic diagram of a prior art switching service path;

 3 is a flow chart 1 of a method for protecting a point-to-multipoint service in a ring network according to an embodiment of the present invention;

 4 is a schematic structural diagram 1 of a ring network according to an embodiment of the present invention;

 FIG. 5 is a schematic diagram of a ring network structure according to an embodiment of the present invention; FIG. 6 is a schematic flowchart of a method for establishing a working link by an upper ring node according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of a method for establishing a protection link by an upper ring node according to an embodiment of the present invention; FIG. 8 is a schematic structural diagram 1 of an upper ring node in a ring network according to an embodiment of the present invention; FIG. 9 is a schematic structural diagram 2 of an upper ring node in a ring network according to an embodiment of the present invention; FIG. FIG. 11 is a schematic structural diagram of an upper ring node in a ring network according to an 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. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention. The embodiment of the invention provides a protection method for a point-to-multipoint service in a ring network, as shown in FIG. 3, which includes:

 S101. The upper ring node of the point-to-multipoint service establishes the working link and the protection link of the ring node as the starting node respectively on the ring network, where the point-to-multipoint service includes at least the first ring node of the ring network. The lower ring node and the second lower ring node have opposite directions of the working link and the direction of the protection link.

 The upper ring node can obtain configuration information from the network management or exchange according to multi-protocol labels.

The English-language protocol (Multi-Protocol Label Switching, hereinafter referred to as MPLS) specifies that the working link and protection link with the starting node are established on the ring network.

 Taking the ring network shown in FIG. 4 as an example, the ring network includes nodes A, B, C, D, E, and F, and the node B is the point-to-multipoint service in the ring node of the ring network, and nodes D and E. F is the point-to-multipoint service at the lower ring node of the ring network.

 The working link established by Node B on the ring network with Node B as the starting node is shown by the solid line with arrows in Figure 4 (BCDEF) and the established protection link with Node B as the starting node is shown in Figure 4. The dotted line with the arrow is shown (BAFED). Exemplarily, the direction of the working link in Figure 4 is clockwise, and the direction of the protection link is counterclockwise.

S102. When a fault occurs in the ring network, the upper ring node determines whether the working link passes the fault point.

Optionally, each node in the ring network can utilize operation management and maintenance ( Operation The Administration and Maintenance (OAM) mechanism detects whether an adjacent link or node is faulty. When it is determined that an adjacent link or node is faulty, the node adjacent to the fault point can broadcast the fault information in the ring network.

 Taking the scene shown in Figure 5 as an example, in this scenario, the fault point is located between node D and node E. Both node D and node E use the OAM mechanism to detect that a neighboring link has failed. Therefore, node D and node E broadcast the fault information in the ring network. The fault information broadcast by the node D indicates that a fault occurs downstream of the node D in the clockwise direction, and the fault information broadcast by the node E indicates that the fault occurs upstream of the node E in the clockwise direction. Therefore, other nodes on the ring network can know that the node is in the node. The link between D and node E has failed. Similarly, when a node fails, the two nodes adjacent to the faulty node also broadcast fault information in the ring network.

 Therefore, when a fault occurs in the ring network, the upper ring node can determine the specific location of the fault point according to the obtained fault information, and further determine whether the working link passes the fault point.

S103. If the working link passes the fault point and is in the direction of the working link, the first lower ring node is located downstream of the upper ring node and upstream of the fault point, and the upper ring node uses the working link to connect the point-to-multipoint service. At least to the first lower ring node; if the working link passes the fault point, and in the direction of the working link, the second lower ring node is located downstream of the fault point and upstream of the upper ring node, and the upper ring node passes the protection link The point-to-multipoint service is transmitted to at least the second lower ring node. Still taking the scenario shown in Figure 5 as an example, since the fault point is located between node D and node F, and the working link of the point-to-multipoint service in the ring network is BCDEF, the working link passes through the fault point. The lower-loop nodes of the point-to-multipoint service in the ring network are nodes D, E, and F, wherein, in the clockwise direction, the lower ring node D is located downstream of the upper ring node B and upstream of the fault point, and therefore, The ring node B transmits the point-to-multipoint service to the lower ring node D through the working link; the lower ring nodes E and F are located downstream of the fault point and upstream of the upper ring node B, therefore, the upper ring node B passes the protection link The point-to-multipoint service is transmitted to the lower ring nodes E and F.

Optionally, if the number of the first lower ring nodes is 0, all the lower ring nodes are located downstream of the fault point and upstream of the upper ring node in the direction of the working link, therefore, The upper ring node can transmit the point-to-multipoint service to all lower ring nodes through the protection link. Similarly, if the number of the second lower ring nodes is 0, it means In the direction of the working link, all the lower ring nodes are located downstream of the upper ring node and upstream of the fault point. Therefore, the upper ring node can transmit the point-to-multipoint service to all under the working link. Ring node.

 Optionally, as shown in FIG. 6, in the foregoing S101, the working link that the upper ring node uses the upper ring node as a starting node on the ring network may include:

5201. The upper ring node obtains configuration information of the working link, where the configuration information of the working link includes at least the information of the upper ring node, the information of the lower ring node, and the path from the upper ring node to the lower ring node in the working link direction. Node information. Optionally, the upper ring node obtains the configuration information of the working link from the network management, or obtains the configuration information of the working link according to the MPLS protocol.

 The network management device in this embodiment may be a network device consisting of a network management software platform supporting the network management protocol, a network management supporting software, a network management working platform, and a supporting network management protocol, and capable of providing network system configuration, fault, performance, and network user distribution. Basic management.

 5202. The upper ring node determines the last lower ring node in the working link direction according to the configuration information of the working link.

 5203. The upper ring node configures a forwarding label for other nodes except the last lower ring node on the working link.

 Still taking FIG. 4 as an example for explanation. The upper ring node B obtains the configuration information of the working link, and the configuration information includes at least the address of the upper ring node B, the addresses of the lower ring nodes D, E, and F, and the working link direction from the upper ring node B to the lower ring node D. , E, F, the address of the node C to pass; the upper ring node B determines, according to the configuration information, that the lower ring node F is the last lower ring node in the working link direction; the upper ring node B is the last one on the working link. The node outside the ring node F is configured to forward the forwarding label of the point-to-multipoint service, that is, the upper ring node B configures a forwarding label for the node C, the lower ring node D, and the lower ring node E, and the node C and the lower ring node D. After receiving the point-to-multipoint service, the lower ring node E forwards the point-to-multipoint service according to the forwarding label configured by itself.

For example, when the point-to-multipoint service is looped from node B, a layer of ring label is added. To node c;

 Node c replaces the ring label with its own configured forwarding label, and then sends the point-to-multipoint service to the lower ring node D;

 The lower ring node D copies the point-to-multipoint service into two parts, and the lower ring node D performs one of the following processes: stripping the forwarding label, and then the point-to-multipoint service leaves the ring network from the lower ring node D; The lower ring node D performs the following processing on the other part: replacing the forwarding label of the node C with the forwarding label configured by itself, and then sending the point-to-multipoint service to the lower ring node E;

 The processing of the point-to-multipoint service of the lower ring node E is the same as that of the lower ring node D, one is stripped after the label is removed, and the other is replaced by the forwarding label and sent to the lower ring node F;

 After receiving the point-to-multipoint service, the lower ring node F strips the forwarding label, and then the point-to-multipoint service leaves the ring network from the lower ring node F. Similarly, as shown in FIG. 7, in the foregoing S101, the upper ring node establishes a protection link on the ring network, where the upper ring node is a starting node, and may include:

 S301. The upper ring node obtains configuration information of the protection link, where the configuration information of the protection link includes at least information of the upper ring node, the information of the lower ring node, and a node that passes through the upper ring node to the lower ring node in the direction of the protection link. information. Optionally, the upper ring node obtains the configuration information of the protection link from the network management, or obtains the configuration information of the protection link according to the MPLS protocol.

 S302. The upper ring node determines the last lower ring node in the protection link direction according to the configuration information of the protection link.

S303. The upper ring node configures a forwarding label for the other nodes except the last lower ring node on the protection link.

Still taking FIG. 4 as an example for description. The upper ring node B obtains configuration information of the protection link, and the configuration information includes at least the address of the upper ring node B, the addresses of the lower ring nodes F, E, and D, and the protection link direction from the upper ring node B to the lower ring node F. The address of the node A to be passed by E, D, and the upper ring node B determines that the lower ring node D is the last lower ring node in the direction of the protection link according to the configuration information; The upper ring node B configures a forwarding label for forwarding the point-to-multipoint service for each node except the last lower ring node D on the protection link, that is, the upper ring node B is node A, lower ring node F, and lower The ring node E configures the forwarding label, node A, and lower ring node? After receiving the point-to-multipoint service, the lower ring node E forwards the point-to-multipoint service according to the forwarding label configured by itself.

 For example, when the point-to-multipoint service is looped from the node B, a ring label is added and sent to the node A; the node A replaces the ring label with the forwarding label configured by itself, and then sends the point-to-multipoint service to the next. Ring node F;

 The lower ring node F copies the point-to-multipoint service into two parts, and the lower ring node F processes one of the following: strips the forwarding label, and then the point-to-multipoint service leaves the ring network from the lower ring node F; The lower ring node F performs the following processing on the other part: replacing the forwarding label of the node A with the forwarding label configured by itself, and then sending the point-to-multipoint service to the lower ring node E;

 The processing of the point-to-multipoint service of the lower ring node E is the same as that of the lower ring node F, one stripping the label and then the lower ring, and the other replacing the forwarding label and sending it to the lower ring node D;

After receiving the point-to-multipoint service, the lower ring node D strips the forwarding label, and then the point-to-multipoint service leaves the ring network from the lower ring node D. It should be noted that there is no chronological limitation between establishing a working link and establishing a protection link. The method provided by the embodiment of the present invention determines whether the working link passes the fault point, and further, the upper ring node can bypass the fault point and select the working link and/or the protection link to transmit the point-to-multipoint service. Compared with the prior art, the time required to switch to the protection link transmission service when the working link fails, the time of the bidirectional transmission on the same path is avoided, and the bandwidth resource is saved. An embodiment of the present invention provides an upper ring node in a ring network. As shown in FIG. 8, the method includes: a link establishing module 10, configured to establish, on a ring network, a working link that uses the upper ring node as a starting node. And a protection link, where the point-to-multipoint service includes at least a first lower ring node and a second lower ring node in a lower ring node of the ring network, a direction of the working link and the protection link The opposite direction; The determining module 11 is configured to determine whether the working link passes the fault point when a fault occurs in the ring network.

 The service transmission module 12, if the working link passes the fault point, and in the direction of the working link, the first lower ring node is located downstream of the upper ring node and upstream of the fault point, Transmitting the point-to-multipoint service to at least the first lower ring node through the working link; if the working link passes a fault point, and in a direction of the working link, the The second lower ring node is located downstream of the fault point and upstream of the upper ring node, and is configured to transmit the point-to-multipoint service to at least the second lower ring node by using the protection link. Optionally, as shown in FIG. 9, the link establishing module 10 includes: a first acquiring module 100, configured to acquire configuration information of the working link, where configuration information of the working link includes at least an upper ring node Information, lower ring node information, and node information to pass through from the upper ring node to the lower ring node in the working link direction; the first determining module 101 is configured to determine, according to the configuration information of the working link The last lower ring node in the direction of the working link; the first configuration module 102 is configured to configure a forwarding label for other nodes on the working link except the last lower ring node.

Optionally, as shown in FIG. 10, the link establishing module 10 includes: a second obtaining module 103, configured to acquire configuration information of the protection link, where configuration information of the protection link includes at least an upper ring node The information, the lower ring node information, and the node information to be passed from the upper ring node to the lower ring node in the direction of the protection link; the second determining module 104 is configured to determine, according to the configuration information of the protection link, The last lower ring node in the direction of the protection link; the second configuration module 105 is configured to configure a forwarding label for other nodes on the protection link except the last lower ring node. The upper ring node in the ring network provided by the embodiment of the present invention determines whether the working link passes the fault point, and further, the upper ring node can bypass the fault point, select the working link and/or the protection link transmission point to multiple points. business. Compared with the prior art, the time required for switching to the protection link transmission service when the working link fails, and the bidirectional transmission on the same path are avoided, thereby saving bandwidth resources. An embodiment of the present invention provides an upper ring node in a ring network, as shown in FIG. 11, including: a memory 1 for storing an instruction; a processor 2, configured to execute the instruction, where the instruction is used on a ring network After the working link and the protection link with the upper ring node as the starting node are respectively established, the point-to-multipoint service in the ring network of the ring network includes at least a first lower ring node and a second a lower ring node, the direction of the working link is opposite to the direction of the protection link, and when a fault occurs in the ring network, determining whether the working link passes the fault point, and if the working link passes a point of failure, and in a direction of the working link, the first lower ring node is located downstream of the upper ring node and upstream of the fault point, and the point to multipoint is performed by the working link The service is transmitted to the first lower ring node at least, or, if the working link passes the fault point, and in the direction of the working link, the second lower ring node is located downstream of the fault point and The upstream of the upper ring node passes Transmitting the said protection link multipoint service to the at least part of the second lower point. The node provided by the embodiment of the present invention can determine whether the working link passes the fault point, and further, the node can bypass the fault point and select the working link and/or the protection link to transmit the point-to-multipoint service. Compared with the prior art, the time required to switch to the protection link transmission service when the working link fails, the time of the bidirectional transmission on the same path is avoided, and the bandwidth resource is saved.

 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk. The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request  A protection method for a point-to-multipoint service in a ring network, which is characterized in that: the upper ring node of the point-to-multipoint service establishes a working link with the upper ring node as a starting node on the ring network respectively. And a protection link, where the point-to-multipoint service includes at least a first lower ring node and a second lower ring node in a lower ring node of the ring network, a direction of the working link and the protection link The opposite direction;  When a fault occurs in the ring network, the upper ring node determines whether the working link passes a fault point;  If the working link passes the fault point, and in the direction of the working link, the first lower ring node is located downstream of the upper ring node and upstream of the fault point, and the upper ring node passes Transmitting, by the working link, the point-to-multipoint service to the first lower ring node;  If the working link passes the fault point, and in the direction of the working link, the second lower ring node is located downstream of the fault point and upstream of the upper ring node, and the upper ring node passes The protection link transmits the point-to-multipoint service to at least the second lower ring node.  The method for protecting a point-to-multipoint service in a ring network according to claim 1, wherein the upper ring node of the point-to-multipoint service is established on the ring network, and the upper ring node is used as a starting node. The methods of working links include:  The upper ring node acquires configuration information of the working link, where the configuration information of the working link includes at least the upper ring node information, the lower ring node information, and the upper ring node to the lower ring node in the working link direction. The node information to be passed;  The upper ring node determines the last lower ring node in the working link direction according to the configuration information of the working link;  The upper ring node configures a forwarding label for other nodes on the working link except the last lower ring node.  The method for protecting a point-to-multipoint service in a ring network according to claim 1 or 2, wherein the upper ring node of the point-to-multipoint service is established on the ring network with the upper ring node as a starting point The method of protecting the link of the origin node includes: The upper ring node acquires configuration information of the protection link, where the configuration information of the protection link includes at least upper ring node information, lower ring node information, and an upper ring node to a lower ring node in the protection link direction. The node information to be passed; Determining, by the upper ring node, a last lower ring node in a protection link direction according to configuration information of the protection link;  The upper ring node configures a forwarding label for other nodes on the protection link except the last lower ring node.  4. An upper ring node in a ring network, characterized in that:  a link establishing module, configured to establish, on the ring network, a working link and a protection link, where the upper ring node is a starting node, where the point-to-multipoint service is at least a lower ring node of the ring network a first lower ring node and a second lower ring node, where a direction of the working link is opposite to a direction of the protection link;  a judging module, configured to determine whether the working link passes a fault point when a fault occurs in the ring network, and a service transmission module, if the working link passes through a fault point, and is in a direction of the working link The first lower ring node is located downstream of the upper ring node and upstream of the fault point, and is configured to transmit the point-to-multipoint service to at least the first lower ring node by using the working link. And if the working link passes the fault point, and in the direction of the working link, the second lower ring node is located downstream of the fault point and upstream of the upper ring node, for The protection link transmits the point-to-multipoint service to at least the second lower ring node.  The upper ring node in the ring network according to claim 4, wherein the link establishing module comprises:  a first acquiring module, configured to acquire configuration information of the working link, where configuration information of the working link includes at least upper ring node information, lower ring node information, and an upper ring node in a direction of the working link The node information to be passed to the lower ring node;  a first determining module, configured to determine, according to configuration information of the working link, a last lower ring node in a direction of the working link;  And a first configuration module, configured to configure a forwarding label for other nodes on the working link except the last lower link point.  The upper ring node in the ring network according to claim 4 or 5, wherein the link establishing module comprises: a second acquiring module, configured to acquire configuration information of the protection link, where the configuration information of the protection link includes at least upper ring node information, lower ring node information, and an upper ring node in a direction of the protection link The node information to be passed to the lower ring node; a second determining module, configured to determine, according to configuration information of the protection link, a last lower ring node in a direction of the protection link; a second configuration module, configured to use the last A node other than the lower ring node configures the forwarding label.