WO2013010422A1

WO2013010422A1 - Share-path-based ring network tunnel configuration method, ring network protection method and system

Info

Publication number: WO2013010422A1
Application number: PCT/CN2012/077223
Authority: WO
Inventors: 陈杰; 刘国满; 曲延锋
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-07-15
Filing date: 2012-06-20
Publication date: 2013-01-24
Also published as: CN102882780A; CN102882780B

Abstract

A share-path-based ring network tunnel configuration method, a ring network protection method and system, using the off-ring node of an on-ring service as a destination node, and configuring a share-path-based working tunnel and a reversely closed protection tunnel corresponding to the working tunnel. In the technical solution, a plurality of MP2P share paths are established on one ring, and each share path can bear the services entering the ring from one or more nodes and getting off the ring from a same node, thus avoiding the complexity of ring network tunnel configuration, improving protection handoff performance and optimizing configuration.

Description

Ring network tunnel configuration method based on shared path, ring network protection method and system

Technical field

The present invention relates to the field of ring network protection technologies, and in particular, to a ring network tunnel configuration method based on a shared path, and a ring network protection method and system.

Background technique

Currently, in the ring network, for the G.8132 standard loopback protection scheme, since the protection scheme is a closed protection ring corresponding to each protected label switching path (LSP, Label Switching Path), the configuration workload is Too big, there are more switching actions, and the switching processing time is longer. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a ring network tunnel configuration method based on a shared path, a ring network protection method, and a system, to optimize the ring network configuration, and improve the performance of the protection switching.

In order to solve the above technical problem, the following technical solutions are used in the embodiment of the present invention:

A method for configuring a ring network tunnel based on a shared path, including:

A working tunnel based on the shared path and a reverse closed protection tunnel corresponding to the working tunnel are configured with the lower ring node of the ring service as the destination node.

Optionally, the physical ring network carrying the shared path carries multiple multi-point to point (MP2P) shared paths, and the shared path carries services from one or more nodes on the ring to the same destination node.

Optionally, the step of configuring the working tunnel based on the shared path with the lower ring node of the ring service as the destination node, and the reverse closed protection tunnel corresponding to the working tunnel include:

Establishing the working tunnel from a neighboring node of the lower ring node to the lower ring node in a clockwise and/or counterclockwise direction of the ring;

Establishing the said slave ring node to the lower ring node in the opposite direction of the working tunnel Closed protection tunnel.

A ring network protection method based on a shared path, the method comprising:

Configuring a working tunnel based on the shared path and a reverse closed protection tunnel corresponding to the working tunnel, with the lower ring node of the ring service as the destination node;

Each node on the ring detects a link state with the neighboring node, and when the link state change is detected, sends a state change notification message to other nodes on the ring;

When the link state changes to a link or a node fails, the faulty neighboring node switches the service sent to the fault point transmitted on the working tunnel to the corresponding closed protection tunnel, and the closed protection is performed. The traffic sent to the fault point transmitted on the tunnel is switched to the corresponding working tunnel; the node other than the neighboring node is transparently transmitted to the transmitted service.

Optionally, the method further includes:

When the link state changes to a link or a node failure disappears, the failed neighboring node reverts to the service transmitted on the closed protection tunnel and resumes to the working tunnel.

Optionally, the method further includes:

When the link state changes to a link or a node fails, the neighboring node changes the state of the node to a switch state, and the node other than the adjacent node changes the state of the node to punch-through ( Pass through

When the link state changes to a link or a node failure disappears, the neighboring node changes the state of the node from the Switch state to the idle state (Idle) state; the node other than the adjacent node of the fault changes the state of the node. Changed from the Pass through state to the Idle state.

Optionally, the method further includes:

When the service packet is forwarded on the upper ring, the push-to-press (PUSH) ring network tunnel label stack mode is adopted, including: pressing (PUSH) the tunnel label of the shared path according to the running direction of the lower ring node and the working tunnel, along the The ring network forwards the packet, and the lower ring node pops up (POP) the tunnel label to perform service ringing.

Optionally, the physical ring network carrying the shared path carries multiple multiple point-to-point (MP2P) Enjoying a path, the shared path carrying a service from one or more nodes on the ring to a same destination node;

The services carried by the shared path include: a virtual private network (VPN) service of a single-layer label, a label switched path (LSP) service of a multi-layer label, and an untagged IP or Ethernet (Eth) service.

Optionally, the working tunnel supports a penultimate hop pop (PHP).

A ring network tunnel configuration system based on a shared path, including a path configuration module, where: the path configuration module is configured to: configure a working tunnel based on a shared path with a lower ring node of the ring service as a destination node, and The working tunnel corresponds to the opposite closed protective tunnel.

Optionally, the path configuration module is configured to configure a working path based on the shared path and a reverse closed protection tunnel corresponding to the working tunnel by using the lower ring node of the ring service as the destination node in the following manner:

Establishing the working tunnel along a clockwise, and/or counterclockwise direction of the ring from an adjacent node of the lower ring node to the node;

The closed protection tunnel from the lower ring node to the lower ring node is established in the opposite direction of the working tunnel.

A ring network protection system based on a shared path, the system includes: a path configuration module, a state detection module, a status notification module, and a service switching module, where:

The path configuration module is configured to: configure a working tunnel based on the shared path and a reverse closed protection tunnel corresponding to the working tunnel by using the lower ring node of the ring service as the destination node; the state detecting module is configured to: Detecting the link state between the node and the neighboring node; the state notification module is configured to: when the state detecting module detects the link state change, send the state change notification message to other nodes on the ring;

The service switching module is configured to: when the node where the node is a faulty neighboring node, change the advertisement packet according to the received state, and learn that the link state changes from a normal state to a link or a node. When a fault occurs, the service sent to the fault point transmitted on the working tunnel is switched to the corresponding closed protection tunnel, and the service sent to the fault point transmitted on the closed protection tunnel is switched to the corresponding office. On the working tunnel; when the node where it is located is a node other than the faulty neighboring node, transparently transmits the transmitted service.

Optionally, the service switching module is further configured to:

When the node where the node is located is a faulty neighboring node, the notification message is changed according to the received state, and when the link state is changed to a link or the node failure disappears, the switch is switched to the closed protection tunnel. The business is restored to the working tunnel.

Optionally, the service switching module is further configured to:

When the node where the node is a faulty neighboring node, when the link state changes to a link or the node fails, the state of the node is changed to a switch state; when the link state changes to a link Or when the node fault disappears, change the state of the node from the Switch state to the idle state (Idle) state;

When the node where the node is a node other than the faulty neighboring node, when the link state changes to a link or the node fails, the state of the node is changed to a through state; when the link is When the state changes to a link or node failure, the state of the node is changed from the Pass through state to the Idle state.

A node, where the ring is configured with a shared path-based working tunnel configured with a lower ring node serving as a destination node, and a reverse closed protection tunnel corresponding to the working tunnel, where the node includes a status detection module, a status notification module, and a service switching module, wherein: the status detection module is configured to: detect a link status between the node and an adjacent node; and the status notification module is configured to: detect the status When the module detects that the link state changes, the sending status change notification message is sent to other nodes on the ring;

The service switching module is configured to: when the node is a faulty neighboring node, change the advertisement packet according to the received state, and when it is known that the link state changes from a normal state to a link or a node fails, Switching the service sent to the fault point transmitted on the working tunnel to the corresponding closed protection tunnel, and switching the service sent to the fault point on the closed protection tunnel to corresponding On the working tunnel; when the node is a node other than the faulty neighboring node, the transmitted service is transparently transmitted.

Optionally, the service switching module is further configured to:

When the node is a faulty neighboring node, the notification message is changed according to the received state, and when it is learned that the link state changes to a link or the node failure disappears, the switch is switched to the closed protection tunnel. The service is restored to the working tunnel.

Optionally, the service switching module is further configured to:

When the node is a faulty neighboring node, when the link state changes to a link or a node fails, the state of the node is changed to a switching state; when the link state changes to a link or When the node fault disappears, the state of the node is changed from the Switch state to the idle state (Idle) state; when the node is a node other than the faulty neighboring node, when the link state changes to a link or the node fails. , changing the state of the local node to a through state; when the link state changes to a link or a node failure disappears, changing the state of the local node from a Pass through state to an Idle state.

The embodiment of the invention provides a new WRAPPING ring network protection scheme, which can be applied to an MPLS/MPLS-TP ring network, by establishing multiple multi-point-to-point (MP2P) shared paths on one ring, on each shared path. It can carry services from one or more nodes on the ring to the ring of the same node. Compared with related technologies, it avoids the complexity of ring network tunnel configuration, improves the performance of protection switching, and optimizes configuration.

BRIEF abstract

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. In the drawing:

1 is a schematic diagram of a topology of a ring network according to the related art;

2 is a schematic diagram of component modules of a ring network protection system according to an embodiment of the present invention;

3 is a schematic diagram of fault state protection according to an embodiment of the present invention; 4 is a schematic diagram of a fault disappearing switch according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of a ring network protection process according to an embodiment of the present invention.

Preferred embodiment of the invention

This embodiment provides a ring network tunnel configuration method based on a shared path, and uses the following technical solutions:

Among them, the business on the ring is the business on the ring network.

The physical ring network carries multiple multi-point-to-point (MP2P) shared paths, and the shared path carries services from one or more nodes on the ring to the same destination node.

Establishing a working tunnel from a neighboring node of the lower ring node to the lower ring node in a clockwise, and/or counterclockwise direction of the ring;

A closed protection tunnel from the lower ring node to the lower ring node is established in the opposite direction of the working tunnel.

Based on the above-mentioned ring network tunnel configuration method, the present embodiment provides a ring network protection method based on a shared path, and uses the following technical solutions:

Step 1: For the lower ring node of the service on the ring, configure a working tunnel and a closed protection tunnel with each lower ring node as the destination node.

Where ^^, if the ring consists of n nodes, the working tunnel (equivalent to the path) from the neighboring node of the node to the local node in each of the lower ring nodes in the clockwise or counterclockwise direction of the ring, At the same time, a closed protection tunnel is established along the opposite direction of the working tunnel. At most, a 2N working tunnel and a 2N protection tunnel need to be established.

Step 2: Each link on the ring (that is, each node on the ring detects the link shape of the adjacent two nodes respectively) State, including whether the link or node is faulty, initiates fault detection. When a node on the ring detects the link state or the state of the peer node changes from the normal state to the fault state, the direction along the ring is far away from the fault. Send a status change notification message to other nodes. Step 3: After the other node on the ring receives the status change notification message, if it is a faulty neighboring node, the service sent to the fault point transmitted on the working tunnel includes: a virtual private network of a single layer label ( VPN, Virtual Private Network) service, multi-layer label LSP service, untagged IP or Ethernet (Eth) service, switch to the corresponding closed protection tunnel, and the service sent to the fault point transmitted on the closed protection tunnel Switch to the corresponding working tunnel; and other nodes on the ring perform transparent transmission of services.

Step 4: When a node on the ring detects the link state or the state of the peer node changes from the fault state to the normal state, the state change notification message is sent to the other node along the direction of the ring away from the original fault, and the fault occurs. When the neighboring node detects the state change notification message that the ring fault disappears or the fault state disappears, the neighbor node detects the traffic sent or received from the closed protection tunnel to the working tunnel for transmission or reception.

Step 5: After receiving the packet notification from the fault state to the normal state, all the nodes on the ring become Idle state; and for the faulty neighboring node, the service transmitted by the protection tunnel is re-established. Switch to the working tunnel to prevent loss of data.

Step 6: When the incoming service is transmitted on the working tunnel, when the service is transmitted to the penultimate hop on the working tunnel, the outer tunnel label may be popped up (PHP), and the transmitted service is directly sent to the service. Exit the node and continue to transmit.

In addition, in the foregoing step 3, the following processing steps are further included: when the ring node detects a fault or receives a state change notification message sent by the other node on the ring to the node, if it is a faulty neighbor node, then The Idle state is switched to the Switch state. For other nodes on the ring (non-fault neighbors), after receiving the state change notification message, the idle (Idle) state changes to the Pass through state.

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. Embodiment 1

This embodiment provides a ring network tunnel configuration system based on a shared path, where the system mainly includes a path configuration module, where:

The path configuration module is configured to: configure a working tunnel based on the shared path and a reverse closed protection tunnel corresponding to the working tunnel, with the lower ring node of the ring service as the destination node.

Optionally, the path configuration module is configured to configure a working path based on the shared path and a reverse closed protection tunnel corresponding to the working tunnel as the destination node of the ring service in the following manner:

Establishing a working tunnel from a neighboring node of the lower ring node to the node in a clockwise, and/or counterclockwise direction of the ring;

Embodiment 2

As shown in FIG. 2, the ring network protection system provided in this embodiment mainly includes the following four modules: a path configuration module 201, a status detection module 202, a status notification module 203, and a service switching module 204, where:

The path configuration module 201 is configured to: use each lower ring node of the ring service as a destination node, and configure a working tunnel from the adjacent node along the clockwise or counterclockwise direction of the ring to the lower ring node, and The working tunnel is provided with a protective tunnel of a closed loop in the opposite direction (hereinafter referred to as a closed protective tunnel) to protect the working tunnel.

The state detecting module 202 is configured to: detect the state of the link by detecting a fault detection packet of the link layer between two directly connected adjacent nodes on the ring.

For example, the link state is detected by detecting a continuity check and a continuity check (CC&CV, Continuity Check and Connectivity Verification) BFD (Bidirectional Forwarding Detection) message.

The status notification module 203 is configured to: when the status detection module 202 detects a change in the link status (including a link or node failure), generate a status change notification message, along the ring Sending to the ring node from the direction of the fault until it reaches the downstream node of the fault;

The status change notification message includes but is not limited to: ring network automatic protection switching (R-APS,

Ring-Automatic Protection Switching).

The service switching module 204 is configured to: perform protection switching of the service after the change of the link state is detected or the status change notification message (such as R-APS, etc.) sent by another node is received according to the following manner:

When the notification message is changed according to the received status, when it is learned that the link status changes to the normal status and the link becomes a fault, the neighboring node switches the service sent to the fault point transmitted on the working tunnel to the corresponding closed. On the protection tunnel, the service sent to the fault point transmitted on the closed protection tunnel is switched to the corresponding working tunnel; the node other than the adjacent node of the fault transmits the transmitted service transparently;

Changing the advertisement message according to the received status, when it is learned that the link status changes to the link or the node failure disappears, the faulty neighboring node reverts the service transmitted to the closed protection tunnel to the working tunnel. .

In addition, the service switching module 204 is further configured to: perform a change of the state on the local node, and change from the idle state to the Switch state or from the Swtich state to the Idle state for the faulty neighboring node; In other words, it changes from the idle state to the pass through state or from the pass through state to the idle state.

When the link status changes to a link or a node fails, the neighboring node changes the state of the node to the switch state, and the node other than the adjacent node changes the state of the node to the Pass through state.

When the link state changes to a link or a node failure disappears, the neighboring node changes the state of the node from the Switch state to the Idle state; the node other than the adjacent node changes the state of the node from the Pass through state to Idle state.

The embodiment of the present invention further provides a ring network protection system based on a shared path, where the system includes: a path configuration module, a state detection module, a state notification module, and a service switching module, where:

The path configuration module is configured to: configure the lower node of the ring service as the destination node based on a working tunnel of the shared path, and a reverse closed protection tunnel corresponding to the working tunnel; the state detecting module is configured to: detect a link state between the node where the node is located and the neighboring node; And sending, by the state detecting module, the status change notification message to other nodes on the ring;

The service switching module is configured to: when the node where the node is a faulty neighboring node, change the advertisement packet according to the received state, and when the link state is changed from the normal state to the link or the node fails, Switching the service sent to the fault point transmitted on the working tunnel to the corresponding closed protection tunnel, and switching the service sent to the fault point transmitted on the closed protection tunnel to the corresponding working tunnel When the node where the node is located is a node other than the adjacent node, the transmitted service is transparently transmitted.

Optionally, the service switching module is further configured to:

The embodiment of the present invention further provides a node, where the ring where the node is located is configured with a shared path-based working tunnel configured by using a lower ring node of the ring service as a destination node, and a reversed corresponding to the working tunnel. A closed protection tunnel, the node includes: a state detection module, a state notification module, and a service switching module, where: The status detecting module is configured to: detect a link status between the node and a neighboring node; the status notification module is configured to: send a status change notification when the status detecting module detects the link status change The message is sent to other nodes on the ring;

The service switching module is configured to: when the node is a faulty neighboring node, change the advertisement packet according to the received state, and when it is known that the link state changes from a normal state to a link or a node fails, Switching the service sent to the fault point transmitted on the working tunnel to the corresponding closed protection tunnel, and switching the service sent to the fault point transmitted on the closed protection tunnel to the corresponding working tunnel; When the node is a node other than the faulty neighboring node, the transmitted service is transparently transmitted.

Optionally, the service switching module is further configured to:

The specific implementation process of the ring network protection of the present invention will be further described in detail below by taking the faults of the network shown in FIG. 3 and FIG. 4 as an example.

It should be noted that the service carried by the shared path of the present invention may be a single-layer label VPN service (L2/L3 VPN) or a multi-layer label LSP service (IP-MPLS/MPLS-TP Tunnel, etc.), or even It is an unlabeled IP or Eth service.

For the ring network service, the main process of implementing ring network protection includes the following steps: Step 1: Configure a working tunnel and a closed protection tunnel;

In the network shown in Figure 3, point D, 4, such as its working tunnel is configured to be counterclockwise

(C-B-A-F-E-D), the corresponding protective tunnel is D-E-F-A-B-C-D closed loop. Alternatively, the working tunnel can be configured in a clockwise direction (E-F-A-B-C-D), and the corresponding protection tunnel is D-C-B-A-F-E-D.

Step 2: If the service 1 (the LSP service or the IP service or the PW service) and the service 2 (the LSP service, the IP service, or the PW service) enter the ring from the nodes A and B on the ring respectively, the ring is fault-free. Service 1 and service 2 are pushed (PUSH) to the CBAFED on the same working tunnel at points A and B respectively. The format of the encapsulated message is shown in Table 1.

Table 1 Packet encapsulation format

Tunnel Label (path)

LSP Label (IP Header, PW Label) PDU, where Tunnel Label: indicates the outer forwarding path label;

LSP Label: Indicates that the service is an LSP service. After the LSP label is swapped, the LSP label is swapped into the outer tunnel and then uploaded to the outer tunnel.

IP Header: indicates that when the incoming link is an IP service, the IP service is directly pushed into the outer tunnel Tunnel Label and transmitted in the outer tunnel.

PW Label: indicates that the access to the pseudowire emulation service (such as ATM, ETH, TDM, etc.) on the ingress ring node, after the local service processing (NSP) is performed on the ingress ring node, the corresponding PW is applied. Label, then press into the outer tunnel Tunnel Label and transmit it on the outer tunnel;

PDU: refers to the content of the specific packaged service.

The node on the ring only performs the swap operation of the outer tunnel label, and after the outer label 300 is popped up on the outgoing node D, the corresponding service 1 and service 2 services are directly processed; if the LSP service is In other words, first pop up (POP) the outer Tunnel label, then inside After the LSP Label Exchange (Swap) is exported, if the IP service is used, the outer label of the POP is popped up, and the information is sent out according to the information on the header of the IP Header. If it is a PW service, it will pop up first. POP) After the outer tunnel label is popped up, the PW Label is popped up, and the emulation service is encapsulated and processed according to the PW Label.

Step 3: When the link E or F on the ring detects a link or node failure (fault node E or F), all the transmitted services (such as service 1, service 2, etc.) on the working tunnel are switched to the protection tunnel. (DEFABCD) is transmitted; and a status change notification message (such as R-APS, etc.) is generated and sent to other nodes on the ring along the direction of the ring away from the fault.

Step 4: When other nodes on the ring receive the state change notification message, the non-fault neighboring node changes from the IDLE state to the pass through state; and the faulty peer node changes from the idle state to the idle state. Switching state.

Therefore, the service 1 and service 2 services enter the ring from nodes A and B, and are first pushed to the working tunnel CBAFED for transmission; when transmitted to the node F, they are switched to the protection tunnel, and the original working tunnel label 100 is exchanged (Swap After the protection tunnel label 101 is pushed into the protection tunnel FABCDE, and transmitted to the node E, the protection tunnel label 301 is exchanged into the working tunnel label 300, and is again pushed into the working tunnel to be transmitted until it reaches the ring-out node D, and pops up. After the layer operates the tunnel label 300, the service 1 and the service 2 are directly processed.

Step 5: When the fault on the ring disappears, as shown in Figure 4, the link fault between F and E disappears. When node F or E detects that the fault disappears, F or E changes from Switching state to Idle, and The DEFABCD on the protection tunnel is restored to the CBAFED transmission on the working tunnel. At the same time, the node E or F that detects the state change will also generate a status change notification message with the fault disappearing, and send it along the ring away from the fault. Give other nodes on the ring.

Step 6: When other nodes on the ring receive the status change notification message that the fault disappears, the original Switching and Pass Through states are changed to the Idle state; and the original protected tunnel is also transmitted on the E or F node. Re-switch the transfer on the working tunnel.

In step 7, for service 1 and service 2, the work tunnel CBAFED is re-pressed, and after it is transmitted to its exit node D, the outer working tunnel label 300 is popped up, and then according to the service 1 and service 2 services therein. Process it. FIG. 5 is a flowchart showing a processing procedure of a ring network protection method according to an embodiment of the present invention. As shown in FIG. 5, the process includes:

Step 101: Configure a working tunnel and a closed protection tunnel as a destination node of the ring service (also referred to as an egress node) of the ring service.

Step 102: A fault detection packet is periodically sent on each link.

Step 103: Determine whether a link state change is detected. If yes, go to step 104. Otherwise, go to step 105.

Step 104: Immediately generate a state change notification message and send it to other nodes on the ring.

Step 105: Periodically send a status advertisement message.

Step 106: The node on the ring detects or receives another status change notification message.

Step 107: Determine whether the link state change changes from the normal state to the fault state. If yes, go to step 108. Otherwise, go to step 109.

In step 108, each node is set to the Switching or Pass through state, and step 110 is performed. In step 109, each node is set to the Idle state.

Step 110: Perform a handover of a service delivery tunnel.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. Various changes and modifications may be made to the invention, and such changes and modifications are intended to be included within the scope of the appended claims.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any particular hardware and software. Combine.

Industrial applicability

The embodiment of the invention provides a new WRAPPING ring network protection scheme, which can be applied to an MPLS/MPLS-TP ring network, by establishing multiple multi-point-to-point (MP2P) shared paths on one ring, on each shared path. It can carry services from one or more nodes on the ring to the ring of the same node. Compared with related technologies, it avoids the complexity of ring network tunnel configuration, improves the performance of protection switching, and optimizes configuration. Therefore, the present invention has strong industrial applicability.

Claims

Claim

2. The ring network tunnel configuration method according to claim 1, wherein:

The physical ring network carrying the shared path carries a plurality of multi-point to point (MP2P) shared paths, the shared paths carrying services from one or more nodes on the ring to the same destination node.

The method for configuring a ring network tunnel according to claim 1 or 2, wherein the working node based on the shared path is configured as a destination node of the ring service, and the reverse closed protection corresponding to the working tunnel The steps of the tunnel include:

4. A ring network protection method based on a shared path, the method comprising:

5. The ring network protection method according to claim 4, further comprising:

6. The ring network protection method according to claim 4 or 5, further comprising: When the link state changes to a link or a node fails, the neighboring node changes the state of the node to a switch state, and the node other than the adjacent node changes the state of the node to punch-through ( Pass through

The ring network protection method according to claim 4 or 5, further comprising:

8. The ring network protection method according to claim 6, wherein:

The physical ring network carrying the shared path carries a plurality of multi-point-to-point (MP2P) shared paths, the shared path carrying services from one or more nodes on the ring to the same destination node; Services carried by the shared path include: virtual private network (VPN) services for single-layer labels, label switched path (LSP) services for multi-layer labels, and untagged IP or Ethernet (Eth) services.

9. The ring network protection method according to claim 8, wherein:

The working tunnel supports a penultimate hop pop (PHP).

A ring network tunnel configuration system based on a shared path, comprising a path configuration module, wherein: the path configuration module is configured to: configure a work tunnel based on a shared path with a lower ring node of the ring service as a destination node, and The working tunnel corresponds to a corresponding closed closed protection tunnel.

The ring network tunnel configuration system according to claim 10, wherein the path configuration module is configured to configure a working path based on the shared path with the lower ring node of the ring service as the destination node, and The corresponding reverse closed protection tunnel of the working tunnel:

Establishing the working tunnel from a neighboring node of the lower ring node to the node in a clockwise, and/or counterclockwise direction of the ring; The closed protection tunnel from the lower ring node to the lower ring node is established in the opposite direction of the working tunnel.

12. A ring network protection system based on a shared path, the system comprising: a path configuration module, a state detection module, a status notification module, and a service switching module, wherein:

The ring network protection system according to claim 12, wherein the service switching module is further configured to:

The ring network protection system according to claim 13, wherein the service switching module is further configured to:

When the node where the node is a node other than the faulty neighboring node, when the link state changes to a link or the node fails, the state of the node is changed to a through state; When the link status changes to a link or node failure, the state of the node is changed from the Pass through state to the Idle state.

A node, where the ring on which the node is located is configured with a shared path-based working tunnel configured with a lower ring node serving as a destination node, and a reverse closed protection tunnel corresponding to the working tunnel, The node includes: a status detection module, a status notification module, and a service switching module, where:

The status detecting module is configured to: detect a link status between the node and a neighboring node; the status notification module is configured to: send a status change notification when the status detecting module detects the link status change The message is sent to other nodes on the ring;

The node according to claim 15, wherein the service switching module is further configured to: when the node is a faulty neighboring node, change the notification message according to the received state, when the link is known When the state changes to a link or a node failure disappears, the traffic transferred to the closed protection tunnel is restored to the working tunnel.

The node according to claim 16, wherein the service switching module is further configured to: when the node is a faulty neighboring node, when the link state changes to a link or a node fails, The state of the node is changed to the switch state; when the link state changes to the link or the node fault disappears, the state of the node is changed from the switch state to the idle state (Idle state); When a node other than the node changes to a link or a node fails, the state of the node is changed to a through state; when the link state changes to a link or node failure When it disappears, the state of the node is changed from the Pass through state to the Idle state.