WO2016161802A1

WO2016161802A1 - Method and system for realizing quick changeover of dni-pw

Info

Publication number: WO2016161802A1
Application number: PCT/CN2015/093679
Authority: WO
Inventors: 周万涛; 汪茫; 戎听红
Original assignee: 烽火通信科技股份有限公司
Priority date: 2015-04-08
Filing date: 2015-11-03
Publication date: 2016-10-13
Also published as: CN104753722B; CN104753722A

Abstract

The present invention relates to the field of communications. Disclosed are a method and system for realizing a quick changeover of DNI-PW. The method comprises: adding an intf_tbl table in a primary VPWS, and adding a l2ve_bridge_tbl table in a secondary VPWS; if no failure occurs, then an uplink service is bridged on a primary aggregation node to an L3VPN via an L2VE1 and an L3VE1, and a downlink service is bridged on the primary aggregation node to a primary VPWS via the L3VE1 and the L2VE1; if a power failure occurs, then the uplink service is bridged on a secondary aggregation node to the L3VPN via the L2VE1 and the L3VE1, and the downlink service is bridged on the secondary aggregation node to a secondary VPWS via the L2VE1 and the L3VE1; if a failure of disk removal or line disconnection occurs, then the uplink service is bridged on the secondary aggregation node to a DNI-PW via the L2VE1 and an L2VE0, and the downlink service is bridged on the primary aggregation node to the DNI-PW via the L3VE1 and the L2VE0, and is bridged on the secondary aggregation node to the secondary VPWS via the L2VE0 and the L2VE1. The present invention reduces the workload of software refreshing during a changeover operation, and increases the uplink-and-downlink changeover speed of a service.

Description

Method and system for implementing DNI-PW with fast switching

Technical field

The present invention relates to the field of communication technologies, and in particular, to a DNI-PW (Dual Node Interconnection Pseudo Wire) implementation method and system.

Background technique

With the rise of the Internet and the diversification of applications, the Internet has profoundly changed people's learning, work and lifestyle. In order to support the development of the Internet, the scale of the network of telecom operators is getting larger and larger, the structure is becoming more and more complex, and higher requirements are placed on the stability of the network.

The carrier network is generally divided into two layers: the backbone network and the metropolitan area network. The backbone network can be divided into three layers: the core layer, the aggregation layer, and the access layer. The DNI-PW is set up between the two aggregation devices to protect some or all of the N VPWSs with one VPWS (Virtual Pseudo Wire Service) (DNI-PW).

When the fault occurs on the service provider network, the main ring is disconnected, the main aggregation node is powered off, and the main aggregation node is powered off. The fault must be detected and the traffic can be quickly switched. Repair, however, the traditional method has several drawbacks:

1. The downlink switchover needs to refresh the N host states in each VC (Virtual Circuit), resulting in a long switching time.

2. The control plane needs to sense the service switching state and increase the software complexity.

3. When the active node is powered off, the uplink switching needs to refresh the service bridging status one by one. The switching time is long.

Therefore, there is a need for a method for implementing DNI-PW fast switching.

Summary of the invention

In view of the deficiencies in the prior art, the present invention aims to provide a fast switching DNI-PW implementation method and system, and the invention reduces the workload; at the forwarding layer, the control plane shields the signaling interaction before and after the switching. Difference, the protocol of the control plane does not need to sense the process of switching; the uplink switching speed is improved.

To achieve the above objective, the technical solution adopted by the present invention is: a fast switching DNI-PW implementation method, which is applied to a virtual private line service VPWS network, where the VPWS network includes a primary VPWS, an alternate VPWS, a primary aggregation node, The standby aggregation node and the Layer 3 virtual private network L3VPN, and the dual node interconnection pseudowire DNI-PW is provided between the primary aggregation node and the standby aggregation node, including the following steps: Step S1. Add an intf_tbl table to the primary VPWS, The l2ve_bridge_tbl table is added to the standby VPWS. The intf_tbl table is used to determine whether the service enters the primary VPWS, the standby VPWS, or the L3VPN. The l2ve_bridge_tbl table is used to implement the Layer 2 virtual instance interface L2VE_Port and the 3 layer virtual instance on the exit of the Layer 2 virtual private network L2VPN. The association of the interface L3VE_Port, the L2VE_Port includes L2VE0 and L2VE1, the L3VE_Port includes L3VE1; Step S2. Determine whether a fault occurs, and if yes, go to step S3; if not, go to step S5; Step S3. Determine the fault type If the main path is broken, the process goes to step S4; if the main aggregation node is dialed, the process goes to step S7; if the main use is aggregated If the power is off, go to step S6; step S4. Determine whether the service has been broken, if yes, go to step S7; if not, go to step S5; step S5. The uplink service is in the primary aggregation node L2VPN is connected to L3VPN through L2VE1 and L3VE1; the downlink service is connected to the active VPWS through L3VE1 and L2VE1 at the primary aggregation node; the process ends; Step S6. The uplink service is bridged to the standby aggregation node through L2VE1 and L3VE1. L3VPN; the downlink service is connected to the standby VPWS through the L2VE1 and L3VE1 at the standby aggregation node; the process ends; Step S7. The uplink service is connected to the DNI-PW through the L2VE1 and L2VE0 bridges at the standby aggregation node, and is bridged by the L2VE0 and L3VE1 at the primary aggregation node. L3VPN; the downlink service is connected to the DNI-PW through the L3VE1 and L2VE0 bridges at the primary aggregation node, and the standby aggregation node is connected to the standby aggregation node through the L2VE0 and L2VE1 at the standby aggregation node;

On the basis of the above technical solution, in the step S1, the intf_tbl table includes dni_pw_ena, which is used as a DNI-PW enable flag; wherein the value "1" indicates that the DNI-PW is enabled; and the dni_pw_status indicates whether the occurrence occurs. DNI-PW switching; where the value "1" indicates that the DNI-PW switching has occurred; dni_pw_l2ve_port_id is used to indicate the L2VE_Port corresponding to the DNI-PW.

On the basis of the foregoing technical solution, the specific process of determining whether the service has been broken in step S4 is: Step S41. In the uplink service, the primary VPWS searches for the intf_tbl table; and in step S42, determines whether the value of dni_pw_ena is "1", If yes, go to step S43; if no, go to step S5; step S43. Determine whether the value of dni_pw_status is "1", if yes, go to step S7; if no, go to step S5 .

On the basis of the above technical solution, in step S1, the l2ve_bridge_tbl table includes flag_to_l2ve for indicating whether the L2VE_Port has been associated; wherein the value "1" indicates that the L2VE_Port has been associated; ve_port_id is used to indicate the corresponding L2VE_Port or L3VE_Port. .

Based on the foregoing technical solution, the specific process for determining the fault type in step S3 is: step S31. In the downlink service, the standby VPWS searches for the l2ve_bridge_tbl table; step S32. determines whether the value of flag_to_l2ve is "1", and if so, jumps Go to step S33; if no, go to step S34; step S33. Search for the corresponding L2VE_Port according to ve_port_id, go to step S7; step S34. Find the corresponding ve_port_id L3VE_Port, go to step S6.

Based on the foregoing technical solution, in step S1, the L2VPN includes VPWS and DNI-PW.

On the basis of the foregoing technical solutions, the following steps are first performed in the step S6 and the step S7: the uplink service completes the pseudowire PW1:1 switching on the access device.

Based on the above technical solution, the primary VPWS and the standby VPWS each include a plurality of pseudowires.

The invention also provides a fast switching DNI-PW implementation system, which is applied to a virtual private line service VPWS network, the VPWS network includes a primary VPWS, an alternate VPWS, a primary aggregation node, an alternate aggregation node, and a 3-layer virtual private network. L3VPN, and a dual-node interconnected pseudowire DNI-PW is provided between the primary aggregation node and the standby aggregation node. The system includes an intf_tbl table addition module for adding an intf_tbl table to the primary VPWS, and the intf_tbl table is used to determine The service enters the primary VPWS, the standby VPWS or the L3VPN; the l2ve_bridge_tbl table adds a module for adding the l2ve_bridge_tbl table to the standby VPWS, and the l2ve_bridge_tbl table is used to implement the Layer 2 virtual instance interface L2VE_Port and the 3 layer virtual in the exit of the Layer 2 virtual private network L2VPN. The association of the instance interface L3VE_Port, the L2VE_Port includes L2VE0 and L2VE1, and the L3VE_Port includes L3VE1; the fault type judging module is configured to determine whether a fault occurs, and if no fault occurs, the first service bridging indication signal is generated and sent to the first service. Bridge indicator module; if a fault occurs, determine the fault type, if the main aggregation node is powered off The second service bridging indication signal is generated and sent to the second service bridging indication module; if the main aggregation node is dialed, the third service bridging indication signal is generated and sent to the third service bridging indication module; If the path is broken, it is determined whether the service is broken. If yes, a third service bridging indication signal is generated and sent to the third service bridging indication module; if not, the first service bridging indication signal is generated and sent to the a service bridging indication module; A service bridging indication module is configured to: when receiving the first service bridging indication signal, indicate that the uplink service is connected to the L3VPN through the L2VE1 and the L3VE1 in the primary aggregation node; the downlink service is connected to the active VPWS through the L3VE1 and the L2VE1 in the primary aggregation node. The second service bridging indication module is configured to: when receiving the second service bridging indication signal, indicate that the uplink service is bridged to the L3VPN by the L2VE1 and the L3VE1 at the standby aggregation node; the downlink service is connected to the standby VPWS by the L2VE1 and the L3VE1 bridge at the standby aggregation node; The third service bridging indication module is configured to: when receiving the third service bridging indication signal, indicate that the uplink service is connected to the DNI-PW through the L2VE1 and L2VE0 bridges at the standby aggregation node, and the L3VPN is connected to the L3VPN through the L2VE0 and L3VE1 at the primary aggregation node; The service is connected to the DNI-PW through the L3VE1 and L2VE0 at the primary aggregation node, and is connected to the standby aggregation node through the L2VE0 and L2VE1 at the standby aggregation node.

On the basis of the foregoing technical solution, when the second service bridging indication module receives the second service bridging indication signal, it first indicates that the uplink service completes the PW1:1 switching on the access device; the third service bridging indication module receives When the third service bridges the indication signal, it first instructs the uplink service to complete the pseudowire PW1:1 switching on the access device.

The beneficial effects of the invention are:

1. The present invention is based on VC switching of VPWS, and does not need to consider how many hosts are included in the VC service, that is, the workload is reduced by N times compared with the conventional method (N is the number of hosts in the VPWS service).

2. In the present invention, the switching operation is triggered by the BFD (Bidirectional Forwarding Detection)/OAM (Operation Administration and Maintenance) deployed on the forwarding plane, and no master participation is required. Therefore, although the path of the signaling interaction needs to be switched after the service switching, the master does not sense the process of the switching. Therefore, the present invention shields the control plane from the difference of the signaling interaction before and after the switching at the forwarding plane, and the control plane Agreement does not need to feel Know the process of switching.

The l2ve_bridge_tbl table is provided in the present invention. The L2Ve_port (L2Virtual Entity, Layer 2 virtual instance interface) of the standby VPWS is the same. Therefore, when the primary aggregation node loses power, the uplink service switching of the standby aggregation node only needs to be performed. By refreshing the bridge state of the l2ve_bridge_tbl table, multiple VPWSs can be associated with the DNI-PW, thereby improving the uplink switching speed.

DRAWINGS

Figure 1 is a schematic diagram of the DNI-PW internal implementation model;

FIG. 2 is a flowchart of a method for implementing fast switching DNI-PW according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 1 and FIG. 2, an embodiment of the present invention provides a fast switching DNI-PW implementation method, which is applied to a VPWS network, where the VPWS network includes a primary VPWS, an alternate VPWS, a primary aggregation node, and an alternate aggregation node. And the L3VPN (L3Virtual Private Network), the primary VPWS and the standby VPWS each include a plurality of PWs (Pseudo Wires), and the DNI is provided between the primary aggregation node and the standby aggregation node. PW, including the following steps:

Step S1. Add the intf_tbl table in the primary VPWS, and add the l2ve_bridge_tbl table in the standby VPWS; wherein the intf_tbl table is used to determine that the service enters the primary VPWS, the alternate VPWS or the L3VPN, and the l2ve_bridge_tbl table is used in the L2VPN (L2Virtual Private Network, 2) The L2VE_Port includes the VPWS and the DNI-PW, the L2VE_Port includes the L2VE0 and the L2VE1, and the L3VE_Port includes the L3VE1. The L2VE_Port includes the VPWS and the DNI-PW.

Preferably, the intf_tbl table includes dni_pw_ena, dni_pw_status, and dni_pw_l2ve_port_id, where dni_pw_ena is used as the DNI-PW enable flag; specifically, the value "1" indicates that the DNI-PW is enabled. Dni_pw_status is used to indicate whether DNI-PW switching occurs. Specifically, the value "1" indicates that DNI-PW switching has occurred. Dni_pw_l2ve_port_id is used to indicate the L2VE_Port corresponding to the DNI-PW. The combination of each type of PORT (interface) + VLAN (Virtual Local Area Network) is called an interface, which is referred to as intf_tbl. Each intf_tbl is associated with a VPWS or L3VPN, so the intf_tbl is determined, which determines the VPWS or L3VPN that the service is about to enter. The aggregation node is configured with the bridging service. Since the VLAN is already planned when the carrier is connected to the network, the virtual interface (Ve_port) can be associated to bridge the L2VPN service and the L3VPN service. The virtual interface connected to the primary VPWS is called vpws_l2ve_port_id, the virtual interface connected to the DNI-PW is called dni_pw_l2ve_port_id, and the virtual interface connected to the L3VPN service is called l3ve_port_id.

The l2ve_bridge_tbl table includes flag_to_l2ve and ve_port_id, where flag_to_l2ve is used as a flag for whether L2VE_Port has been associated; wherein a value of "1" indicates that L2VE_Port has been associated. Ve_port_id is used to indicate the corresponding L2VE_Port or L3VE_Port. Both VPWS and DNI-PW are L2VPN services, and their exits are l2ve_port_id. In the uplink service, the association between the active VPWS and the L3VPN is implemented in the working state of the active aggregation node, that is, the association between vpws_l2ve_port_id and l3ve_port_id is realized, and the association between the DNI-PW and the L3VPN is implemented in the switching state, that is, the implementation of the dni_pw_l2ve_port_id and the l3ve_port_id is implemented. Association. In general, the L2VPN exit is to achieve the association between l2ve_port_id and l3ve_port_id. In the working state of the standby aggregation node, the association between the standby VPWS and the DNI-PW is implemented, that is, the association between the vpws_l2ve_port_id and the dni_pw_l2ve_port_id is implemented, and the association between the standby VPWS and the L3VPN is implemented in the switching state, that is, the vpws_l2ve_port_id and the vpws_l2ve_port_id are implemented. The association of l3ve_port_id. In general, it is necessary to implement l2ve_port_id and l3ve_port_id, or association with l2ve_port_id at the exit of L2VPN.

Step S2. It is judged whether a failure has occurred, and if so, the process goes to step S3; if not, the process goes to step S5.

Step S3: determining the fault type, if the main path is broken, the process goes to step S4; if the main use aggregation node is dialed, the process goes to step S7; if the main use aggregation node loses power, the jump Go to step S6; wherein the specific process of determining the fault type is:

Step S31. In the downlink service, the standby VPWS looks up the l2ve_bridge_tbl table.

Step S32. It is judged whether the value of flag_to_l2ve is "1", and if so, the process proceeds to step S33; if not, the process proceeds to step S34.

Step S33. Find the corresponding L2VE_Port according to ve_port_id, and jump to step S7.

Step S34. Find the corresponding L3VE_Port of ve_port_id, and go to step S6.

Step S4: determining whether the service has been broken, if not, then going to step S5; if yes, going to step S7; wherein, the specific process of determining whether the service has been broken is:

Step S41. In the uplink service, the primary VPWS searches for the intf_tbl table.

Step S42. It is judged whether the value of dni_pw_ena is "1", and if so, the process goes to step S43; if not, the process goes to step S5.

Step S43. It is judged whether the value of dni_pw_status is "1", and if so, the process proceeds to step S7; if not, the process proceeds to step S5.

Step S5. The uplink service is connected to the L3VPN through the L2VE1 and L3VE1 at the primary aggregation node; the downlink service is connected to the active VPWS through the L3VE1 and L2VE1 at the primary aggregation node; the process ends.

Step S6. The uplink service completes the PW1:1 switching on the access device, and is connected to the L3VPN through the L2VE1 and L3VE1 at the standby aggregation node; the downlink service is in the standby aggregation section. The point is bridged to the standby VPWS through L2VE1 and L3VE1; the process ends.

Step S7. The uplink service completes the PW1:1 switching on the access device, and connects to the DNI-PW through the L2VE1 and L2VE0 bridges at the standby aggregation node, and the L3VPN to the L3VPN through the L2VE0 and L3VE1 at the primary aggregation node; the downlink service is in the primary aggregation node. The L3VE1 and L2VE0 bridges are connected to the DNI-PW, and the standby aggregation node is bridged to the standby aggregation node through L2VE0 and L2VE1; the process ends.

The embodiment of the present invention further provides a fast switching DNI-PW implementation system, which is applied to a virtual private line service VPWS network, where the VPWS network includes a primary VPWS, an alternate VPWS, a primary aggregation node, an alternate aggregation node, and a 3-layer virtual network. A dedicated network L3VPN, and a dual-node interconnected pseudowire DNI-PW is provided between the primary aggregation node and the standby aggregation node, and the system includes:

The intf_tbl table adds modules for adding the intf_tbl table to the primary VPWS. The intf_tbl table is used to determine whether the service enters the primary VPWS, alternate VPWS, or L3VPN.

The l2ve_bridge_tbl table adds a module for adding a l2ve_bridge_tbl table to the standby VPWS, and the l2ve_bridge_tbl table is used to associate the Layer 2 virtual instance interface L2VE_Port with the Layer 3 virtual instance interface L3VE_Port at the exit of the Layer 2 virtual private network L2VPN, where the L2VE_Port includes L2VE0 And L2VE1, L3VE_Port includes L3VE1.

The fault type judging module is configured to determine whether a fault occurs. If no fault occurs, the first service bridging indication signal is generated and sent to the first service bridging indication module; if a fault occurs, the fault type is determined, if the fault is used for the main use. If the node is powered off, the second service bridging indication signal is generated and sent to the second service bridging indication module. If the main aggregation node is dialed, the third service bridging indication signal is generated and sent to the third service bridging indication module. If the main path is broken, it is determined whether the service is broken, and if so, a third service bridging indication signal is generated and sent to the third service bridging indication module; if not, then A first service bridging indication signal is generated and sent to the first service bridging indication module.

The first service bridging indication module is configured to: when receiving the first service bridging indication signal, indicate that the uplink service is connected to the L3VPN through the L2VE1 and the L3VE1 in the primary aggregation node; the downlink service is connected to the main service through the L3VE1 and L2VE1 in the primary aggregation node. VPWS.

The second service bridging indication module is configured to: when receiving the second service bridging indication signal, first indicate that the uplink service completes the pseudowire PW1:1 switching on the access device, and then instructs the uplink service to be bridged to the L3VPN through the L2VE1 and L3VE1 at the standby aggregation node. The downlink service is bridged to the standby VPWS through the L2VE1 and L3VE1 at the alternate aggregation node.

The third service bridging indication module is configured to: when receiving the third service bridging indication signal, first indicate that the uplink service completes the pseudowire PW1:1 switching on the access device, and then instructs the uplink service to connect to the DNI through the L2VE1 and L2VE0 bridges at the standby aggregation node. -PW, the L3VPN is connected to the L3VPN through the L2VE0 and L3VE1 at the primary aggregation node; the downlink service is connected to the DNI-PW through the L3VE1 and L2VE0 at the primary aggregation node, and the standby aggregation node is connected to the standby aggregation node through the L2VE0 and L2VE1 at the standby aggregation node.

The present invention is not limited to the above embodiments, and those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered as protection of the present invention. Within the scope. The contents not described in detail in the present specification belong to the prior art well known to those skilled in the art.

Claims

A fast switching DNI-PW implementation method is applied to a virtual private line service VPWS network, and the VPWS network includes a primary VPWS, an alternate VPWS, a primary aggregation node, an alternate aggregation node, and a Layer 3 virtual private network L3VPN, and the main A dual node interconnected pseudowire DNI-PW is provided between the sink node and the standby sink node, and the method includes the following steps:

Step S1. Add the intf_tbl table in the primary VPWS, and add the l2ve_bridge_tbl table in the standby VPWS; wherein the intf_tbl table is used to determine that the service enters the primary VPWS, the alternate VPWS or the L3VPN, and the l2ve_bridge_tbl table is used in the Layer 2 virtual private network L2VPN. The egress associates the association between the Layer 2 virtual instance interface L2VE_Port and the Layer 3 virtual instance interface L3VE_Port, where the L2VE_Port includes L2VE0 and L2VE1, and the L3VE_Port includes L3VE1;

Step S2. Determine whether a fault occurs, if yes, then go to step S3; if not, then go to step S5;

Step S3: determining the fault type, if the main path is broken, the process goes to step S4; if the main use aggregation node is dialed, the process goes to step S7; if the main use aggregation node loses power, the jump Go to step S6;

Step S4. Determine whether the service has been broken, if yes, then go to step S7; if not, then go to step S5;

Step S5. The uplink service is connected to the L3VPN through the L2VE1 and L3VE1 at the primary aggregation node; the downlink service is connected to the active VPWS through the L3VE1 and L2VE1 at the primary aggregation node; the process ends;

Step S6. The uplink service is bridged to the L3VPN through the L2VE1 and L3VE1 at the standby aggregation node; the downlink service is connected to the standby VPWS through the L2VE1 and L3VE1 bridges at the standby aggregation node;

Step S7. The uplink service is connected to the DNI-PW through the L2VE1 and L2VE0 at the standby aggregation node, and is connected to the L3VPN through the L2VE0 and L3VE1 at the primary aggregation node; the downlink service is connected to the DNI-PW through the L3VE1 and L2VE0 bridges at the primary aggregation node. The standby aggregation node is bridged to the standby aggregation node through L2VE0 and L2VE1; the process ends.
The fast switching DNI-PW implementation method according to claim 1, wherein in step S1, the intf_tbl table includes

Dni_pw_ena, used as the DNI-PW enable flag; where the value "1" indicates that the DNI-PW is enabled;

Dni_pw_status, used to indicate whether DNI-PW switching occurs; wherein the value "1" indicates that DNI-PW switching has occurred;

Dni_pw_l2ve_port_id is used to indicate the L2VE_Port corresponding to the DNI-PW.
The method for implementing the fast-switching DNI-PW according to claim 2, wherein the specific process of determining whether the service has been broken by the step S4 is:

Step S41. In the uplink service, the primary VPWS searches for an intf_tbl table;

Step S42. Determine whether the value of dni_pw_ena is "1", if yes, then go to step S43; if not, then go to step S5;

Step S43. It is judged whether the value of dni_pw_status is "1", and if so, the process proceeds to step S7; if not, the process proceeds to step S5.
The fast switching DNI-PW implementation method according to claim 1, wherein in step S1, the l2ve_bridge_tbl table includes

Flag_to_l2ve, used as a flag for whether L2VE_Port has been associated; wherein the value "1" indicates that the L2VE_Port is associated;

Ve_port_id, used to indicate the corresponding L2VE_Port or L3VE_Port.
The fast switching DNI-PW implementation method according to claim 4, wherein the specific process of determining the fault type in step S3 is:

Step S31. In the downlink service, the standby VPWS searches for the l2ve_bridge_tbl table;

Step S32. Determine whether the value of flag_to_l2ve is "1", and if so, then go to step S33; if not, then go to step S34;

Step S33. Find the corresponding L2VE_Port according to ve_port_id, and jump to step S7;

Step S34. Find the corresponding L3VE_Port of ve_port_id, and go to step S6.
The fast switching DNI-PW implementation method according to any one of claims 1 to 5, wherein in the step S1, the L2VPN includes a VPWS and a DNI-PW.
The fast-switching DNI-PW implementation method according to any one of claims 1 to 5, wherein in step S6 and step S7, the following steps are first performed: the uplink service completes the pseudowire PW1:1 on the access device. Switched.
The fast switching DNI-PW implementation method according to any one of claims 1 to 5, characterized in that the primary VPWS and the standby VPWS each comprise a plurality of pseudowires.
A fast switching DNI-PW implementation system is applied to a virtual private line service VPWS network, and the VPWS network includes a primary VPWS, an alternate VPWS, a primary aggregation node, an alternate aggregation node, and a Layer 3 virtual private network L3VPN, and the main A dual-node interconnected pseudowire DNI-PW is provided between the sink node and the standby sink node, and the system includes:

The intf_tbl table adds a module for adding an intf_tbl table to the primary VPWS. The intf_tbl table is used to determine whether the service enters the primary VPWS, alternate VPWS, or L3VPN.

The l2ve_bridge_tbl table adds a module for adding a l2ve_bridge_tbl table to the standby VPWS, and the l2ve_bridge_tbl table is used to associate the Layer 2 virtual instance interface L2VE_Port with the Layer 3 virtual instance interface L3VE_Port at the exit of the Layer 2 virtual private network L2VPN, where the L2VE_Port includes L2VE0 And L2VE1, L3VE_Port includes L3VE1;

The fault type judging module is configured to determine whether a fault occurs, and if no fault occurs, generate a first service bridging indication signal, and send the first service bridging indication module to the first service bridging indication module;

If a fault occurs, determining the fault type, if the primary sink node is powered off, generating a second service bridging indication signal, and transmitting the second service bridging indication module to the second service bridging indication module;

If the main aggregation node is dialed, the third service bridging indication signal is generated and sent to the third service bridging indication module;

If the main path is broken, it is determined whether the service is broken. If yes, the third service bridging indication signal is generated and sent to the third service bridging indication module; if not, the first service bridging indication signal is generated, and Sending to the first service bridging indication module;

The first service bridging indication module is configured to: when receiving the first service bridging indication signal, indicate that the uplink service is connected to the L3VPN through the L2VE1 and the L3VE1 in the primary aggregation node; the downlink service is connected to the main service through the L3VE1 and L2VE1 in the primary aggregation node. VPWS;

The second service bridging indication module is configured to: when receiving the second service bridging indication signal, indicate that the uplink service is bridged to the L3VPN by the L2VE1 and the L3VE1 at the standby aggregation node; the downlink service is connected to the standby VPWS by the L2VE1 and the L3VE1 bridge at the standby aggregation node;

The third service bridging indication module is configured to: when receiving the third service bridging indication signal, indicate that the uplink service is connected to the DNI-PW through the L2VE1 and L2VE0 bridges at the standby aggregation node, and the L3VPN is connected to the L3VPN through the L2VE0 and L3VE1 at the primary aggregation node; The service is connected to the DNI-PW through the L3VE1 and L2VE0 at the primary aggregation node, and is connected to the standby aggregation node through the L2VE0 and L2VE1 at the standby aggregation node.
The fast-switching DNI-PW implementation system of claim 9, wherein the second service bridging indication module first indicates that the uplink service completes the PW 1:1 on the access device when receiving the second service bridging indication signal. When the third service bridging indication module receives the third service bridging indication signal, it first instructs the uplink service to complete the pseudowire PW1:1 switching on the access device.