CN103634423B - Three-layered interface based MPLS-TP (multi-protocol label switching-transport profile) configuration method and device - Google Patents

Abstract

The embodiment of the present invention provides a MPLS-TP configuration method and device based on a layer-3 interface. The method includes: sending an ARP request for the label information through each VLAN interface according to the VLAN interface information in the label address table stored by itself. message; receive the returned ARP reply message of the label information, compare the MAC address information and outbound port information carried in the ARP reply message with the information in the label address table, and when it is determined that it is consistent with the purpose in the label address table When the MAC address information and the outgoing port information are inconsistent, update the label address table. Because in the embodiment of the present invention, by establishing the mapping list of label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information, when the network topology changes, the information of the next-hop node can be updated in time , thus greatly improving the flexibility of PTN equipment configuration.

Description

An MPLS-TP configuration method and device based on a layer-3 interface

technical field

The invention relates to the technical field of industrial network communication, in particular to an MPLS-TP configuration method and device based on a three-layer interface.

Background technique

The large-scale application of 3G transmission and IP data communication has enriched the rapid development of packet switching technology. The Layer 2 virtual private network (Virtual Private Network, VPN) solution based on Multi-Protocol Label Switching - Transport Profile (MPLS-TP) overcomes the shortcomings of traditional ATM or FR network expansion complexity, By using the label stack technology, MPLS-TP VPN can multiplex multiple virtual circuits in a layered service provider (Layered Service Provider, LSP), and the provider edge (PE) only needs to maintain one LSP information, thus greatly improving the system scalability. MPLS-TP L2 VPN reduces the complexity of VPN service provisioning and enhances security, especially when adding sites to the existing VPN, in most cases it is only necessary to connect the provider edge router to the new site, Correspondingly, the cycle of service provision is reduced.

By adopting MPLS-TP technology, many services such as Layer 2 VPN, Layer 3 VPN, traffic engineering and Diffserv can be run in the multi-converged network. The MPLS-TP VPN solution based on the second layer provides The VPN networks are completely independent, that is, there is no routing exchange between the PE equipment at the operator's border and the user edge (CE) equipment, and the operator simply provides some Layer 2-based network functions to customers. From the customer's point of view, the operator simply provides a simple Layer 2 connection.

In the application of PTN equipment based on the application of MPLS-TP technology, the MAC address of the peer node needs to be obtained between the ports of the local node and the peer node, which is used to encapsulate the destination MAC address of the MPLS message. Identify whether the destination MAC address in the message is the MAC address of the node after the text, and then identify the service label, and the OAM standard G.8113.1 of MPLS-TP has been formally defined soon, and the corresponding products are not mature enough, so, it has been The OAM function compatibility and flexibility of some software platforms are not satisfactory.

The traditional application solution using the layer-3 interface needs to specify the port on the network side, or adopt the solution that does not implement the layer-3 interface, and manually write the MAC address of the peer end by directly specifying the port on the network side. Therefore, the prior art solution has the problem that the configuration flexibility of the PTN equipment is poor and cannot adapt to the change of the network topology.

Contents of the invention

The embodiment of the present invention provides an MPLS-TP configuration method and device based on a layer-3 interface, which is used to solve the problem in the prior art that PTN equipment with a layer-3 interface has poor configuration flexibility and cannot adapt to network topology changes.

The embodiment of the present invention provides a kind of MPLS-TP configuration method based on three-layer interface, and this method comprises:

Receive the configuration start command to wake up the synchronous semaphore, search the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next hop IP address information, and send the ARP of the label information through each VLAN interface found. Request message, wherein, label information, next hop IP address information, VLAN information, outgoing port information and destination MAC address information are stored in the label address table;

Receive the returned ARP reply message of the tag information, obtain the destination MAC address information, outgoing port information and VLAN information carried in the ARP reply message, according to the tag information and the VLAN information of the ARP reply message, in Find the corresponding destination MAC address information and outbound port information in the label protocol table;

Comparing the found MAC address information and outgoing port information with the MAC address information and outgoing port information carried in the ARP reply message, when it is determined that the destination MAC address information and outgoing port information are carried in the ARP reply message When the port information is inconsistent, the label address table is updated according to the destination MAC address information and the outgoing port information carried in the ARP reply message.

The embodiment of the present invention provides a kind of MPLS-TP configuration device based on three-layer interface, and this device comprises:

The search sending module is used to receive the configuration start command to wake up the synchronous semaphore, search the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next hop IP address information, and pass each VLAN interface found by the search Sending the ARP request message of the label information, wherein the label address table stores label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information;

The ARP processing module is used to receive the returned ARP reply message of the label information, obtain the destination MAC address information, outgoing port information and VLAN information carried in the ARP reply message, and according to the label information and the ARP reply message VLAN information of the text, look up the corresponding destination MAC address information and outbound port information in the label protocol table;

The configuration update module is used to compare the MAC address information and the outgoing port information of the purpose found with the MAC address information and the outgoing port information carried in the ARP reply message, and when it is determined that it is the same as that carried in the ARP reply message When the destination MAC address information and the egress port information are inconsistent, the label address table is updated according to the destination MAC address information and the egress port information carried in the ARP reply message.

Embodiments of the present invention provide a layer-3 interface-based MPLS-TP configuration method and device, the method comprising: according to the VLAN interface information in the label address table saved by itself, sending the ARP of each label information through each VLAN interface Request message; receive the returned ARP reply message of the label information, compare the MAC address information and the outbound port information carried in the ARP reply message with the information in the label address table, and when it is determined that it is consistent with the information in the label address table When the destination MAC address information and the egress port information are inconsistent, the label address table is updated. Because in the embodiment of the present invention, by establishing the mapping list of label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information, when the network topology changes, the information of the next-hop node can be updated in time , thus greatly improving the flexibility of PTN equipment configuration.

Description of drawings

Fig. 1 is a kind of schematic diagram of MPLS-TP configuration process based on three-layer interface provided by the embodiment of the present invention;

Figure 2 is a schematic diagram of the layer-3 interface-based MPLS-TP configuration process triggered by the port UP event of the first access provided by the embodiment of the present invention;

FIG. 3 is a schematic diagram of a specific implementation process of MPLS-TP configuration based on a layer-3 interface provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a system for realizing an OAM processing function provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an MPLS-TP configuration device based on a layer-3 interface provided by an embodiment of the present invention;

detailed description

In order to effectively reduce the maintenance cost of PTN equipment, save resources and improve configuration flexibility, the present invention provides an MPLS-TP configuration method and device based on a three-layer interface.

The present invention will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a kind of schematic diagram of MPLS-TP configuration process based on three-layer interface that the embodiment of the present invention provides, and this process comprises the following steps:

S101: Receive the configuration start command to wake up the synchronous semaphore, search the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next-hop IP address information, and send the label information through each VLAN interface found. ARP request message, wherein the label address table stores label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information.

The configuration of the PE device is saved to the main CPU. The main CPU controls the ARP processing module in the switch module through the PCIE interface, stores the next-hop IP address information of each port of the device node, and controls the opening/closing of the MPLS function.

When the configuration start command is received, a tag code is selected from the tag station, and the corresponding VLAN information is searched through the tag code and the next-hop IP address information stored in the local tag address table, and corresponding to the tag code. Each VLAN interface of each VLAN interface sends an ARP request message, and then selects another label code in the label stack to repeat the above process until each label code in the label stack is sent once, wherein, selecting the label code from the label stack can be in order selection, or random selection.

S102: Receive the returned ARP reply message of the tag information, obtain the destination MAC address information, egress port information and VLAN information carried in the ARP reply message, and according to the tag information and the VLAN information of the ARP reply message , look up the corresponding destination MAC address information and outbound port information in the label protocol table.

When the main CPU configures the next-hop IP address information, it wakes up the synchronous semaphore, and then searches for the VLAN it belongs to through the next-hop IP, and sends the next-hop IP and VLAN configuration information to the ARP processing module in turn, and the ARP processing module returns each The VLAN information of the ARP reply message and the label code corresponding to the ARP reply message are searched for corresponding entries in the label protocol table.

In the present invention, in order to solve the problem that the ARP reply message cannot be received due to reasons such as packet loss and network anomalies, after sending the ARP request message of each label code, a timer is started, and the timer is overtime and determined The ARP reply packet of the label code has not been received.

S103: Compare the found destination MAC address information and egress port information with the MAC address information and egress port information carried in the ARP reply message.

Each ARP reply message contains the next-hop destination MAC address information and outbound port information of the label corresponding to the ARP reply message, and it is judged that the destination MAC address information carried in the ARP reply message is consistent with the label protocol table. Whether the destination MAC address information is consistent, if the comparison result is consistent, judge whether the outbound port information carried in the ARP reply message is consistent with the outbound port information in the label protocol table

Wherein, the destination MAC address information and the egress port information change with the change of the network topology.

S104: When it is determined that the destination MAC address information and the egress port information carried in the ARP reply message are inconsistent, update the label address table according to the destination MAC address information and the egress port information carried in the ARP reply message.

Specifically, obtain the destination MAC address information and the outgoing port information in the ARP reply message of each label code, and judge whether the destination MAC address information carried in the ARP reply message is consistent with the destination MAC address information in the label protocol table, When it is determined that the destination MAC address information is inconsistent, update the destination MAC address information and the outgoing port information in the label protocol table to the destination MAC address information and port information carried in the ARP reply message;

When the destination MAC address information is consistent, judge whether the outbound port information carried in the ARP reply message is consistent with the outbound port information in the label protocol table, and update the outbound port information in the label protocol table when it is determined that the outbound port information is inconsistent It is the port information carried in the ARP reply message, where the destination MAC address information and the outbound port information are compared in no particular order.

Since the embodiment of the present invention monitors the destination MAC address information and the outgoing port information of the next hop, when the network topology changes, the entries in the local label protocol table can be updated in time, thereby avoiding Changes require manual configuration of information, resulting in a waste of resources and improving the flexibility of configuration.

In order to collect the destination MAC address information and the outgoing port information of the next hop in time, the trigger condition of the present invention opens the configuration start command and includes:

Enable MPLS through user command configuration, and wake up the synchronization semaphore when configuring the IP address of the next hop; or,

Through the UP event of the port, the port on the network side is triggered to send an ARP request message; or,

When the ARP update event of the layer-3 interface is used, the hardware is triggered to download the label configuration.

Specifically, when the initial configuration of the network architecture is completed, according to the topology of the current network, the user configures and enables MPLS through commands, which is triggered when the initial label protocol table entry is established, and the user can reserve physical interfaces as needed , configure the next-hop IP address and VLAN interface corresponding to each tag code in advance, when the reserved physical interface is connected to the device or the network topology changes, it will also trigger the network side port to send an ARP request message; or to the user When updating the ARP of the layer-3 interface, downloading the label configuration through the hardware will also trigger this operation.

In addition, in the present invention, when the label address table changes, in order to quickly build a new multi-protocol label switching tunnel and ensure the normal transmission of MPLS-TP messages, after the self-saved label address table is updated, the method further includes :

Clear the established cross-connect AC service, and update the MPLS tunnel and all virtual circuit interfaces carried on the tunnel according to the VLAN information, destination MAC address information, egress port information and the label information carried in the ARP reply message , and create a new cross-connect AC service.

Specifically, when an entry in the locally stored label protocol table changes, the AC forwarding module deletes the cross-connect established before the entry according to the label code, destination MAC address information, and outbound port information of the entry. For AC services, establish a multi-protocol label switching tunnel and all virtual circuit interfaces carried on the tunnel before destroying the appearance; according to the updated label code, destination MAC address information, outgoing port information, and locally saved VLAN information and The next-hop IP address information establishes a new MPLS tunnel, and establishes all virtual circuit interfaces carried by the tunnel, and finally establishes a new cross-connection AC service.

When a physical port in the network is connected to a new device, the configuration command is started through the port UP event to configure the next hop of the new device, and according to the VLAN information of the ARP reply message corresponding to each tag code, the Set up a new table item in, described according to the VLAN information of this label information and described ARP reply message, look up corresponding purpose MAC address information and outgoing port information in the label protocol table and include:

According to the VLAN information and the label information in the ARP reply message, search in the label address table, and judge whether there are corresponding destination MAC address information and outgoing port information stored in the label address table;

When it is determined that the corresponding destination MAC address information and outgoing port information are not saved in the label address table, according to the VLAN information, destination MAC address information, outgoing port information and the label information in the ARP reply message, create a multi-protocol Label the tunnel and the interfaces of all virtual circuits carried by the tunnel, and create cross-connect AC services.

Specifically, when the network topology of the networking changes and the new node device uses the reserved physical port to connect to the network, the port on the network side is triggered to send an ARP request message, and the PE device passes the label code in the label stack and the next hop IP address, find the corresponding VLAN information in the label protocol table saved locally, and send an ARP request message to the new node device through the VLAN interface. After receiving the ARP request message, the new node device sends its own MAC address information and The outbound port information is returned to the PE device through the ARP reply message, and the PE device obtains the destination MAC address information, outbound port information, and VLAN information of the ARP reply message, and according to the VLAN information, the tag code corresponding to the ARP reply message is placed on the label Search in the protocol table. Since the corresponding destination MAC address information and outbound port information are not found in the label protocol table, it is determined to be the first learned destination MAC address information and outbound port information. According to the information contained in the ARP reply message Destination MAC address information, outgoing port information, VLAN information, and locally stored next-hop IP address information and label code to create a new entry in the label protocol table, and according to the VLAN information and destination MAC address in the ARP reply message information, egress port information, and the label information, create a multi-protocol label tunnel and interfaces of all virtual circuits carried on the tunnel, and create cross-connect AC services.

Fig. 2 is the schematic diagram of the MPLS-TP configuration process based on the three-layer interface triggered by the port UP event of the first access provided by the embodiment of the present invention, and the process includes the following steps:

S201: The port UP event triggers a configuration start command to wake up the synchronization semaphore, and searches the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next-hop IP address information.

S202: Send an ARP request packet of the tag information through each found VLAN interface.

S203: Receive the returned ARP reply message of the label information, and obtain the destination MAC address information, egress port information and VLAN information carried in the ARP reply message.

S204: According to the label information and the VLAN information of the ARP reply message, look up the corresponding destination MAC address information and egress port information in the label protocol table.

S205: Judging whether the corresponding destination MAC address information or outgoing port information is saved in the label address table, if the judging result is yes, go to step S206; otherwise, go to step S207.

S206: Judging whether the found MAC address information and outgoing port information of the destination are consistent with the MAC address information and outgoing port information carried in the ARP reply message, when the judgment result is yes, keep the label address table unchanged, otherwise , go to step S207. .

S207: Update the label address table according to the destination MAC address information and the egress port information carried in the ARP reply message.

S208: Clear the established cross-connection AC service, and update the Multi-Protocol Label Switching Tunnel and all virtual circuit interface, and create a new cross-connect AC service.

Specifically, in the embodiment of the present invention, users are supported to configure reserved ports as required during networking. By configuring the next-hop IP address, VLAN information, and corresponding label information of the reserved port in the label protocol table, it is possible to The node equipment newly connected to the network only needs to be connected to the reserved physical port to realize the normal communication of MPLS packets.

In addition, in the present invention, in order to improve the compatibility of the OAM message, flexibly realize the feature extension function of the G.8113.1 standard, support the processing of the OAM message carrying VLAN and UNTAG, according to the entry in the label protocol table after the change After establishing a new cross-connect AC service, the method further includes:

Create a local maintenance point and a remote maintenance point according to the interface of the MPLS tunnel and the interface of the virtual circuit carried by the tunnel, mirror the CCM message received by the switching chip to the slave CPU, and redirect the CCM message sent from the CPU to the output port of the switch chip;

The loopback packets received by the mirrored switch chip are sent to the main CPU, and the loopback packets sent by the main CPU are redirected to the egress port of the switch chip.

Specifically, the FP control module redirects and mirrors OAM messages and forwards them to the master CPU and the slave CPU, which can support the reception of messages with or without VLANs, and the OAM message receiving task is hooked in the interruption of receiving messages interface, when the AC forwarding module establishes a new cross-connection AC service according to the modified entry in the label protocol table, it notifies the OAM processing module to perform OAM processing, and the OAM processing module Create a virtual circuit interface, create a local maintenance point (MEP) and a remote maintenance point, mirror the CCM message to the slave CPU at the same time, and redirect the CCM message sent from the CPU to the egress port of the switch chip, and then transfer the ring The back LB message is mirrored to the primary CPU, and the loopback message sent by the main CPU is redirected to the egress port of the switch chip.

Fig. 3 is a schematic diagram of a specific implementation process of MPLS-TP configuration based on a layer-3 interface provided by the embodiment of the present invention, and the process includes the following steps:

S301: Receive a configuration start command to wake up the synchronous semaphore, and search the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next-hop IP address information.

S302: Send an ARP request packet of the tag information through each found VLAN interface.

S303: Receive the returned ARP reply message of the label information, and obtain the destination MAC address information, egress port information and VLAN information carried in the ARP reply message.

S304: According to the label information and the VLAN information of the ARP reply message, look up the corresponding destination MAC address information and egress port information in the label protocol table.

S305: Judging whether the found MAC address information and egress port information of the destination are consistent with the MAC address information and egress port information carried in the ARP reply message, when the determination result is yes, keep the label address table unchanged, otherwise , go to step S306.

S306: Update the label address table according to the destination MAC address information and the egress port information carried in the ARP reply message.

S307: Clear the established cross-connection AC service, and update the Multi-Protocol Label Switching Tunnel and all virtual circuit interface, and create a new cross-connect AC service.

S308: Create a local maintenance point and a remote maintenance point according to the interface of the MPLS tunnel and the interface of the virtual circuit carried by the tunnel.

S309: Mirror the CCM message received by the switch chip to the slave CPU, and redirect the CCM message sent from the CPU to the egress port of the switch chip.

S310: mirroring the loopback message received by the switch chip to the main CPU, and redirecting the loopback message sent by the main CPU to the output port of the switch chip.

In the present invention, by configuring MEG ID, bound segment layer port, tunnel ID and virtual circuit ID, local/remote MEP ID, and sending period of CCM message. MPLS-TP OAM is divided into segment layer, LSP layer and PW layer, so that OAM entities are established on different layer interfaces, and correspondingly, three databases are established to store data. By using the balanced binary tree algorithm, the traversal speed is accelerated, the configuration flexibility of MPLS-TP OAM is improved, and the compatibility of OAM packets is also increased.

FIG. 4 is a schematic structural diagram of a system for realizing OAM processing functions provided by an embodiment of the present invention, and the system includes an ARP learning module, an FP processing module, a CCM processing module, and a LB processing module. Wherein, the ARP learning module establishes the neighbor's ARP address table, and retrieves whether the OAM function is bound at the MPLS-TP OAM interface of the section layer port, tunnel (TUNNEL) ID and virtual circuit PW ID. Update the destination MAC address (DMAC) and port of the next-hop device in the database according to the OAM interface, as well as the inner and outer labels, and update the database of the slave CPU through the RPC interface at the same time. The FP processing module is used to redirect and mirror the main CPU and receive MPLS-TP OAM messages from the CPU, and establish the mapping between CCM messages and network side ports according to the ARP learning module. The CCM processing module sends and receives CCM messages according to the OAM interface, checks the MEP table in the database, and handles alarms. The LB processing module sends and receives LB/LT messages according to the OAM interface, checks the MEP table in the database, and handles alarms.

Specifically, when the system is started, the FP control module redirects and mirrors the OAM message and forwards it to the master CPU and the slave CPU. It can support the reception of packets with or without VLAN. The OAM message receiving task hooks up the hook interface in the message receiving interrupt.

The user command configuration task configures the OAM interface, MEG ID, LEVEL and other information through the user interface module, and then configures the local/remote MEP and CCM parameters. Multiple MEG IDs can be bound to the same OAM interface (different levels) to realize OAM business nesting. The database adopts the balanced binary tree algorithm to store the data structure indexed by MEG ID, and finally establishes the MEP lookup table indexed by OAM interface (segment layer port/TUNNEL ID/PW ID) and LEVEL.

When creating an MEP lookup table, whether to create the next hop depends on the port connection status on the MPLS network side. The next hop information includes information such as the next hop DMAC, the physical port, and the MPLS label of the segment layer port/TUNNEL ID/PW ID corresponding to the OAM interface. The next hop information is created by triggering the ARP learning module through the UP event of the physical port, taking out the label data from the MPLS configuration to dynamically update the database, and updating the database of the slave CPU at the same time. When the device is started, the UP event of the physical port corresponding to MPLS triggers the ARP learning module to learn the next hop information and save it in the database. Prevent the master CPU from starting before the slave CPU, causing the database to be out of sync.

The invention realizes the function of MPLS-TP OAM for dual CPUs. The slave CPU is used to process CCM packets through the FP function of the switch chip, and the master CPU is used to process other types of OAM packets. The fixed port connected from the CPU to the switch chip is used to send and receive service packets. Through the RPC communication with the main CPU to complete the change of the state machine to realize the OAM function, and actively report the OAM alarm information.

Fig. 5 is a schematic structural diagram of an MPLS-TP configuration device based on a layer-3 interface provided by an embodiment of the present invention, the device comprising:

Search and send module 51, be used for receiving configuration start instruction to wake up synchronous semaphore, according to label information and next hop IP address information, search corresponding VLAN interface information in the label address table that self saves, through each VLAN that finds out The interface sends the ARP request message of the label information, wherein the label address table stores label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information;

The ARP processing module 52 is configured to receive the returned ARP reply message of the label information, obtain the destination MAC address information, outgoing port information and VLAN information carried in the ARP reply message, and reply according to the label information and the ARP reply message. For the VLAN information of the message, look up the corresponding destination MAC address information and outbound port information in the label protocol table;

The configuration update module 53 is used to compare the MAC address information and the outgoing port information of the purpose found with the MAC address information and the outgoing port information carried in the ARP reply message. When carrying destination MAC address information and outgoing port information inconsistent, the label address table is updated according to the destination MAC address information and outgoing port information carried in the ARP reply message.

The device also includes:

The configuration startup module 54 is used to enable MPLS through user command configuration, and wake up the synchronization semaphore when configuring the IP address of the next hop; or, through the UP event of the port, trigger the network side port to send the ARP request message; or, through When the ARP update event of the layer-3 interface is triggered, the hardware downloads the label configuration.

The device also includes:

The ARP processing module 52 is also used to search in the label address table according to the VLAN information and the label information in the ARP reply message, and judge whether the corresponding destination MAC address information and outgoing port information are stored in the label address table ;

The AC forwarding module 55 is used for when it is determined that the corresponding destination MAC address information and outgoing port information are not stored in the label address table, according to the VLAN information, destination MAC address information, outgoing port information and The label information is used to create a multi-protocol label tunnel and interfaces of all virtual circuits carried on the tunnel, and to create a cross-connect AC service.

The AC forwarding module 55 is also used to clear the established cross-connection AC service, and update the multi-protocol label switching tunnel according to the VLAN information, destination MAC address information, outgoing port information and the label information carried in the ARP reply message and all virtual circuit interfaces carried by the tunnel, and create a new cross-connect AC service.

The device also includes:

The OAM processing module 56 is used to create a local maintenance point and a remote maintenance point according to the multi-protocol label switching tunnel interface and the interface of the virtual circuit carried on the tunnel, and mirror the CCM message received by the switching chip to the slave CPU for redirection The CCM message sent from the CPU is sent to the output port of the switch chip; the loopback message received by the mirrored switch chip is sent to the main CPU, and the loopback message sent by the redirected main CPU is sent to the output port of the switch chip.

Embodiments of the present invention provide a layer-3 interface-based MPLS-TP configuration method and device, the method comprising: according to the VLAN interface information in the label address table saved by itself, sending the ARP of each label information through each VLAN interface Request message; receive the returned ARP reply message of the label information, compare the MAC address information and the outbound port information carried in the ARP reply message with the information in the label address table, and when it is determined that it is consistent with the information in the label address table When the destination MAC address information and the egress port information are inconsistent, the label address table is updated. Because in the embodiment of the present invention, by establishing the mapping list of label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information, when the network topology changes, the information of the next-hop node can be updated in time , thus greatly improving the flexibility of PTN equipment configuration.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and combinations of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a Means for realizing the functions specified in one or more steps of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. a kind of MPLS-TP configuration method based on three-layer interface, it is characterized in that, described method comprises: Receive the configuration start command to wake up the synchronous semaphore, search the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next hop IP address information, and send the ARP request report of the label information through each VLAN interface found The text, wherein, label information, next hop IP address information, VLAN information, outgoing port information and destination MAC address information are stored in the label address table; Receive the returned ARP reply message of the tag information, obtain the destination MAC address information, outgoing port information and VLAN information carried in the ARP reply message, according to the tag information and the VLAN information of the ARP reply message, in Find the corresponding destination MAC address information and outbound port information in the label protocol table; Comparing the found MAC address information and outgoing port information with the MAC address information and outgoing port information carried in the ARP reply message, when it is determined that the destination MAC address information and outgoing port information are carried in the ARP reply message When the port information is inconsistent, according to the destination MAC address information and outgoing port information carried in the ARP reply message, update the destination MAC address information and outgoing port information in the label address table to the destination MAC address information carried in the ARP reply message. Address information and outbound port information, and update the label address table. 2. The method according to claim 1, wherein the configuration startup instruction comprises: Enable MPLS through user command configuration, and wake up the synchronization semaphore when configuring the IP address of the next hop; or, Through the UP event of the port, the port on the network side is triggered to send an ARP request message; or, When the ARP update event of the layer-3 interface is used, the hardware is triggered to download the label configuration. 3. The method according to claim 1, wherein, according to the VLAN information of the label information and the ARP reply message, searching for corresponding destination MAC address information and outgoing port information in the label protocol table comprises: According to the VLAN information and the label information in the ARP reply message, search in the label address table, and judge whether there are corresponding destination MAC address information and outgoing port information stored in the label address table; When it is determined that the corresponding destination MAC address information and outgoing port information are not stored in the label address table, according to the VLAN information, destination MAC address information, outgoing port information and the label information in the ARP reply message, create a multi-protocol Label the tunnel and the interfaces of all virtual circuits carried by the tunnel, and create cross-connect AC services. 4. The method according to claim 1, characterized in that, after the tag address table is updated, the method further comprises: Clear the established cross-connect AC service, and update the MPLS tunnel and all virtual circuit interfaces carried on the tunnel according to the VLAN information, destination MAC address information, egress port information and the label information carried in the ARP reply message , and create a new cross-connect AC service. 5. The method according to claim 3 or 4, further comprising: Create a local maintenance point and a remote maintenance point according to the interface of the MPLS tunnel and the interface of the virtual circuit carried by the tunnel, mirror the CCM message received by the switching chip to the slave CPU, and redirect the CCM message sent from the CPU to the output port of the switch chip; The loopback packets received by the mirrored switch chip are sent to the main CPU, and the loopback packets sent by the main CPU are redirected to the egress port of the switch chip. 6. A kind of MPLS-TP configuration device based on three-layer interface, it is characterized in that, described device comprises: The search sending module is used to receive the configuration start command to wake up the synchronous semaphore, search the corresponding VLAN interface information in the label address table saved by itself according to the label information and the next hop IP address information, and send the information through each VLAN interface found. An ARP request message for label information, wherein label information, next-hop IP address information, VLAN information, outgoing port information and destination MAC address information are stored in the label address table; The ARP processing module is used to receive the returned ARP reply message of the label information, obtain the destination MAC address information, outgoing port information and VLAN information carried in the ARP reply message, and according to the label information and the ARP reply message VLAN information of the text, look up the corresponding destination MAC address information and outbound port information in the label protocol table; The configuration update module is used to compare the MAC address information and the outgoing port information of the purpose found with the MAC address information and the outgoing port information carried in the ARP reply message, and when it is determined that it is the same as that carried in the ARP reply message When the destination MAC address information and the outgoing port information are inconsistent, according to the destination MAC address information and the outgoing port information carried in the ARP reply message, the destination MAC address information and the outgoing port information in the label address table are updated to the ARP reply report. The destination MAC address information and outbound port information carried in the text update the label address table. 7. The device of claim 6, further comprising: Configure the startup module, which is used to enable MPLS through user command configuration, and wake up the synchronization semaphore when configuring the IP address of the next hop; or, through the UP event of the port, trigger the port on the network side to send an ARP request message; or, through When an ARP update event occurs on a Layer 3 interface, the hardware is triggered to download the label configuration. 8. The device of claim 6, further comprising: The ARP processing module is also used to search in the label address table according to the VLAN information and the label information in the ARP reply message, and judge whether the corresponding destination MAC address information and outgoing port information are stored in the label address table; The AC forwarding module is configured to respond to the VLAN information, destination MAC address information, outbound port information and Label information, create a multi-protocol label tunnel and interfaces of all virtual circuits carried by the tunnel, and create cross-connect AC services. 9. The device according to claim 6, wherein the AC forwarding module is further configured to clear the established cross-connection AC service, according to the ARP reply message carrying VLAN information, destination MAC address information, Outgoing port information and the label information, update the multi-protocol label switching tunnel and all virtual circuit interfaces carried on the tunnel, and create a new cross-connect AC service. 10. The device according to claim 8 or 9, further comprising: The OAM processing module is used to create a local maintenance point and a remote maintenance point according to the multi-protocol label switching tunnel interface and the interface of the virtual circuit carried on the tunnel, mirror the CCM message received by the switching chip to the slave CPU, and redirect the slave CPU The CCM message sent by the CPU is sent to the output port of the switch chip; the loopback message received by the mirrored switch chip is sent to the main CPU, and the loopback message sent by the redirected main CPU is sent to the output port of the switch chip.