CN107872338A - Network management system, service configuration, service configuration request method and device - Google Patents

Abstract

The invention provides NMS, business configuration, business configuration requesting method and device, the wherein business collocation method include：Path according to being carried in the business configuration request received determines that condition determines business configuration path, wherein, business configuration request is that operation layer is sent；Destination path in the business configuration path is sent to software defined network SDN equipment, wherein, the destination path is used to carry out business configuration to the SDN equipment.By the present invention, solve the problems, such as in correlation technique in correlation technique the problem of service deployment free degree low otherness deficiency, increase the otherness optimization customer service configuration experience of service deployment.

Description

Network management system, service configuration, service configuration request method and device

technical field

The invention relates to the field of data network communication, in particular to a network management system, a service configuration, a service configuration request method and a device.

Background technique

After the software-defined network (Software Defined Network, referred to as SDN) appeared, end-to-end service rapid deployment has become an important feature of SDN. cumbersome. For the commonly used L2VPN and L3VPN services, users generally only need to specify the service access point and send a small number of necessary parameters to the SDN controller to automatically activate a service. The SDN controller will automatically create an end-to-end multi-protocol label switch (MPLS for short) traffic engineering (Traffic Engineering, TE for short) dynamic or static tunnel while configuring the VPN service of the virtual private network. The path is automatically calculated by the controller and automatically deployed to the SDN network device, as shown in Figure 1. Generally, the controller will calculate an optimal path based on the shortest path algorithm by default. However, in the case of a complex network, there may be multiple options for the tunnel path. Especially in the scenario of configuring MSPW services, if the user specifies multiple service switching points, the order of switching points is also involved. In this case Once the service configuration is completed, the user needs to re-adjust the configuration if the switching point sequence or service path cannot meet the requirements. In related technologies, the controller automatically calculates the path without giving the user a chance to choose, which greatly weakens the advantages embodied in the SDN organizational structure and affects user experience.

For the problem of low degree of freedom and insufficient diversity of service deployment in related technologies, no effective solution has been proposed in the prior art.

Contents of the invention

The purpose of the present invention is to provide a network management system, a service configuration, a service configuration request method and device, and solve the problem of low degree of freedom and insufficient difference in service deployment in the related art.

According to one aspect of the present invention, a service configuration method is provided, including: determining a service configuration path according to path determination conditions carried in a received service configuration request, wherein the service configuration request is sent by the service layer; The target path in the path is sent to the SDN network device, where the target path is used to perform service configuration on the SDN network device.

Further, sending the target path in the service configuration path to the SDN network device includes: determining a target path from the service configuration path, wherein the service configuration path includes multiple paths; sending the target path to the SDN Network equipment.

Further, determining a target path from the service configuration paths includes: receiving a path selection instruction, wherein the path selection instruction is used to indicate selecting the target path; and selecting the target path from the service configuration paths in response to the path selection instruction.

Further, determining the service configuration path according to the path determination condition carried in the received service configuration request includes: judging whether a multi-segment pseudowire MSPW service is configured; The PW path of each pseudowire PW and the TE tunnel path corresponding to the PW path, wherein the service configuration path includes: the PW path and the TE tunnel path; a target PW path is determined from the PW path, and a target PW path is determined from the PW path. A target TE tunnel path is determined among the TE tunnel paths corresponding to the target PW path, wherein the target PW path and the target TE tunnel path are used as the target path in the service configuration path.

Further, the determining a target PW path from the PW paths includes: determining a target PW path from the PW paths according to the order of the switching points when the switching point of the MSPW service is configured.

Further, the order of the switching point is determined by the following steps: judging whether the switching point sequence information issued by the business layer is received; if the judgment result is yes, determining the sequence indicated by the switching point sequence information as the switching point The order of the points; in the case of the judgment result being negative, determine the exchange point order according to the shortest path condition.

Further, before determining the service configuration path according to the path determination condition carried in the received service configuration request, the method further includes: receiving the service configuration request; judging whether the service configuration path needs to be performed in response to the service configuration request pre-computation operation; in the case of judging that the pre-computation operation of the service configuration path is unnecessary, determine the default path according to the preset default conditions, and send the default path to the SDN network device; according to the received service configuration Determining the service configuration path according to the path determination condition carried in the request includes: determining the service configuration path according to the path determination condition carried in the received service configuration request when it is judged that the precomputation operation of the service configuration path is required.

Further, the judging in response to the service configuration request whether to perform the precomputation operation of the service configuration path includes: judging whether the service configuration request carries the path determination condition; the service configuration request carrying the path determination condition In this case, it is determined that the precomputation operation of the service configuration path needs to be performed; when the service configuration request does not carry the path determination condition, it is determined that the precomputation operation of the service configuration path is not required.

Further, determining a target path from the service configuration path includes: obtaining all available service paths when the path determination condition is the minimum cost value condition; determining a service with the least cost value from the all available service paths path as the target path; or in the case that the path determination condition is the minimum hop condition, obtain all available service paths; determine a service path with the smallest hop value from all available service paths as the target path; or If the path determination condition is the minimum delay value condition, all available service paths are obtained; and a service path with the smallest delay value is determined from all available service paths as the target path.

Further, the path determination condition includes: a path determination comprehensive condition composed of at least two path determination conditions, wherein the path determination condition is respectively determined according to one of the cost value, the hop value and the delay value.

Further, determining a target path from the service configuration path includes: obtaining multiple available service paths when the path determination comprehensive condition includes the first path determination condition and the second path determination condition; judging the multiple available service paths Whether there is a first target path that satisfies the first path determination condition in the service path; if it is determined that the first target path exists, determine whether there is a second target path that meets the second path determination condition in the first target path. target path; if it is judged that the second target path exists, determine the second target path as the target path; or determine the comprehensive condition of the path including the first path determination condition, the second path determination condition and the third path In the case of determining the composition of the conditions, obtain multiple available service paths; judge whether there is a third target path satisfying the first path determination condition in the multiple available service paths; if it is determined that the third target path exists, determine Whether there is a fourth target path that satisfies the second path determination condition in the third target path; if it is determined that the fourth target path exists, determine whether there is a fourth target path that meets the third path determination condition the fifth target path; if it is determined that the fifth target path exists, determine the fifth target path as the target path.

Further, after obtaining the multiple available service paths, the method further includes: in the case that none of the multiple available service paths satisfy the path determination comprehensive condition, repeatedly perform the following operations until the multiple available service paths are determined Determining the target path, wherein, the initial value of the current path determination comprehensive condition is the path determination comprehensive condition: delete the path determination condition with the lowest priority from the current path determination comprehensive condition, and obtain the changed path determination comprehensive condition; Judging whether there is the target path that satisfies the determined comprehensive condition of the changed path among the multiple available service paths; The comprehensive route determination condition of is used as the current route determination comprehensive condition.

According to another aspect of the present invention, a service configuration request method is provided, including: sending a service configuration request carrying path determination conditions to a software-defined network SDN controller, wherein the service configuration request is used to instruct the SDN controller to follow the The path determination condition determines the service configuration path, and the target path in the service configuration path is used to perform service configuration on the SDN network device that receives the service configuration path.

Further, after sending the service configuration request carrying path determination conditions to the SDN controller, the method further includes: sending a path selection instruction, wherein the path selection instruction is used to indicate that the target path is selected.

According to another aspect of the present invention, a service configuration device is provided, including: a determining module, configured to determine a service configuration path according to path determination conditions carried in a received service configuration request, wherein the service configuration request is sent by the service layer a sending module, configured to send the target path in the service configuration path to the software-defined network SDN network device, wherein the target path is used to perform service configuration on the SDN network device.

According to another aspect of the present invention, a service configuration request device is provided, including: a sending module, configured to send a service configuration request carrying path determination conditions to a software-defined network SDN controller, wherein the service configuration request is used to indicate the The SDN controller determines the service configuration path according to the path determination condition, and the target path in the service configuration path is used to perform service configuration on the SDN network device that receives the service configuration path.

According to another aspect of the present invention, a network management system is provided, including a service layer, a software-defined network SDN controller, and an SDN network device: the SDN controller determines the service configuration according to the path determination condition carried in the received service configuration request path, wherein the service configuration request is sent by the service layer; the SDN controller sends the target path in the service configuration path to the software-defined network SDN network device, wherein the target path is used to perform services on the SDN network device configuration.

Through the present invention, the technical solution of determining the service configuration path of SDN network equipment for service configuration according to the path determination conditions carried in the allocation service request is adopted, which solves the problem of low degree of freedom and insufficient difference in service deployment in related technologies, and increases service deployment The difference optimizes user service configuration experience.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of an SDN network organization structure of a related technology;

Fig. 2 is a flowchart of a service configuration method according to an embodiment of the present invention;

Fig. 3 is a structural block diagram of a service configuration device according to an embodiment of the present invention;

Fig. 4 is a structural block diagram of a network management system according to an embodiment of the present invention;

Fig. 5 is a flowchart of a service configuration method according to a preferred embodiment of the present invention;

Fig. 6 is a schematic diagram of a service configuration method according to a preferred embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In this embodiment, a network management system, service configuration, and service configuration request method and device are provided. FIG. 2 is a flowchart of a service configuration method according to an embodiment of the present invention. As shown in FIG. 2 , the process includes the following steps :

Step S202, determine the service configuration path according to the path determination condition carried in the received service configuration request, wherein the service configuration request is sent by the service layer;

Step S204, sending the target path in the service configuration path to the software-defined network SDN network device, wherein the target path is used to perform service configuration on the SDN network device.

The execution subject of the above service configuration method may be an SDN controller. The above service layer can manage APP for the SDN controller. The above service layer sends a service configuration request to the SDN controller through its own southbound interface, that is, the northbound interface of the SDN controller.

Optionally, the above sending the target path in the service configuration path to the software-defined network SDN network device may be to determine one of the target paths from the multiple paths included in the service configuration path, and send the target path to the SDN Network equipment. .

Optionally, determining a target path from the service configuration path may be receiving a path selection instruction, wherein the path selection instruction is used to indicate that the target path is selected; selecting the target path from the service configuration path in response to the path selection instruction path. The path selection instruction is issued by the service layer, and the user feeds it back to the user according to the received multiple paths fed back by the SDN, records the user selection result and carries the selection result in the above path selection instruction, and sends it to the SDN controller.

Preferably, determining the service configuration path according to the path determination condition carried in the received service configuration request includes: judging whether a multi-segment pseudowire MSPW service is configured; Determining the PW path of each pseudowire and the TE tunnel path corresponding to the PW path, wherein the service configuration path includes: the PW path and the TE tunnel path; determining a target PW path from the PW path, and from the A target TE tunnel path is determined among the TE tunnel paths corresponding to the target PW path, wherein the target PW path and the target TE tunnel path are used as the target path in the service configuration path.

Optionally, determining a target PW path from the PW paths includes: determining a target PW path from the PW paths according to the order of the switching points when the switching point of the MSPW service is configured. Preferably, after determining the head node and the tail node, if there is more than one switching point, the order of the switching points may not be specified, and the SDN controller can calculate all possible sequences by itself, such as the head node being A and the tail node B , where EH is the switching point, then there are two optional PW paths: A-E-H-B and A-H-E-B.

Preferably, the sequence of the switching point is determined by the following steps: judging whether the switching point sequence information issued by the business layer is received; if the judgment result is yes, determining the sequence indicated by the switching point sequence information as the The order of exchange points; if the judgment result is negative, determine the order of exchange points according to the shortest path condition.

Optionally, before determining the service configuration path according to the path determination condition carried in the received service configuration request, the method further includes: receiving the service configuration request; judging whether the service configuration needs to be performed in response to the service configuration request Configure the pre-computation operation of the path; when it is judged that the pre-calculation operation of the service configuration path is not required, determine the default path according to the preset default conditions, and send the default path to the SDN network device; according to the received Determining the service configuration path according to the path determination condition carried in the service configuration request includes: determining the service configuration path according to the path determination condition carried in the received service configuration request when it is judged that the precomputation operation of the service configuration path is required.

Preferably, the judging in response to the service configuration request whether to perform the precomputation operation of the service configuration path includes: judging whether the service configuration request carries the path determination condition; the service configuration request carries the path determination condition In the case of , it is determined that the precomputation operation of the service configuration path needs to be performed; in the case that the service configuration request does not carry the path determination condition, it is determined that the precomputation operation of the service configuration path is not required.

Optionally, the path determination condition may be a minimum cost value condition, a minimum hop count condition, or a minimum delay value condition. Determining a target path from the service configuration path includes: obtaining all available service paths when the condition for determining the path is the minimum cost value condition; determining a service path with the smallest cost value from all available service paths as the The target path; or in the case where the path determination condition is the minimum hop condition, obtain all available service paths; determine a service path with the smallest hop value from the all available service paths as the target path; or determine in the path When the condition is the minimum delay value condition, all available service paths are obtained; and a service path with the smallest delay value is determined from all available service paths as the target path.

Further, the path determination condition includes: a path determination comprehensive condition composed of at least two path determination conditions, wherein the path determination condition is respectively determined according to one of the cost value, the hop value and the delay value.

Further, determining a target path from the service configuration path includes: obtaining multiple available service paths when the path determination comprehensive condition includes the first path determination condition and the second path determination condition; judging the multiple available service paths Whether there is a first target path that satisfies the first path determination condition in the service path; if it is determined that the first target path exists, determine whether there is a second target path that meets the second path determination condition in the first target path. target path; if it is judged that the second target path exists, determine the second target path as the target path; or determine the comprehensive condition of the path including the first path determination condition, the second path determination condition and the third path In the case of determining the composition of the conditions, obtain multiple available service paths; judge whether there is a third target path satisfying the first path determination condition in the multiple available service paths; if it is determined that the third target path exists, determine Whether there is a fourth target path that satisfies the second path determination condition in the third target path; if it is determined that the fourth target path exists, determine whether there is a fourth target path that meets the third path determination condition the fifth target path; if it is determined that the fifth target path exists, determine the fifth target path as the target path.

Further, after obtaining the multiple available service paths, the method further includes: in the case that none of the multiple available service paths satisfy the path determination comprehensive condition, repeatedly perform the following operations until the multiple available service paths are determined Determining the target path, wherein, the initial value of the current path determination comprehensive condition is the path determination comprehensive condition: delete the path determination condition with the lowest priority from the current path determination comprehensive condition, and obtain the changed path determination comprehensive condition; Judging whether there is the target path that satisfies the determined comprehensive condition of the changed path among the multiple available service paths; The comprehensive route determination condition of is used as the current route determination comprehensive condition.

According to a service configuration request method according to another embodiment of the present invention, the service configuration request method includes the following steps: sending a service configuration request carrying path determination conditions to a software-defined network SDN controller, wherein the service configuration request is used to indicate that the SDN control The device determines the service configuration path according to the path determination condition, and the target path in the service configuration path is used to perform service configuration on the SDN network device that receives the service configuration path.

Further, after sending the service configuration request carrying path determination conditions to the SDN controller, the method further includes: sending a path selection instruction, wherein the path selection instruction is used to indicate that the target path is selected.

Fig. 3 is a structural block diagram of a service configuration device according to an embodiment of the present invention. As shown in Fig. 3, the device includes:

A determining module 32, configured to determine a service configuration path according to path determination conditions carried in the received service configuration request, wherein the service configuration request is sent by the service layer;

The sending module 34 is configured to send the target path in the service configuration path to the software-defined network SDN network device, wherein the target path is used to perform service configuration on the SDN network device.

According to a service configuration request device according to another embodiment of the present invention, the service configuration request device includes: a sending module, configured to send a service configuration request carrying path determination conditions to a software-defined network SDN controller, wherein the service configuration request is used to indicate The SDN controller determines a service configuration path according to the path determination condition, and a target path in the service configuration path is used to perform service configuration on the SDN network device that receives the service configuration path.

Fig. 4 is a structural block diagram of a network management system according to an embodiment of the present invention. As shown in Fig. 4, the network management system includes a service layer 42, a software-defined network SDN controller 44 and an SDN network device 46: The path determination condition carried in the received service configuration request determines the service configuration path, wherein the service configuration request is sent by the service layer; the SDN controller sends the service configuration path to the SDN network device, wherein the service configuration path is used for The SDN network device performs service configuration.

The present invention will be further described below in conjunction with specific examples.

Before deploying end-to-end services to the SDN controller, users can perform path precomputation for the services to be configured. When the SDN controller receives a service configuration request, it will judge whether precomputation is required, and if necessary, calculate all possible service paths, and recommend the best path that meets the conditions to the user according to the best path conditions specified by the user. And other available paths, if they are optimal under other conditions, will also be identified. Users can use the recommended path by default, or choose to use other available business paths as the final path for business deployment. The pre-calculation function is an optional function, and the optimal path conditions can be customized, which greatly increases the flexibility of quick service provisioning and the differences in different application scenarios under the SDN organizational structure. The so-called pre-calculation means that the SDN controller system calculates the service configuration path according to the path determination conditions.

Therefore, the present invention provides an SDN-based method and system for realizing service path precomputation. This system adds the service path pre-calculation function without changing the original process of rapidly deploying SDN services. In the MSPW scenario, not only the tunnel path can be pre-calculated, but also the switching point sequence, that is, the optional path of the PW, can be pre-calculated. The SDN controller returns all available service paths, and recommends the best path that meets the conditions to the user according to the conditions defined by the user. Users can use the best path recommended by the SDN controller by default, or choose to use other optional service paths as the final path for service deployment. The method and system greatly increase the flexibility of deploying SDN end-to-end services, but do not increase the burden on users.

A system for realizing service path precomputing based on SDN described in the present invention includes as follows:

SDN network: Compared with the traditional network, the switch or router based on the SDN network only has the logic of the forwarding plane (data plane), mainly based on the logic of the controller to complete the forwarding, through the Netconf protocol, simple network management SNMP protocol or remote login The Telnet protocol implements intercommunication with the collaborative SDN controller described in this method, as shown in FIG. 2 .

SDN controller system: SDN controller communicates with SDN network devices through Netconf protocol, simple network management SNMP protocol or remote login Telnet protocol. Users manage APP or other service configuration systems through the SDN controller and configure end-to-end services. The SDN controller is responsible for receiving service configuration information and using the path calculation unit PCE to calculate the service tunnel path. In the MSPW scenario, it is also necessary to calculate the PW path . According to certain conditions, identify the path determination conditions that meet the conditions, that is, the self-defined best path (hereinafter referred to as the best path), and return to the SDN controller management APP together with all other available paths for the user to choose. The SDN controller will deliver the path selected by the user as the final path to the SDN network device. The SDN controller includes a service deployment module and a precomputation module.

The business layer can manage the APP for the SDN controller: based on WEB implementation, it provides a user configuration interface, and calls the northbound interface provided by the SDN controller through the application layer protocol (such as the REST interface for expressive state transfer, etc.) to deliver the business configured by the user information, receive and present the path pre-calculated by the SDN controller for the user to choose, and record the final configuration result of the service. The above service layer also includes other service configuration systems, which have the function of service configuration and use the northbound interface provided by the SDN controller to configure services.

The SDN controller system of the present invention receives the service configuration request of the SDN controller management APP, and pre-calculates the service path according to the service configuration request, and the required service configuration information can also be provided by other service configuration systems. The system has the function of inputting and configuring business parameters, so this subsystem is optional.

A method for realizing service path precomputing based on SDN described in the present invention includes as follows:

Step 1: The business configuration module receives the user configuration business request and analyzes whether pre-computation is required;

The user manages the APP or other service configuration systems through the SDN controller, configures service information, enters and selects service access point information and necessary service parameters, and if it is an MSPW scenario, also needs to select service switching point information. Users can freely choose whether to perform precomputation. The conditions that the user wants the SDN controller to recommend the best path can be specified by the user and sent to the SDN controller through a service configuration request. On the premise of prioritizing service bandwidth and other service configuration parameters, it can also include but not limited to the following conditions:

(1) Recommend the tunnel path with the smallest cost (cost) value as the best path

(2) Recommend the tunnel path with the smallest metric (hop count) value as the best path

(3) Recommend the tunnel path with the smallest delay value as the best path

(4) Consider cost, metric, and delay as comprehensive conditions, and consider the tunnel path that meets the customized combination conditions as the best path.

The service configuration module of the SDN controller receives the service configuration request, analyzes whether precomputation is required according to whether it carries the best path condition, and sends the service configuration request to the service path precomputation module if necessary.

Step 2: For services that need to be pre-calculated, the pre-calculation module performs tunnel path pre-calculation based on the service information configured in the first step. If it is an MSPW scenario, it also needs to calculate the available path of the PW, and according to the conditions specified by the user The best path that meets the conditions is identified and returned to the management system APP for the user to choose.

The service path pre-calculation module receives the pre-computation instruction, and judges whether the service requiring pre-computation is an MSPW service. If it is an MSPW service, exhaustively calculate all available paths of PWs by combining the head node, tail node, and switching point in various combinations, and then calculate the available tunnel paths corresponding to each group of available PWs. For all available PW paths, the optimal PW path will be found according to the head and tail access point information input by the user, as well as the switching point of the MSPW, and the shortest physical link path from the head node through the switching point to the tail node. When calculating the tunnel path available for each PW, the PCE calculates the best tunnel path and marks it as the recommended path according to but not limited to the following methods:

(1) Recommend the best path according to the minimum tunnel path cost (cost) value

(2) Recommend the best path according to the minimum tunnel path metric (hop count) value

(3) Recommend the best path according to the minimum tunnel path delay (delay)

(4) Consider cost, metric, and delay as comprehensive conditions, and consider the tunnel path that meets the customized combination conditions as the best path.

If it is not an MSPW service, the PCE directly calculates all available paths of the tunnel, and identifies the best recommended path according to the conditions in step 2. The pre-calculation module returns the pre-calculation results to the SDN controller management APP for users to choose.

Step 3: The service deployment module receives the path selected by the user as the final path and deploys it to the SDN network device, and returns the final deployment result to the management system APP for recording and presentation.

The service deployment module receives the service path selected by the user, sends it to the SDN network device as the final path, uses the path calculation unit communication protocol PCEP to configure the tunnel path, and uses netconf to configure other service information, and the final The result of service deployment is returned to the network management system APP for recording and presentation.

Compared with the prior art, the present invention provides an SDN-based method and system for realizing service path precomputation. Under the principle of not affecting the rapid deployment of SDN services, users can freely choose whether to perform service path precomputation. If precomputation is required, the SDN controller will automatically calculate all available tunnel paths and identify the best path to recommend to the user. In the MSPW scenario, if there are multiple switching points (switching points are greater than or equal to 2), all available PW paths will be calculated for the user to choose, and the recommended best path will be identified. The whole process has no impact on the original rapid service deployment process, but it reduces the risk of readjustment of service paths that do not meet user needs after service deployment, and improves the flexibility of service configuration to meet the needs of different users. To sum up, the embodiment of the present invention provides a method and system for realizing service path precomputation based on SDN, which is used to improve the degree of freedom and diversity of rapid deployment of SDN services, and reduce service paths that fail to meet expectations after service deployment, and then Then adjust the risk of modifying the business.

Fig. 5 is the flowchart of the service preparation method of the preferred embodiment of the present invention, as shown in Fig. 5, comprises the following steps:

Step S502, the user selects the service access point and switching point information to configure the MSPW service;

Step S504, after receiving the configuration service instruction (that is, the configuration service request mentioned above), it is judged whether precomputation is required, and if the judgment result is yes, step S506 is executed, and if the judgment result is no , skip to step S510;

Step S506, calculate all available PW paths (that is, the pseudowire configuration paths mentioned above) and tunnel paths (that is, the tunnel configuration paths mentioned above), and identify the recommended path according to the optimal conditions specified by the user to return Go to the service configuration interface for users to choose;

Step S508, deploying the path selected by the user as the final path to the SDN network device, and returning the deployment result;

Step S510, calculating an available path and directly deploying it to the SDN network device, and returning the deployment result;

Step S512, record and present the service deployment result.

The method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

FIG. 6 is a schematic diagram of a service configuration method in a preferred embodiment of the present invention. In the figure, there may be multiple identical devices between every two interconnected SDN network devices. Here is a simplified example diagram. The method of the present invention is applied to this embodiment, and the MSPW service is created from the access point A to the access point D, the primary switching point is B C, and the standby switching point is E F. As shown in Figure 6, it includes the following steps:

Step 10: The user manages the APP or other service configuration systems through the SDN controller, creates MSPW services, selects service access points A and D, sets the main switching points as B and C, and the backup switching points as E and F.

Step 20: The service configuration module receives the command to configure the service, checks the received parameters, and if the parameters are legal, then checks whether pre-computation of the service path is required, and if necessary, sends the command to the pre-calculation module, that is, to step 30, If not, send the command directly to the service deployment module, that is, go to step 50. In this embodiment, a pre-calculation method is adopted, and the best path recommendation criterion specified by the user is that the cost value is the smallest, and the delay cannot be greater than 50 ms.

Step 30: If the pre-calculation module recognizes that the service is an MSPW service, it needs to calculate the available paths and service tunnel paths of all PWs. Among them, the available paths of the active PW are A-B-C-D and A-C-B-D; the available paths of the standby PW are A-E-F-D and A-F-E-D. Starting from the first service access point A to the last service access point D, according to the shortest path algorithm, the main A-B-C-D and the backup A-E-F-D is recommended as the best PW path. In addition, each PW path has its corresponding available TE tunnel path. Among them, the TE tunnel paths available for the main PW path of A-B-C-D include: A-B-C-D, A-E-B-C-D, A-E-B-E-F-C-D, A-B-E-F-C-D, etc. Similarly, the TE tunnels available for the backup PW path of A-E-F-D The paths are A-E-F-D, A-E-F-C-D, A-E-B-C-F-D, etc. In fact, there may be multiple SDN network device nodes between A-B-C-D and A-E-F-D, and PW paths and TE tunnel paths are generally different, and this embodiment is a simplified diagram. Among all the calculated tunnel paths, according to the cost value of the path from small to large, check one by one to judge whether the delay of each path meets the requirement of no more than 50ms. The optimal path recommended in the end should be that the cost value of the tunnel path is the smallest and A path that satisfies the condition that the delay is not greater than 50ms. The pre-calculation module identifies the optimal PW and tunnel path and returns to the service configuration interface for the user to choose. The recommended optimal path is selected by default on the service configuration interface. You can view and compare other path information, and choose to deliver it to the SDN controller.

In the case that any tunnel path does not meet the condition that the cost value is minimum and not greater than 50ms, determine that the minimum cost value is higher than the priority not greater than 50ms, and select the tunnel path for configuring the SDN network device according to the minimum cost value condition.

Step 40: The service deployment module receives the final path selected by the user, deploys the tunnel path to the SDN device through PCEP, and deploys other related configurations to the SDN device using netconf.

Step 50: The service deployment module calculates an available path and directly deploys it to the SDN network device, and returns the deployment result

Step 60: The service deployment module feeds back the final deployment result to the service configuration system, and the service configuration system records and presents the result of the service deployment. for easy viewing by the user.

To sum up, the present invention provides an SDN-based method and system for realizing service path precomputation. Without changing the original process of rapidly deploying SDN services, the service path pre-calculation function is added. In the MSPW scenario, not only the tunnel path can be pre-calculated, but also the switching point sequence, that is, the optional path of the PW, can be pre-calculated. The SDN controller returns all available service paths, and recommends the best path for the user to choose according to the best path criteria specified by the user. Users can use the best path recommended by the SDN controller by default, or choose to use other optional service paths as the final path for service deployment. The method and system greatly improve the degree of freedom and difference of SDN service deployment, reduce the risk of service path not meeting expectations after service deployment, and then adjust and modify the service to improve user experience.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Alternatively, they may be implemented in program code executable by a computing device so that they may be stored in a storage device to be executed by a computing device, and in some cases in an order different from that shown here The steps shown or described are carried out, or they are separately fabricated into individual integrated circuit modules, or multiple modules or steps among them are fabricated into a single integrated circuit module for implementation. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (17)

1. A service configuration method, characterized in that, comprising: Determine the service configuration path according to the path determination condition carried in the received service configuration request, where the service configuration request is sent by the service layer; Sending a target path in the service configuration path to a software-defined network SDN network device, where the target path is used to perform service configuration on the SDN network device. 2. The method according to claim 1, wherein the sending the target path in the service configuration path to the SDN network device comprises: determining one of the target paths from the service configuration paths, wherein the service configuration paths include multiple paths; Send the target path to the SDN network device. 3. The method according to claim 2, wherein determining a target path from the service configuration path comprises: receiving a path selection instruction, wherein the path selection instruction is used to indicate that the target path is selected; Selecting the target path from the service configuration paths in response to the path selection instruction. 4. The method according to claim 1, wherein said determining the service configuration path according to the path determination condition carried in the received service configuration request comprises: Determine whether the multi-segment pseudowire MSPW service is configured; When it is determined that the MSPW service is configured, determine the PW path of each pseudowire PW and the TE tunnel path corresponding to the PW path according to the path determination condition, wherein the service configuration path includes: The PW path and the TE tunnel path; Determine a target PW path from the PW path, and determine a target TE tunnel path from the TE tunnel paths corresponding to the target PW path, where the target PW path and the target TE tunnel path are used as the The target path in the service configuration path. 5. The method according to claim 4, wherein the determining a target PW path from the PW paths comprises: When the switching point of the MSPW service is configured, a target PW path is determined from the PW paths according to the order of the switching points. 6. The method according to claim 5, wherein the order of the exchange points is determined by the following steps: judging whether the switching point sequence information issued by the service layer is received; If the judgment result is yes, determining the sequence indicated by the switching point sequence information as the switching point sequence; In the case where the judgment result is negative, the order of switching points is determined according to the shortest path condition. 7. The method according to any one of claims 1-6, characterized in that, Before determining the service configuration path according to the path determination condition carried in the received service configuration request, the method further includes: receiving the service configuration request; and judging whether it needs to be performed in response to the service configuration request Precomputation operation of the service configuration path; when it is determined that the precomputation operation of the service configuration path is not required, determine a default path according to preset default conditions, and send the default path to the SDN network device ; Determining the service configuration path according to the path determination condition carried in the received service configuration request includes: determining the path according to the path determination condition carried in the received service configuration request when it is judged that the precomputation operation of the service configuration path is required Determine the business configuration path. 8. The method according to claim 7, wherein the judging in response to the service configuration request whether the precomputation of the service configuration path needs to be performed comprises: judging whether the path determination condition is carried in the service configuration request; If the service configuration request carries the path determination condition, it is determined that the precomputation operation of the service configuration path needs to be performed; If the service configuration request does not carry the path determination condition, it is determined that the precomputation operation of the service configuration path does not need to be performed. 9. The method according to claim 2, wherein said determining one of said target paths from said service configuration paths comprises: If the path determination condition is a minimum cost value condition, obtain all available service paths; determine a service path with the smallest cost value from all available service paths as the target path; or In the case where the path determination condition is a minimum hop count condition, obtain all available service paths; determine a service path with the smallest hop value from all available service paths as the target path; or If the path determination condition is a minimum delay value condition, all available service paths are acquired; and a service path with the smallest delay value is determined from all available service paths as the target path. 10. The method according to claim 2, wherein the path determination conditions include: A comprehensive path determination condition consisting of at least two path determination conditions, wherein the path determination conditions are respectively determined according to one of a cost value, a hop value, and a delay value. 11. The method according to claim 10, wherein said determining one of said target paths from said service configuration paths comprises: In the case where the path determination comprehensive condition includes a first path determination condition and a second path determination condition, acquiring multiple available service paths; judging whether any of the multiple available service paths satisfies the first path determination condition first target path; if it is determined that the first target path exists, determine whether there is a second target path that satisfies the second path determination condition in the first target path; if it is determined that the first target path exists In the case of two target paths, determining that the second target path is the target path; or In the case where the path determination comprehensive condition includes the first path determination condition, the second path determination condition and the third path determination condition, obtain multiple available service paths; determine whether the multiple available service paths satisfy the The third target path of the first path determination condition; when it is determined that the third target path exists, determine whether there is a fourth target path that satisfies the second path determination condition in the third target path; When it is determined that the fourth target path exists, determine whether there is a fifth target path that satisfies the third path determination condition in the fourth target path; if it is determined that the fifth target path exists , determining the fifth target path as the target path. 12. The method according to claim 11, characterized in that, after acquiring the multiple available service paths, the method further comprises: In the case that none of the multiple available service paths satisfies the path determination comprehensive condition, repeat the following operations until the target path is determined from the multiple available service paths, wherein the current path determination comprehensive condition The initial value of is to determine the synthesis condition for the path: Deleting the route determination condition with the lowest priority from the current route determination comprehensive condition to obtain the modified route determination comprehensive condition; judging whether there is the target path that satisfies the comprehensive condition for determining the modified path among the plurality of available service paths; If it is determined that there is no target route that satisfies the modified comprehensive route determination condition, the modified route determination comprehensive condition is used as the current route determination comprehensive condition. 13. A service configuration request method, characterized in that, comprising: Sending a service configuration request carrying path determination conditions to a software-defined network SDN controller, wherein the service configuration request is used to instruct the SDN controller to determine a service configuration path according to the path determination conditions, and the service configuration path The target path is used to perform service configuration on the SDN network device that receives the service configuration path. 14. The method according to claim 13, characterized in that, after sending the service configuration request carrying path determination conditions to the SDN controller, the method further comprises: Sending a path selection instruction, wherein the path selection instruction is used to indicate that the target path is selected. 15. A service configuration device, characterized in that it comprises: A determining module, configured to determine a service configuration path according to path determination conditions carried in a received service configuration request, wherein the service configuration request is sent by a service layer; A sending module, configured to send a target path in the service configuration path to a software-defined network SDN network device, wherein the target path is used to perform service configuration on the SDN network device. 16. A service configuration request device, characterized in that it comprises: A sending module, configured to send a service configuration request carrying path determination conditions to a software-defined network SDN controller, wherein the service configuration request is used to instruct the SDN controller to determine a service configuration path according to the path determination conditions, the The target path in the service configuration path is used to perform service configuration on the SDN network device that receives the service configuration path. 17. A network management system, comprising a service layer, a software-defined network SDN controller and an SDN network device, characterized in that: The SDN controller determines the service configuration path according to the path determination condition carried in the received service configuration request, wherein the service configuration request is sent by the service layer; The SDN controller sends a target path in the service configuration path to a software-defined network SDN network device, where the target path is used to perform service configuration on the SDN network device.