CN107872338B - Network management system, service configuration method, service configuration request method and device - Google Patents
Network management system, service configuration method, service configuration request method and device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention provides a network management system, a service configuration method, a service configuration request method and a device, wherein the service configuration method comprises the following steps: determining a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer; and sending a target path in the service configuration paths to Software Defined Network (SDN) network equipment, wherein the target path is used for carrying out service configuration on the SDN network equipment. The invention solves the problems of low degree of freedom and insufficient difference of service deployment in the related technologies, and improves the difference of service deployment to optimize the user service configuration experience.
Description
Technical Field
The present invention relates to the field of data network communication, and in particular, to a network management system, a service configuration method, a service configuration request method, and a service configuration request device.
Background
After a Software Defined Network (SDN) appears, an end-to-end service is quickly deployed to be an important characteristic of the SDN, and the scatter and the complexity of using a traditional Network Management System (NMS) to deploy services are solved. For the commonly used L2VPN service and L3VPN service in the two-layer VPN and the three-layer VPN, a user generally needs to specify a service access point and issue a small number of necessary parameters to the SDN controller, so that a service can be automatically opened. The SDN controller may automatically create an end-to-end multi-protocol label switching (MPLS) Traffic Engineering (TE) dynamic or static tunnel while configuring a VPN service, where a path of the tunnel is automatically calculated by the controller and automatically deployed to an SDN network device, as shown in fig. 1. In general, the controller will default to calculating an optimal path according to the shortest path algorithm. However, in a complex network, there may be multiple options for the tunnel path, especially in a scenario of configuring the MSPW service, if a user specifies multiple service switching points, the problem of switching point order is also involved, in this case, once the service configuration is completed, the user checks the switching point order or the service path cannot meet the requirement, and readjusts the configuration. In the related art, the controller automatically calculates the path without giving a user a choice, which greatly weakens the advantages embodied under the SDN organization architecture and influences the user experience.
Aiming at the problem of low degree of freedom and insufficient difference of service deployment in the related technology, the prior art does not provide an effective solution.
Disclosure of Invention
The invention aims to provide a network management system, a service configuration method, a service configuration request method and a service configuration request device, and solves the problem of low degree of freedom and insufficient difference of service deployment in the related technology.
According to an aspect of the present invention, there is provided a service configuration method, including: determining a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer; and sending a target path in the service configuration paths to Software Defined Network (SDN) network equipment, wherein the target path is used for carrying out service configuration on the SDN network equipment.
Further, the sending the target path in the service configuration path to the SDN network device includes: determining the target path from the service configuration paths, wherein the service configuration paths comprise a plurality of paths; and sending the target path to the SDN network device.
Further, determining the target path from the service configuration paths comprises: receiving a path selection instruction, wherein the path selection instruction is used for indicating that the target path is selected; and responding to the path selection instruction to select the target path from the service configuration paths.
Further, the determining the service configuration path according to the path determination condition carried in the received service configuration request includes: judging whether multi-segment pseudo wire MSPW service is configured or not; under the condition that the MSPW service is judged to be configured, determining a PW path of each pseudo wire PW and a TE tunnel path corresponding to the PW path according to the path determination condition, wherein the service configuration path comprises: the PW path and the TE tunnel path; and determining a target PW path from the PW paths, and determining a target TE tunnel path from 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: and under the condition that the switching point of the MSPW service is configured, determining a target PW path from the PW paths according to the sequence of the switching point.
Further, the order of the switching points is determined by: judging whether switching point sequence information sent by the service layer is received; if the judgment result is yes, determining the sequence indicated by the exchange point sequence information as the sequence of the exchange point; and under the condition that the judgment result is negative, determining the sequence of the switching points 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; responding to the service configuration request to judge whether the pre-calculation operation of the service configuration path is needed; determining a default path according to a preset default condition and sending the default path to SDN network equipment under the condition that the pre-calculation operation of the service configuration path is judged not to be needed; determining the service configuration path according to the path determination condition carried in the received service configuration request includes: and under the condition that the pre-calculation operation of the service configuration path is judged to be needed, determining the service configuration path according to the path determination condition carried in the received service configuration request.
Further, the determining whether the pre-calculation operation of the service configuration path is required in response to the service configuration request includes: judging whether the service configuration request carries the path determining condition; under the condition that the service configuration request carries the path determining condition, judging that the pre-calculation operation of the service configuration path needs to be carried out; and under the condition that the path determining condition is not carried in the service configuration request, judging that the pre-calculation operation of the service configuration path is not needed.
Further, the determining the target path from the service configuration paths comprises: under the condition that the path determining condition is the minimum cost value condition, all available service paths are obtained; determining a service path with the minimum cost value from all the available service paths as the target path; or under the condition that the path determining condition is the minimum hop count condition, all available service paths are obtained; determining a service path with the minimum hop number value from all the available service paths as the target path; or under the condition that the path determining condition is the minimum time delay value condition, all available service paths are obtained; and determining a service path with the minimum time delay value from all the available service paths as the target path.
Further, the path determination condition includes: a path determination comprehensive condition is composed of at least two path determination conditions, wherein the path determination conditions are respectively determined according to one of a cost value, a hop count value and a delay value.
Further, the determining the target path from the service configuration paths comprises: under the condition that the path determination comprehensive condition comprises a first path determination condition and a second path determination condition, acquiring a plurality of available service paths; judging whether a first target path meeting the first path determination condition exists in the plurality of available service paths; under the condition that the first target path is judged to exist, judging whether a second target path meeting the second path determining condition exists in the first target path; determining the second target path as the target path under the condition that the second target path is judged to exist; or under the condition that the path determination comprehensive condition comprises a first path determination condition, a second path determination condition and a third path determination condition, acquiring a plurality of available service paths; judging whether a third target path meeting the first path determination condition exists in the plurality of available service paths; under the condition that the third target path exists, judging whether a fourth target path meeting the second path determining condition exists in the third target path; under the condition that the fourth target path exists, judging whether a fifth target path meeting the third path determining condition exists in the fourth target path; and determining the fifth target path as the target path under the condition that the fifth target path is judged to exist.
Further, after obtaining the plurality of available service paths, the method further includes: under the condition that none of the plurality of available service paths does not meet the path determination comprehensive condition, repeatedly executing the following operations until the target path is determined from the plurality of available service paths, wherein the initial value of the current path determination comprehensive condition is the path determination comprehensive condition: deleting the path determination condition with the lowest priority from the current path determination comprehensive conditions to obtain the changed path determination comprehensive conditions; judging whether the target path meeting the changed path determination comprehensive condition exists in the plurality of available service paths or not; and under the condition that the target path meeting the modified path determination comprehensive condition does not exist, taking the modified path determination comprehensive condition as the current path 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 a path determination condition to a Software Defined Network (SDN) controller, wherein the service configuration request is used for indicating the SDN controller to determine a service configuration path according to the path determination condition, and a target path in the service configuration path is used for performing service configuration on SDN network equipment receiving the service configuration path.
Further, after sending the service configuration request carrying a path determination condition to the SDN controller, the method further includes: and sending a path selection instruction, wherein the path selection instruction is used for indicating that the target path is selected.
According to another aspect of the present invention, there is provided a service configuration apparatus, including: the determining module is used for determining a service configuration path according to a path determining condition 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 Software Defined Network (SDN) network equipment, where the target path is used to perform service configuration on the SDN network equipment.
According to another aspect of the present invention, there is provided a service configuration requesting apparatus, including: a sending module, configured to send a service configuration request carrying a path determination condition to a software defined network SDN controller, where the service configuration request is used to instruct the SDN controller to determine 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 SDN network devices receiving the service configuration path.
According to another aspect of the present invention, there is provided a network management system, including a service layer, a software defined network SDN controller, and an SDN network device: the SDN controller determines a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer; and the SDN controller sends a target path in the service configuration paths to a Software Defined Network (SDN) network device, wherein the target path is used for carrying out service configuration on the SDN network device.
According to the invention, the technical scheme of determining the service configuration path for the SDN network equipment to perform service configuration according to the path determination condition carried in the funding service request is adopted, so that the problem of low degree of freedom and insufficient difference of service deployment in the related technology is solved, and the difference of service deployment is increased to optimize the user service configuration experience.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
figure 1 is a schematic diagram of a related art SDN network organization architecture;
FIG. 2 is a flow chart of a service configuration method according to an embodiment of the present invention;
fig. 3 is a block diagram of a service configuration apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of a network management system according to an embodiment of the present invention;
fig. 5 is a flow chart of a service provisioning 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 Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
In this embodiment, a network management system, a service configuration method, a service configuration request method, and an apparatus are provided, fig. 2 is a flowchart of a service configuration method according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:
step S202, determining a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer;
step S204, 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.
The executing body of the service configuration method may be an SDN controller. The service layer may manage APPs for SDN controllers. The service layer sends a service configuration request to the SDN controller through a southbound interface of the service layer, namely a northbound interface of the SDN controller.
Optionally, the sending of the target path in the service configuration path to the software defined network SDN network device may be configured to determine one target path from multiple paths included in the service configuration path, and send the target path to the SDN network device. .
Optionally, determining one target path from the service configuration paths may be a receive path selection instruction, where the path selection instruction is used to indicate that the target path is selected; and responding to the path selection instruction to select the target path from the service configuration paths. The path selection instruction is issued by the service layer, and the user feeds back the received multiple paths fed back by the SDN to the user, records the user selection result, carries the selection result in the path selection instruction, and issues the path selection instruction to the SDN controller.
Preferably, the determining the service configuration path according to the path determination condition carried in the received service configuration request includes: judging whether multi-segment pseudo wire MSPW service is configured or not; under the condition that the MSPW service is judged to be configured, determining a PW path of each pseudo wire and a TE tunnel path corresponding to the PW path according to the path determination condition, wherein the service configuration path comprises: the PW path and the TE tunnel path; and determining a target PW path from the PW paths, and determining a target TE tunnel path from 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, the determining a target PW path from the PW paths includes: and under the condition that the switching point of the MSPW service is configured, determining a target PW path from the PW paths according to the sequence of the switching point. Preferably, after the first node and the last node are determined, in the case that there is more than one switching point, the sequence of the switching points may not be specified, and the SDN controller may calculate all possible sequences by itself, where if the head node is an end node B and the EH is a switching point therein, two PW selectable paths, i.e., a-E-H-B and a-H-E-B, exist.
Preferably, the order of the switching points is determined by: judging whether switching point sequence information sent by the service layer is received; if the judgment result is yes, determining the sequence indicated by the exchange point sequence information as the sequence of the exchange point; and under the condition that the judgment result is negative, determining the sequence of the switching 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; responding to the service configuration request to judge whether the pre-calculation operation of the service configuration path is needed; determining a default path according to a preset default condition and sending the default path to SDN network equipment under the condition that the pre-calculation operation of the service configuration path is judged not to be needed; determining the service configuration path according to the path determination condition carried in the received service configuration request includes: and under the condition that the pre-calculation operation of the service configuration path is judged to be needed, determining the service configuration path according to the path determination condition carried in the received service configuration request.
Preferably, the determining whether the pre-calculation operation of the service configuration path needs to be performed in response to the service configuration request includes: judging whether the service configuration request carries the path determining condition; under the condition that the service configuration request carries the path determining condition, judging that the pre-calculation operation of the service configuration path needs to be carried out; and under the condition that the path determining condition is not carried in the service configuration request, judging that the pre-calculation operation of the service configuration path is not needed.
Alternatively, the path determination condition may be a minimum cost value condition, a minimum hop count condition, or a minimum delay value condition. The determining of the target path from the service configuration paths comprises: under the condition that the path determining condition is the minimum cost value condition, all available service paths are obtained; determining a service path with the minimum cost value from all the available service paths as the target path; or under the condition that the path determining condition is the minimum hop count condition, all available service paths are obtained; determining a service path with the minimum hop number value from all the available service paths as the target path; or under the condition that the path determining condition is the minimum time delay value condition, all available service paths are obtained; and determining a service path with the minimum time delay value from all the available service paths as the target path.
Further, the path determination condition includes: a path determination comprehensive condition is composed of at least two path determination conditions, wherein the path determination conditions are respectively determined according to one of a cost value, a hop count value and a delay value.
Further, the determining the target path from the service configuration paths comprises: under the condition that the path determination comprehensive condition comprises a first path determination condition and a second path determination condition, acquiring a plurality of available service paths; judging whether a first target path meeting the first path determination condition exists in the plurality of available service paths; under the condition that the first target path is judged to exist, judging whether a second target path meeting the second path determining condition exists in the first target path; determining the second target path as the target path under the condition that the second target path is judged to exist; or under the condition that the path determination comprehensive condition comprises a first path determination condition, a second path determination condition and a third path determination condition, acquiring a plurality of available service paths; judging whether a third target path meeting the first path determination condition exists in the plurality of available service paths; under the condition that the third target path exists, judging whether a fourth target path meeting the second path determining condition exists in the third target path; under the condition that the fourth target path exists, judging whether a fifth target path meeting the third path determining condition exists in the fourth target path; and determining the fifth target path as the target path under the condition that the fifth target path is judged to exist.
Further, after obtaining the plurality of available service paths, the method further includes: under the condition that none of the plurality of available service paths does not meet the path determination comprehensive condition, repeatedly executing the following operations until the target path is determined from the plurality of available service paths, wherein the initial value of the current path determination comprehensive condition is the path determination comprehensive condition: deleting the path determination condition with the lowest priority from the current path determination comprehensive conditions to obtain the changed path determination comprehensive conditions; judging whether the target path meeting the changed path determination comprehensive conditions exists in the plurality of available service paths; and under the condition that the target path meeting the changed path determination comprehensive condition does not exist, taking the changed path determination comprehensive condition as the current path determination comprehensive condition.
According to another embodiment of the present invention, a service configuration request method includes the following steps: sending a service configuration request carrying a path determination condition to a Software Defined Network (SDN) controller, wherein the service configuration request is used for indicating the SDN controller to determine a service configuration path according to the path determination condition, and a target path in the service configuration path is used for performing service configuration on SDN network equipment receiving the service configuration path.
Further, after sending the service configuration request carrying a path determination condition to the SDN controller, the method further includes: and sending a path selection instruction, wherein the path selection instruction is used for indicating that the target path is selected.
Fig. 3 is a block diagram of a service configuration apparatus according to an embodiment of the present invention, and as shown in fig. 3, the apparatus includes:
a determining module 32, configured to determine a service configuration path according to a path determining condition carried in a received service configuration request, where the service configuration request is sent by a service layer;
a sending module 34, configured to send a target path in the service configuration paths to a software defined network SDN network device, where the target path is used to perform service configuration on the SDN network device.
According to another embodiment of the present invention, a service configuration requesting apparatus includes: a sending module, configured to send a service configuration request carrying a path determination condition to a software defined network SDN controller, where the service configuration request is used to instruct the SDN controller to determine 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 SDN network devices receiving the service configuration path.
Fig. 4 is a block diagram of a network management system according to an embodiment of the present invention, and 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 SDN controller determines a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer; the SDN controller sends the service configuration path to an SDN network device, wherein the service configuration path is used for performing service configuration on the SDN network device.
The present invention is further illustrated by the following specific examples.
A user may perform path pre-computation on the service to be configured before deploying the end-to-end service to the SDN controller. The SDN controller receives a service configuration request, judges whether pre-calculation is needed or not, if yes, calculates all possible service paths, recommends the best paths meeting the conditions to the user according to the best path conditions specified by the user, identifies other available paths if the best paths are under other conditions, and the user can use the recommended paths by default or select other available service paths as final paths for service deployment by comparison. The precomputation function is used as an optional function, the optimal path condition can be customized, and the flexibility of rapidly opening the service and the difference under different application scenes under the SDN organization architecture are greatly improved. By pre-calculation, the SDN controller system calculates a service configuration path according to a path determination condition.
Therefore, the invention provides a method and a system for realizing service path pre-calculation based on an SDN. The system adds a service path pre-calculation function without changing the original flow of rapidly deploying the SDN service. In the MSPW scenario, not only the tunnel path but also the switching point sequence, that is, the optional path of the PW, can be pre-calculated. And the SDN controller returns all available service paths, and recommends the best path meeting the conditions to the user according to the conditions defined by the user. The user may default to the best path recommended by the SDN controller, or may 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 of user usage.
The invention discloses a system for realizing service path pre-calculation based on SDN, which comprises the following steps:
compared with the traditional network, the SDN-based switch or router only has the logic of a forwarding plane (data plane), mainly completes forwarding according to the logic of the controller, and realizes the intercommunication with the collaborative SDN controller of the method through a Netconf protocol, a simple network management SNMP protocol or a remote login Telnet protocol, as shown in figure 2.
An SDN controller system: the SDN controller is communicated with the SDN network equipment through a Netconf protocol, a simple network management SNMP protocol or a Telnet protocol. A user manages an APP or other service configuration systems through an SDN controller, an end-to-end service is configured, the SDN controller is responsible for receiving service configuration information and calculating a service tunnel path by using a path calculation unit PCE, and a PW path needs to be calculated in an MSPW scene. According to certain conditions, a path determination condition meeting the conditions, namely a self-defined optimal path (hereinafter referred to as an optimal path) is identified, and the optimal path and all other available paths are returned to the SDN controller to manage the APP for a user to select. The SDN controller issues the path selected by the user as a final path to the SDN network device. The SDN controller comprises a service deployment module and a pre-calculation module.
The service layer may manage APPs for the SDN controller: based on WEB implementation, a user configuration interface is provided, a northbound interface provided by an SDN controller is called through an application layer protocol (such as representational state transfer (REST) interface) to issue service information configured by the user, a path pre-calculated by the SDN controller is received and presented for the user to select, and a final configuration result of the service is recorded. The service layer also comprises other service configuration systems, and the other service configuration systems have the service configuration function and configure services by using a northbound interface provided by the SDN controller.
The SDN controller system receives the service configuration request of the APP managed by the SDN controller, and pre-calculates the service path according to the service configuration request, the required service configuration information can be provided by other service configuration systems, and the system has the function of service parameter input configuration, so that the subsystem is optional.
The invention discloses a method for realizing service path pre-calculation based on an SDN (software defined network), which comprises the following steps:
the first step is as follows: a service configuration module receives a user configuration service request and analyzes whether precomputation is needed or not;
a user manages an APP or other service configuration systems through an SDN controller, configures service information, inputs selected service access point information and necessary service parameters, and also needs to select service switching point information if the service switching point information is an MSPW scene. Whether pre-calculation is needed or not can be freely selected by a user. The conditions under which a user wishes an SDN controller to recommend the best path may be specified by the user and sent to the SDN controller via a service configuration request. On the premise of preferentially meeting the service bandwidth and other service configuration parameters, the following conditions can be included but not limited to:
(1) recommending the tunnel path with the minimum cost value as the best path
(2) Recommending the tunnel path with the minimum metric value as the best path
(3) Recommending the tunnel path with the minimum delay value as the optimal path
(4) The cost, the metric and the delay are taken as comprehensive conditions and considered uniformly, and the tunnel path meeting the customized combination condition is recommended as the optimal path
And a service configuration module of the SDN controller receives the service configuration request, analyzes whether pre-calculation is needed or not according to whether the optimal path condition is carried, and sends the service configuration request to a service path pre-calculation module if the pre-calculation is needed.
The second step is that: for the service needing to be precomputed, the precomputation module performs tunnel path precomputation on the service information configured in the first step, if the service information is an MSPW scene, the available path of the PW is also needed to be calculated, and according to the conditions specified by the user, the optimal path meeting the conditions is identified and returned to the management system APP for the user to select.
And the service path pre-calculation module receives the pre-calculation instruction and judges whether the service needs to be pre-calculated is the MSPW service. If the service is the MSPW service, all available paths of the PW are exhaustively calculated by the head node, the tail node and the switching point according to various permutation and combination modes, and then the available tunnel path corresponding to each group of available PW is calculated. For all available PW paths, the optimal PW path is found out according to the head-to-tail access point information input by a user and the switching point of the MSPW and according to the shortest condition of the physical link path from the head node to the tail node through the switching point. When calculating the tunnel path available for each PW, the PCE calculates the optimal tunnel path and identifies it as the recommended path according to, but not limited to, the following method:
(1) recommending optimal path according to minimum cost value of tunnel path
(2) Recommending optimal path according to minimum value of tunnel path metric (hop count)
(3) Recommending optimal path according to minimum delay of tunnel path
(4) Taking cost, metric and delay as comprehensive conditions, considering uniformly, recommending the tunnel path meeting the customized combination condition as the optimal path
If not, the PCE directly computes all available paths of the tunnel and identifies the best recommended path according to the conditions in step 2. And the pre-calculation module returns a pre-calculation result to the SDN controller management APP for selection by a user.
The third step: and the service deployment module receives the path selected by the user as a final path to be deployed to the SDN network equipment, and returns a final deployment result to the management system APP for recording and presenting.
The service deployment module receives a service path selected by a user, issues the service path as a final path to SDN network equipment, configures a tunnel path by using a path computing unit (PCEP) for configuration, configures other service information by using netconf, and returns a final service deployment result to a network management system (APP) for recording and presenting.
Compared with the prior art, the invention provides a method and a system for realizing service path pre-calculation based on SDN. Under the principle that the SDN rapid service deployment is not influenced, a user can freely select whether service path pre-calculation is needed or not. If pre-computation is required, the SDN controller will automatically compute all available tunnel paths and identify the best path to recommend to the user for selection. If the MSPW scene exists, if a plurality of switching points exist (the switching points are more than or equal to 2), all available PW paths are calculated for the user to select, and the recommended best path is identified. The whole process has no influence on the original process for rapidly deploying the service, but reduces the risk that the service path does not meet the requirements of users and needs to be readjusted after the service is deployed, improves the flexibility of service configuration, and meets the requirements of different users. To sum up, embodiments of the present invention provide a method and a system for implementing service path precomputation based on an SDN, so as to improve the degree of freedom and difference of rapid deployment of an SDN service, reduce a risk that a service path is unexpected after service deployment, and then adjust and modify a service.
Fig. 5 is a flowchart of a service provisioning method according to a preferred embodiment of the present invention, as shown in fig. 5, including the following steps:
step S502, a user selects a service access point and exchange point information to configure MSPW service;
step S504, receiving a service configuration instruction (i.e. the above-mentioned service configuration request), determining whether pre-calculation is required, if so, executing step S506, and if not, skipping to execute step S510;
step S506, calculating all available PW paths (i.e., the above-mentioned pseudowire configuration paths) and tunnel paths (i.e., the above-mentioned tunnel configuration paths), and according to the optimal conditions specified by the user, identifying recommended paths to return to the service configuration interface for the user to select;
step S508, the path selected by the user is used as a final path to be deployed to SDN network equipment, and a deployment result is returned;
step S510, calculating an available path, directly deploying the available path to SDN network equipment, and returning a deployment result;
and step S512, recording and presenting the service deployment result.
The method of the present invention is further described in detail below with reference to the drawings and the specific examples.
Fig. 6 is a schematic diagram of a service configuration method according to a preferred embodiment of the present invention, where each two interconnected SDN network devices may have a plurality of same devices therebetween, and the diagram is here a simplified example. The method of the present invention is applied to this embodiment, and MSPW service is created from access point a to access point D, where the main switching point is B C and the standby switching point is E F. As shown in fig. 6, the method comprises the following steps:
step 10: the user manages an APP or other service configuration systems through the SDN controller, creates MSPW service, selects a service access point A, D, and sets a main switching point to B, C and a standby switching point to E, F.
Step 20: the service configuration module receives the instruction for configuring the service, checks the received parameters, if the parameters are legal, checks whether service path pre-calculation is needed, if so, sends the instruction to the pre-calculation module, namely to step 30, and if not, directly sends the instruction to the service deployment module, namely to step 50. In the embodiment, a pre-calculation method is adopted, and the best path recommendation criterion specified by the user is that the cost value is minimum and delay cannot be greater than 50 ms.
Step 30: if the pre-calculation module identifies MSPW service, the available paths and the service tunnel paths of all PWs need to be calculated. Wherein the available paths of the main 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, the main A-B-C-D and the standby A-E-F-D are taken as the recommended optimal PW paths according to the shortest path algorithm, and the path is sent from the head service access point A to the tail service access point D. In addition, each PW path has its corresponding available TE tunnel path, where the available TE tunnel paths of the main PW path 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 and the like, and the TE tunnel path which is used for preparing the PW path and is A-E-F-D, A-E-F-C-D, A-E-B-C-F-D and the like are similar to the TE tunnel path. In practice, there may be multiple SDN network device nodes between a-B-C-D and a-E-F-D, the PW path and TE tunnel path are typically different, and this embodiment is a simplified diagram. And in all the calculated tunnel paths, checking one by one from small to large according to the cost value of the path, and judging whether the delay of each path meets the requirement of not more than 50ms, wherein the finally recommended optimal path is the path with the minimum cost value of the tunnel path and the condition that the delay is not more than 50 ms. And the pre-calculation module identifies the optimal PW and tunnel paths and returns the optimal PW and tunnel paths to a service configuration interface for selection of a user, the recommended optimal paths are selected by default on the service configuration interface, and at the moment, the user can not directly use the recommended optimal paths, can also check and compare other path information, and selects and issues the path information to the SDN controller.
And under the condition that any tunnel path does not meet the condition that the cost value is minimum and not greater than 50ms, determining that the cost value is higher than the minimum priority of not greater than 50ms, and selecting the tunnel path for configuring the SDN network equipment according to the condition that the cost value is minimum.
Step 40: and the service deployment module receives a final path selected by a user, deploys the tunnel path to the SDN equipment through PCEP, and deploys other related configurations to the SDN equipment by using netconf.
Step 50: a service deployment module for calculating an available path and directly deploying the path to SDN network equipment and returning a deployment result
Step 60: and the service deployment module feeds back the final deployment result to the service configuration system, and the service configuration system records and presents the service deployment result. For easy viewing by the user.
In summary, the present invention provides a method and a system for implementing service path pre-computation based on SDN. And a service path pre-calculation function is added without changing the original flow of rapidly deploying the SDN service. In the MSPW scenario, not only the tunnel path but also the switching point sequence, that is, the optional path of the PW, can be pre-calculated. And the SDN controller returns all available service paths, and recommends the optimal path for the user to select according to the optimal path criterion specified by the user. The user may default to the best path recommended by the SDN controller, or may choose to use other optional service paths as the final path for service deployment. The method and the system greatly improve the degree of freedom and difference of SDN service deployment, reduce the risk that a service path cannot be expected after service deployment, then adjust and modify the service, and improve user experience.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized in a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a memory device and executed by a computing device, and in some cases, the steps shown or described may be executed out of order, or separately as individual integrated circuit modules, or multiple modules or steps thereof may be implemented as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. A method for service configuration, comprising:
determining a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer;
sending a target path in the service configuration paths to Software Defined Network (SDN) network equipment, wherein the target path is used for carrying out service configuration on the SDN network equipment;
the sending a target path in the service configuration paths to an SDN network device includes:
determining one target path from the service configuration paths, wherein the service configuration paths comprise a plurality of paths;
sending the target path to the SDN network device;
determining one target path from the service configuration paths, including:
judging whether multi-segment pseudo wire MSPW service is configured;
under the condition that the MSPW service is judged to be configured, determining a PW path of each pseudo wire PW and a TE tunnel path corresponding to the PW path according to the path determination condition, wherein the service configuration path comprises: the PW path and the TE tunnel path;
and determining a target PW path from the PW paths, and determining a target TE tunnel path from 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.
2. The method of claim 1, wherein determining one of the target paths from the traffic configuration paths comprises:
receiving a path selection instruction, wherein the path selection instruction is used for indicating that the target path is selected;
and responding to the path selection instruction to select the target path from the service configuration paths.
3. The method according to claim 1, wherein said determining a target PW path from among the PW paths comprises:
and under the condition of configuring the switching points of the MSPW service, determining a target PW path from the PW paths according to the sequence of the switching points.
4. A method according to claim 3, characterized in that the order of the switching points is determined by the following steps:
judging whether switching point sequence information sent by the service layer is received;
if the judgment result is yes, determining the sequence indicated by the switching point sequence information as the sequence of the switching points;
and under the condition that the judgment result is negative, determining the sequence of the switching points according to the shortest path condition.
5. The method according to any one of claims 1 to 4,
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; responding to the service configuration request to judge whether the pre-calculation operation of the service configuration path is needed; determining a default path according to a preset default condition and sending the default path to SDN network equipment under the condition that pre-calculation operation of the service configuration path is judged not to be needed;
determining the service configuration path according to the path determination condition carried in the received service configuration request includes: and under the condition that the pre-calculation operation of the service configuration path is judged to be needed, determining a service configuration path according to a path determination condition carried in the received service configuration request.
6. The method of claim 5, wherein the determining whether the pre-computation operation of the service configuration path is required in response to the service configuration request comprises:
judging whether the service configuration request carries the path determining condition or not;
under the condition that the service configuration request carries the path determining condition, judging that the pre-calculation operation of the service configuration path is required to be carried out;
and under the condition that the path determining condition is not carried in the service configuration request, judging that the pre-calculation operation of the service configuration path is not needed.
7. The method of claim 1, wherein said determining one of said target paths from said traffic configuration paths comprises:
under the condition that the path determining condition is the minimum cost value condition, all available service paths are obtained; determining a service path with the minimum cost value from all the available service paths as the target path; or
Under the condition that the path determining condition is the minimum hop count condition, all available service paths are obtained; determining a service path with the minimum hop number value from all the available service paths as the target path; or
Under the condition that the path determination condition is the minimum time delay value condition, all available service paths are obtained; and determining a service path with the minimum time delay value from all the available service paths as the target path.
8. The method of claim 1, wherein the path determination condition comprises:
a path determination comprehensive condition composed of at least two path determination conditions, wherein the path determination conditions are respectively determined according to one of a cost value, a hop count value and a delay value.
9. The method of claim 8, wherein said determining one of said target paths from said traffic configuration paths comprises:
under the condition that the path determination comprehensive condition comprises a first path determination condition and a second path determination condition, acquiring a plurality of available service paths; judging whether a first target path meeting the first path determination condition exists in the plurality of available service paths; under the condition that the first target path exists, judging whether a second target path meeting the second path determining condition exists in the first target path; determining the second target path as the target path under the condition that the second target path is judged to exist; or
Under the condition that the path determination comprehensive condition comprises a first path determination condition, a second path determination condition and a third path determination condition, acquiring a plurality of available service paths; judging whether a third target path meeting the first path determination condition exists in the plurality of available service paths; under the condition that the third target path exists, judging whether a fourth target path meeting the second path determining condition exists in the third target path; under the condition that the fourth target path exists, judging whether a fifth target path meeting the third path determining condition exists in the fourth target path; and determining the fifth target path as the target path under the condition that the fifth target path is judged to exist.
10. The method of claim 9, wherein after obtaining the plurality of available traffic paths, the method further comprises:
under the condition that none of the plurality of available service paths does not meet the path determination comprehensive condition, repeatedly executing the following operations until the target path is determined from the plurality of available service paths, wherein the initial value of the current path determination comprehensive condition is the path determination comprehensive condition:
deleting the path determination conditions with the lowest priority from the current path determination comprehensive conditions to obtain changed path determination comprehensive conditions;
judging whether the target path meeting the changed path determination comprehensive conditions exists in the plurality of available service paths or not;
and under the condition that the target path meeting the changed path determination comprehensive condition does not exist, taking the changed path determination comprehensive condition as the current path determination comprehensive condition.
11. A service configuration request method is characterized by comprising the following steps:
sending a service configuration request carrying a path determination condition to a Software Defined Network (SDN) controller, wherein the service configuration request is used for indicating the SDN controller to determine a service configuration path according to the path determination condition, and a target path in the service configuration path is used for performing service configuration on SDN network equipment receiving the service configuration path;
the service configuration request indicates that one target path is determined from a plurality of paths of service configuration paths, wherein the service configuration paths comprise a plurality of paths;
and under the condition that the MSPW service is configured, the target path comprises a PW path of a pseudo wire PW and a TE tunnel path corresponding to the PW path.
12. The method of claim 11, wherein after sending the service configuration request carrying a path determination condition to the SDN controller, the method further comprises:
and sending a path selection instruction, wherein the path selection instruction is used for indicating that the target path is selected.
13. A service provisioning apparatus, comprising:
the determining module is used for determining a service configuration path according to a path determining condition 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 paths to Software Defined Network (SDN) network equipment, where the target path is used to perform service configuration on the SDN network equipment;
the sending module is used for:
determining one target path from the service configuration paths, wherein the service configuration paths comprise a plurality of paths;
sending the target path to the SDN network device;
the sending module is used for:
judging whether multi-segment pseudo wire MSPW service is configured;
under the condition that the MSPW service is judged to be configured, determining a PW path of each pseudo wire PW and a TE tunnel path corresponding to the PW path according to the path determination condition, wherein the service configuration path comprises: the PW path and the TE tunnel path;
and determining a target PW path from the PW paths, and determining a target TE tunnel path from 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.
14. A service provisioning request apparatus, comprising:
a sending module, configured to send a service configuration request carrying a path determination condition to a Software Defined Network (SDN) controller, where the service configuration request is used to instruct the SDN controller to determine 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 an SDN network device receiving the service configuration path;
the service configuration request indicates that one target path is determined from a plurality of paths of service configuration paths, wherein the service configuration paths comprise a plurality of paths;
and under the condition that the MSPW service is configured, the target path comprises a PW path of a pseudo wire PW and a TE tunnel path corresponding to the PW path.
15. A network management system comprises a service layer, a Software Defined Network (SDN) controller and SDN network equipment, and is characterized in that:
the SDN controller determines a service configuration path according to a path determination condition carried in a received service configuration request, wherein the service configuration request is sent by a service layer;
the SDN controller sends a target path in the service configuration paths to a Software Defined Network (SDN) network device, wherein the target path is used for carrying out service configuration on the SDN network device;
the SDN controller is configured to:
determining one target path from the service configuration paths, wherein the service configuration paths comprise a plurality of paths;
sending the target path to the SDN network device;
the SDN controller is configured to:
judging whether multi-segment pseudo wire MSPW service is configured;
under the condition that the MSPW service is judged to be configured, determining a PW path of each pseudo wire PW and a TE tunnel path corresponding to the PW path according to the path determination condition, wherein the service configuration path comprises: the PW path and the TE tunnel path;
and determining a target PW path from the PW paths, and determining a target TE tunnel path from 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.
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