CN111741382A - Dynamic network topology management system and method - Google Patents

Dynamic network topology management system and method Download PDF

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Publication number
CN111741382A
CN111741382A CN202010531404.9A CN202010531404A CN111741382A CN 111741382 A CN111741382 A CN 111741382A CN 202010531404 A CN202010531404 A CN 202010531404A CN 111741382 A CN111741382 A CN 111741382A
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network
topology
channel
l2vpn
management server
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CN111741382B (en
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王霄
师进
韦文
王欣
张轶涵
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CRSC Research and Design Institute Group Co Ltd
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CRSC Research and Design Institute Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • 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
    • H04L41/0803—Configuration setting
    • H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
    • H04L41/0836—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability to enhance reliability, e.g. reduce downtime
    • 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
    • H04L41/0889—Techniques to speed-up the configuration process
    • 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
    • H04L41/0893—Assignment of logical groups to network elements
    • 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
    • H04L41/12—Discovery or management of network topologies
    • 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
    • H04L41/20—Network management software packages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/009—Topology aspects

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Abstract

The invention belongs to the field of network communication, and particularly relates to a dynamic network topology management system and a dynamic network topology management method. The management system includes: a network management server, a controller and an optical network system; the network management server is used for acquiring a network physical connection configuration table and a topology case connection table; generating a channel table according to the network physical connection configuration table and the topology case connection table, and sending the channel table to a controller; the management system adopts SDN technology and L2VPN technology, and opens an L2VPN channel in an optical network system in a mode of issuing commands through software, changes the connection mode of a service system network and constructs a service system network topology. When the network topology of the service system needs to be changed, the operation can be completed only by operating network management software, so that the working efficiency is further improved, and the reliability of network configuration is improved.

Description

Dynamic network topology management system and method
Technical Field
The invention belongs to the field of network communication, and particularly relates to a dynamic network topology management system and a dynamic network topology management method.
Background
The optical transmission network is realized based on physical optical fiber networking. Because a networking topology is only suitable for one use scene, under the condition that multiple scenes need to be switched rapidly, the network cable is plugged and pulled manually. Re-networking is time consuming and laborious; and the optical fiber, the optical module and the like are seriously lost by continuously plugging and unplugging the network cable in the networking process. When the network scale is large, manual wiring is easy to make mistakes, error points are difficult to check after mistakes are made, and the maintenance cost is high. Meanwhile, the mode of manually configuring the equipment and reasonably connecting the equipment for networking has higher requirements on technical personnel, and a user needs to have good network knowledge and skills.
On the basis of manual wiring, the prior art provides an intelligent distribution frame. The intelligent distribution frame supports planning of network topology in software in advance, and uses flashing indicator lamps to assist network workers in wiring according to the network topology. The patch panel is provided with a touch switch which is touched once a jumper wire is connected to the patch panel and informs the system module of the connection of the link through a circuit. The intelligent distribution frame also has the functions of storing the detected link relation into a database, automatically updating the database according to the detected jumper connection change, giving an alarm when wrong plugging or wrong link is found, giving an alarm when a wiring socket does not accord with a preset network interface and the like.
Although the intelligent distribution frame is used for reducing the misoperation rate of pure manual distribution, improving the efficiency, reducing the working pressure of workers and improving the reliability of network distribution, the intelligent distribution frame is actually only an auxiliary tool for manual distribution and cannot provide the functions of automatically adjusting network topology according to planning, debugging the distribution, alarming network faults and the like.
Disclosure of Invention
In view of the above problems, the present invention provides a dynamic network topology management system, which includes: a network management server, a controller and an optical network system;
the network management server is used for acquiring a network physical connection configuration table and a topology case connection table; generating a channel table according to the network physical connection configuration table and the topology case connection table, and sending the channel table to a controller;
the controller is used for acquiring a channel table sent by the network management server, calculating to obtain an optimal channel corresponding to the channel table, generating a flow table according to the optimal channel, and sending the flow table to the optical network system;
the optical network system is connected with the service system and used for receiving the flow table sent by the controller and constructing an L2VPN channel according to the flow table, wherein the L2VPN channel is used for providing a communication channel for the specified service in the service system.
Further, the network management server obtains a network physical connection configuration table and/or a topology case connection table through a generation and/or import mode.
Further, the network physical connection configuration table obtained by the network management server includes: node sequence number, description, device name and port;
the topology case connection table obtained by the network management server comprises: topology name, traffic type, bandwidth, originating node, and terminating node.
Further, the network management server is also used for storing and managing a network physical connection configuration table and a topology case connection table;
managing the network physical connection configuration table and topology case connection table includes modifying and/or deleting and/or exporting operations.
Further, the channel table generated by the network management server includes: l2VPN name, bandwidth, originating node device, originating node port, terminating node device, and terminating node port.
Further, the network management server is further configured to monitor a flow table generation and creation progress of the controller:
if the flow table creation of part of the L2VPN channels corresponding to the current channel table fails, the network management server deletes the issued flow table corresponding to the L2VPN channel which is successfully created through the controller, and prompts that the activation of the topology case fails;
and if the flow tables of all the L2VPN channels corresponding to the current channel table are successfully established, updating the state of the topology case to be an activation state, and prompting that the topology case is successfully activated.
Furthermore, each topology case corresponds to one service type, and each service type corresponds to one or more topology cases;
the number of topology cases in each service type, which are active at the same time, does not exceed one.
The invention also provides a dynamic network topology management method, which comprises the following steps:
a network management server obtains a network physical connection configuration table and a topology case connection table;
the network management server generates a channel table according to the network physical connection configuration table and the topology case connection table; sending the channel table;
the controller obtains a channel table sent by the network management server, and calculates to obtain an optimal channel corresponding to the L2VPN channel table; generating a flow table according to the optimal channel, and sending the flow table;
the optical network system acquires a flow table sent by the controller, and an L2VPN channel is constructed according to the flow table.
Further, the network management server obtains the network physical connection configuration table and the topology case connection table by means of generation and/or import.
Further, the network physical connection configuration table includes one or more data of node serial number, description, device name and port;
the topology case connection table comprises one or more data of topology name, service type, bandwidth, starting node and terminating node;
the L2VPN path table includes: one or more of an L2VPN name, bandwidth, originating node device, originating node port, terminating node device, and terminating node port.
The management system adopts SDN technology and L2VPN technology, and opens an L2VPN channel in an optical network system in a mode of issuing commands through software, changes the connection mode of a service system network and constructs a service system network topology. When the network topology of the service system needs to be changed, the operation can be completed only by operating network management software, so that the working efficiency is further improved, and the reliability of network configuration is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a dynamic network topology management system according to an embodiment of the invention;
fig. 2 shows a flow diagram of a dynamic network topology management method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a dynamic network topology management system, as shown in fig. 1, the management system comprises a network management server, a controller and an optical network system.
The network management server is used for generating and managing a network physical connection configuration table; the system comprises a topology case connection table, a service system and a service server, wherein the topology case connection table is used for establishing the topology case connection table according to a target topology of the service system and managing the topology case connection table; and the L2VPN channel table is generated according to the network physical connection configuration table and the topology case connection table, and the L2VPN channel table is sent.
The controller is used for acquiring an L2VPN channel table sent by a network management server, generating an SDN flow table according to the L2VPN channel table, and sending the SDN flow table.
The optical network system is connected with the service system and used for receiving the SDN flow table sent by the controller and constructing the L2VPN channel according to the SDN flow table.
Specifically, the optical network system (PFC) is composed of a plurality of groups of SDN switching devices and connection fibers between the SDN switching devices. The SDN switching devices are respectively located at nodes of the management system.
The service system is an external system and comprises a plurality of groups of service terminals. Each service terminal is provided with a service port, which is denoted as S in fig. 11～Sn。
By adjusting the line connection mode between SDN switching devices in the optical network system, the adjustment of the connection path between service terminals in the service system can be realized, thereby realizing the dynamic switching of network topologies of different service systems in the service system.
Specifically, the management system further comprises a network management terminal, and the network management terminal is connected with the network management server. The network management terminal is a user operation interface terminal of the network management server, the network management server runs network management software, and a user can operate the network management software through the network management terminal to manage a system network.
Illustratively, a user plans and generates and stores a network physical connection configuration table in network management software through a network management terminal, and service ports of a service terminal correspond to switching equipment ports in an optical network system one by one through the network physical connection configuration table.
Table 1 network physical connection configuration table
Node sequence number Description of the invention Device name Port(s)
… … … …
In the network management software, a network physical connection configuration table can be created or imported. As shown in table 1, the network physical connection configuration table includes, but is not limited to, data such as node serial number, description, device name, and port.
Wherein, the node sequence number is a port name of the service system on the service terminal of the current node, and the name is unique and is denoted as S in fig. 11～Sn。
The description records basic condition information of the current node, which is convenient for technical staff to check, for example, the service type of the current node.
The device name represents the name of an SDN switching device at the current node, the SDN switching device belongs to an optical network system, and the SDN switching device is connected with a service terminal at the current node.
The port represents a port name on the SDN switching device at the current node, denoted P in fig. 11～Pn。
And the service port on the service terminal is connected with the port on the SDN switching equipment in the optical network system through a physical optical fiber or an Ethernet cable.
When the physical connection between the service terminal and the SDN switching device in the optical network system changes, for example, device replacement, network plugging and unplugging, etc., the network physical connection configuration table may be modified and deleted through network management software.
The management of the network physical connection configuration table is convenient for constructors to manage physical equipment in actual use, and the technical capability requirement on users is reduced.
Illustratively, the user can also create or import the topology case connection table in the network management software through the network management terminal. According to the target network topology of the service system, a corresponding topology case connection table can be created. That is, each topology case corresponds to a topology case connection table, and one topology case connection table corresponds to a specific service system network topology.
Table 2 topology case connection table
Topology name Type of service Bandwidth of Starting node Termination node
… … … … …
As shown in table 2, the topology case connection table includes, but is not limited to, topology name, traffic type, bandwidth, originating node, terminating node, and so on.
Wherein the topology name is the name of a topology case, and the topology name has a unique identifier. I.e. one topology name corresponds to a particular service system network topology.
The service type represents the service type of the current topology case. And each topology case corresponds to a service system network topology, and each network topology corresponds to a service type. And in the service system, only one topological case of each service type can be in an active state currently.
The bandwidth is expressed as the bandwidth required to implement the current topology case. And the subsequent controller calculates the planned node connection path for the current topology case, and the bandwidth capacity requirement needs to be met.
The starting node is the name of the starting node of the network topology of the current service system; the termination node is the name of the termination node of the network topology of the current service system. And defining the starting node and the terminating node of the topology case to define the service port connection mode of the service system network topology. Each service system network topology corresponds to a plurality of service port connection lines, namely each topology case connection table corresponds to a plurality of starting nodes and terminating nodes.
The starting node and the terminating node are ports of a service terminal in a service system; the start node and the end node are represented by node sequence numbers. Namely, the information of the starting node and the ending node in the topology case connection table corresponds to the node sequence number information in the network physical connection configuration table.
Preferably, the number of the termination nodes in the topology case connection table can be set to one or two. For example, a topology case connection table corresponds to one topology name, one topology name corresponds to one start node, and one topology name corresponds to two end nodes. When the number of the termination nodes is two, a master-standby mode is formed, preferably, a first termination node is used, and when the first termination node is occupied or cannot be started, a second termination node is adopted. The information of the second termination node is also stored in the topology case connection table.
The network management software supports the import of the topology case connection table and stores the topology case connection table into the network management database. In a graphical interface of network management software, all topology case connection table information can be checked, query can be carried out according to information such as topology names and activation states, and query results are displayed in a list form. The newly created or imported topology case connection table is defaulted to a disabled state by the network management server. The network management software can also perform batch deletion, batch export and other processing on the topology case connection table, and manually select one topology case connection table for activation. When a topology case is in an active state, the topology case connection table cannot be deleted.
Illustratively, a user can select a topology case connection table through network management software to perform activation operation, and the network management software generates a corresponding L2VPN channel table according to the selected topology case. And the controller performs optimal channel calculation according to the L2VPN channel table to obtain an optimal L2VPN channel meeting the requirement, converts the optimal L2VPN channel into an SDN flow table and issues the SDN flow table to corresponding SDN switching equipment in the optical network system. And the SDN switching devices establish connection with each other according to the SDN flow table to generate corresponding L2VPN channels. Thereby completing the construction of the target network topology in the service system.
Specifically, the network management server matches the topology case connection table with the physical connection configuration table to generate all L2VPN channel tables satisfying the conditions of connection relationship, bandwidth, and the like.
Preferably, if the topology case connection table has two termination nodes, the controller calculates to generate two L2VPN channels, i.e., the active/standby links. And the primary and secondary links do not overlap and intersect as much as possible. Any one of the main and standby links can be selected according to the use requirement.
TABLE 3L 2VPN channel Table
Figure BDA0002535364880000071
As shown in table 3, the L2VPN path table includes a plurality of sets of path table information, and each set of path table information includes, but is not limited to, an L2VPN name, a bandwidth, an originating node device, an originating node port, a terminating node device, a terminating node port, and other data.
Wherein the L2VPN name represents the name of the current L2VPN channel, and the L2VPN name has uniqueness in the management system.
The bandwidth is the bandwidth capacity of the current L2VPN channel, and the bandwidth capacity of the L2VPN channel is not less than the bandwidth demand capacity in the topology case connection table.
The originating node device represents a name of an SDN switching device of the current L2VPN tunnel at the originating node.
The origin node port represents a port name of a current L2VPN tunnel on an SDN switching device at the origin node.
The termination node device represents a name of an SDN switching device of the current L2VPN tunnel at the termination node.
The termination node port represents a port name of the current L2VPN tunnel on an SDN switching device at the termination node.
The starting node equipment and the terminating node equipment are represented by equipment names; the starting node port and the terminating node port are represented by ports. That is, the start node device and the end node device in the L2VPN channel table correspond to the device names in the physical connection configuration table. The starting node port and the terminating node port in the L2VPN channel table correspond to ports in a physical connection configuration table.
And the network management server issues the generated L2VPN channel table to the controller through the REST interface. The controller obtains L2VPN channel tables sent by the network management server, each L2VPN channel table comprises a plurality of groups of channel table information, each group of channel table information corresponds to the connection relation of two service terminals, namely each group of channel table information comprises an L2PVN name, a bandwidth, an initial node device, an initial node port, a termination node device and a termination node port. And the controller performs optimal channel calculation according to the information of each group of channel tables to obtain an optimal L2VPN channel which meets the information requirement of each group of channel tables. The optimal channel calculation is represented as: and for each group of channel table information, selecting a channel with the minimum hop number and the maximum residual bandwidth from all physical channels according with the group of channel table information as an optimal L2VPN channel corresponding to the group of channel table information. And the controller converts the calculation result into an SDN flow table and sends the SDN flow table to the corresponding SDN switching equipment in the optical network system. And the SDN switching devices establish connection with each other according to the SDN flow table to generate corresponding L2VPN channels. Thereby completing the construction of the target network topology in the service system.
And combining the optimal channels corresponding to all the channel table information to obtain the optimal network path of the topology case. The optimal L2VPN channel is calculated through the controller, so that system resources are saved, and the operation efficiency of a service system is improved.
Preferably, the controller feeds back channel information of the optimal L2VPN channel, and state information of an SDN switching device and a link in an optical network system to network management software.
The SDN switching equipment in the optical network system is controlled by the controller, so that the states of all the SDN switching equipment and links can be acquired, the optimized data forwarding path can be calculated, the calculation planning work of technicians is replaced, and the technical capability requirement on users is reduced.
Specifically, the L2VPN tunnel is a transmission tunnel encapsulated in a data link layer, through which a data packet is forwarded, and is transferred from station to a destination. During the transmission of the data packet, no further analysis of the data packet is required, and no complex routing decision for the data packet is required at each network node (SDN switching device). Therefore, after the network topology construction of the topology case is completed, the optical network system is only used as a connection device, that is, the L2VPN channel in the optical network system is equivalent to an "optical fiber" and only functions as an information transmission channel. Two service ports in the service system are connected through an L2VPN channel in the optical network system, which is equivalent to direct connection through one optical fiber.
Preferably, the controller creates the L2VPN tunnel according to the L2VPN tunnel table calculation. In this process, the network management server monitors whether all the L2VPN tunnels in the controller for the L2VPN tunnel table are created successfully. And if only part of the SDN flow tables of the L2VPN channels are successfully created and part of the SDN flow tables of the L2VPN channels are failed to be created, performing rollback operation, namely deleting issued SDN flow tables corresponding to the successfully created L2VPN channels and prompting the failure of activation of the topology case at a network management terminal. And if the SDN flow tables of all the L2VPN channels are successfully established, the network management software updates the state of the topology case to an activation state and prompts the network management terminal that the topology case is successfully activated.
Specifically, the management system adopts an SDN technology, which separates independent control planes and forwarding planes of each device in a conventional network, and integrates the control planes of all devices together to form a controller of the entire network. The equipment in the original network only keeps the forwarding plane, and only needs to be responsible for forwarding data, so that the efficiency of the network is improved.
The open interface of the SDN network structure includes a Restful interface with an application (using SDN network resources) and an SDN control protocol, such as an Openflow protocol, with a network device. The Restful interface receives instructions issued to the controller, such as instructions for creating an L2VPN channel and deleting the L2VPN channel.
Illustratively, when the controller receives an instruction to create an L2VPN tunnel, a transmission tunnel from an originating node port to a terminating node port defined in the L2VPN tunnel is created, so that the two nodes are directly equivalent to a direct connection.
The management system issues an SDN flow table to the SDN switching device through an SDN control protocol, and the SDN switching device achieves establishment of an L2VPN channel according to the SDN flow table. Therefore, the invention manages the optical network system through the controller, and monitors and controls the SDN switching devices and the links among the devices in the optical network system through the controller software; and managing the management system through a network management server, and monitoring and controlling each device, each system and each link in the management system through network management software.
Preferably, the network management server and the controller can also provide network detection and alarm functions.
Specifically, the state and connection condition of each SDN switching device in the optical network system are displayed on a network management software interface, and a network topology diagram of a topology case that is successfully activated is displayed. In the network management software, the connected SDN switching devices and links in the optical network system can be checked. If the link is disconnected or the running state is abnormal, the controller marks the part corresponding to the link on the network topological graph and feeds the part back to the network management software interface for display. For example, for a link that is disconnected or has an abnormal operating state, the corresponding line is displayed in red on the network topology map. The controller can also monitor the real-time flow of each link in the optical network system, and the real-time flow of each link can also be displayed on a network management software interface to assist a user in monitoring the network load of the optical network system.
Specifically, the network management server monitors and counts the network state of the whole management system, and a user can set monitoring contents and a threshold value in a network management software in a self-defined manner through the network management terminal. For example, states such as disconnection of devices (including but not limited to SDN switching devices and services), disconnection of links (including but not limited to links between network management servers, controllers and optical network systems, and links between SDN switching devices and service terminals), and exceeding of thresholds of traffic (including but not limited to communication traffic between SDN switching devices and service terminals) are monitored, and an audible and visual alarm is given by the network management terminal to prompt a user to find wiring errors and network faults in time.
The system is based on SDN technology and L2VPN technology, and by means of issuing commands through software, L2VPN channels in the network are opened, connection modes among network nodes are changed, and network topology is built. When the network topology needs to be changed, the network topology can be completed only by operating software, so that the working efficiency is further improved, and the reliability of network configuration is improved.
The network management software plays a role of communicating a bridge between a user and the SDN network, and the L2VPN channel list issued to the controller is represented by an intuitive topological case connection table. The management difficulty of the topology case data table is reduced, and a user can understand and master the operation requirement of the management system more easily. And the management of the network physical connection configuration table is the one-to-one corresponding management of the SDN switching equipment and the service terminal, so that the management of constructors on-site physical equipment is more visual, and the construction and maintenance difficulty of the physical equipment is reduced.
The present invention further provides a dynamic network topology management method according to the above dynamic network topology management system, as shown in fig. 2, the management method includes:
a network management server obtains a network physical connection configuration table and a topology case connection table;
the network management server generates an L2VPN channel table according to the network physical connection configuration table and the topology case connection table; sending the L2VPN channel table;
the controller obtains an L2VPN channel table sent by the network management server, generates an SDN flow table according to the L2VPN channel table, and sends the SDN flow table;
an SDN switching device in an optical network system acquires an SDN flow table sent by a controller, and the optical network system constructs an L2VPN channel according to the SDN flow table.
Specifically, the network management server obtains a network physical connection configuration table and a topology case connection table through a generation and/or import mode. And the network physical connection configuration table and/or topology case connection table planning can be stored and managed in the network management server.
Specifically, the management of the network physical connection configuration table and/or the topology case connection table plan includes, but is not limited to, modification, deletion, and the like.
The network physical connection configuration table includes, but is not limited to, data such as node serial number, description, device name and port. And the service ports of the service terminal are in one-to-one correspondence with the ports of the switching equipment in the optical network system through a network physical connection configuration table.
The topology case connection table includes, but is not limited to, topology name, traffic type, bandwidth, originating node, terminating node, and the like. Each topology case corresponds to a topology case connection table, and one topology case connection table corresponds to a specific service system target network topology.
Further, the network management server obtains an activation instruction sent by the network management terminal, matches a topology case connection table corresponding to the activation instruction with a physical connection configuration table according to the activation instruction, and outputs all L2VPN channel tables by calculating available resources in the optical network system under the conditions of meeting the connection relation, bandwidth and the like.
Specifically, the L2VPN path table includes, but is not limited to, a L2VPN name, a bandwidth, an originating node device, an originating node port, a terminating node device, a terminating node port, and other data.
Further, the controller obtains L2VPN channel tables sent by the network management server, where each L2VPN channel table includes a plurality of sets of channel table information, and each set of channel table information corresponds to a connection relationship between two service terminals, that is, each set of channel table information includes an L2PVN name, a bandwidth, an originating node device, an originating node port, a terminating node device, and a terminating node port.
And the controller performs optimal channel calculation according to the information of each group of channel tables to obtain all optimal L2VPN channels meeting the information requirements of each group of channel tables. The optimal channel calculation is represented as: and for each group of channel table information, selecting a channel with the minimum hop number and the maximum residual bandwidth from all physical channels according with the group of channel table information as an optimal L2VPN channel corresponding to the group of channel table information. And the controller converts the calculation result into an SDN flow table and sends the SDN flow table to the corresponding SDN switching equipment in the optical network system.
And the SDN switching devices establish connection with each other according to the SDN flow table to generate corresponding L2VPN channels. Thereby completing the construction of the target network topology in the service system.
The invention converts the connection relationship between each service terminal of the service system into the connection relationship of the L2VPN Channel in the optical network system (PFC). The programmable and automatic control of the service system network topology is realized by controlling the connection relation of the L2VPN channel in the optical network system. The optical network system is adapted to dynamic topology switching of a service system, repeated network cable plugging and unplugging and complex networking work are improved to a software layer, and the method is simple and convenient to operate, time-saving and labor-saving.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A dynamic network topology management system, the management system comprising: a network management server, a controller and an optical network system;
the network management server is used for acquiring a network physical connection configuration table and a topology case connection table; generating a channel table according to the network physical connection configuration table and the topology case connection table, and sending the channel table to a controller;
the controller is used for acquiring a channel table sent by the network management server, calculating to obtain an optimal channel corresponding to the channel table, generating a flow table according to the optimal channel, and sending the flow table to the optical network system;
the optical network system is connected with the service system and used for receiving the flow table sent by the controller and constructing an L2VPN channel according to the flow table, wherein the L2VPN channel is used for providing a communication channel for the specified service in the service system.
2. The dynamic network topology management system of claim 1, wherein the network management server obtains the network physical connection configuration table and/or the topology case connection table by way of generation and/or import.
3. The dynamic network topology management system according to claim 1 or 2, wherein the network physical connection configuration table obtained by the network management server includes: node sequence number, description, device name and port;
the topology case connection table obtained by the network management server comprises: topology name, traffic type, bandwidth, originating node, and terminating node.
4. The dynamic network topology management system of claim 1, wherein the network management server is further configured to store and manage a network physical connection configuration table and a topology case connection table;
managing the network physical connection configuration table and topology case connection table includes modifying and/or deleting and/or exporting operations.
5. The dynamic network topology management system of claim 1, wherein the path table generated by the network management server comprises: l2VPN name, bandwidth, originating node device, originating node port, terminating node device, and terminating node port.
6. The dynamic network topology management system according to claim 1, wherein the network management server is further configured to monitor a flow table generation creation progress of the controller:
if the flow table creation of part of the L2VPN channels corresponding to the current channel table fails, the network management server deletes the issued flow table corresponding to the L2VPN channel which is successfully created through the controller, and prompts that the activation of the topology case fails;
and if the flow tables of all the L2VPN channels corresponding to the current channel table are successfully established, updating the state of the topology case to be an activation state, and prompting that the topology case is successfully activated.
7. The dynamic network topology management system of claim 6, wherein each of the topology cases corresponds to a service type, each service type corresponding to one or more topology cases;
the number of topology cases in each service type, which are active at the same time, does not exceed one.
8. A dynamic network topology management method, the management method comprising:
a network management server obtains a network physical connection configuration table and a topology case connection table;
the network management server generates a channel table according to the network physical connection configuration table and the topology case connection table; sending the channel table;
the controller obtains a channel table sent by the network management server, and calculates to obtain an optimal channel corresponding to the L2VPN channel table; generating a flow table according to the optimal channel, and sending the flow table;
the optical network system acquires a flow table sent by the controller, and an L2VPN channel is constructed according to the flow table.
9. The dynamic network topology management method according to claim 8, wherein the network management server obtains a network physical connection configuration table and a topology case connection table by means of generation and/or import.
10. The dynamic network topology management method according to claim 8, wherein the network physical connection configuration table comprises one or more of node sequence number, description, device name and port;
the topology case connection table comprises one or more data of topology name, service type, bandwidth, starting node and terminating node;
the L2VPN path table includes: one or more of an L2VPN name, bandwidth, originating node device, originating node port, terminating node device, and terminating node port.
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