CN108768685B - Large-scale information communication network real-time simulation system - Google Patents
Large-scale information communication network real-time simulation system Download PDFInfo
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- 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
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention relates to a real-time simulation system of a large-scale information communication network, which comprises a real network element, a test device, NFV/SDN equipment, a network simulation system and an information system, wherein the real network element, the NFV/SDN equipment and the network simulation system jointly form a real network topology, client virtual machines are further arranged in the NFV/SDN equipment and the network simulation system, the test device and the information system are connected with the real network topology, and the real network topology is connected with the client virtual machines through the network simulation system. The invention utilizes the connection of the physical network and the network simulation software to disperse the DES simulated by the large-scale network into a plurality of simulation software, thereby realizing the real-time simulation of the large-scale network by using less hardware resources.
Description
Technical Field
The invention relates to the technical field of information communication, in particular to a real-time simulation system of a large-scale information communication network.
Background
Aiming at complex scenes such as network planning optimization, network operation maintenance training, network fault drilling, network shooting range attack and defense drilling of a data communication network, in order to enable a user to be separated from an actual working environment, a large-scale data communication network real-time simulation environment is usually provided for the user, and simulation, rehearsal and verification of a new scheme and a new technology are carried out in a virtual simulation environment.
At present, the simulation method of the information communication network mainly uses simulation software to simulate the network behavior, but the following problems are present: firstly, the method comprises the following steps: in the process of network Simulation by Simulation software, a series of Discrete Event Simulation (DES for short) is carried out, and when the Simulation events are less, the Simulation system can trigger the Simulation events one by one according to the time of the real world; when the simulation network has a large scale, high complexity of service behaviors and many simulation events, the DES processing time is often longer than the preset network simulation time, so that the time between the simulation system and the real world cannot be synchronized. Secondly, the method comprises the following steps: in order to solve the problem of long DES processing time, parallel Discrete Event Simulation (PDES for short) can be performed by using a plurality of CPU kernel computing resources, but the efficiency of the method depends on a synchronous scheduling algorithm among Parallel Discrete events, and when a multi-core multi-thread PDES is developed in an application program, a large amount of CPU resources are consumed by the Parallel processing scheduling algorithm along with the increase of the number of started threads, so that the hardware computing resources cannot be effectively utilized. Thirdly, the steps of: general network simulation software can develop or open a Hardware system-in-Loop (Hardware in Loop) data interface, real routers, switches, ethernet data terminals and other equipment are accessed to the network simulation software system by utilizing an Ethernet interface of a computer, so as to realize the network behavior simulation of the participating system. Fourthly: the purpose of real-time network simulation is to preview the change and adjustment of the existing network, wherein the change of network topology and protocol configuration is included, and the change of service flow brought by a newly deployed information system is also included, and the new service flow generated on the new system also can influence the network performance, the network service flow in the simulation software is generally generated by a data service generator, and if the flow model is not matched with the consistency of the flow characteristics in the real network, the simulation result can be influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the problem of performing real-time simulation on a large-scale data communication network only by using simulation software in the prior art, thereby providing a large-scale information communication network real-time simulation system capable of effectively reducing impact on a single simulation kernel and increasing and improving the utilization rate of a CPU.
In order to solve the technical problem, the real-time simulation system for the large-scale information communication network comprises a desktop interactive computer, a simulation switch connected with the desktop interactive computer, a simulation management server connected with the simulation switch, and a resource pool connected with the simulation switch, wherein a real network element and a test device are arranged in the resource pool, the simulation switch is further connected with a simulation server cluster, the simulation server cluster comprises an NFV/SDN device, a network simulation system, and an information system, wherein the real network element, the NFV/SDN device and the network simulation system form a real network topology together, a client virtual machine is further arranged in the NFV/SDN device and the network simulation system, the test device and the information system are connected with the real network topology, and the real network topology is connected with the client virtual machine through the network simulation system.
In one embodiment of the invention, a plurality of network simulators are arranged in the network simulation system.
In an embodiment of the present invention, the real network topology and the network simulation system and the client virtual machine are connected through a semi-physical interface.
In one embodiment of the invention, the interface connected with the computer running the network simulator on the edge node of the real network topology is mapped to the edge node of the virtual network topology formed by the network simulation system, and the interface connected with the edge node of the real network topology on the computer running the network simulator is mapped to another node of the virtual network topology.
In one embodiment of the invention, the interface IP address of the computer running the network simulator on the edge node of the real network topology is the same as the IP address of the edge node of the virtual network topology, and the interface IP address of the computer running the network simulator connected to the edge node of the real network topology remains the same as the interface IP address of another node of the virtual network topology.
In one embodiment of the invention, the edge node of the real network topology adds a static address resolution protocol list.
In one embodiment of the invention, the interface IP address on the computer running the network simulator connected to the edge node of the real network topology is bound to the physical address of the interface on the computer running the network simulator connected to the edge node of the real network topology.
In one embodiment of the invention, the computer running the network simulator is the desktop interaction computer or the client virtual machine.
In one embodiment of the invention, the interfaces of the emulated switch include an InfiniBand interface, a GE/10GE Ethernet interface, and other high-speed data interfaces.
In an embodiment of the present invention, a management platform is disposed on the simulation management server, the management platform includes a network real-time simulation management system, and the management platform implements configuration management of multiple functions through a control script.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the real-time simulation system for the large-scale information communication network, disclosed by the invention, deploys the NFV/SDN equipment, the network simulation system and the information system in a simulation server cluster, carries out large-scale real-time network simulation by combining real communication equipment and a test instrument and meter, simulates the network behavior of the large-scale data communication network in real time, can aim at complex scenes such as network planning optimization, network operation maintenance training, network fault drilling, network target range attack and defense drilling and the like of the data communication network, enables a user to be separated from an actual working environment, and carries out simulation, rehearsation and verification of a new scheme and a new technology in an isolated simulation environment. In addition, the invention manages the simulation hardware resources uniformly, realizes that the script dynamically manages and configures the simulation topology of the network communication in the resource pool, collects information and changes scenes, thereby realizing the high-efficiency and rapid configuration of the complex network test environment, automatically configuring the scenes and collecting test information, and greatly improving the test efficiency of the network communication equipment and the information communication system; in addition, the testing environment has high fidelity and can be used as a network shooting range to perform network information safety related testing and attack and defense drilling.
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In order that the present disclosure may be more readily understood, a more particular description of the disclosure will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings
FIG. 1 is a schematic diagram of a large-scale information communication network real-time simulation system according to the present invention;
FIG. 2 is a schematic diagram of the connection of the large-scale information communication network real-time simulation system of the present invention;
FIG. 3 is a schematic diagram of the connection between a real network topology and a virtual network topology according to the present invention;
FIG. 4 is a first embodiment of the present invention in which a real network topology is connected to a virtual network topology;
FIG. 5 is a second embodiment of the present invention in which a real network topology is connected to a virtual network topology;
fig. 6 is a third embodiment of the connection of a real network topology to a virtual network topology of the present invention.
Detailed Description
As shown in fig. 1 and fig. 2, this embodiment provides a large-scale information communication network real-time simulation system, which includes a desktop interactive computer 10, a simulation switch 20 connected to the desktop interactive computer 10, a simulation management server 30 connected to the simulation switch 20, and a resource pool 40 connected to the simulation switch 20, where a real network element and a test device 41 are disposed in the resource pool 40, the simulation switch 20 is further connected to a simulation server cluster 50, the simulation server cluster 50 includes an NFV/SDN device and network simulation system 51, a network simulation system 52, and an information system 53, where the real network element, the NFV/SDN device, and the network simulation system 51 together form a real network topology, the NFV/SDN device and the network simulation system 51 further include a client virtual machine 54, the test device 41 and the information system 53 are both connected to the real network topology, and the real network topology is connected to the client virtual machine 54 through the network simulation system 52.
The large-scale information communication network real-time simulation system of this embodiment includes a desktop interactive computer 10, a simulation switch 20, a simulation management server 30, a resource pool 40 and a simulation server cluster 50, wherein the desktop interactive computer 10 is used as a human-computer interaction interface for simulation by a user, the simulation switch 20 is connected to the desktop interactive computer 10, the simulation switch 20 is used for providing a switching function, the simulation management server 30 is connected to the simulation switch 20, the simulation management server 30 is a core part of the whole system and is responsible for allocating hardware resources of the simulation server cluster 50, deploying a simulation network topology, deploying simulation services, deploying real devices and test instrument meters, providing a human-computer interaction interface service for simulation network, the resource pool 40 is connected to the simulation switch 20, the resource pool 40 is provided with real network elements and test devices 41, the test devices 41 are used for measuring network system functions and performance parameters, the simulation switch 20 is connected to the simulation server cluster 50, simulation operation is mainly completed in the simulation server cluster 50, the simulation server 50 includes a simulation network information server 50, a simulation network server 52, a virtual network system application server 51 and a virtual network management server 51, and a virtual network management server 51 for forming a virtual network system access system, and a virtual network management server 51, the client virtual machine 54 requests to access the service of the information system 53, a connection passing through the whole network topology is established, the test device 41 and the information system 53 are both connected with the real network topology, and the real network topology is connected with the client virtual machine 54 through the network simulation system 52, so that the real network topology and the virtual network topology form a network topology together, and the simulation verification of multiple indexes of the network is performed. The invention utilizes the scene that the real object is accessed into the single simulation software to jointly simulate, realizes the interconnection and intercommunication among a plurality of devices such as real Network communication equipment, network Function Virtualization (NFV) equipment, simulator equipment mirror image and the like and a plurality of simulation nodes in the simulation software, utilizes the mode of combining virtual and real, disperses the DES simulated by a large-scale Network into a plurality of simulation software, realizes the real-time simulation of the large-scale Network by using less hardware resources, ensures that the simulation nodes in each simulation software are less, thereby reducing the congestion of the DES, avoids the event scheduling waiting carried out during the congestion due to processing the DES in real time, improves the utilization rate of CPU hardware resources and the real-time performance of the DES of a single simulation system, and greatly expands the scale of the real-time simulation Network under the condition that the hardware resources are limited; in addition, a real information service system is accessed into the simulation network, and real network service flow is generated by utilizing access interaction of the simulation network, so that the flow model is closer to a real application scene.
In this embodiment, the CPU in the simulation server cluster 50 may perform two operations: the first is simulation operation, which allocates CPU resource to virtual machine of network equipment to simulate real network equipment in real time, and the input and output of the equipment are the same as the real network equipment. Such as NFV device/SDN device/network device image emulator; and the second is simulation operation, which simulates a subnet topology and simulates and executes the network discrete events of each node in the topology according to the time sequence. DES network simulation software such as OPNET, EXata, OMNeT + +, NS-2 and the like, thereby improving the utilization rate of the CPU.
The network simulation system 52 is provided with a plurality of network simulators, wherein the network simulators are network simulation software, and respectively simulate a plurality of subnet topologies through the plurality of network simulation software, so that the virtual network scale can be greatly expanded; in addition, in a plurality of independent network simulation software, a scheduling algorithm of a PDES is replaced by coarse-grained time synchronization, the utilization rate of a CPU is increased and improved, the consumption of CPU operation resources on the PDES scheduling algorithm is reduced, the CPU is more used for executing DES, more network nodes and network discrete events can be simulated by using limited CPU resources, and the problem that in the traditional large-scale network simulation, in the parallel discrete event processing process, threads wait for each other according to the sequence can be solved.
As shown in fig. 3, in order to implement seamless data transmission and dynamic generation of a routing table of a real network and a virtual network in network simulation software, the real network topology and the network simulation system 52 and the client virtual machine 54 are connected by a semi-physical interface. Since the network simulation system 52 is used to form a virtual network topology, that is: the real network topology and the virtual network topology and the client virtual machine 54 are connected through semi-physical interfaces. Specifically, an interface A1 of the edge node a of the real network topology connected to the computer B running the network simulator is mapped to an edge node 1 of the virtual network topology, and an interface of the computer B running the network simulator connected to the edge node a of the real network topology is mapped to another node of the virtual network topology, such as a 2-1 interface of a node 2; the IP address of an interface A1 connected with a computer B of the running network simulator on the edge node A of the real network topology is the same as the IP address of the edge node 1 of the virtual network topology, and the IP address of an interface B1 connected with the edge node A of the real network topology on the computer B of the running network simulator remains the same as the interface IP address of another node 2-1 of the virtual network topology.
Adding a static address resolution protocol list to the edge node A of the real network topology, and binding the IP address of the interface B1 connected with the edge node A of the real network topology on the computer B of the running network simulator with the physical address (MAC for short) of the interface B1 connected with the edge node A of the real network topology on the computer B of the running network simulator, so as to avoid the interference caused by the inconsistency of the physical addresses of the mapping formats of the virtual node and the real node. Configuring the working mode of the edge node 1 of the virtual network topology to forward data in all directions to the node 2, wherein the data sent by the edge node A of the real network topology to the computer B of the running network simulator is captured by simulation software at the interface B1 to enter the virtual network, the data sent by the node 1 to the node 2 is mapped in the virtual network, the data sent by the node 2 in the virtual network to the node 1 is mapped to the interface B1 by the simulation software to send the real data to the edge node A of the real network topology, so that the bidirectional seamless transmission is realized in the IP data flow of the real network and the virtual network, the data source address and the destination address are matched with the real network and the virtual network, and the routing information can be dynamically interacted because the real network and the virtual network can be combined at will.
The computer running the network simulator is the desktop interaction computer 10 or the client virtual machine 54. The interfaces of the simulation switch 20 include an InfiniBand interface and a GE/10GE ethernet interface, and other high-speed data interfaces, and the InfiniBand interface is used for interaction of simulation data between servers with large data volume; the GE/10GE Ethernet interface is used for controlling interactive data transmission with small data volume. The resource pool 40 is further provided with a plurality of real network element devices such as a channel switching device 42, a router 43, and a switch 44.
The simulation management server 30 is provided with a management platform, the management platform includes a network real-time simulation management system, and the management platform implements configuration management of multiple functions through a control script. Specifically, the management platform uses the control script to implement configuration management of multiple functions, including virtualized resource allocation management recovery, network element device port protocol configuration in real topology, simulation server topology configuration parameter configuration simulation start, and the like. The invention can quickly construct simulation network topology in the simulation server cluster through script combination, start simulation, collect operation data, change topology, adjust protocol and change service. In addition, the configuration and execution of the simulation environment are completed through scripts, and the process is also a test environment building process of the NFV/SDN device and the information system 53; and after the simulation is started, running data is collected through the script, test parameters are changed, test items can be completed according to a test flow, and a complete test report is obtained. Because the invention manages the simulation hardware resource uniformly, the invention realizes that the script dynamically manages and configures the simulation topology of the network communication in the resource pool, collects the information, changes the scene, is beneficial to realizing the high-efficiency and rapid configuration of the complex network testing environment, automatically configures the scene and collects the testing information, and can greatly improve the testing efficiency of the network communication equipment and the information communication system; and the testing environment has higher fidelity, and can be used as a network target range to carry out network information safety related testing and attack and defense drilling.
How to implement the concatenation of the virtual network topology with the real network topology is described in detail below:
as shown in fig. 4, the network simulation system 52 is provided with two network simulators, and two computers run network simulation software respectively, so as to simulate a plurality of subnets to connect to the real network topology, and meanwhile, one computer is connected to the server of the information system 53, and the other computer is connected to the client virtual machine 54, so as to combine the real network and the virtual network into one network topology, and perform the simulation verification of the network multi-index.
As shown in fig. 5, a network simulator is provided in the network simulation system 52, and a computer runs network simulation software respectively, so as to simulate a plurality of subnets to connect to the real network topology, and meanwhile, the computer is connected to both the server of the information system 53 and the client virtual machine 54, and the real network and the virtual network together form a network topology to perform simulation verification of multiple network indexes.
As shown in fig. 6, two network simulators are provided in the network simulation system 52, and two computers run network simulation software respectively, so as to simulate a plurality of subnets and realize connection with the real network topology, wherein one end of one computer is connected to a first test device 41A to access the real network, the other end is connected to the real network topology, one end of the other computer is connected to a second test device 41B to access the real network topology, the other end is connected to the client virtual machine 54, and the first test device 41A or the second test device 41B may be a single-port meter or a multi-port meter, and both may be arbitrarily connected to the virtual network.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. A large-scale information communication network real-time simulation system comprises a desktop interactive computer, a simulation switch connected with the desktop interactive computer, a simulation management server connected with the simulation switch, and a resource pool connected with the simulation switch, wherein a real network element and a test device are arranged in the resource pool, and the system is characterized in that: the desktop interactive computer is used as a human-computer interactive interface for simulation of a user, the simulation switch is used for providing a switching function, and the simulation management server is a core part of the whole system and is responsible for distributing hardware resources of a simulation server cluster, deploying simulation network topology, deploying simulation service, deploying access of real equipment and a test instrument and meter and providing human-computer interactive interface service of a simulation network; the simulation switch is further connected with a simulation server cluster, the simulation server cluster comprises NFV/SDN equipment, a network simulation system and an information system, wherein the real network elements, the NFV/SDN equipment and the network simulation system together form a real network topology, the network simulation system is used for forming a virtual network topology, the information system serves as an information system server to respond to an access request of a client application, a client virtual machine is further arranged in the NFV/SDN equipment and the network simulation system, the client virtual machine requests to access a service of the information system to establish a connection penetrating through the whole network topology, the test equipment and the information system are both connected with the real network topology, and the real network topology is connected with the client virtual machine through the network simulation system, enabling a real network topology and a virtual network topology to jointly form a network topology, and performing simulation and verification of multiple indexes of the network, wherein the real network topology and the network simulation system and the client virtual machine are connected through semi-physical interfaces, an interface, connected with a computer running a network simulator, on an edge node of the real network topology is mapped to be an edge node of the virtual network topology formed by the network simulation system, an interface, connected with the edge node of the real network topology, on the computer running the network simulator is mapped to be another node of the virtual network topology, and an interface IP address, connected with the computer running the network simulator, on the edge node of the real network topology is the same as the IP address of the edge node of the virtual network topology, the interface IP address of the computer running the network simulator connected to the edge node of the real network topology remains the same as the interface IP address of the other node of the virtual network topology.
2. The large-scale information communication network real-time simulation system according to claim 1, wherein: the network simulation system is provided with a plurality of network simulators.
3. The large-scale information communication network real-time simulation system according to claim 1, wherein: and adding a static address resolution protocol list to the edge node of the real network topology.
4. The large-scale information communication network real-time simulation system according to claim 3, wherein: and binding an interface IP address connected with the edge node of the real network topology on the computer running the network simulator with a physical address of an interface connected with the edge node of the real network topology on the computer running the network simulator.
5. The large-scale information communication network real-time simulation system according to claim 1, wherein: the computer running the network simulator is the desktop interaction computer or the client virtual machine.
6. The large-scale information communication network real-time simulation system according to claim 1, wherein: the interfaces of the simulation switch comprise an InfiniBand interface, a GE/10GE Ethernet interface and other high-speed data interfaces.
7. The large-scale information communication network real-time simulation system according to claim 1, wherein: the simulation management server is provided with a management platform, the management platform comprises a network real-time simulation management system, and the management platform realizes configuration management of multiple functions through a control script.
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