CN106254178B - network test platform NFVNTP based on NFV and test method thereof - Google Patents
network test platform NFVNTP based on NFV and test method thereof Download PDFInfo
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- CN106254178B CN106254178B CN201610627345.9A CN201610627345A CN106254178B CN 106254178 B CN106254178 B CN 106254178B CN 201610627345 A CN201610627345 A CN 201610627345A CN 106254178 B CN106254178 B CN 106254178B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
Abstract
The invention provides a network test platform NFVNTP based on NFV and a test method thereof, aiming at the problems that the existing network test platform does not have test fidelity, the large-scale and complex network test environment is technically or safely infeasible to construct, the cost is high, the period is long and the like. Based on NFVNTP, a large-scale network test environment with real function, credible performance and customizable scene can be constructed by using a specific NFV network component based on an open source code platform, and a tested object can be placed in a network loop, so that a real and credible network performance test result is obtained.
Description
Technical Field
the invention belongs to the field of network communication, and particularly provides a network test platform based on NFV and a design method thereof.
background
at present, the novel network application and the network equipment need to be thoroughly tested and evaluated before the novel network application and the network equipment are put into practical use. The construction of a real network environment, especially a large-scale complex network environment, is expensive, often has a long period which is not acceptable, and sometimes is not technically or safely feasible. For example, when a novel aerospace-ground integrated network is developed, it is not practical to construct a network test platform at the initial stage of development because the key technology for constructing the network is still in the development stage or the test may reveal key communication parameters. Therefore, providing a test platform with test fidelity in a laboratory environment becomes a key for promoting the development of advanced network technology, and has important theoretical significance and practical value. The authenticity of the test result provided by the platform, the compatibility with the network environment, the adaptability to various application scenarios, and the like are referred to herein as test fidelity. The platform with the test fidelity can really run the network protocol and provide the network function; can interface with the actual network equipment, make the agreement or apparatus under test locate in the particular network loop; meanwhile, the method has the characteristics of easy construction, low cost, safety, confidentiality, open interface and the like.
Network Function Virtualization (NFV) technology developed in recent years adopts Virtualization technology to implement Network Functions by software, and a plurality of virtualized Network Functions can coexist in general server Virtualization software in the form of virtual machines and can be installed or moved to any position in a Network as required without deploying new hardware devices. By making the network function software, NFV frees the network function from the constraints of dedicated hardware, bringing a lot of benefits to the communication operators: the cost for purchasing special hardware equipment (such as certain special network security equipment) with less use chances, high energy consumption, single function and high price is reduced; the period of introducing a new technology is shortened, so that the innovation of a network and the deployment of new services are accelerated; the complexity of managing a large number of hardware devices is reduced by automatic control, and the management cost is also reduced. Therefore, the key features that NFV has are ideally suited as a support technology for building network test platforms.
Disclosure of Invention
The invention provides an NFV-based Network Testing Platform (NFV based Network Testing Platform, NFVNTP) and a Testing method thereof, aiming at the problems that the existing Network Testing Platform does not have Testing fidelity, and the construction of a large-scale and complex Network Testing environment is technically or safely infeasible, high in cost, long in period and the like. Based on NFVNTP, a network test environment with real function, credible performance and customizable scene can be constructed by using a specific NFV assembly, and a tested object can be placed in a network loop, so that a real and credible network test result is obtained.
The technical scheme of the invention is as follows:
an NFV-based network test platform (NFVNTP), comprising: a core network and an edge network located around the core network;
the core network comprises one or more servers, the servers are mutually connected through Ethernet cards to achieve the scale of a network test platform, and the servers can support the operation of a Linux operating system, virtualization software and various network protocols;
the edge network is one or more enterprise networks and local area networks which are actually operated.
The server of the invention runs the open source virtualization software KVM in the Linux operating system, virtualizes the server into a plurality of virtual machines, and runs the virtualization network components on each virtual machine, so that each virtual machine has the capability of realizing equipment in a real network environment based on the NFV technology.
the server of the present invention communicates with other servers or edge networks through one or more multiport ethernet cards.
The virtualized network component of the present invention comprises: one or more of a virtualized routing component, a virtualized network performance component, a special network virtualization component, and a visual operations component, wherein:
the virtualized routing component is used for configuring the router and enabling the virtual router to form an end-to-end path based on a routing protocol; enabling the virtual machine to enter a router configuration mode through a zebra program, and deploying the Quagga routing software into the virtual machine;
The virtualized network performance component realizes the control of the network transmission performance based on the network simulation function software NetEm, and quantificationally customizes the network performance parameters;
The special network virtualization component virtualizes or simulates a network with special functions to generate the same influence on the transmission of the packet stream by calling the virtualized routing component and the virtualized network performance component and configuring corresponding performance parameters or compiling corresponding network protocols and configuring corresponding performance parameters;
The visual operation component customizes the NFVNTP environment through a graphic user interface module so as to facilitate operation.
In the virtualized network component of the present invention, the performance parameters include bandwidth, transmission delay, packet loss, packet jitter, out-of-order, and packet redundancy, among other parameters.
in the special network virtualization component, the network with special functions comprises one or more of a satellite network, a wireless network, a delay/disconnection tolerant network DTN, a sensor network and/or a submarine network.
an NFV-based network testing method comprises the following steps:
A. when testing the application program, respectively deploying and operating the tested application program in the edge networks at two sides of the network test platform;
B. And setting the core network deployed on the server as required network topology, routing and resource configuration according to the test requirements, and enabling the tested network application to run through the edge network and the core network.
the network test platform of the NFV passed by the network application of the invention sets a path to run, deploys a measuring program on a first virtual machine connected with an edge network, and collects performance parameters of the network application; and analyzing and processing the collected performance test data of the network application according to the requirement to obtain a performance evaluation result of the program to be tested.
an NFV-based network testing method comprises the following steps:
A. when testing developed network equipment, placing the tested network equipment in a network loop between an edge network and a core network, and connecting the tested network equipment with the edge network and the core network by using standard network interfaces respectively;
B. and setting the core network deployed on the server to be the required network topology, route and resource configuration according to the test requirement, and enabling the required network application to run through the core network.
The invention connects the network test device between the network edge and the interface of the network core in series, and the network application runs on the path of the network test platform passing through NFV; and collecting the network application performance test data, and analyzing and processing the collected performance data according to the requirements to obtain the performance evaluation result of the required network test equipment. The invention has the beneficial effects that:
the invention has the advantages that: (1) the NFVNTP provides test fidelity for tested objects such as network application programs and equipment based on a virtualization mode, and has the characteristics of easiness in construction, low cost, safety, confidentiality, opening of interfaces and the like; (2) the NFVNTP can virtualize or simulate a network with special functions, and can test the comprehensive effect of the tested objects and the network and a large-scale IP network; (3) the device to be tested can be actually placed in the NFVNTP loop, and the physical interface specification and the logic function of the device are actually tested; (4) the edge network is a real network and the core network is NFVNTP, and the mixed structure does not need to modify application programs of a server side and a client side; (5) when the edge network is the SDN, strong control capability on the network can be formed by writing a program on the controller; (6) NFVNTP has good wide area IP network performance characteristics.
Drawings
Fig. 1 is a schematic structural organization diagram of NFVNTP.
Fig. 2 is an architectural diagram of the NFVNTP.
fig. 3 is a schematic diagram of an environment test structure of a device under test data chain passing through NFVNTP.
Fig. 4 is a schematic structural diagram of an OpenFlow network interconnected via a wide area network.
Fig. 5 is a graph of the change in bandwidth of a video stream.
Detailed Description
The invention is further described below with reference to the figures and examples.
as shown in fig. 1, an NFV-based network test platform includes: a core network and an edge network located around the core network;
the core network comprises one or more servers, the servers are mutually connected through Ethernet cards to achieve the scale of a network test platform, and the servers can support the operation of a Linux operating system, virtualization software and various network protocols;
The edge network is one or more enterprise networks and local area networks which are actually operated.
The server of the invention runs an open source virtualization software KVM in a Linux operating system, virtualizes the server into a plurality of virtual machines, and runs a virtualization network component on each virtual machine, so that each virtual machine realizes the capacity of equipment in a real network environment based on NFV technology; the virtualized network component includes: one or more of a virtualized routing component, a virtualized network performance component, a special network virtualization component, and a visual operations component, wherein:
The virtualized routing component is used for configuring the router and enabling the virtual router to form an end-to-end path based on a routing protocol; enabling the virtual machine to enter a router configuration mode through a zebra program, and deploying the Quagga routing software into the virtual machine;
the virtualized network performance component realizes the control of the network transmission performance based on the network simulation function software NetEm, and quantificationally customizes the network performance parameters;
The special network virtualization component virtualizes or simulates the influence of a network with special functions on packet transmission by calling a corresponding network function module, compiling a corresponding network protocol or configuring performance parameters;
The visual operation component is used for customizing the NFVNTP environment through a graphic user interface module and simplifying operation.
In the specific implementation:
in order to evaluate certain data link network equipment in a sea-air environment, for example, when a certain airplane sails over the sea, the data link equipment carried by the airplane transmits information to a satellite by using a low-speed wireless channel, transmits the information to a satellite earth station through the satellite, and finally transmits the information to a control center through a land-based wired network. When the data link equipment needs to be upgraded, newly developed equipment needs to be tested, and the newly developed equipment can not be put into use formally until the stability and reliability of the newly developed equipment are determined. In the development process of the data link equipment, if repeated testing is carried out in a real environment, the overhead is huge and communication parameters are easy to leak. Therefore, it is of great significance to construct a network test platform with test fidelity for the network device based on the NFVNTP.
To test the network in the sea-air environment as shown in fig. 3, the following work is done: 1) end-system hosts H1 and H2 adopt Lenovo T440p portable machines and are respectively arranged at two sides of an end-to-end path; 2) the tested equipment is data link equipment and is arranged in a tested network loop; 3) a plurality of BGP routers are set on the NFVNTP, and a core network is divided into a plurality of Autonomous Systems (AS). The virtual routers r4, r5, r6 are configured AS BGP routers, and the entire network is divided into three ASs. One of the AS is used for simulating a satellite network, r2 uses NetEm to simulate a wireless channel with low speed and high packet loss rate, r4 uses NetEm to simulate a satellite channel with medium bandwidth, high time delay and certain packet loss rate, and other AS simulate a high-speed bandwidth land-based network. The data chain equipment to be tested is directly connected with the NFVNTP on the universal server, namely, the data chain equipment to be tested is connected with the virtual router r2 through a physical interface eth1 of the server. The satellite network is mapped to the server physical interface eth0 through the virtual router R1 and then connected to the physical router R1 in the LAN 1. Where LAN1 represents the control center network and H1 represents the information presentation terminal.
examples
the design of the embodiment realizes that two OpenFlow networks are interconnected with a prototype system through a wide area network, and the prototype system is tested in the experimental environment shown in fig. 4. SDN provides a novel system structure for network innovation, an OpenFlow network is a network conforming to the standard of a southbound interface of SDN, and the working mode of separating a control plane and a data plane is highly popular. It is a widely adopted way to interconnect multiple OpenFlow subnets at the edge of the network by using an IP core network, and we interconnect two OpenFlow subnets by using NFVNTP.
Firstly, 2 OpenFlow switches with the model number of Pica8P3297, 2 Lenovo T4900v PCs running Linux as POX controllers and 4 Windows hosts H11, H12, H21 and H22 are adopted to form two OpenFlow subnets in a mode shown in FIG. 4. NFVNTP still employs a wide area network configured the same as section 6.1. One port of each of the two OpenFlow switches is connected to one physical interface of the universal server, that is, port 1 of OFS1 is connected to the virtual router r1 through the server eth1 interface; the OFS2 port 1 is connected to the virtual router r2 through the server eth0 interface.
to test this hybrid network, we worked as follows: 1) and writing related control programs on SDN controllers C1 and C2 respectively to establish flow table entries for communication hosts to the wide area network router. 2) The VLC server is configured on host H11 to continuously play video using HTTP protocol, while the VLC clients are configured on hosts H12, H21, and H22 to access the video being played on H11, respectively. 3) And installing Wireshark at the client host, and capturing the communication process of the video stream. Fig. 5 is a time-varying video stream curve, and these three traffic curves respectively show the time-varying video traffic when 1, 2, and 3 clients access the video server at the same time.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (8)
1. A network test platform NFVNTP based on NFV is characterized by comprising: a core network and an edge network located around the core network;
The core network comprises one or more servers, the servers are mutually connected through Ethernet cards to achieve the scale of a network test platform, and the servers can support the operation of a Linux operating system, virtualization software and various network protocols;
The edge network is one or more enterprise networks and local area networks which are actually operated;
The server runs an open source virtualization software KVM in a Linux operating system, virtualizes the server into a plurality of virtual machines, and runs a virtualization network component on each virtual machine, so that each virtual machine has the capability of realizing equipment in a real network environment based on the NFV technology;
The virtualized network component includes: one or more of a virtualized routing component, a virtualized network performance component, a special network virtualization component, and a visual operations component, wherein:
the virtualized routing component is used for configuring the router and enabling the virtual router to form an end-to-end path based on a routing protocol; enabling the virtual machine to enter a router configuration mode through a zebra program, and deploying the Quagga routing software into the virtual machine;
The virtualized network performance component realizes the control of the network transmission performance based on the network simulation function software NetEm, and quantificationally customizes the network performance parameters;
The special network virtualization component virtualizes or simulates a network with special functions to generate the same influence on the transmission of the packet stream by calling the virtualized routing component and the virtualized network performance component and configuring corresponding performance parameters or compiling corresponding network protocols and configuring corresponding performance parameters;
The visual operation component customizes the NFVNTP environment through a graphic user interface module so as to facilitate operation.
2. the NFV-based network test platform NFVNTP of claim 1, wherein the server communicates with other servers or edge networks through one or more multiport ethernet cards.
3. the NFV-based network test platform, NFVNTP, of claim 1, wherein the performance parameters in the virtualized network element include bandwidth, transmission delay, packet loss, packet jitter, out-of-order, and packet redundancy.
4. The NFV-based network test platform NFVNTP of claim 1, wherein the special network virtualization component comprises one or more of a satellite network, a wireless network, a delay tolerant network DTN, a sensor network, and/or a water network.
5. An NFV-based network testing method applying the NFV-based network testing platform NFVNTP of any one of claims 1 to 4, characterized in that it comprises the following steps:
A. when testing the application program, respectively deploying and operating the tested application program in the edge networks at two sides of the network test platform;
B. And setting the core network deployed on the server as required network topology, routing and resource configuration according to the test requirements, and enabling the tested network application to run through the edge network and the core network.
6. The NFV-based network testing method of claim 5, wherein: setting a path for a network test platform of NFV (network virtualization) through which a network application passes to operate, deploying a measurement program on a first virtual machine connected with an edge network, and collecting performance parameters of the network application; and analyzing and processing the collected performance test data of the network application according to the requirement to obtain a performance evaluation result of the program to be tested.
7. an NFV-based network testing method applying the NFV-based network testing platform NFVNTP of any one of claims 1 to 4, characterized in that it comprises the following steps:
A. When testing developed network equipment, placing the tested network equipment in a network loop between an edge network and a core network, and connecting the tested network equipment with the edge network and the core network by using standard network interfaces respectively;
B. And setting the core network deployed on the server to be the required network topology, route and resource configuration according to the test requirement, and enabling the required network application to run through the core network.
8. The NFV-based network testing method of claim 7, wherein: connecting network test equipment in series between interfaces of a network edge and a network core, operating the equipment, and operating a network application on a path of a network test platform passing through NFV; and collecting the network application performance test data, and analyzing and processing the collected performance data according to the requirements to obtain the performance evaluation result of the required network test equipment.
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| CN109308210B (en) * | 2018-09-13 | 2021-11-26 | 中国人民解放军陆军工程大学 | Method for optimizing NFV forwarding service chain performance on multi-core server |
| CN110247827B (en) * | 2019-07-25 | 2020-02-11 | 浙江鹏信信息科技股份有限公司 | NFV network element full-surrounding test method and device based on digital twin technology |
| CN110505118B (en) * | 2019-08-20 | 2021-11-23 | 内蒙古大学 | Personal area network experimental bed and implementation and test method thereof |
| CN110636137B (en) * | 2019-10-14 | 2022-06-17 | 河海大学常州校区 | Cluster-based NFV service chain optimization method in ocean view monitoring network |
| CN113055218B (en) * | 2019-12-29 | 2022-08-05 | 中国移动通信集团浙江有限公司 | Redundancy evaluation method and device for NFV network and computing equipment |
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