|Place of Origin:||China|
|Certification:||CCC, CE, RoHS|
|Minimum Order Quantity:||1 SET|
|Packaging Details:||Outer Carton plus Inner Foam|
|Delivery Time:||1-3 Working Days|
|Payment Terms:||L/C, D/A, D/P, T/T, Western Union, MoneyGram|
|Supply Ability:||100 sets per month|
|SDN:||Is Software Defined Network Technology||SDN Advantage:||High Utilization, Quick Repair, Smooth Upgrade|
|SDWAN:||Software-defined Wide Area Network||Benefit:||High Performance Architecture|
|Application:||Data Center Network||NetTAP® Technology:||Data Masking, Filtering, Deduplication, Slicing, Etc.|
network traffic control visibility
NetTAP® SDN Technology - Innovative Application of Network Traffic Control Visibility Part 1
The principle of SDN Technology
Software Defined Network (SDN) is a new Network innovation architecture proposed by Clean State Research Group of Stanford University. It can define and control the Network in the form of Software programming. It has the characteristics of separation of control plane and forwarding plane and open and programmable.
The Development of SDN Technology
It has been more than 10 years since the concept was put forward, continuous engineering practice and the extensive application of SDN technology and its various branch technologies in various industries. In today's data center, WAN, transmission and other fields, SDN technology and its technical ideas have been generally blossoming and bearing fruit, and become the basis of intelligent and intentional network in the future.
The Core Advantage of SDN Technology
Network simplification: Simplifies configuration, management, and optimization by providing a unified view of the network architecture and a unified view of the entire network architecture.
High utilization: Centralized traffic engineering enables us to effectively adjust the end-to-end traffic path so as to achieve efficient utilization of network resources.
Quick failure repair: quick repair can be achieved for both link and node failures. Moreover, the system can quickly aggregate network resources, realize equal distribution, and predict some network behaviors.
Smooth upgrade: The separation of the control plane and the forward/data plane allows for smooth software upgrades without data packet loss or performance degradation.
Elastic computation: the large-scale computation and path analysis are integrated in the sub-controller and done by the latest generation of servers.
What SDN does is to separate the control over the network equipment and manage it by a centralized controller without relying on the underlying network equipment, thus masking the differences between the underlying network equipment. While control is completely open, users can customize any network routing and transmission rule policy they want to implement, making it more flexible and intelligent. After the TRANSFORMATION of SDN, there is no need to repeatedly configure the routers of each node in the network. The devices in the network are automatically connected, only need to be defined simple network rules when they are used. Therefore, if the protocol built into the router does not meet the user's needs, it can be modified programmatically to achieve better data exchange performance. So, for network equipment, the users can like upgrade, install the software to modify the network architecture, expansion and satisfy the user to adjust the network architecture, or the need to upgrade, and the underlying hardware, such as switches, routers, you do not need to replace, save a lot of cost at the same time, the network architecture of iteration cycle will be shorten.
Application of SDN Technology in Current Network
Data Center Network
The data plane and control plane of the traditional network equipment are separated, and the centralized controller is used to manage and configure various network equipment with standardized interface. The programmable nature of the network brought by this architecture makes the design, management and use of network resources more possible, thus facilitating the innovation and development of the network. Therefore, control and forwarding separation, logic centralized control and open network programming API are regarded as the three main characteristics that SDN differs from traditional network technology. It is these characteristics that enable SDN to well meet the use requirements of data center network:
(1) High scalability and network resource utilization: Through centralized management of forwarding publication, Controller can control the size and direction of traffic in each link of the network in real time, thus realizing virtual management of network bandwidth resources and network functional elements. Computing, storage and network all realize virtualization control, making network expansion no longer dependent on network architecture. From the extensive network module to the fine-grained resource pool expansion, the network expansibility and resource utilization ratio can be greatly improved.
(2) Support virtual machine migration and unified operation and maintenance: As Controller can control the flow direction of traffic in the network, virtual machine migration is easy to implement as it is only to modify the forwarding items sent to the switch. At the same time, SDN, VM Service Manager (VCenter) and IDC network management platform all adopt centralized management architecture, which is easy to integrate and realize highly automatic unified management. Among them, SDN Controller is mainly used to realize the centralized management and control of network devices (including vSwitch residing in the server).VM service manager is mainly used for VM management, including VM creation, deployment and migration, etc. The IDC management platform is mainly used to realize the overall coordination and control, complete the coordination between VM service manager and SDN controller, and realize the unified coordination and control of computing resources, storage resources and network resources in the data center.
(3) Support for multi-service and multi-tenant: SDN realizes network resource virtualization and traffic programmability, so it can flexibly build multiple independent business hosting networks on fixed physical networks (as shown in the figure below) to meet the requirements of multi-service and multi-tenant.
SDWAN, software-defined Wide Area network (WAN), is a service formed by applying SDN technology to wan scenarios, which is used to connect enterprise networks, data centers, Internet applications and cloud services of a wide geographical scope.
As SD-WAN is a technology-driven application, there is no unified definition in the industry, and the industry analysis and consulting agencies such as IDC and Gartner have different definitions. In comparison, the definition proposed by SDxCentral can simply reflect the core idea of SD-WAN, that is, "SD-WAN is a service formed by applying SDN technology to WAN scenarios, which is used to connect enterprise networks with a wide geographical range, including enterprise branches and data centers.
SD-EN (SDN Based Enterprise Network) focuses on the WAN connection on the user side and provides efficient SDN-based solutions for the connection of Enterprise headquarters and branches across wide area networks. DataCenter Interconnection SD-DCI (SDN based DataCenter Interconnection), refers to the movement of SDN-based solutions between multiple data centers in an enterprise, or between corporate offices and data centers. Cloud Interconnection SD-CX (SDN Based Cloud Exchange) pays more attention to WAN connection on the application side, providing efficient SDN-based solutions for public Cloud, private Cloud and increasingly rich hybrid Cloud applications.
T - SDN (Transmission SDN)
The traditional optical network is based on OTN interface with fixed rate, fixed spectrum interval of optical layer and layer by layer separation control. The newly increased bandwidth is basically predicted by rolling planning, and the business scheduling is mainly realized by ODUk cross scheduling of OTN equipment, with low efficiency. By introducing SDN delivery, the main values are:
It realizes the evolution of transmission network from "artificial static network management configuration" to "real-time dynamic intelligent control", improves the service opening speed, and simplifies the network configuration, operation and maintenance.
To realize the unified control and management of multi - vendor equipment and multi - layer multi - domain network.
By providing new network capability and open northbound interface, business innovation capability such as intelligent dedicated line and virtual transmission network can be realized quickly.
IBN (Network Based on Intention)
IBN is a closed-loop network architecture that can be built and operated based on human business intentions under the condition of mastering its "holographic state". Traditional networks rely on humans to input specific policy execution commands. In IBN, instead of typing policy commands directly, a human would enter the desired "business intent," which is, "I want the network to reach a certain situation." The network will automatically translate and complete subsequent operations. After that, the network needs to verify the matching between the actual network state and the expected network state of the business intention in real time to form a continuous closed-loop control process. To maintain this closed-loop process, the network must be able to obtain its own global real-time state, which we call "holographic state".
SDN technology is the implementation basis and technical means of IBN (intent-based intelligent network). Based on the flexible programmable and automatic control capability of SDN, SDN technology is used to support and realize the business intention of people in IBN network. Therefore, SDN technology is one of the solid foundations of IBN network.
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