To do before the project used the SDN, they know their role, but it is not particularly familiar, especially to sum up today at the relevant knowledge points:
1. SDN typical architecture which is divided into three layers
Divided into application layer , control layer , and the infrastructure layer ;
2. The key point is that SDN technology
Control plane and data plane ;
It has three characteristics on 3. SDN nature?
Control and forwarding separation , device resource virtualization , as well as common hardware and software programmable ;
4. The development of cloud computing in time virtualization technology based;
5. What is the nature of network virtualization? How to meet the different needs of various applications for networks
To be able to abstract the underlying network physical topology ;
Capable of logically network resource fragmentation or integrated;
6. SDN meaning
SDN is to weaken the significance of the role of the underlying infrastructure - the software can be reconfigured in real time and programming;
ADDC
What 7. SDN architecture is the core component
The controller;
8. From the point of view SDN applications, SDN commercial focus first phase of what is
data center;
9.
In the new ecosystem, the lowest level architecture exchange equipment need only provide the most basic and simple functions
SDN suitable for cloud computing providers and the face of significantly expanded business workloads
SDN forwarding and control separated architecture may be such that the network equipment general, simplified
SDN technology enables centralized control and flexibility of cloud-aware applications
10. SDN network, the network device only purely responsible for what?
Maintain the network topology;
11. Description of technical advantages SDN:
- Provide a unified view of the network structure: a unified view of the entire network architecture implementation, which simplifies the configuration, management, and optimization.
- High efficiency: centralized traffic engineering enables us to effectively adjust the end of the flow path, so as to achieve high utilization of network resources;
- Quick fault repair: link, a node failure can achieve a quick fix. And the system capable of rapid polymerization of network resources, and an equal distribution of some network behavior can be predicted;
- Smooth upgrade: forwarding and control plane / data plane separation can be done while ensuring smooth upgrade software data loss or no performance degradation;
- Elastic computing: large-scale computing, path analysis are integrated in the sub-controller, completed by the latest server;
12. DESCRIPTION OpenFlow and SDN and Differences
- OpenFlow achieved thought SDN programmable network, represents the SDN prototyping and deployment of technologies examples, but the overall architecture view SDN, OpenFlow a communication protocol specific to the control plane and data plane. OpenFlow is a protocol configuration of network switches, as a bridge between the two, the process similar to that used API.
- The SDN is a term describing the internal network infrastructure programmable interface, this interface allows configuration of the network services highly automated.
13. The current which is mainly used in the field of SDN
Data center network, the interconnection between data centers, government and enterprise networks, telecommunications network operators, Internet companies and other service deployment.
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