Software Defined Network (SDN)
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This document discusses software defined networks (SDN). SDN separates the network control plane from the data plane, allowing a control plane to control multiple devices. The SDN architecture has three layers - the infrastructure layer consists of switches and routers that collect network status and process packets, the control layer bridges the application and infrastructure layers using a high-level language and network status information, and the application layer offers services through the control layer like load balancing and security. OpenFlow is a protocol that exchanges messages between controllers and switches to implement SDN functionality. SDN provides benefits like improved performance, flexibility, and reduced costs compared to traditional networks.
Software Defined Network (SDN)
- 1. Software Defined Network (SDN) ENG AHMED AYMAN FAHMY
- 2. outline Introduction Traditional Networks Disadvantages of traditional networks Definition of Software-Defined Networking (SDN) Architecture of SDN SDN layers Open flow protocol Advantages and disadvantages of SDN conclusion 2
- 3. Introduction 5G networks is going to be designed to be open, more flexible, and able to evolve more easily than the traditional networks. They will be able to provide convergent network communication across multi-technologies networks. It will provide open communication system to deal with satellite, mobile network, clouds, more and more networks so it will not be based on traditional routing and switching technologies 3
- 4. Traditional Networks Adjacent Router Router Management plane Configuration / CLI / GUI Static routesControl plane OSPF Neighbor table Link state database IP routing table Forwarding table Data planeData plane Control plane OSPF Adjacent Router Data plane Control plane OSPF Routing Switching managementmanagement BGP EIGRP RIP 4
- 5. Disadvantages of traditional networks Manual configuration Error-prone Low performance Time consuming Limit innovation Difficult troubleshooting High cost 5
- 6. Software-Defined Networking (SDN) Definition It is the physical separation of the network control plane from the Data plane, and where a control plane controls several devices. 6
- 8. Infrastructure Layer It consists of switches, routers, load balancers, ….. It is responsible for Collect network status. processing packets. 8
- 9. Control Layer Global View Rules Policy Network status Network status Sync Network status collect High level language Rules update Control layer It bridges the application layer and the infrastructure layer. It consists of four main components High level language Rules update process Network status sync. Network status collect 9
- 11. Application Layer 11 SDN application can access global network view through northbound interface of controllers. It can offers plat form as a service (PAAS) as: Load balancing Boundless roaming Network security Network maintenance
- 12. Open flow protocol 12 Intermediate between control layer and infrastructure. It is protocol to exchange messages between the controller and open switches through (south-bound interface)
- 13. Open flow protocol (cont.) 13
- 14. Advantages and disadvantages of SDN Advantages Improve performance Encourage innovation Automated configuration High flexibility Low cost Management is simple Disadvantages Single point of Failure. Single point of Attack. 14
- 15. SDN Threats Distributed denial of service attack (DDOS). Data forging. Identity spoofing Traffic diversion Memory scraping 15
- 16. conclusion SDN is the main component of providing faster and more reliant base for 5G wireless networks. The 5G network will contain a lot of devices, applications and technologies so SDN will enhance the configuration, optimize the performance. It will provide real time control of the network based on the instantaneous network status information collected by its layer. 16
- 17. “ ” Thank you 17
Editor's Notes
- #12: It can implement strategies to manipulate the underplaying physical network through the high level language provided by the control layer.
- #13: Most of modern routers and switches contain flow table for essential routing func. Like routing, subneting, FW protection and statistical analysis. In open flow switches each entry has Header, Action and statistics