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Software Defined Networking


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A brief introduction to the world of Software Defined Networking.
It is a very revolutionary technology which can entirely change the face of network management, if implemented in a network.

Published in: Engineering
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Software Defined Networking

  2. 2. What is SDN ??? ● Software-defined networking (SDN) is an approach to computer networking that allows network administrators to manage network services remotely. ● This is implemented by seperating the control plane and data plane in a topology.
  3. 3. What does this mean?? -a foundational element for building SDN solutions First, let us understand openflow...
  4. 4. Data Path Controller Decoupled
  5. 5. Separate intelligence from datapath
  6. 6. Why SDN ??? ● Complexity – As the users of network grow rapidly, it has now become a challenging task to administer network in a dynamic enviornment. ● Inconsistent Policies – Rapid growth in demand of data center increase makes the traffic patterns unpredictable, for the IT people. ● Companies like Google, Facebook, Amazon, etc cannot configure their thousands of switches and servers manually, in such a dynamic network. ● And many more ...
  7. 7. Features of SDN: ● Dynamic ● Manageable ● Cost–effective ● Adaptable Suitable for the high-bandwidth, dynamic nature of today's applications
  8. 8. Request Processing by Remote Controller: ● Host make request to one of switch. ● Switch then forwards it to the remote controller. ● Depending on request, the controller decides whether to allow it or not. ● If yes, it makes an entry in the controller table and programs the switches which comes in the path for the request. ● As the service gets completed, it removes the entry from the controller table.
  9. 9. Network Configuration ● Link Aggregation - Connecting two physical links in order to create two logical links ● Firewall – Rerouting malicious host or protocol through a higher security link ● Providing Quality Of Service between two hosts or for a particular protocol ● In case of link failure, rerouting the traffic through a different path ● ...
  10. 10. Applications of SDN: ● Better network management. ● Complete utilization of bandwidth using link aggregation or by providing QoS. ● Saves the routing table calculation and prevent switches from running out of memory. ● Saves cost of many switches and routers.
  11. 11. Softwares for Simulation
  12. 12. MININET ● A network emulator ● Runs a collection of end-hosts, switches and links on a single Linux kernel ● Can send packets through what seems like a real Ethernet interface, with a given link speed and delay ● Provides various functionalities, like It shows that how host is connected to a switch and through which link. Shows the live host-switch links in the network. And many more ...
  13. 13. RYU Controller ● a component-based software defined networking framework. ● provides software components with well defined API ● Open Source Python controller – Supports OpenFlow 1.0, 1.2, 1.3.
  14. 14. References ● GitHub open source repository. ● Ryu mailing lists. ● SDN Lab (Discussion & error removal) ● Youtube (Mininet Tutorials) ● ●
  15. 15. Team Group-2 Name ID Abhijeet Singh Panwar 201351005 Shalinee Singh 201351024 Chirag Panpalia 201351001