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SOFTWARE DEFINED NETWORKS
EVOLVING NETWORK REQUIREMENTS
• Increased Bandwidth and Speed
• Edge Computing Integration
• Enhanced Security Measures
• Support for Remote Work and Collaboration
• Adoption of Software-Defined Networking (SDN)
ADOPTION OF SDN
• SDN adoption allows organizations to dynamically allocate resources, automate
network configuration, and respond rapidly to changing requirements,
optimizing overall network performance.
• Networks must support low-power, low-latency communication protocols
suitable for IoT devices, and implement effective device management and
security mechanisms.
WHAT IS SDN?
• SDN stands for Software Defined Network which is a networking architecture
approach. It enables the control and management of the network using software
applications. Through Software Defined Network (SDN) networking behavior of
the entire network and its devices are programmed in a centrally controlled
manner through software applications using open APIs.
•
VARIOUS PLANE INVOLVED IN SDN
• Data Plane
• Control Plane
DATA PLANE
• All the activities involving as well as resulting from data packets
sent by the end-user belong to this plane.
This includes:
• Forwarding of packets.
• Segmentation and reassembly of data.
• Replication of packets for multicasting.
CONTROL PLANE
• All activities necessary to perform data plane activities but do
not involve end-user data packets belong to this plane. In other
words, this is the brain of the network. The activities of the
control plane include:
• Making routing tables.
• Setting packet handling policies.
WHY IT IS IMPORTANT?
• Better Network Connectivity
• Better Security
• Better Deployment of Applications
• Better Control with High Speed
SDN USECASES
• Data Center Networking
• Campus Networking
• Wide Area Networking
• Network Slicing for 5G
• IoT (Internet ofThings)
• Security Policy Enforcement
• Cloud Networking
INFRASTRUCTURE LAYER:
• The infrastructure layer is the bottom layer of the SDN
architecture, also known as the data plane. It consists of physical
and virtual network devices such as switches, routers, and
firewalls that are responsible for forwarding network traffic
based on the instructions received from the control plane.
CONTROL LAYER
• The control layer is the middle layer of the SDN architecture,
also known as the control plane. It consists of a centralized
controller that communicates with the infrastructure layer
devices and is responsible for managing and configuring the
network.
APPLICATION LAYER
The application layer is the top layer of the SDN architecture and is
responsible for providing network services and applications to end-users.
This layer consists of various network applications that interact with the
control layer to manage the network.

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Software Defined Networks - Unit -1- class lecture notes.pdf

  • 2. EVOLVING NETWORK REQUIREMENTS • Increased Bandwidth and Speed • Edge Computing Integration • Enhanced Security Measures • Support for Remote Work and Collaboration • Adoption of Software-Defined Networking (SDN)
  • 3. ADOPTION OF SDN • SDN adoption allows organizations to dynamically allocate resources, automate network configuration, and respond rapidly to changing requirements, optimizing overall network performance. • Networks must support low-power, low-latency communication protocols suitable for IoT devices, and implement effective device management and security mechanisms.
  • 4. WHAT IS SDN? • SDN stands for Software Defined Network which is a networking architecture approach. It enables the control and management of the network using software applications. Through Software Defined Network (SDN) networking behavior of the entire network and its devices are programmed in a centrally controlled manner through software applications using open APIs. •
  • 5. VARIOUS PLANE INVOLVED IN SDN • Data Plane • Control Plane
  • 6. DATA PLANE • All the activities involving as well as resulting from data packets sent by the end-user belong to this plane. This includes: • Forwarding of packets. • Segmentation and reassembly of data. • Replication of packets for multicasting.
  • 7. CONTROL PLANE • All activities necessary to perform data plane activities but do not involve end-user data packets belong to this plane. In other words, this is the brain of the network. The activities of the control plane include: • Making routing tables. • Setting packet handling policies.
  • 8.
  • 9. WHY IT IS IMPORTANT? • Better Network Connectivity • Better Security • Better Deployment of Applications • Better Control with High Speed
  • 10. SDN USECASES • Data Center Networking • Campus Networking • Wide Area Networking • Network Slicing for 5G • IoT (Internet ofThings) • Security Policy Enforcement • Cloud Networking
  • 11.
  • 12. INFRASTRUCTURE LAYER: • The infrastructure layer is the bottom layer of the SDN architecture, also known as the data plane. It consists of physical and virtual network devices such as switches, routers, and firewalls that are responsible for forwarding network traffic based on the instructions received from the control plane.
  • 13. CONTROL LAYER • The control layer is the middle layer of the SDN architecture, also known as the control plane. It consists of a centralized controller that communicates with the infrastructure layer devices and is responsible for managing and configuring the network.
  • 14. APPLICATION LAYER The application layer is the top layer of the SDN architecture and is responsible for providing network services and applications to end-users. This layer consists of various network applications that interact with the control layer to manage the network.