Cloud Computing and Networking

Introduction to Cloud Networking

• Cloud computing has revolutionized networking.
• Traditional physical routers, switches, and devices are replaced by virtualized networks in the cloud.

Software-Defined Networking (SDN)

• SDN transforms physical networking devices (switches, routers, firewalls) into software-based platforms.
• These platforms allow for a virtualized cloud-based networking environment.

Layers of SDN

1. Infrastructure Layer (Data Plane):
   • Responsible for packet forwarding, trunking, encrypting, and network address translation.
   • Operates at the packet level for data-forwarding decisions.
2. Control Layer (Control Plane):
   • Contains dynamic routing protocols, forwarding tables, and network address translation tables.
   • Provides references for the data plane to forward traffic.
3. Application Layer (Management Plane):
   • Manages access and configuration of devices via APIs, SSH, or graphical interfaces.
   • Facilitates device management.

Application of SDN

• SDN can be applied to any infrastructure device such as switches, routers, or firewalls.
• Data Plane: Traffic forwarding between interfaces is managed.
• Control Plane: Manages tables and forwarding structures.
• Management Plane: Device management through console ports or management interfaces.

Benefits of SDN

• Provides modular layers for networking, allowing for extension and creation of new devices.
• Enables communication solely between specific layers (data plane, control plane).
• Facilitates dynamic routing and table creation at the control layer.
• Management is done through secure interfaces like SSH, SNMP, or APIs.
• Creates a modular architecture for software-based network devices.

Conclusion

• SDN enables deployment and use of virtualized network devices in cloud environments.
• Provides a standard, modular approach to networking in the cloud.