What is Open vSwitch (OVS)?

Open vSwitch (OVS) is indeed a multi-layer software switch that is designed to enable network virtualization and can be used in conjunction with various virtualization technologies, such as hypervisors. Being licensed under the Apache 2.0 license allows for broad usage and modification, supporting both development and deployment in various environments.

This flexibility makes OVS a critical component in software-defined networking (SDN) and cloud computing architectures, where it effectively manages the flow of data across virtualized environments. It can operate at multiple layers, including layer 2 (data link layer) for Ethernet frames and layer 3 (network layer) for IP packets, providing functions typical of both switches and routers.

The choice of OVS as a software-based solution highlights its ability to be integrated into automated and programmable networks, contrasting sharply with hardware switches that are typically static and limited to their physical capabilities. This software nature allows for dynamic configuration, management, and scaling within cloud infrastructures, making OVS a versatile tool for modern networking needs.