What is a network fabric?
A network fabric is a mesh of connections between network devices such as access points, switches, and routers that forward data to its destination. “Fabric” refers to the physical wiring that makes up these connections but usually refers to a virtual mesh of virtualized connections automatically overlaid on top of a physical topology.
The physical or essential part of the fabric consists of switches, routers, and Wi-Fi devices. It provides a simple, scalable infrastructure for communication between network devices. The virtualized or overlay portion of the network fabric is used to transport user data.
The virtualized part of the structure is created by adding specific headers to packets. The network device interprets these headers and either blocks or forwards the packet. This conditional routing ensures that devices see only the relevant subset of the network.
Virtualization adds value to the network fabric. By virtualizing the base layer of your network, splitting it into multiple overlay networks, and optimizing them individually, you can use separate strategies for different needs. In addition, this structure has extensive policy-based control and automation mechanisms, allowing you to react to changes based on business requirements quickly.
