Network virtualisation: what it is and why it matters

Networking virtualisation is a technology that abstracts networking functions from the underlying hardware. In doing so, it allows enterprises to optimise resource utilisation, enhance scalability and simplify network management. This decoupling of network services from underlying hardware often leads to better flexibility and efficiency.

Understanding network virtualisation

Network virtualisation involves the setting up of a virtual network that operates independently of the physical hardware. In such an abstraction, multiple virtual networks coexist on the same physical hardware, each with its own configurations and policies.

This allows deployment of applications and services without the constraints imposed by physical hardware limitations. Let’s examine these benefits more closely.

Benefits for enterprises

The adoption of network virtualisation offers several advantages:

• Enhanced resource utilisation: By abstracting network functions from hardware, enterprises can allocate resources dynamically, ensuring optimal utilisation and reducing wastage.
• Scalability: Virtual networks can be scaled up or down swiftly in response to changing business needs, providing agility in operations.
• Simplified management: Centralised control of virtual networks streamlines management tasks, reducing complexity and operational overhead.

A study by the European Telecommunications Standards Institute (ETSI) highlights that network functions virtualisation (NFV) contributes to a significant transformation in the telecommunications industry, compelling major network equipment manufacturers to offer virtualised versions of their products that run on industry-standard hardware.

Decoupling hardware dependencies

One of the core principles of network virtualisation is the separation of network services from physical hardware. This separation allows enterprises to deploy network functions on commodity hardware, reducing reliance on proprietary equipment and lowering capital expenditures. It also enables the use of software-defined networking (SDN) to programmatically manage network behaviour, further enhancing flexibility.

Major vendors offering network virtualisation solutions

Several leading companies provide network virtualisation solutions tailored for enterprise needs:

• VMware NSX: A comprehensive platform that enables the creation of entire networks in software, decoupled from the underlying hardware. It offers features like micro-segmentation and automation, enhancing security and efficiency.
• Cisco NFV Infrastructure (NFVI): Cisco’s solution supports NFV deployments by providing the necessary computing, storage and networking resources to run virtualised network functions. It is designed to support modern telecommunications networks.
• Microsoft Hyper-V: A native hypervisor that virtualises hardware resources, including processors, memory, storage and networking. Hyper-V is popular for its robust features and compatibility with Windows Server environments.
• 6WIND Virtual Accelerator: Provides high-performance virtual networks by leveraging fast path software and Data Plane Development Kit (DPDK) technologies, enabling efficient packet processing.

Network virtualisation stands as a transformative force in enterprise networking. As the technology continues to evolve, its widespread adoption will likely see it become a cornerstone of modern enterprise IT strategies.

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