Mar 18, 2013

What are the benefits of virtual networking?

VMWare is using technology from one of it's recent acquisitions to add virtual networking into its existing products. I don't really have any experience with virtual networks - What are the expected benefits of deploying a virtual network?


Hi stylor,


Accroding to me Virual networking provides enhanced network security. More over VLANs is cheaper than creating a router network and the most important of all Physical Layer transperancy. 

Here's an article that gives you a good general overview of virtual networking.


"A virtual network is a computer network that consists, at least in part, of virtual network links.

A virtual network link is a link that does not consist of a physical (wired or wireless) connection between two computing devices but is implemented using methods of network virtualization.
The two most common forms of network virtualization are protocol-based virtual networks, (such as VLANs, VPNs, and VPLSs) and virtual networks that are based on virtual devices (such as the networks connecting virtual machines inside a hypervisor). In practice, both forms can be used in conjunction.

Virtual LANs (VLANs) are logical local area network s (LANs) based on physical LANs. A VLAN can be created by partitioning a physical LAN into multiple logical LANs using a VLAN ID. Alternatively, several physical LAN's can function as a single logical LAN. The partitioned network can be on a single router, or multiple VLAN's can be on multiple routers just as multiple physical LAN's would be. A VLAN can be on a VPN.

A virtual private network (VPN) consists of multiple remote end-points (typically routers, VPN gateways of software clients) joined by some sort of tunnel over another network, usually a third party network. Two such end points constitute a 'Point to Point Virtual Private Network' (or a PTP VPN). Connecting more than two end points by putting in place a mesh of tunnels creates a 'Multipoint VPN'.

A VPLS (Virtual Private LAN Service) is a specific type of Multipoint VPN. VPLS are divided into Transparent LAN Services (TLS) and Ethernet Virtual Connection Services. A TLS sends what it receives, so it provides geographic separation, but not VLAN subnetting. An EVCS adds a VLAN ID, so it provides geographic separation and VLAN subnetting."

The greatest benefits are probably the rapid provisioning and speed with which you can deploy whatever you want. Here is an article that goes into a bit more depth about what a virtual network actually is

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