While virtualization enables a lighter and more flexible IT environment, that environment still includes many physical elements. Building a network that spans both physical servers and virtual machines with consistent capabilities demands a new architectural approach to designing and building the IT infrastructure.
A direct consequence of increasing virtual-server deployments is the explosion of virtual machines. With new processing architectures, IT teams must anticipate running 10-20 or more virtual machines per server – a significant increase in the number of network elements to be managed. This kinetic pace of virtualization will undoubtedly continue, further accelerating VM sprawl as faster and denser multicore CPUs become the norm in physical servers. And the fact that every physical server that hosts VMs has a virtual switch means a 20-40x increase in the amount of items that IT administrators must oversee.