If you need to consolidate resources on Oracle's Sun servers, consider building virtual networks. You can achieve better utilization of the available resources by consolidating various applications on a few servers. You can then use virtual networking to provide connectivity between the applications.
Consolidators at ISPs, telecommunication companies, and large financial institutions can consolidate their servers because of the following hardware resources:
Powerful NICs with substantial bandwidth and hardware support, for example support for NIC rings and virtual functions (VFs)
Powerful physical machines with greater random access memory (RAM) and central processing units (CPUs)
You can replace many systems with a single system that has multiple zones or virtual machines, without significantly losing separation, security, and flexibility.
For a demonstration of the benefits of network virtualization, see Consolidating the Data Center With Network Virtualization.