In today's cloud environments there are several additional attributes that become part of the network fabric.
Support for network and storage convergence
Support for virtualization, automation, and customization
Ease of network provisioning, configuration, and management
Very scalable, efficient, and high-performance fabric-based architectures can be built and deployed using open, interoperable and industry-accepted approaches. From high-density 10GbE to high-density 40GbE, to support for virtualization and convergence, as well as redundancy and multi-path capability, open industry-accepted solutions are gaining a foothold in building cloud-scale architectures.