general it Virtual Fabric
Fabric Virtualization & emulex Products As large enterprise users deploy extensive storage networks, they are confronted with a number of limitations. Some of them are hard limitations, such as the maximum of 239 switches in a given fabric implemented in the Fibre Channel protocol and switches. Others appear progressively, such as decreased fabric service level as device discoveries and fabric reconfigurations take more time and affect more users. In addition, resources are deployed and managed based on locations, as opposed to business needs .
In response to these challenges, the Fibre Channel industry devised virtual fabrics, which overcome these limits by enabling configuration of logical, or “virtual” SANs, which can be sized, tailored and managed to business needs, and effectively isolate potentially disruptive fabric events.
Emulex host bus adapters transparently support connection into virtual fabrics, enabling co-hosted applications to be configured and operate within separate virtual fabrics. The latest generation LightPulse Virtual HBAs bring virtual fabric integration to the next level, by enabling