Virtual Storage-Area Network
A VSAN is a virtual storage-area network (SAN). A SAN is a dedicated network that interconnects hosts and storage devices primarily to exchange SCSI traffic. In SANs, you use the physical links to make these interconnections. A set of protocols runs over the SAN to handle routing, naming, and zoning. You can design multiple SANs with different topologies.
A SAN island refers to a completely physically isolated switch or group of switches that are used to connect hosts to storage devices. The reasons for building SAN islands include to isolate different applications into their own fabric or to raise availability by minimizing the impact of fabric-wide disruptive events. Figure 6-33 portrays VSAN topology and a representation ...
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