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Deploying a SAN based on the Cisco MDS 9000 Series has provided Cisco with tremendous benefits. The IT SANs are now consolidated, but have retained fabric isolation through the employment of Virtual SANs (VSANs). The entire storage network infrastructure is manageable from anywhere, and with enhanced authentication and authorization capabilities. Cisco IT can use VSANs to scale the environment when desired without deployment of additional hardware, and can extend those VSANs without waiting for additional intracampus fiber or WAN capacity by using Enhanced ISLs (EISLs) to transparently trunk multiple VSANs over single FCIP, Fibre Channel links, or port channels.
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