Fibre Channel Addressing
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Fibre Channel uses World Wide Names (WWN) and Fibre Channel IDs (FCID). WWNs are unique identifiers that are hardcoded into Fibre Channel devices. FCIDs are dynamically acquired addresses that are routable in a switch fabric. Fibre Channel ports are intelligent interface points on the Fibre Channel SAN. They are found embedded in various devices, such as an I/O adapter, array or tape controller, and switched fabric. Each Fibre Channel port has at least one WWN. Vendors buy blocks of WWNs from the IEEE and allocate them to devices in the factory.

WWNs are important for enabling Cisco Fabric Services because they have these ...

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