Function of the 0xFFFFFC Address in a Fibre Channel Fabric

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In Fibre Channel (FC) networks, the 0xFFFFFC address, also known as the Fabric Address or the Fabric Controller Address, is a special address that serves as the destination for fabric-wide control information. The main function of the 0xFFFFFC address is to provide a centralized point for managing and controlling the FC fabric.

When an FC device sends a message to the 0xFFFFFC address, it is broadcasted to all devices in the fabric. This allows the Fabric Controller to manage and control the entire fabric, including its topology, performance, and security. The Fabric Controller may also provide services such as zoning, which allows specific devices to communicate with each other while blocking other devices from accessing the same data.

The Fabric Controller is typically implemented as a dedicated device, such as a switch or a director, which provides a centralized point of control for the entire fabric. It is responsible for managing the fabric services, including routing, zoning, name services, and security. In addition, the Fabric Controller also monitors the performance of the fabric and performs diagnostic tests to identify and troubleshoot any issues.

In summary, the 0xFFFFFC address in a Fibre Channel fabric is used to provide a centralized point for managing and controlling the entire fabric. The Fabric Controller, which is typically implemented as a dedicated device, is responsible for managing the fabric services and monitoring the fabric's performance.