Fibre Channel Flow Control
Flow control ensures that the transmitter sends data only at a speed that the receiver can receive it. Fibre Channel uses credit model. Each credit represents the capacity of the receiver to receive a Fibre Channel frame. If the receiver awards the transmitter a credit of 3, the transmitter may only send the receiver three frames. The transmitter may not send further frames until the receiver has acknowledged the receipt of at least some of the transmitted frames.
FC-2 defines two mechanisms for flow control: end-to-end flow control and link flow control (see Figure 6-25). In end-to-end flow control, two end devices ...
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