Calculate the number of PFC frames required to enable full backpressure on an interface

Priority-based Flow Control (PFC) is a flow control mechanism based on priority. After the data center bridging (DCB) function is enabled on a switch and negotiation succeeds, the switch stops sending packets in the corresponding priority queue when it receives PFC frames.
Number of required PFC frames = Interface bandwidth/[512 x Time(n)]
Time(n) indicates the backpressure timer value. The unit is the time an interface uses to send 521 bits.

Other related questions:
Calculate the backpressure timer value of PFC frames
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