> # FC Interfaces Rx BB Credit

> Field | Description
> --- | ---
> Oper | The receive buffer-to-buffer credits configured for the operational port mode.
> Model | The BB_Credit model used by the FC-port. The alternate BB_Credit management model can be used in the arbitrated loop topology to manage the flow of frames between the two ports participating in the current loop circuit. Since this is a characteristic of a physical port, this is not applicable for Port Channel ports.
> Admin | The receive buffer-to-buffer credits configured for this port.
> Extended | The extended BB credits that can be configured on an FC port (in the range 256 through 4095). The acceptable value depends on the BB credit configuration of other ports on the module. This value can only be modified on modules that support the extended BB credit feature.
> AdminISL | The receive buffer-to-buffer credits configured for this port to be used if it is operating in xE_port mode.
> AdminFx | The receive buffer-to-buffer credits configured for this port to be used if it is operating in Fx mode.
> PerfBuffer Admin | The performance buffers configured for this port. These buffers in addition to the buffer-to-buffer credits are used to improve the performance of a port. If a value of 0 is set, then the module uses the built-in algorithm to calculate the number of performance buffers to be used.
> PerfBuffer Oper | The performance buffers presently operational on this port.
> Oper Rx | The maximum number of receive buffers available for holding Class 2, Class 3, Class F frames received from the peer Interconnect_Port.
> Oper Tx | The total number of buffers available for holding Class 2, Class 3, Class F frames to be transmitted to the peer Interconnect_Port.
> Current Rx | The current value of receive buffer-to-buffer credits for this port.
> Current Tx | The current value of transmit buffer-to-buffer credits for this port.
> BbScn Notify | Indicates whether the Buffer-to-buffer State Change Number (BB_SC_N) mode is enabled. If checked, BB_SC_N mode is enabled. If unchecked, BB_SC_N mode is disabled.

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