> # Cisco MDS 9148 Fabric Switch BB_Credit Buffers

> Table 14-10 lists the BB_credit buffer allocation for 48-port 8-Gbps Fibre Channel switches.

> Table 14-10 48-Port 8-Gbps Fabric Switch BB_Credit Buffer Allocation
> BB_Credit Buffer Allocation Type | BB_Credit Buffers Per Port Group | BB_Credit Buffers Per Port
> --- | --- | ---
> | ISL1 | Fx Port
> Default BB_credit buffers | 128 | 32 | 32
> Maximum configurable BB_credit buffers on 8-Gbps mode | 128 | 125 | 125

> 1ISL = E port or TE port.

> The following considerations apply to BB_credit buffers on 48-port 8-Gbps Fabric Switches:

> - BB_credit buffers can be configured from a minimum of 1 buffer to a maximum of 32 buffers per port when the ports are in F or FL mode.
> - BB_credit buffers can be configured from a minimum of 2 buffers to a maximum of 32 buffers per port when the ports are in E or TE mode.

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