> # Cisco MDS 9134 Fabric Switch BB_Credit Buffers

> Table 14-11 lists the BB_credit buffer allocation for MDS 9134 Fabric Switches.

> Table 14-11 MDS 9134 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
> Maximum user-configurable BB_credit buffers | 64 | 61 | 61
> Minimum user-configurable BB_credit buffers |  | 2 | 1
> Default BB_credit buffers on 10-Gbps mode | 64 | 64 | 64
> Default BB_credit buffers on 4-Gbps mode | 64 | 16 | 16

> 1ISL = E port or TE port.

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