> # Default Settings

> Table 13-12 lists the default settings for Generation 2 interface parameters.

> Table 13-12 Default Generation 2 Interface Parameters
> Parameter | Default
> --- | ---
> 48-Port 4-Gbps Switching Module | 24-Port 4-Gbps Switching Module | 12-Port 4-Gbps Switching Module | 4-Port 10-Gbps Switching Module
> Speed mode | auto1 | auto1 | auto1 | auto2
> Rate mode | shared | shared | dedicated | dedicated
> Port mode | Fx | Fx | auto3 | auto4
> BB_credit buffers | 16 | 16 | 250 | 250
> Performance buffers | – | – | 1455 | 1455

> 1Auto speed mode on the 4-Gbps switching modules enables autosensing and negotiates to a maximum speed of 4 Gbps. 2The 4-port 10-Gbps switching module only supports 10-Gbps traffic. 3Auto port mode on the 12-port 4-Gbps switching module interfaces can operate in E port mode, TE port mode, and Fx port mode. 4Auto port mode on the 4-port 10-Gbps switching module interfaces can operate in E port mode, TE port mode, and F port mode. 5Performance buffers are shared among all ports on the module.

> Table 13-13 lists the default settings for Generation 3 interface parameters.

> Table 13-13 Default Generation 3 Interface Parameters
> Parameter | Default
> --- | ---
> 48-Port 8-Gbps Switching Module | 24-Port 8-Gbps Switching Module | 4/44-Port 8-Gbps Host-Optimized Switching Module
> Speed mode | auto1 | auto1 | auto_max_4G2
> Rate mode | shared | shared | shared
> Port mode | Fx | Fx | Fx
> BB_credit buffers | 32 | 32 | 32

> 1Auto speed mode on the 8-Gbps switching modules enables autosensing and negotiates to a maximum speed of 8 Gbps. 2Auto_max_4G speed mode on the 4/44-port 8-Gbps switching module negotiates to a maximum speed of 4 Gbps.

> Table 13-14 lists the default settings for Generation 4 interface parameters.

> Table 13-14 Default Generation 4 Interface Parameters
> Parameter | Default
> --- | ---
> 48-Port 8-Gbps Advanced Fibre Channel Switching Module | 32-Port 8-Gbps Advanced Fibre Channel Switching Module
> Speed mode | auto1 | auto1
> Rate mode | shared | shared
> Port mode | Fx | Fx
> BB_credit buffers | 32 | 32

> 1Auto speed mode on the 8-Gbps switching modules enables autosensing and negotiates to a maximum speed of 8 Gbps.

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