> # Task Flow for Configuring 12-Port 4-Gbps Module Interfaces

> The 12-port 4-Gbps switching modules support the following features:

> - 1-Gbps, 2-Gbps, and 4-Gbps speed traffic
> - Only dedicated rate mode
> - ISL (E or TE) and Fx (F or FL) port modes
> - Extended BB_credits
> - Performance buffers

> To configure 4-port 10-Gbps switching modules when starting with the default configuration, follow these steps:

> 1. Configure the traffic speed (1 Gbps, 2 Gbps, 4 Gbps, or autosensing with a maximum of 2 Gbps or 4 Gbps) to use.

> See the "Configuring Port Speed" topic.

> 2. Configure the port mode.

> See the "Configuring Interface Modes" topic.

> 3. Configure the BB_credits, performance buffers, and extended BB_credits, as necessary.

> See the "Configuring Buffer-to-Buffer Credits" topic, and the "Configuring Extended BB_credits" topic.

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