bcm5631 Broadcom Corp., bcm5631 Datasheet

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... Filters and forwards traffic at full wirespeed on all 12 ports at all layers of functionality. This equates to 24 Gbps of bandwidth. • Provides a mechanism to bundle together ports at the same speed to form a port bundle or a trunk group, establishing up to six trunk ports. BCM5631 Application Diagram Fiber Fiber Fiber XCVR XCVR XCVR ...

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... Aggregation Control Protocol (LACP) frames are handled by the accompanying CPU and the marker protocol is handled in hardware. The BCM5631 can be initialized and configured by an EEPROM or a CPU, which is also responsible for search table updates and management functions. The CPU is a separate port to the device, containing its own Tx FIFO and Rx FIFO ...