SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The Address Lookup Engine (ALE) is a sub-block of the CPSW Switch and it processes all received packets and determines to which port(s) the packet should be forwarded. The ALE uses the incoming packet received port number, destination address, source address, length/type, and VLAN information to determine how the packet should be forwarded. The ALE outputs the port mask to the switch fabric that indicates the port(s) the packet should be forwarded to. The ALE is enabled when the ENABLE_ALE bit in the CPSW_ALE_CONTROL register is set. All packets are dropped when the ENABLE bit is cleared to 0.