SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The ALE may be configured to operate in OUI deny mode by setting the ENABLE_OUI_DENY bit in the CPSW_ALE_CONTROL register. When in OUI deny mode, a packet with a non-matching OUI source address will be dropped unless the destination address matches a multicast table entry with the SUPER bit set. When ENABLE_OUI_DENY bit is cleared, any packet source address matching an OUI address table entry will be dropped to the host unless the destination address matches with a supervisory address table entry. Broadcast packets will be dropped unless the broadcast address is entered into the table with the SUPER bit set. Unicast packets will be dropped unless the unicast address is in the table with BLOCK and SECURE both set (supervisory unicast packet).