SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
CPPI port ingress packets can be passed in with or without a CRC. The host port is Ethernet CRC only. CPPI ingress packets are not checked for CRC correctness on CPPI ingress, however they are checked for correctness on Ethernet egress and are output with a CRC error if they came in with a CRC error. If a CPPI ingress packet does not have the INFO0 PASSED_CRC bit set then a CRC will be generated for the packet on CPPI ingress. If the PASSED_CRC bit is set then the packet is received and forwarded unchanged. The CRC type is input in the INFO0 word CRC_TYPE bit and must be Ethernet CRC.