MACsec Intel® FPGA IP User Guide

ID 736108
Date 10/21/2022

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Document Table of Contents Packet Decrypt

The table below illustrates the fields required to perform a lookup when the packet is classified to go through the decryption lane. This packet type is identified when a packet is coming through the decryption port. Upon successfully obtaining the valid SA index from SADB, the packet is forwarded to the Decryption Framer/Deframer for processing.
Table 47.  Fields Required for Packet Lookup When Packet is Classified for Decryption
Ethernet Packet Field Action Result
Port TID SADB Lookup Valid SA index return
AN SADB Lookup Valid SA index return
SCI SADB Lookup Valid SA index return

If the packet doesn’t contain an SCI field, the default SCI is used. The default SCI is obtained through RX_LANE_SCI_DFLT[Port ID] CSR.