{HEAD ~ A command} is sent from the FIAC to {TAIL ~ the FIA} to identify received FCoE frames to replace the source and destination Ethernet MAC addresses 
is sent to
{ HEAD ~ A command } is sent from the FIAC to { TAIL ~ the FIA } to identify received FCoE frames to replace the source and destination Ethernet MAC addresses
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH