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