{HEAD ~ The resulting match action} is to replace {TAIL ~ the source} Ethernet MAC address with the FCF MAC address, FIACntrlMAC, and add a tunnel that can be based on a number of methods which may comprise but not be limited to VID replacement, MAC header addition , VLAN addition , TRILL, Shortest Path Bridging, VPLS, MPLS, or a special MAC replacement 
is to replace
{ HEAD ~ The resulting match action } is to replace { TAIL ~ the source } Ethernet MAC address with the FCF MAC address , FIACntrlMAC , and add a tunnel that can be based on a number of methods which may comprise but not be limited to VID replacement , MAC header addition , VLAN addition , TRILL , Shortest Path Bridging , VPLS , MPLS , or a special MAC replacement
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