These variables include the number of tables, the size of {HEAD ~ the tables}, the source index, i.e., port, MAC address, {TAIL ~ IP address}, etc 
These variables include the number of tables , the size of { HEAD ~ the tables } , the source index , i.e. , port , MAC address , { TAIL ~ IP address } , etc
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH