Value PROTOCOL (\S+)
Value Required IP_ADDRESS ([A-Fa-f0-9:\.]+)
Value AGE (\S+)
Value Required MAC_ADDRESS ([A-Fa-f0-9\.]{14})
Value TYPE (\S+)
Value Required PORT (\S+)

Start
  ^Protocol\s+Address\s+Age \(min\)\s+Hardware Addr\s+Type\s+Interface
  ^${PROTOCOL}\s+${IP_ADDRESS}\s+${AGE}\s+${MAC_ADDRESS}\s+${TYPE}\s+${PORT} -> Record
  ^\s*$$
  ^. -> Error