Value PORT_ID (\S+)
Value DESCRIPTION (.+)

Start
  ^=+\s*$$
  ^\s*$$
  ^Port\s+Descriptions\s+on\s\S+\s+\S+\s*$$ 
  ^Port\s+Id\s+Description\s*$$
  ^${PORT_ID}\s+${DESCRIPTION}\s*$$ -> Record
  ^-+\s*$$
  ^. -> Error