#1 [111.123.164.80]  [123.126.126.126] 87 #000:00:00.0000.000.000     0
#+6/07/2000 04:39:00 PM SNMP: Get

           # Guess you have to ( pattern ) to store and use it with $1,$2,$3 , in your code you match it but you do not store it and hence print the line by itself



                  if ($_ =~ /(\[.*\])\s+(\[.*\]).*(SNMP: Get$)/){
                        print "[$1] [$2] [$3]\n";

                  }