sub mac {
$cnt        = 3;
$mac[0] = "00";
$mac[1] = "96";
$mac[2] = "14";
while ($cnt < 6) {
        $rand = rand(255);
        if ($rand < 5) {
                $rand += 2;
                $hex = sprintf("%X", $rand);
        }
        else {
                $hex = sprintf("%X", $rand);
        }
        $mac[$cnt] = $hex;
        $cnt++;
}