I think your problem is in parsing the output of your "fcping 50:06:0E:80:03:27:AA:11" command. You are currently assigning the multi-line output of the command to a scalar variable, $temp. It may make things clearer to assign the output to an array, then loop over the lines of output looking for your special string using a regex instead of split:

my @fcping_lines = `fcping $port`;
for (@fcping_lines) {
    if (/\s+ and \s+ (.*?) \s+/x) {
        my $unsucces = $1;        
        if ($unsucces eq "0") {
            print "Network Issue\n";
        }
        else {
            print "Check HBA Status\n";
        }
    }
}
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Make sure to use strict; use warnings and declare all you variables with my.

It may also be useful to check the success of your fcping commands, by checking the $? special variable.