if ($enable_poe eq 'POE device missing or unpowered') {
print $enable_poe, "\n", "Your Poe IS NOT enabled, dummy\n";
}

##</code><code>##

if ($enable_poe =~ /POE device missing or unpowered/) {
    print $enable_poe, "\n", "Your Poe IS NOT enabled, dummy\n";
}