I read in a review that you must press the " management mode" button on the switch and the switch will reset into a management mode setting. My question is, does the switch become unusable for network traffic while in this management mode? Do you have to them reset it in a non-management mode so network traffic can resume or does management mode not effect the network traffic? I reason I ask is because I have a mission critical business and I can't have my network die when I need to change a setting in the switch. Thanks for your help.