Allied Telesis AT-S63 - Manual (Page 91)

AT-S63 Management Software Web Browser Interface User’s Guide
Section I: Basic Operations 91
5. To clear all the counters for the port, click Clear. To clear the counters
for all ports on the switch, click Clear All. (The Clear and Clear All
buttons are only available when you log on as a manager. They are not
available when you log on as an operator.)