Switch default settings, Setting switch defaults, Select y – Allied Telesis AT-S21 User Manual
Page 19: Switch default settings -3, Setting switch defaults -3, 6zlwfk#'hidxow#6hwwlqjv

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To set your switch to the factory defaults, do the following:
Warning
This operation deletes existing switch configurations.
1. Attach a terminal to the RS232 port located on the front panel of
the switch and begin the terminal emulation program.
2. Press <Reset> located on the right side of the switch’s front panel.
3. Immediately press any key when you see
Hit any key to run
diagnostics or to reload system software
. A menu
then displays.
4. Select
D
from the menu. The following warning message displays:
WARNING: This will erase all current
configuration data!
Continue? Y/N
5. Select
Y
.
The system displays:
All configuration data has
been reset to factory default values
.
Press <B> to boot the switch software