Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 54)

Getting Started
Software Reference for x310 Series Switches
1.30 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
How to Undo Settings
There are two possibilities for undoing settings: the no parameter and the default
parameter.
How to Use the no Parameter
To undo most settings, simply re-enter the first parameters of the configuration command
with the parameter no before them.
Example You can set the timezone to Eastern Standard Time by entering the command:
To remove the timezone setting, enter the command:
How to Use the default Parameter
Some commands have a default parameter that returns the feature to its default setting.
Example You can change the login banner to “this is a new banner” by entering the command:
To return to the default banner, enter the command:
Note that this command also has a no parameter that lets you remove the banner
altogether.
awplus(config)# clock timezone EST minus 5
awplus(config)# no clock timezone
awplus(config)# banner motd this is a new banner
awplus(config)# banner motd default