If it is necessary to revert or rollback to a previous configuration this can be done using the 'rollback' command from CLI.

You need to revert to a previous configuration file.

You can revert or rollback to a previous configuration file using the 'rollback' command from either the CLI or J-Web interface.  This procedure is from the CLI only. 

NOTE : For J-Web you can access the 'rollback' function under the ' maintain > Config Managment > History ' menus.

Loading a Previous Configuration File (CLI Procedure)

You can return to a previously committed configuration file if you need to revert to a previous configuration or if you have lost management access to the switch. The EX-series switch saves the last 50 committed configurations, including the rollback number, date, time, and name of the user who issued the commit configuration command.

Syntax
    rollback (number)

Options

• None — Return to the most recently saved configuration.
• Number — Configuration to return to.
  • Range : 0 through 49. The most recently saved configuration is number 0, and the oldest saved configuration is number 49.
  • Default : 0

1. Specify the rollback number:

   [edit]
user@switch# rollback number
load complete

2. Activate the configuration you have loaded:

   [edit]
user@switch# commit

2020-08-10: Minor, non-technical edit.

• Loading a Previous Configuration File (CLI Procedure)