Concept Guide

Restoring the Factory Default Settings
Restoring the factory-default settings deletes the existing NVRAM settings, startup configuration, and all configured settings
such as, stacking or fanout.
To restore the factory default settings, use the restore factory-defaults stack-unit {stack—unit—number |
all} {clear-all | nvram | bootvar} command in EXEC Privilege mode.
CAUTION: There is no undo for this command.
Important Points to Remember
● When you restore all the units in a stack, these units are placed in standalone mode.
● When you restore a single unit in a stack, only that unit is placed in standalone mode. No other units in the stack are
affected.
● When you restore the units in standalone mode, the units remain in standalone mode after the restoration.
● After the restore is complete, the units power cycle immediately.
The following example illustrates the restore factory-defaults command to restore the factory default settings.
DellEMC#restore factory-defaults stack-unit 1 nvram
***********************************************************************
* Warning - Restoring factory defaults will delete the existing *
* persistent settings (stacking, fanout, etc.) *
* After restoration the unit(s) will be powercycled immediately. *
* Proceed with caution ! *
***********************************************************************
Proceed with factory settings? Confirm [yes/no]:yes
-- Restore status --
Unit Nvram Config
------------------------
1 Success
Power-cycling the unit(s).
....
Restoring Factory Default Environment Variables
The Boot line determines the location of the image that is used to boot up the chassis after restoring factory default settings.
Ideally, these locations contain valid images, using which the chassis boots up.
When you restore factory-default settings, you can either use a flash boot procedure or a network boot procedure to boot the
switch.
When you use the flash boot procedure to boot the device, the boot loader checks if the primary or the secondary partition
contains a valid image. If the primary partition contains a valid image, then the primary boot line is set to A: and the secondary
and default boot lines are set to a Null String. If the secondary partition contains a valid image, then the primary boot line is set
to B: and the secondary and default boot lines are set to a Null String. If both the partitions contain invalid images, then primary,
secondary, and default boot line values are set to a Null string.
When you use the Network boot procedure to boot the device, the boot loader checks if the primary partition contains a valid
image. If a valid image exists on the primary partition and the secondary partition does not contain a valid image, then the
primary boot line is set to A: and the secondary and default boot lines are set to a Null string. If the secondary partition also
contains a valid image, then the primary boot line value is set to the partition that is configured to be used to boot the device in
a network failure scenario. The secondary and default boot line values are set to a Null string.
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Management