Hard reset or 30/30/30
From DD-WRT Wiki
DO NOT attempt to reset or power cycle the router while it is still in the process of upgrading! |
Hard Reset (aka 30/30/30 reset):
- With the unit powered on, press and hold the reset button on back of unit for 30 seconds
- Without releasing the reset button, unplug the unit and hold reset for another 30 seconds
- Plug the unit back in STILL holding the reset button a final 30 seconds.
This will clear out the NVRAM and set the dd-wrt back to default values.
This procedure should be done BEFORE and AFTER every firmware upgrade/downgrade
Do not use configuration restore if you change firmware builds (different svn build numbers)
Erasing NVRAM:
As an alternative method, it is possible to restore DD-WRT to default settings without using the reset button (useful when the reset button is disabled, broken, etc. or if your router just refuses to reset using 30/30/30).
The following requires that DD-WRT already be installed on your router, and Telnet (or SSH) services be enabled and accessible.
Telnet (or SSH) into 192.168.1.1
Issue commands:
erase nvram reboot
or
mtd -r erase nvram
All should be in default settings now.