Hard reset or 30/30/30

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Revision as of 13:04, 18 September 2008 (edit)
Soulstace (Talk | contribs)
m (Erasing NVRAM: - mtd -r)
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Revision as of 18:50, 13 October 2008 (edit) (undo)
Soulstace (Talk | contribs)
m (Erasing NVRAM: - note from OpenWRT, probably applies to DD-WRT as well)
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As an alternative method, it is possible to restore DD-WRT to default settings without using the reset button 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). +(useful when the reset button is disabled, broken, etc. or if your router just refuses to reset using 30/30/30).
 + 
 +'''<code><font color=red>NOTE: On some devices, resetting NVRAM in this fashion may cause more problems than it solves. For example, Asus WL-500g and the Motorola WR850G bootloader will not recreate default values and will not boot properly after being reset. If you do this on a Siemens SE505 V1, your router will not be accessible to you anymore! You will have to reflash it with the stock firmware on IP address 192.168.1.1 (NOT 192.168.2.1 as the installation procedure says!!)</font></code>'''
The following requires that DD-WRT already be installed on your router, and [[Telnet/SSH_and_the_Command_Line|Telnet (or SSH)]] services be enabled and accessible. The following requires that DD-WRT already be installed on your router, and [[Telnet/SSH_and_the_Command_Line|Telnet (or SSH)]] services be enabled and accessible.

Revision as of 18:50, 13 October 2008

Image:Warning.png

DO NOT attempt to reset or power cycle the router while it is still in the process of upgrading!
Wait a couple of minutes after upgrade is complete and the router has rebooted itself.


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).

NOTE: On some devices, resetting NVRAM in this fashion may cause more problems than it solves. For example, Asus WL-500g and the Motorola WR850G bootloader will not recreate default values and will not boot properly after being reset. If you do this on a Siemens SE505 V1, your router will not be accessible to you anymore! You will have to reflash it with the stock firmware on IP address 192.168.1.1 (NOT 192.168.2.1 as the installation procedure says!!)

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.