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Password Recovery Procedure

Created by dave. Last edited by dave, 10 years and 177 days ago. Viewed 11,220 times. #1
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Linksys Switch Password Recovery Procedure

Originally authored by Jesse Molina, <jesse@opendreams.net>

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Revision History

  • 20060616, v1, Original document
At this time, this password recovery procedure is not made publicly available by Linksys. Furthermore, when I needed to password recover one of these switches for the first time, I was given wrong information from Linksys. As such, I'm documenting this procedure here for reference. In fact, this may be the first time this procedure has been documented.

Follow these steps to password recover the applicable Linksys switches.

Physical access of the switch is required, in order to connect the serial cable.

This procedure applies to Linksys models SRW2016, SRW2024, SRW2048, SRW224G4, SRW248G4, and possibly other switches.

  1. Connect the Linksys serial cable that came with the switch between the switch serial port and a nearby computer serial port. For Windows, use Hyper Terminal or VanDyke CRT/SecureCRT. For Linux, use minicom. For other unix types, try cu/tip.
  2. The switch default serial port configuration is set to 38400 baud, 8 data bits, no parity, 1 stop bit, no flow control.
  3. Confirm that you have a valid serial connection by pressing enter a few times. You should be prompted with a login screen.
  4. If you have successfully established serial communication with the switch, reboot the switch by disconnecting and then reconnecting it's power cable.
  5. The switch will begin it's POST procedure as displayed in the serial terminal emulator. Be ready at the keyboard to press the Esc key.
  6. Watch for the following line to appear during the boot sequence. When you see it, immediately press the Esc key:
    "Autoboot in 2 seconds - press RETURN or Esc. to abort and enter prom."
    IMPORTANT: Do not hold down the Esc or Enter/Return key during the boot sequence. Only press the Esc key when prompted.
  7. If you successfully interrupted the boot sequence, you will be prompted with a Startup Menu. Option number 3 will be the "Password Recovery Procedure". Select this option.
  8. The terminal will display, "Current password will be ignored!". Press enter to continue with the boot sequence.
  9. The default account "admin/<blank>" will be enabled and you can log into the switch using this account. From here, you can set new accounts without having lost the switch configuration.
  10. After you have configured new accounts and documented the passwords, reboot the switch and log in normally to confirm that passwords have been recovered successfully.
  11. You are done. Disconnect and store the serial cable in a safe place for future use. Be sure to document a login username and password somewhere safe for future reference.
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This is a collection of techical information, much of it learned the hard way. Consider it a lab book or a /info directory. I doubt much of it will be of use to anyone else.

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