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Linksys Switch PassWord recovery Procedure Models

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#1 Ben_Mott


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Posted 12 August 2008 - 08:17 AM

Hello Again,

Linksys Switch Password Recovery Procedure

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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FAQ Switches
What is a Switch?
A switch connects all computer LAN connections into one device like a hub. Unlike hubs, switches can run at full-duplex mode. This means that the computer and switch can both transmit and receive simultaneously. The biggest difference between a switch and a hub is that when a computer transmits a digital signal to a hub, it’s then sent to all ports attached to that hub, whereas a switch will send it only to the specific port where the destination MAC address is located.

Why can’t I connect to my hub at full duplex?
Hubs cannot connect at full duplex. If your adapter supports half duplex, go to the advanced settings for the adapter and lock down the duplex to half. If you must connect at full duplex, you will need a switch, not a hub.

How do I know if my network adapter is working or not?
Look at the card itself. If your computer is up and running and connected to a switch, hub or another computer directly with a crossover cable and the light is illuminated next to where the cable is plugged into it, then that is a good indicator of whether or not the card is working.

How do I connect two computers without buying a hub?
You can connect two computers directly to each other by using what is called a crossover cable. This type of cable can be readily purchased at most computer supply stores.

What is the maximum length of Category 3, 4 or 5 twisted pair cable that can be used between computers and other devices such as hubs, switches, other computers, etc.?
The maximum length of Category 3, 4 or 5 twisted pair cable that can be used between computers and other devices on a network is 100 meters or about 328 feet. Keep in mind that this is a theoretical limit. Usually, you will want to keep the distance between devices well below the limit.