Wants to reset 3824 3com switch via console

Connect the console cable, open a connection to the serial port via a utility such as PuTTY, and do the following:
1) Enter the user name "recover" and password "recover" to place your unit in password recovery mode. The unit will remain in password recovery mode for 30 seconds max.
2) Perform a hard reset by removing power, waiting 10 seconds, and then re-applying power.
3) Once the switch has rebooted, enter a new password for the "admin" user account.
4) Enter enable to leave password recovery enabled, or enter disable to turn it off. You are now logged in as the default "admin" user.
Note: If password recovery has been disabled, the only way to recover access is to return the switch to 3com.

might need a null modem
https://en.wikipedia.org/wiki/Null_modem

Taken from the MGE UPS SYSTEMS, Network Management Card Installation manual (34003641EN/AD)

Run Hyper Terminal on a PC running Windows (9x, Me, NT4.0, 2000 or

higher).

◗ Connect the card to the PC using the cable supplied.

◗ Set up the terminal with the following communication parameters:

◗ 9600 bauds. ◗ 8 data bits.

◗ 1 stop bit. ◗ no parity.

◗ no flow control.

◗ ASCII: "echo typed characters locally" option disabled.

◗ Press the Carriage return key. The configuration menu is displayed.

◗ Enter the password (MGEUPS by default).

◗ The main menu is displayed.

◗ Select one of the items in the configuration menu.

Via the serial link or Telnet

◗ Select the "Agent configuration" command by entering 1.

◗ Select the item numbers and modify all the IP parameters (address, mask, gateway).

◗ Once all the modifications have been made, exit following the instructions on the screen.

Restarting the card Via the serial link or Telnet

◗ Select the "Restart agent" command by entering 6.

◗ Then follow the instructions on the screen.

Restoring the default parameters Via Telnet or Hyper Terminal

◗ Select the "Agent configuration" command by entering 1.

◗ Select the "Reset configuration to default" command by entering 5.

◗ Then follow the instructions on the screen

Hi

You can reset the device through RS232 port then please follow the below steps.

You need a laptop with Console port and a console cable for EOC-8610 EXT, You really dont need the IP address if you want to do it via console (RS232) interface.

1. Connect the console cable one end to EOC-8610 EXT RS232 port and other end to Laptop serial port.
2. Open Hyper terminal and select com-port option and then provide the username and password for the device management.
3. Go inside the system menu and select Reset Factory default.

Remember if u set to load the factory default settings, the device will loose its config and will boot up with factory default configuration.

If you also have a standard copper cable (or a second fibre cable) connecting the two switches (for resilience perhaps?), this issue is probably being caused by something called Spanning Tree. This is implemented on switches as a 'loop avoidance' system, and can look like you have described with one end 'ip' and the other end no lights.

On the Cisco switch, get to a telnet/ssh/console session, log in and enter show spanning-tree and press enter.

have a look to see if the fibre interface has a status (sts column) of BLK. If it has, then this is called 'blocking' and will remain like that until you remove the second link to the other switch.

Hope that this has helped!

The resetting of the password requires the installation of a console cable to the console port.

Be sure the terminal emulator program is set to VT-100 management using compatible, 38400 baud rate, no parity, 8 data bits and Console connection one stop bit.

Use the included cable, or be sure that the pin-out complies with a standard null-modem cable

Once the cable is connected, reboot the switch. Type a Ctrl/C until you enter the failsafe mode. This will be denoted with the prompt: “CFE>”
At the prompt execute the following commands:

CFE> passwrd
CFE> reset -sysreset

At this point the password has been reset.

The primary connection method for those switches would be serial connection. In the box there should have been a DB9 serial to RJ45 cable. Hyperterminal default settings would allow you to connect.

page 22 of the 3com user guide for your switch talks about how to use the console cable and how to connect to your pc, I included the link below for your manual, if you don't have it:

http://support.3com.com/infodeli/tools/switches/baseline/3Com_Baseline-Switch-2916-2924_User-Guide.pdf

you dont`t have a driver for serial comm.open hyper terminal on com port where is the scaner.read a code and you wilkl see the numbers on the screen.If you want to work with some windows programs change that barcode for usb or ps/2 variant.

Download free version of HyperTerminal for Vista : ftp://ftp.hilgraeve.com/htpe/htpe63.exe
Make a new connection :
connect using COM1 (depends of your configuration)
19 200 bits/sec
8 data bits
No parity
1 stop bit
No control of flux

And push enter twice to display a "Login:" prompt.
Connect using default user/passwords : http://support.3com.com/infodeli/tools/switches/ss3/management/ug/setup.htm#13131

Regards,

AstroMan