Question about 3Com SuperStack 3 3824 (3cr17402-91-uk) 44x1000 Mbps Networking Switch

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Wants to reset 3824 3com switch via console

3824 3Com switch - connecting from my notebook with serial cable - windows xp hyper terminal- shows connected, but I can't type anything.wants to reset the switch with user and password recover.

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You forget the password for the "admin" user account and can no longer perform important management operations. Wants to reset 3824 3com switch via console - solution.gif Use the password recovery method outlined below to define a new password for the "admin" user account:

  1. Access the Command Line Interface from the console port and enter the user name "recover" and password "recover" to place the Switch in password recovery mode. The Switch remains in password recovery mode for a maximum of 30 seconds, before it returns to the CLI login prompt.

    note.gif You must use the console port to recover the passsword. If you attempt the recovery method using the network, the password will be rejected.

  2. Perform a hard reset on the Switch whilst it is in password recovery mode by switching it off, waiting a few seconds, and sWants to reset 3824 3com switch via console - note.gif it on again.

    note.gif You cannot use a soft reset operation to reset the password of the "admin" user account. This will end the password recovery procedure and return you to the CLI login prompt.

  3. When the Switch has rebooted following the hard reset enter a new password for the "admin" user account.

Posted on Mar 05, 2009

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1 Answer

I forgot ip address and password and want to factory reset


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.

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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:

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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.


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Select the "Agent configuration" command by entering 1.

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


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Select the "Restart agent" command by entering 6.

Then follow the instructions on the screen.


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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

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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.

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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!

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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>”
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At this point the password has been reset.

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

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3 Answers

3Com 3824


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

Jan 14, 2008 | 3Com SuperStack 3 3824 (3cr17402-91-uk)...

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