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I have forgot my admin password in 3com switch 4500 could you please help me

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Search the following documents for 'Password Recovery':
http://support.3com.com/infodeli/tools/switches/4500/s3n03_01_00sp01_readme.pdf
http://support.3com.com/infodeli/tools/switches/4500/3Com_Switch_4500_Command_Reference_Guide.pdf
Both of these document discuss the password recovery process for this device.

Posted on Mar 02, 2011

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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.
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You forget the password for the "admin" user account and can no longer perform important management operations. solution.gif Use the password recovery method outlined below to define a new password for the "admin" user account:
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    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 switching it on again.

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

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