It is common for the switch to forget the password. It is important to forget the password. It is important to forget how to reset it. Here is how to reset the password for the Cisco 3750 switch.
1.Enable HyperTerminal and display the connection interface
2.unplug the power of the switch
3.Press the Mode button on the switch, and at the same time, plug in the power cord of the switch.
4.When the sys light on the left side of the switch will slowly flash, (if you are careful, you will find that some of the lights flash red), hold down the mode button until the sys light does not flash (normally lit). Otherwise, if you release the button in advance Will directly enter the normal startup, must jump back to step 2 to re-operate
5.you can release the Mode button
After that, the system will display some instructions:
The system has been interrupted prior to initializing the flash file system.
Commands will initialize the flash file system, and finish loading the operating system software:
Flash_init //Initialize the flash file system
Load_helper / / load the help file
Boot //Start the device to enter normal mode
Perform the following steps:
Switch:
Switch: flash_init
Switch: dir flash: / / View the file name of Flash can be used to confirm the file name is config.text
Switch:rename flash:config.text flash:config.text.old //Rename the configuration file, of course you can not change to config.text.old, as long as the file name is different from the original one.
Switch:boot //Manually start the switch
Since the configuration file has been changed, the switch can't find the default config.text and the configured dialog wizard appears. Select n and then press Enter and we will bypass the original password and enter:
Switch>
Switch>en // can enter privileged mode
Switch#rename flash:config.text.old flash:config.text //Restore the switch configuration file
Switch#copy flash:config.text system:running-config //Save the configuration to DRAM
Switch#config t
Switch(config)#no enable password //Delete privileged mode old password
Switch(config)#no enable secret //Delete encrypted password
Switch(config)#exit
Switch#copy run start //Write the currently configured file back to Flash
Modifying the password in this way does not clear the contents of the original configuration file.
In particular, a switch that is already running in a large, off-the-shelf network is safer!
The above is about the Cisco 3750 switch forgot password reset method, if you have any questions, please consult our online customer service for other needs.
Related Reading：
How To Troubleshooting Cisco 3750 Switches
How to stack Cisco 3750 Series Switches
