How to Change the Password on a 3750 Switch?


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Guide to Change the Password on a 3750 Switch

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How to Change the Password on a 3750 Switch?

  1. 1. How to Change the Password on a 3750 Switch?The Cisco 3750 switch has contributed greatly to Ciscos success in thenetworking hardware market. Its features provide efficient and reliablenetwork switching services. You can find a pre-owned 3750 model at agood price, and if you do buy a pre-owned Cisco 3750 switch, you mayneed to change the password before you are able configure it to work onyour network. Fortunately, Cisco has provided a built-in procedure thatallows you to change the password.Things Youll NeedCisco 3750 switch and serial cableComputer with terminal emulation software
  2. 2. How to Change the Password on a Catalyst 3750 Switch?1. Connect your computer to the 3750 switch using the blue serial cablethat typically comes with it. Connect the 9-pin d-shell connector to yourcomputers serial port, and connect the RJ-45 connector to the switchsconsole port.2. Configure a terminal session to the switch. Power up your computer,open a terminal emulator application, and configure a terminal sessionwith the following settings:9600 baudno parity1 stop bit8 data bitsXon/Xoff flow control
  3. 3. Save the configuration with a name that you can recognize later.3. Hold down the "Mode" button on the left front of the Cisco 3750switch, and plug in the power cable. Five seconds after the Stat LED goesoff, release the "Mode" button. The SYST LED should start to blink amber.4. At the command prompt, issue the following commands to the switchto prepare it for the reset procedure, and rename the currentconfiguration file:flash_initload_helperdir flash:renameflash:config.textflash:config.old5. Boot the 3750 switch by issuing the "boot" command and pressing"Enter." At the "System Configuration Dialog" prompt, answer "n" andpress "Enter" twice. This should display the "Switch>" prompt.6. Issue the "en" command at the prompt, and press "Enter." You shouldsee the prompt change from "Switch>" to "Switch#." Rename theconfiguration file with the following command:
  4. 4. renameflash:config.oldflash:config.text (press "Enter")Press "Enter" to accept the destination filename default.7. Copy the configuration file into the 3750 memory with the followingcommand:copyflash:config.textsystem:running-configPress "Enter" when prompted for a destination filename to accept thedefault.8. eate new passwords for the 3750 switch with the followingcommands:conf tenable secret spswd (spswd = your new secret password)enable password enpswd (enpswd = your new enable password)linevty 0 15passwordtpswd (tpswd = your new terminal password)loginline con 0
  5. 5. passwordcpswd (cpswd = your new console password)write memoryThe Cisco 3750 will issue a "Building Configuration" message. When yousee the [OK] message at the Sw1# prompt, you have completed thepassword change for the Cisco 3750 switch.References:Cisco Catalyst Fixed Configuration Layer 2 and Layer 3 Switches