• Cisco Router Command List
• Cisco Switch Break Commands
• Break Command For Cisco Switch

This will help you to get your Cisco switch operational in the event it ever has a corrupted boot image.

7 Steps total

Remove the StackWise cable from the switch. (Note: The switch stack operation continues uninterrupted during membership changes unless the stack master is removed or powered-on standalone switches or switch stacks are added.) 3. Issue the command no switch stack-member-number provision command. Then reload the switch to make sure everything worked correctly. If you every run into the unfortunate issue of the switch reporting a bad image after an upgrade, reboot or a crash you can use this to help or point you in the direction to get it back up and running.

Step 1: Image Download

You will need to go to the Cisco website and find the correct image for the switch you have

Step 2: Tera XMODEM

You will need to down Tera Term XMODEM
https://tera-term.en.softonic.com/?ex=BB-527.3

Step 3: Enter ROMMON mode on the switch

You will need to enter the ROM mode on the switch. You can do this by clicking on the break key during the switch boot up.

Step 4: Formatting Flash

You will need to format the flash to start fresh for the IOS replacement.

Use the following command < Format Flash: >

Step 5: Change BAUD rate for the transfer

You will need to change the BAUD rate on the switch to download or transfer the image.

Command < set BAUD 57600 >

You will then need to change the BAUD Rate on Tera XMODEM
Setup > Serial Port >

Step 6: Now we need to copy or transfer the image over

You will do this with the following command:

Copy xmodem:< image name > Flash:< image name >

Then go the File > XMODEM > Send

Find the file on your computer and select it.

Step 7: Set boot image

We will need to set the boot image to the image you just transferred. Use the following command to accomplish this.

Boot Flash:

Then reload the switch to make sure everything worked correctly.

If you every run into the unfortunate issue of the switch reporting a bad image after an upgrade, reboot or a crash you can use this to help or point you in the direction to get it back up and running.

4 Comments

• Datil
  KrasimirPetrov_ Oct 31, 2018 at 02:47am

  Good read. Thank you very much for sharing.
  Excellent tutorial

• Sonora
  Doog Dec 14, 2018 at 09:44pm

  I might add 'set BAUD 9600' just before Boot flash:

  Forgot to do that on two switches I'm working on... more work later.

  Wish I had found this how to before scouring google for hours several days ago.

• Poblano
  ReallyRosie Feb 13, 2019 at 08:38pm

  That is really good to know, thank you for that, Cisco can be expensive...

• Jalapeno
  China-IT-Support-Expert Jul 31, 2019 at 02:44am

  Thanks. Great read. Good to know if it ever happens.

From Cisco:

Complete these steps in order to remove a switch:

1. Power off the new stack member to be removed.

Cisco Router Command List

2. Remove the StackWise cable from the switch. (Note: The switch stack operation continues uninterrupted during membership changes unless the stack master is removed or powered-on standalone switches or switch stacks are added.)
3. Issue the command no switch stack-member-number provision command. (Note: You must remove the specified switch from the switch stack before you use this command in order to delete a provisioned configuration.)

Cisco Switch Break Commands

Reference: https://supportforums.cisco.com/document/19701/how-add-and-remove-cisco-catalyst-3750-switch-existin...

Break Command For Cisco Switch

EDIT: formatting