Erased Flash - Need to Load Image

[4bsmith]

I accidentally erased the Flash directory on my C3560 switch and need to load a new image on it from which to boot normally.  Sure could use some helpful advice.

Found the following on TechRepublic. Thanks to ernirofori:

First of all you need to get the ios image in .bin format on the PC connected to the switch by hyperterminal console.

At the switch: prompt make sure there is enough space in flash memory by doing dir flash:

then issue the following command to put the switch to listen for xmodem transfers:

copy xmodem: flash:flash_filename

now  from the "transfer" dropdown menu on the hyperterminal, select "send  file" and choose "xmodem" in the subsequent dialog box and browse for  the flash_filename (the downloaded IOS bn file) and send.

The process takes a while but it works...

[Reza Sharifi]

Did you reboot the switch after erasing the image?.  If you have not, simply load an image from a TFTP server.

If you have, then there in no image and you have to use Xmodem to load a new image.

Have a look at this link for instruction

http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008015bfac.shtml

HTH

[4bsmith]

Oh, I went all the way and rebooted. I’m using XMODEM right now. Thank you for the correct answer, sir.

Bill Smith

Senior Network Engineer

North Country HealthCare

928-522-2444 Phone (2552)

928-522-2484 Fax

928-699-8554 Cell

wsmith@northcountryhealthcare.org

[Leo Laohoo]

Unless you start with the command "set BAUD=115200" the entire process will take approximately 4 hours.

By setting your XMODEM baud rate higher, the time to upload the BIN file will be approximately 45 minutes.

[4bsmith]

Got it to 115200, but didn't change it back before the switch booted to the image.  How does one change the baud rate back to 9600 from the Switch# prompt?

[Reza Sharifi]

Bill,

Here are the commands to change it to 9600

C3750-E#config t

Enter configuration commands, one per line.  End with CNTL/Z.

C3750-E(config)#line con 0

C3750-E(config-line)#speed 9600

C3750-E(config-line)#

verify that it is 9600 by issuing this command:

sh line con 0

HTH

Please rate if helpful

[Leo Laohoo · Accepted solution]

How does one change the baud rate back to 9600 from the Switch# prompt?

You've got two ways to set the baud rate back.

From ROMmon, use the command "unset BAUD".  The second one is to use the Reza's latest post.

[Leo Laohoo]

Thanks for the rating.