IOS filename extension are not important, the file name could be c3750-ipservices-mz.122-35.SE5 without the '.bin' and still be valid. If you look at ' show ver ' you'll have an indication of the filename the device used to boot at the ' System image file is ' line. Software Download. Login to view your download history LOG IN NOW. Most Popular - No recent downloads for this product - Select a Product.
c3750
Example Issue
Issue: cannot boot, prompt is at switch:
Switch: c3750
IOS: c3750-ipbasek9-mz.122-55.SE1.bin
Requirements
Have your .bin file stored locally (laptop)
linux + minicom with working serial connection
Steps
Connect to switch - minicom 9600 8N1
CHANGE baud rate of switch (otherwise it will be hours to load a file)
change minicom to 115200 8N1
ready switch to recieve file over xmodem
send the local .bin file with minicom through xmodem
watch your .bin file load! It will still be slow, but not hours @ 9600
Upgrading Software Images On Catalyst 2950 And 2955 Series Switches Using The Command Line Interface
set baud rate back to 9600
otherwise you or someone else will be really confused when they next try to use it. Go back into the bootloader by power-cycling the switch and holding down the “Mode” button.
type boot (may have to type boot flash:/<your cisco file>.bin
Check that you can reboot OK without ending up in the bootloader again.
Other Tricks
If the switch is not going into the bootloader, you may be able to force it
Try power-cycling the Catalyst while holding the “Mode” button on the front in to get the bootloader.
file system needs to be initialzied
Type “flash_init” to initialise the filesystem. (In our case, this wasn’t necessary)
Type “load_helper” to load any helper files (in our case there weren’t any since we’d just wiped the flash).
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