Upgrading IOS on Cisco 3750 switch stack gotcha

Command to set boot system switch all flash failed

If you are using upgrading the Cisco IOS version on the switch stack manually you normally set the boot variable on the switches to use the new IOS file you have uploaded. If your switch stack has more than one member (it isn't really a stack if it doesn't) you must copy the ios to the flash of each member switch. Otherwise when you issue the command you may get the following error referencing each switch in the stack which does not have the image on it's local flash. To upload the system ios image to each member switches flash you can copy it from a TFTP server of from another switch flash that has the image. via TFTP * Replace flash2 with flash3 or whichever switchnumber you wish to put the image file on. via Local flash to flash copy