We need to stack 3850 switches for our application. I can use 'software install file' on the switches individually from USB, but when they are configured in a stack the install fails. Two different laptops: HP Specter360x Windows 10 - 64 IMB Thinkpad Windows 7 - 64 USB: PNY 8 & 16 Gig, Cruser 4 & 8 Gig, Unnamed 1 Gig USB, TFTP fail in stacks on front ports and management interface.

Hello S-Phipps, Plesae find quick guide on upgrading and booting, see below as a reference. Recovering from a 3850 boot failure. There are multiple reasons a 3850 may fail to boot correctly including a corrupt boot image, a corrupt packages.conf file, missing files, etc. Below are a few different possible recovery methods to try. I will also explain the two possible mode options, Install and bundle and why you might want to use one or the other. Bundle Mode There are a few difference in the two modes, I would recommend reading over the config guide for more in-depth details. The recommended mode during operation is INSTALL mode because it allows for more features and requires fewer resources when booting.

++Install Mode This is the out-of-the-box mode that your switch will be in. INSTALL mode uses a package provisioning file named packages.conf to boot the switch. If you happen to be in bundle mode upon boot, you can simply boot your switch in install mode by booting the software package provisioning file that resides in flash. If packages.conf doesn�t exist in flash, you need to expand the bundle into the flash file system by running Switch# software expand file flash: cat3k_caa-universalk9.SPA.03.02.02.SE.150-1.EX2.bin to flash: Once this completes, you will have all the needed files in flash. You can then change the boot statement to boot to packages.conf Switch#Config t Switch(config)# no boot system Switch(config): boot system switch all flash:packages.conf (do not modify this file, unless necessary) Switch#write memory The provisioning file contains a list of software packages to boot, mount, and run.

The ISO file system in each installed package is mounted to the root file system directly from flash. NOTE **Auto-upgrade is disabled, by default. (once in install mode - execute the following command in global config: software auto-upgrade enable ) NOTE **Auto-upgrade includes an auto-copy process and an auto-extract process. ++Bundle Mode As noted previously, bundle mode consumes more memory than booting in install mode because the packages are extracted from the bundle and copied to the RAM. If you decide to convert to bundle mode, you will first need to download the.bin file from CCO if you don�t already have it in flash. Once in flash, you can simply change your boot statement to point to the (.bin) file: Switch#Config t Switch(config)# no boot system Switch(config): boot system switch all flash: cat3k_caa-universalk9.SPA.03. Download Karaoke Song List Creator Pro Kj Edition 2.6. 02.02.SE.150-1.EX2.bin Switch#write memory The provisioning file contained in a bundle is used to decide which packages to boot, mount, and run. Packages are extracted from the bundle and copied to RAM.