Software Install Overview - Cisco Catalyst 9500 Manual

Software Install Overview

The boot loader provides access to the file systems before the operating system is loaded. Normally, the boot
loader is used only to load, decompress, and start the operating system. After the boot loader gives the operating
system control of the CPU, the boot loader is not active until the next system reset or power-on.
Before you can assign device information, make sure you have connected a PC or terminal to the console port
or a PC to the Ethernet management port, and make sure you have configured the PC or terminal-emulation
software baud rate and character format to match these of the device console port:
• Baud rate default is 9600.
• Data bits default is 8.
Note
• Stop bits default is 2 (minor).
• Parity settings default is none.
Software Install Overview
The Software Install feature provides a uniform experience across different types of upgrades, such as full
image install, Software Maintenance Upgrade (SMU), In-Service Software Upgrade (ISSU)and In-Service
Model Update (data model package).
The Software Install feature facilitates moving from one version of the software to another version in install
mode. Use the install command in privileged EXEC mode to install or upgrade a software image. You can
also downgrade to a previous version of the software image, using the install mode.
The method that you use to upgrade Cisco IOS XE software depends on whether the switch is running in
install mode or in bundle mode. In bundle mode or consolidated boot mode, a .bin image file is used from a
local or remote location to boot the device. In the install boot mode, the bootloader uses the packages.conf
file to boot up the device.
The following software install features are supported on your switch:
• Software bundle installation on a standalone switch.
System Management Configuration Guide, Cisco IOS XE Amsterdam 17.2.x (Catalyst 9500 Switches)
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• Power over Ethernet (PoE) controller functionality test to check the chip accessibility, firmware
download, and health status of the power-sourcing equipment.
• Thermal test to verify the temperature reading from the device sensor.
• Fan modules test to verify if all the inserted fan modules are working properly on the board.
• Federal Information Processing Standard (FIPS) MACsec test.
Cisco Catalyst 9500 Series High Performance Switches:
• MAC loopback test to verify the data path between the CPU and network ports connected to each
module. If this test fails for any of the ports, the ports are forced into error-disabled state, and the
module is marked as post-fail in the show module command output.
For information about the complete list of supported online diagnostics, see the Configuring Online
Diagnostics chapter.
If the data bits option is set to 8, set the parity option to none.
Performing Device Setup Configuration