Prerequisites for Fast Software Upgrade
Before starting a fast software upgrade, ensure that the software on your access switch is Cisco IOS XE Fuji 16.8.1a or later. (This feature is supported from Cisco IOS XE Fuji 16.8.1a .)
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
Before starting a fast software upgrade, ensure that the software on your access switch is Cisco IOS XE Fuji 16.8.1a or later. (This feature is supported from Cisco IOS XE Fuji 16.8.1a .)
Fast software upgrade is not supported if the Micro Controller Unit(MCU) Field Programmable Gate Array (FPGA) upgrade is required.
Fast software upgrade is not supported if the switch is configured as Stackwise Virtual System.
Fast software upgrade is supported only on access switches with a single logical uplink connection.
During a software upgrade on the switch, user traffic is disrupted until the new software completely boots up. The traffic downtime is a concern for customers running critical applications.
Cisco IOS XE 16.8.1a introduces fast software upgrade feature, which significantly reduces the traffic downtime during a software upgrade. The fast software upgrade feature is supported on both stacking and standalone systems.
Use the following procedure to perform a fast software upgrade:
Step 1 |
request platform software package clean switch all Clean up the previous package and provision files to free up memory for the new software. |
||
Step 2 |
install add file image activate fastreload commit Install the new software image with a fast software upgrade
|
Use the following show commands to verify the software upgrade:
Command |
Purpose |
---|---|
show switch |
Run this on a stacking system to ensure that all the systems in the stack are up and running. |
show version |
Run this command to ensure that the software has upgraded to the intended version. |
Related Topic | Document Title |
---|---|
For complete syntax and usage information for the commands used in this chapter. |
Command Reference (Catalyst 9500 Series Switches) |
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Release |
Modification |
---|---|
Cisco IOS XE Fuji 16.8.1a |
This feature was introduced. |