I want to upgrade the IOS of my stacked 9300 switch

[yum3372]

Hi all,

I have a stacked 9300 and it has 3 switches. current IOS version is 16.12.04 and I want to upgrade it to 17.12.03.

The master switch is switch 3 and flash3 has 17.12.03 bin file. Should I copy it to flash1 and flash2 before upgrading? 

Is it okay if only flash3 has the bin file? Is there any command for auto copy on stacked switch?

[M02@rt37 · Accepted solution]

Hello @yum3372 

Please follow this guide:

https://blog.noblinkyblinky.com/2019/07/27/upgrading-ios-xe-on-catalyst-9000-series-switch-stack/