NetworkGods – Routing, Switching, Wireless, Automation
A few days ago I wrote another post showing a way of how to implement a code upgrade for a Cisco Catalyst 3850 Switch from 3.x.x to 16.x.x.
Since the commands to be used are slightly different when upgrading from 16.x.x to 16.x.x (Denali to Denali and so on), I decided to write this down. I know I had some problems when I moved from 3.6.6 to 16.
The below commands can be used for the newer models of switches the Catalyst 9k Series as well.
Right, this is a fairly easy procedure. However, when I first touched an IOS-XE bin image I managed to nicely transform a stack of 3 x Catalyst 3850 into a lovely expensive brick. This happened back in 2014 only because I thought I have to change the boot statement to “tell” the stack what file to use to boot. I was very wrong and that caused me a lot of pain and misery. I also hit a bug with that particular version of code. About bugs, in a different post.
Just double check the running version of code, make sure you’re on 3.x.x and follow the below steps:
