Upgrade switch in Install Mode

[dijix1990]

I have a question, install mode before was a procedure for safe install software. I mean you can install software without commit and if something happened wrong a device perform rollback to before software. My question is now you can't perform upgrade without commit?

[balaji.bandi]

Most cases the upgrade go as expected we never seen any issue if the guide lines followed.

To rollback you need to downgrade the software, since you have both the image available in the switch you can use old image if the upgrade fails.

this is technically possible - and we do not know the model of the device and IOS code from to you upgrading, (if you need specific answer you need to provide this information)

[dijix1990]

C9200l / c9300l / c9300x / c9500

From 17.6.5 to 17.9.3

[balaji.bandi]

Cat switches ok you can upgrade.

Router you need to read the release notes, it may required ROMMON Upgrade.

Note : always read the release notes when you upgrading.

[dijix1990]

Of course I know that I can upgrade, but my question is different - Why I need add command commit?

install add file cat9k_iosxe.17.11.01.SPA.bin activate
% Incomplete command.

and router upgrade rommon now with new software after 16.12 

[balaji.bandi]

is this router or switch ? - which device not accepting this command ? what was the version before you putting new Code 17.11 ?

[dijix1990]

Devices doesn't matter, because I tried on the isr4431/c9300L/c8500L.

I tried to upgrade from 17.6.5 to 17.9.3 without commit action to do commit after reload

[dijix1990]

And I tried upgrade isr4431 from 17.6.5 to 17.9.3 and lost manage for one of two isr4431