3850 IOS upgrade from 03.02.02.SE to Everest 16.6.8.

[MilanVerma17]

Hello All,

I have to upgrade IOS fo 3850 switches from 03.02.02.SE to Everest 16.6.8.

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
1 56 WS-C3850-48T 03.02.02.SE cat3k_caa-universalk9 INSTALL
2 56 WS-C3850-48T 03.02.02.SE cat3k_caa-universalk9 INSTALL

Can we upgrade from current to new (i.e Everest 16.6.8) without interim versions?
Also please share the step by step process to upgrade it from  03.02.02.SE to Everest 16.6.8.

[Leo Laohoo]

Upgrade from 3.X.X to 16.X.X is supported, HOWEVER, take note this is a "very big jump". This means there will be a automatic micro-code upgrade and this will take around 24 minutes.

[MilanVerma17]

Hi Leo,  Thanks for your replay. Is it takes 24 minutes in bootup after reload?

[Leo Laohoo]

Yes.