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3850 different IOS 16.3.6 vs 03.06.06E

Todd Killian
Level 1
Level 1

I just received five 3850-48P-E switches. Some have  03.06.06E ((CAT3K_CAA-UNIVERSALK9-M), Version 03.06.06E) and some have 16.3.6 ((CAT3K_CAA-UNIVERSALK9-M), Version 16.3.6) .  Why are they so different?  I would like to maintain one version of IOS across all of them.  Which IOS would I choose?

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Leo Laohoo
Hall of Fame
Hall of Fame

@Todd Killian wrote:

I just received five 3850-48P-E switches. Some have  03.06.06E ((CAT3K_CAA-UNIVERSALK9-M), Version 03.06.06E) and some have 16.3.6 ((CAT3K_CAA-UNIVERSALK9-M), Version 16.3.6). 


Maybe because some of the 3850 is unable to boot 3.6.X (and earlier).  (CSCul95378)


@Todd Killian wrote:

Which IOS would I choose?


Read the Release Notes of both 3.6.X and 16.3.X and make that decision.  

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