01-23-2020 02:46 PM - edited 01-23-2020 02:47 PM
Hi everyone,
IOS-XE 16.6.x Release Notes for 3850 model https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-6/release_notes/ol-16-6-3850.html
state:
"During an IOS image upgrade or downgrade on a PoE or UPoE switch, the microcode is updated to reflect applicable feature enhancements and bug fixes."
"The microcode update occurs only during an image upgrade or downgrade on PoE or UPoE switches. It does not occur during switch reloads or on non-PoE switches."
Yesterday I upgraded a WS-C3850-24XS-E (which is not PoE nor UPoE afaik) from 16.3.6 to 16.6.7, and the microcode was indeed upgraded.
Did anyone have the same experience?
Cheers
Fed
01-23-2020 03:25 PM
01-23-2020 03:41 PM
Thank you Leo (it's always a privilege receiving your answer!), problem is RN don't state that, so they are misleading when it comes to calculate the outage, or if you do it remotely with no console access and switch doens't come back in 10 mins.
At least for bootloader, RNs are generic enough "For subsequent IOS XE 16.x.x releases, if there is a new bootloader in that release, it may be automatically upgraded based on the hardware version of the switch when you boot up your switch with the new image for the first time".
But one thing is staying vague, another is stating "done only for PoE or UPoE switches".
Thanks
Fed
01-23-2020 04:52 PM
@Feds wrote:
or if you do it remotely with no console access and switch doens't come back in 10 mins.
Always prepare for a 30 minute outage, micro-code upgrade or not.
01-23-2020 05:10 PM
Sure, good suggestion. Thank you.
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