3850 stack IOS upgrade

[Pim Scheffers]

Hi,

Is it possible to upgrade the IOS on a cisco 3850 stack in a non disruptive way?

Reloading 1 switch at a time?

Or do you need to reload the entire stack at once, like a 3750 stack?

[zidjali2007]

Dears, Just you have to follow bug fix for this version. 

[zidjali2007]

I will proceed with this way. I hope it will work without any issues. 

[zidjali2007]

In case if i will use TFTP instated of USB  it will work or not. Any idea !!!!!!

[mhuaynate]

Hi Manny:

what happend with license after upgrade of IOS-XR, it does not lose ?

Thank.

Marco.

[Mandlenkosi Nkiwane]

I don't think there is any change to your licensing with the image upgrade..You still retain the same license features as long as you downloaded the corresponding software.

Thanks,

Manny.

[jonathangolder]

Slight modification.  for switch 2 (running 03.03.05) there is a hyphen before the switch number

Switch#copy usbflash0:[image name] flash-2:

this works well and much quicker than TFTP.

Thanks,

[Jim Matuska]

Just a note to make sure you have enough free space in flash memory on all your switches. I had one stack that would load the image file on the first switch and fail when trying to deploy to the other switches.  Turns out I had a bunch of old image clutter.  Once i purged the old IOS version files the upgrade went smoothly.