I'm trying to figure out whether we should upgrade all of our ISR 4331's to Fuji 16.09.03 or Everest 16.06.06.
The current IOS version on the 4331's is 15.5(3)S6. The current ROMMON version is 16.7(3r)
I've upgraded a lab 4331 directly to Everest 16.06.06 and it appears to be working fine. If I wanted to upgrade to Fuji 16.09.03, I would also need to upgrade the ROMMON in order to get Fuji to work.
Looking at this from a maintenance stand point, Everest seems to be the answer because it has one less step. Are there any significant feature sets in Fuji or Everest that differentiates the two? Is one of them more buggy than the other, in your experience? We will be upgrading about 30+ of them, so I want to make sure we take the right track.
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