Starting in 16.8.1a, FSU is supported to reduce the amount of data plane downtime during an IOS upgrade. Has anyone tried this out yet? The word is it'll cut downtime in half, but I haven't seen it in writing anywhere. Also looks like it doesn't work if there is a microcode update. I'm going to be testing soon but just curious to how the community feels about it. When Cisco patches their latest bug on the C9300 stacks - I'm sure many of us will be looking for faster upgrades if it works well.
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