Precautions for upgrading from 9.7.7 to 9.9.2-P2

[Wang, Yu]

Hello,

I am in the process of preparing bind upgrade from 9.7.7 to 9.9.2-p2. I am reading release notes from 9.8.0 up to see if there are new things/features that might cause issues. I would welcome and appreciate advice on precautions I should take before, during, and after upgrade. Any issue did you run into in your upgrade; what impacts it had; and how did you resolve it.

Thank you for your time.

Yu Wang
Network Architect
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