Complete Network Outage

Hello,

We have been told to plan for a complete network outage for about one hour.  We are currently running FAS2650 with 2 nodes.  Version NetApp Release 9.3P18.

Do we need to shutdown the controllers and disk array?  Our virtual machines with the Active Directory roles will likely be shutdown.  I am reluctant to show down any hardware that has been running nice for many years

Please advise.

Thanks,

TT