Server migration

Running an old version on old hardware and looking to migrate this to a new
VM on RHEL8. I'd also most likely use Terbithia RPMs for this

I saw a couple of posts on how to move all historical data over.  Question
for those who've done this, how did you handle IP addresses?

I thought about setting up the server with a new temp IP address and have
it do all outbound tests to make sure everything works.  Then change the IP
when decommissioning the old one. This would allow remote tests to report
back. Or would you set up as new IP and have clients report to both, then
remove the old one?

TIA.

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