Moving Exchange 2010 to another site

Hello all,
One of my customer wants to move is Exchange 2010 to another site.
The other site is from a different VLAN configuration of our actual VLAN is 192.168.50.10. We have DAG with four DB's on the primary site.
So my concerns are :
Can we move an Exchange Server to another site 10.0.0.1, or it's better to reinstall Exchange from scratch in the new VLAN. After incorporating the server into the site how hard is reconnecting to existing DAG on site 192.168.50.10.
What are the best practices to do so !!
Best regards,

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Stephane