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I am trying to document the steps to restore the DHCP server to another in an emergency in case if the existing server fails.<br />
I read few kb articles and found it looks simple procedure, they are about restoring the backup and authorizes the new DHCP. We have NAP server in place and DHCP is running on a DC also. <br />
Should we have to give new DHCP server with the same IP as the old server? I am the concerned here because if the existing DC went down then the AD will still have the information about that server. In an emergency, I would not have time to clean the metadata, I guess &nbsp;I should not give the same IP as the old DC's. Does the old IP matter to DHCP clients?
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I am trying to document the steps to restore the DHCP server to another in an emergency in case if the existing server fails.
I read few kb articles and found it looks simple procedure, they are about restoring the backup and authorizes the new DHCP. We have NAP server in place and DHCP is running on a DC also. 
Should we have to give new DHCP server with the same IP as the old server? I am the concerned here because if the existing DC went down then the AD will still have the information about that server. In an emergency, I would not have time to clean the metadata, I guess  I should not give the same IP as the old DC's. Does the old IP matter to DHCP clients?

Restore DHCP server and NAP server

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for manual setup by a network administrator. The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s).

DHCP

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.