General Configuration
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After you install and start the DHCP service, you must create a scope (a range of valid IP addresses that are available for leasing to DHCP clients). Each DHCP server in your environment should have at least one scope which does not overlap with another DHCP server scope in your environment.
Normally, the server is authorized when the server is first added to the DHCP console during installation and configuration of the DHCP service. If you install and configure the DHCP service on a member server or standalone server, however, you must configure the DHCP server.
To authorize a DHCP server, proceed as follows:
1. In the Windows Start menu, select Start > Programs > Administrative Tools > DHCP.
You must be logged on to the server with an account that is a member of the "Organization administrators" group.
2. In the DHCP console menu, select the new DHCP server. If there is a red arrow in the lower right corner of the server object, the server has not been authorized yet.
3. Right-click the server, and then click Authorize.
4. After a few moments, right-click the server again, and then click Refresh. The server should now be shown with a green arrow in the lower right corner, which indicates that the server has been authorized.
To create a new scope, proceed as follows:
1. In the Windows Start menu, select Start > Programs > Administrative Tools > DHCP.
In the console structure, select the DHCP server on which you want to create a new DHCP scope.
2. Right-click the server and then left-click New Scope.
3. In the scope creation wizard, click Next and then enter a name and description for the scope. You can choose any name but it should provide a good description of the purpose of the new scope in the network. For example, you could enter "Client addresses in the administration building".
4. Enter the address range that can be used as a lease in this scope, for example, from the starting IP address 192.168.100.1 to the end address 192.168.100.100. Because these addresses will be issued to clients, they should all be valid addresses in the network that are not currently in use. If you want to use another subnet mask, enter the new subnet mask. Click Next.
5. Enter all IP addresses that should be eliminated from the scope that you entered. This includes all addresses that may have already been statically assigned to different computers in your organization. Click Next.
6. Enter the number of days, hours, and minutes after which an IP address lease from this scope expires. This specifies the time period for which a client can hold a leased address without having to renew it. Click Next.
7. Select Yes, I want to configure these options now and then extend the wizard to add settings for the most common DHCP options. Click Next.
8. Enter the IP address of the standard gatekeeper that should be used by clients that have received an IP address from this scope.
9. Click Add to include the standard gatekeeper address in the list, and then click Next.
If there are already DNS servers in the network, enter your organization’s domain name in the Parent Domains field. Enter the name of the DNS server and then click Resolve to ensure that the DHCP server can set up a connection to the DNS server and determine its address. Then click Add to include this server in the list of DNS servers that are assigned to the DHCP clients. Click Next.
10. Click Yes, I want to activate this scope now to activate the scope and allow clients to take leases from the scope.
11. Click Next and Finish.
