One possible solution to ensure that all DHCP clients that get an IP address from SRV1 will be configured to use DC1 as a DNS server is to use the DHCP scope options. DHCP scope options are settings that apply to all DHCP clients that obtain an IP address from a specific scope. You can use the DHCP scope options to specify the DNS server IP address, as well as other parameters such as the default gateway, the domain name, and the DNS suffix. Here are the steps to configure the DHCP scope options on SRV1:
On SRV1, open DNS Manager from the Administrative Tools menu or by typing dnsmgmt.msc in the Run box.
In the left pane, expand your DHCP server and click on IPv4.
In the right pane, right-click on the scope that you want to configure and select Properties.
In the Scope Properties dialog box, click on the DNS tab.
Check the box Enable DNS dynamic updates according to the settings below. This option allows the DHCP server to register and update the DNS records for the DHCP clients.
Select the option Always dynamically update DNS records. This option ensures that the DHCP server updates both the A and PTR records for the DHCP clients, regardless of whether they request or support dynamic updates.
Check the box Discard A and PTR records when lease is deleted. This option allows the DHCP server to delete the DNS records for the DHCP clients when their leases expire or are released.
Check the box Dynamically update DNS records for DHCP clients that do not request updates. This option allows the DHCP server to update the DNS records for the DHCP clients that do not support dynamic updates, such as legacy or non-Windows clients.
In the DNS servers section, click on the Add button to add a new DNS server IP address.
In the Add Server dialog box, enter the IP address of DC1, which is the DNS server that you want to use for the DHCP clients, and click Add.
Click OK to close the Add Server dialog box and return to the Scope Properties dialog box.
Click OK to apply the changes and close the Scope Properties dialog box.
Now, all DHCP clients that get an IP address from SRV1 will be configured to use DC1 as a DNS server. You can verify the DNS configuration by using the ipconfig /all command on a DHCP client computer and checking the DNS Servers entry. You can also check the DNS records for the DHCP clients by using the DNS Manager console on DC1.
