You can configure clients to use DHCP to obtain IP addresses.
Choose Apple > System Preferences, then click Network.
Select the network connection for your account (such as Ethernet) in the network connection services list.
Click the Configure IPv4 pop-up menu, then choose Using DHCP.
Choose Apple > System Preferences, then click Network.
Select the network connection for your account (such as Ethernet) in the network connection services list.
Click the Configure IPv4 pop-up menu, then choose one of the following methods:
Manually: Enter the IP address, subnet mask, router, and DNS information in the relevant fields.
Using DHCP with manual address: Enter the IP address in the relevant fields.
If your DHCP server is using static mapping, configure client computers to use DHCP. When your client computers connect to your network they will always obtain the same IP address. The static mapping uses the MAC address of the client computer to determine the IP address the client gets assigned to.