D-Link DSL-2540U User Manual page 23

Section 3 – Configuration
QUICK SETUP - PPPoA
This window allows you to enter an IP address and subnet mask for the
LAN interface. In addition, you can either enable or disable the DHCP
server.
To enable the DHCP server, enter a starting IP address, an ending IP
address, and a subnet mask. You may also choose to change the default
value of the leased time. Click the Next button to continue.
D-Link DSL-2540U User Manual 23