D-Link DIR-505 User Manual page 36

Section 3 - Router Mode
If you selected Dynamic.IP.(DHCP), you will see the following settings.
Host Name: Entering a host name is optional but may be required by
some ISPs. Leave this blank if you are not sure.
Use
Check the box if you are having problems obtaining an IP
Unicasting: address from your ISP.
Primary/ Enter the Primary and secondary DNS server IP addresses
Secondary
assigned by your ISP. These addresses are usually obtained
DNS Server: automatically from your ISP. Leave this setting at 0.0.0.0 if
you did not specifically receive these from your ISP.
MTU:
If you experience connection issues, you may need to
change the MTU setting for optimal performance with your
specific ISP. 1492 is the default MTU.
MAC Address:
If your ISP requires you to enter a MAC address, fill it in here.
You can click the Clone.MAC.button to enter your current
computer's MAC address.
D-Link DIR-505 User Manual 31