Edimax Technology AR-7286WNB user manual You can choose Use Auto Discovered DNS Server Only, Field

Field		Description
Mask		subnet mask is from 255.255.0.0 to 255.255.255.254.
Alias IP		You may enter the second IP Address.
Address
Alias Subnet		You may enter a second subnet mask.
Mask
Dynamic		You can select RIP1, RIP2-Bor RIP2-M.
Route
Direction		You can select None, Both, IN Only or OUT Only.
		IGMP (Internet Group Multicast Protocol) is a session-
		layer protocol used to establish membership in a
Multicast		multicast group. The ADSL Router supports both IGMP
		version 1 (IGMP v1) and IGMP version 2 (IGMP v2).
		Select Disabled to disable it.
		You may select Enabled or Disabled. After activating this
IGMP Snoop		function, the packets of the IGMP broadcast will not be
		sent to the LAN interface not belonging to the group.
		You can choose Disabled, Enabled or Relay. If set to
		DHCP Server, the router can assign IP addresses, IP
DHCP		default gateway and DNS Servers to the host under
		Windows95, Windows NT and other operating systems
		that support the DHCP client.
Starting IP		The starting IP address for the DHCP server's IP
Address		assignment.
IP Pool Count		The max user pool size.
		The lease time determines the period that the host
Lease Time		retains the assigned IP addresses before the IP
		addresses change. The default is 259200 seconds.
Physical Ports		When no port is selected, the LAN PC can’t get an IP
		from the router.
DNS Relay		You can choose Use Auto Discovered DNS Server Only
		or Use User Discovered DNS Server Only. If you select
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