Draytek Vigor2912 Series User Manual page 139

must have a unique IP address, also they may have a
human-friendly, easy to remember name such as
www.yahoo.com. The DNS server converts the
user-friendly name into its equivalent IP address.
Primary IP Address -You must specify a DNS server IP
address here because your ISP should provide you with
usually more than one DNS Server. If your ISP does not
provide it, the router will automatically apply default DNS
Server IP address: 194.109.6.66 to this field.
Secondary IP Address - You can specify secondary DNS
server IP address here because your ISP often provides you
more than one DNS Server. If your ISP does not provide it,
the router will automatically apply default secondary DNS
Server IP address: 194.98.0.1 to this field.
The default DNS Server IP address can be found via Online
Status:
If both the Primary IP and Secondary IP Address fields are
left empty, the router will assign its own IP address to local
users as a DNS proxy server and maintain a DNS cache.
If the IP address of a domain name is already in the DNS
cache, the router will resolve the domain name immediately.
Otherwise, the router forwards the DNS query packet to the
external DNS server by establishing a WAN (e.g.
DSL/Cable) connection.
Force router to use address for DNS - Force Vigor router
to use DNS servers configured in
LAN1/LAN2/LAN3/LAN4 instead of DNS servers given
by the Internet Access server (PPPoE, PPTP, L2TP or
DHCP server).
Advanced DHCP packets can be processed by adding option number
and data information when such function is enabled.
Enable/Disable – Enable/Disable the function of DHCP
Option. Each DHCP option is composed by an option
129 Vigor2912 Series User's Guide