Draytek VigorAP 810 User Manual page 45

DHCP server you are going to use so the Relay Agent can help to
forward the DHCP request to the DHCP server.
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 modem 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 modem will
automatically apply default secondary DNS Server IP address:
194.98.0.1 to this field.
After finishing this web page configuration, please click OK to save the settings.
VigorAP 810 User's Guide
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