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TD-8817 ADSL2+ Ethernet/USB Modem Router User Guide
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Primary DNS Server: Type in your preferred DNS server.
Secondary DNS Server: Type in your preferred DNS server.
Note:
If Use Auto Discovered DNS Server Only is selected in DNS Relay, this router will accept the
first received DNS assignment from one of the PPPoA, PPPoE or MER/DHCP enabled PVC(s)
during the connection establishment. If Use User Discovered DNS Server Only is selected in
DNS Relay, it is necessary for you to enter the primary and optional secondary DNS server IP
addresses. After type in the address, click SAVE button to save it and invoke it.
DHCP Relay: Select Relay, then you will see the next screen (shown in Figure 4-17), the
modem rout
er will work as a DHCP Relay. A DHCP relay is a computer that forwards DHCP
data between computers that request IP addresses and the DHCP server that assigns the
addresses. Each of the device's interfaces can be configured as a DHCP relay. If it is enabled,
the DHCP requests from local PCs will forward to the DHCP server runs on WAN side. To
have this function working properly, please run on Router mode only, disable the DHCP
server on the LAN port, and make sure the routing table has the correct routing entry.
Figure 4-17
DHCP Server IP for Relay Agent: Enter the DHCP server IP Address runs on WAN
side.
Note:
If you select Disabled, the DHCP function will not take effect.