TP-Link TD-W9970 User Manual page 25

Gateway (Optional): Enter the gateway IP address in dotted-decimal notation provided by

your ISP.
DNS Server/ Secondary DNS Server:

The router will use this DNS Server for priority.
Default Gateway:

gateway.
Enable IPv6: Check the box to enable IPv6.

IPv6 Address: Enter the IPv6 address provided by your ISP.

Prefix Length: Enter the prefix length of the IPv6 address. The default value is 64.

IPv6 Gateway: Enter the gateway IPv6 address provided by your ISP.

IPv6 DNS Server / Secondary IPv6 DNS Server:

one) manually. The route will use this IPv6 DNS Server for priority.
IPv6 Default Gateway:

gateway.
Click Advance, you can see the advanced selections of WAN Service Setup.
MTU (Bytes): Maximum Transmission Unit Size. Check this box then you can change the

MTU size. The default
default value unless required by your ISP.
Enable NAT: This technology translates the IP addresses of a local area network to a different

IP address for the Internet. If this modem router is hosting your network's connection to the
Internet, please select the check box. If another router exists in your network, you don't need
to select the option.
Enable Fullcone NAT:

Enable SPI Firewall:

firewall, or else without a firewall.
Enable IGMP Proxy:

multicasting on TCP/IP networks. Some ISPs use IGMP to perform remote configuration for
client devices, such as the modem router. The default value is disabled, and if you are not
sure, please contact your ISP or just leave it.
Click Save to make the settings effective.
2) Dynamic IP
Select this option, and the modem router can obtain IP network information dynamically from a
DHCP server provided by your ISP.
Here you can set DNS Server (at least one) manually.
Select a WAN Interface from the drop-down list as the IPv4 default
Select a WAN Interface from the drop-down list as the IPv6 default
MTU value is 1500 Bytes. It is not recommended that you change the
It is a type of NAT. If not enabled, the default NAT will act.
A SPI firewall enhances network's security. Select the option to use a
IGMP (Internet Group Management Protocol) is used to manage
Here you can set IPv6 DNS Server (at least
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TD-W9970 User Guide