TP-Link TD-W9970 User Manual page 38

Enable IPv6: Check this box to enable IPv6.

Default Gateway:

gateway.
IPv6 Default Gateway:

gateway.
Click Advance, advanced selections for WAN Service Setup can be shown.
Service Name/Server Name:

your ISP. You can leave them blank, if the ISP doesn't provide them.
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 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.
Use IP address specified by ISP:

provided by your ISP.
Set DNS Server manually:

The modem router will use this DNS server for priority.
Use IPv6 address specified by ISP:

provided by your ISP.
Set IPv6 DNS Server manually:

manually here. The modem router will use this IPv6 DNS Server for priority.
Click Save to make the settings effective.
4) Bridge
If you select this type of connection, the modem router can be configured to act as a bridging
device between your LAN and your ISP. Bridges are devices that enable two or more networks to
communicate as if they are two segments of the same physical LAN.
Select a WAN connection from the drop-down list as the IPv4 default
Select a WAN connection from the drop-down list as the IPv6 default
Enter the Service Name and Server Name if it was provided by
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
Choose this option and you can enter the IP address
Choose this option and you can set DNS Server manually here.
Choose this option and you can enter the IPv6 address
Choose this option and you can set IPv6 DNS Server
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TD-W9970 User Guide