TD-W8960N 
Wireless N ADSL2+ Modem Router User Guide
¾Enable IGMP Multicast Proxy: IGMP (Internet Group Management Protocol) is used to manage multicasting on TCP/IP networks. Some ISPs use IGMP to perform remote configuration for client devices, such as the Router. The default value is disabled, and if you are not sure, please contact your ISP or just leave it.
5.Select a preferred wan interface as the system default gateway.
Figure
6.Configure the DNS Server Addresses on the screen as follows.
Figure
¾Obtain DNS info from a WAN Interface: You can select this option to automatically get DNS server information from the selected WAN interface.
¾Use the following Static DNS IP Address: You can select this option to manually enter the primary and /or optional secondary DNS server IP addresses provided by your ISP.
)Note:
If only single PVC with IPoA is configured, you must enter static DNS server IP addresses.
7.On the next screen you will see the detailed settings you’ve made. Please click the Apply/Save button to save these settings.
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