your ISP connection. For more information about changing the MTU size, see Change the MTU Size on page
6. Select an IPv6 Domain Name Server (DNS) Address radio button:
Get Automatically from ISP. Your ISP uses DHCP to assign your DNS servers. Your ISP automatically
assigns this address.
Use These DNS Servers. If you know that your ISP requires specific servers, select this option. Enter the
IP address of your ISP’s primary DNS server. If a secondary DNS server address is available, enter it also.
7. Select an IP Address Assignment radio button:
Use DHCP Server. This method passes more information to LAN devices but some IPv6 systems might not
support the DHCPv6 client function.
Auto Config. This is the default setting.
This setting specifies how the router assigns IPv6 addresses to the devices on your home network (the LAN).
8. (Optional) Select the Use This Interface ID check box and specify the interface ID that you want to be used for
the IPv6 address of the router’s LAN interface.
If you do not specify an ID here, the router generates one automatically from its MAC address.
9. Click the Apply button.
Your settings are saved.
Change the MTU Size
The maximum transmission unit (MTU) is the largest data packet a network device transmits. When one network
device communicates across the Internet with another, the data packets travel through many devices along the way.
If a device in the data path uses a lower MTU setting than the other devices, the data packets must be split or
“fragmented” to accommodate the device with the smallest MTU.
The best MTU setting for NETGEAR equipment is often the default value. In some situations, changing the value
fixes one problem but causes another. Leave the MTU unchanged unless one of these situations occurs:
You experience problems connecting to your ISP or other Internet service, and the technical support of either
the ISP or NETGEAR recommends changing the MTU setting. These web-based applications might require an
MTU change:
A secure website that does not open, or displays only part of a web page
Yahoo email
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