Netgear R6900 - Nighthawk AC1900 Smart WiFi Router User Manual (en)

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The default setting of the Connection Mode menu is Always On to provide a steady IPv6
connection. The router never terminates the connection. If the connection is terminated, for
example, when the modem is turned off, the router attempts to reestablish the connection
immediately after the PPPoE connection becomes available again.
Note
9.
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.
10.
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 DHCv6 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).
11.
(Optional) Select the Use This Interface ID check box and specify the interface ID 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.
12.
Click the Apply button.
Your settings are saved.
Manage the MTU Size
The maximum transmission unit (MTU) is the largest data packet a network device transmits.
MTU Concepts
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 maximum transmission unit (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:
Specify Your Internet Settings
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Nighthawk AC1900 Smart WiFi Router Model R6900