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The
router
automatically detects the information in the following fields:
•
Router’s IPv6 Address on WAN
.This field shows the IPv6 address that is acquired for the
router
’s
WAN (or Internet) interface. The number after the slash (/) is the length of the prefix, which is also
indicated by the underline (_) under the IPv6 address. If no address is acquired, the field displays
Not Available.
•
Router’s IPv6 Address on LAN
.This field shows the IPv6 address that is acquired for the
router
’s
LAN interface. The number after the slash (/) is the length of the prefix, which is also indicated by
the underline (_) under the IPv6 address. If no address is acquired, the field displays Not Available.
6.
In the
Login
field, enter the login information for the ISP connection.
This is usually the name that you use in your email address. For example, if your main mail account
is [email protected], you would type JerAB in this field. Some ISPs (like Mindspring, Earthlink, and
T-DSL) require that you use your full email address when you log in. If your ISP requires your full
email address, type it in this field.
7.
In the
Password
field, enter the password for the ISP connection.
8.
In the
Service Name
field, enter a service name.
If your ISP did not provide a service name, leave this field blank.
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
Note
terminated, for example, when the modem is turned off, the
router
attempts to
Specify Your Internet Settings
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Nighthawk AC1900 Smart WiFi Router Model R6900
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reestablish the connection immediately after the PPPoE connection becomes available
again.
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
47
Nighthawk AC1900 Smart WiFi Router Model R6900
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•
A secure website that does not open or displays only part of a web page
•
Yahoo email
•
MSN portal
•
America Online’s DSL service
•
You use VPN and experience severe performance problems.
•
You used a program to optimize MTU for performance reasons and now you are experiencing
connectivity or performance problems.
If you suspect an MTU problem, a common solution is to change the MTU to 1400. If you are willing to
experiment, you can gradually reduce the MTU from the maximum value of 1500 until the problem goes
away. The following table describes common MTU sizes and applications.
Table 3. Common MTU sizes
Application
MTU
The largest Ethernet packet size. This setting is typical for connections that do
not use PPPoE or VPN and is the default value for
NETGEAR
routers, adapters,
and switches.
1500
Used in PPPoE environments.
1492
Maximum size to use for pinging. (Larger packets are fragmented.)
1472
Used in some DHCP environments.
1468
Usable by AOL if you do not send or receive large email attachments, for example.
1460
Used in PPPoA environments.
1458
Used in PPTP environments or with VPN.
1436
Maximum size for AOL DSL.
1400
Change the MTU Size
Warning
An incorrect MTU setting can cause Internet communication problems. For
example, you might not be able to access certain websites, frames within
Specify Your Internet Settings
48
Nighthawk AC1900 Smart WiFi Router Model R6900
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websites, secure login pages, or FTP or POP servers. Change the MTU only
if you are sure that it is necessary for your ISP connection.
To change the MTU size:
1.
Launch a web browser from a computer or WiFi device that is connected to the network.
2.
Enter
.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and password are
case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Setup > WAN Setup
.
The WAN Setup page displays.
5.
In the
MTU Size
field, enter a value from 64 to 1500.
The normal MTU (maximum transmit unit) value for most Ethernet networks is 1500 bytes, 1492 bytes
for PPPoE connections, or 1436 for PPTP connections.
6.
Click the
Apply
button.
Your settings are saved.
Specify Your Internet Settings
49
Nighthawk AC1900 Smart WiFi Router Model R6900
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4
Optimize Performance
You can set up the
router
to optimize performance for applications such as multiplayer gaming, peer-to-peer
connections, or real-time communications such as instant messaging. By default, the
router
uses Wi-Fi
Multimedia Quality of Service (WMM QoS).
This chapter contains the following sections:
•
Prioritize Internet Traffic With Quality of Service
on page 51
•
Optimize Internet Gaming With Upstream QoS
on page 51
•
Add Upstream QoS Priority Rules
on page 53
•
Optimize Video Streaming With Downstream QoS
on page 61
•
Add Downstream QoS Priority Rules
on page 62
•
Improve Network Connections With Universal Plug and Play
on page 67
•
Manage Wi-Fi Multimedia Quality of Service
on page 68
50

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