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Page 91 / 124 Scroll up to view Page 86 - 90
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
Fine-Tuning Your Network
6-7
v1.0, May 2009
If you suspect an MTU problem, a common solution is to change the MTU size to 1400. If you are
willing to experiment, you can gradually reduce the MTU size from the maximum value of 1500
until the problem goes away.
Table 6-2
describes common MTU sizes and applications.
To change the MTU size:
1.
In the main menu, under Advanced, select
WAN Setup
.
2.
In the
MTU Size
field, enter a new size between 64 and 1500.
3.
Click
Apply
to save the new configuration.
Quality of Service
Quality of Service (QoS) is an advanced feature that can be used to prioritize some types of traffic
ahead of others. The WNR3500v2 router can provide QoS prioritization over the wireless link and
on the Internet connection. To configure QoS, use the QoS Setup screen.
Table 6-2.
Common MTU Sizes
MTU
Application
1500
The largest Ethernet packet size and the default value. This is the typical setting for non-
PPPoE, non-VPN connections, and is the default value for NETGEAR routers, adapters,
and switches.
1492
Used in PPPoE environments.
1472
Maximum size to use for pinging. (Larger packets are fragmented.)
1468
Used in some DHCP environments.
1460
Usable by AOL if you do not have large e-mail attachments, for example.
1436
Used in PPTP environments or with VPN.
1400
Maximum size for AOL DSL.
576
Typical value to connect to dial-up ISPs.
Page 92 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
6-8
Fine-Tuning Your Network
v1.0, May 2009
From the main menu of the browser interface, under Advanced, select
QoS Setup
. The QoS Setup
screen displays:
Using WMM QoS for Wireless Multimedia Applications
The WNR3500v2 router supports Wi-Fi Multimedia Quality of Service (WMM QoS) to prioritize
wireless voice and video traffic over the wireless link. WMM QoS provides prioritization of
wireless data packets from different applications based on four access categories: voice, video,
best effort, and background. For an application to receive the benefits of WMM QoS, both it and
the client running that application must be WMM enabled. Legacy applications that do not support
WMM, and applications that do not require QoS, are assigned to the best effort category, which
receives a lower priority than voice and video.
WMM QoS is enabled by default. You can disable it in the QoS Setup screen, shown in
Figure 6-2
on page 6-8
, by clearing the
Enable WMM
check box and clicking
Apply
.
Configuring QoS for Internet Access
You can give prioritized Internet access to the following types of traffic:
•
For specific applications
•
For specific online games
•
On individual Ethernet LAN ports of the router
•
From a specific device by MAC address
Figure 6-2
Page 93 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
Fine-Tuning Your Network
6-9
v1.0, May 2009
To specify prioritization of traffic, you must create a policy for the type of traffic and add the
policy to the QoS Policy table in the QoS Setup screen. For convenience, the QoS Policy table lists
many common applications and online games that can benefit from QoS handling.
QoS for Applications and Online Gaming
To create a QoS policy for applications and online games:
1.
From the main menu, under Advanced, select
QoS Setup
. The QoS Setup screen displays, as
shown in
Figure 6-2 on page 6-8
.
2.
Click
Setup QoS Rule
. The QoS Priority Rule List displays:
3.
In the QOS Priority Rule List, select an existing item, or you can scroll to the bottom of the list
and select
Add Priority Rule
.
Figure 6-3
Page 94 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
6-10
Fine-Tuning Your Network
v1.0, May 2009
a.
If you chose to add a new entry, the screen expands as shown:
b.
In the
QoS Policy for
field, enter a descriptive name for the new application or game.
c.
Select the packet type, either
TCP,
UDP,
or both (
TCP/UDP
), and specify the port
number or range of port numbers used by the application or game.
4.
From the
Priority
drop-down list, select the priority that this traffic should receive relative to
other applications and traffic when accessing the Internet. The options are Low, Normal, High,
and Highest.
5.
Click
Apply
to save this rule to the QoS Policy list and return to the QoS Setup screen.
6.
In the QoS Setup screen, select the
Turn Internet Access QoS On
check box.
7.
Click
Apply
.
QoS for a Router LAN Port
To create a QoS policy for a device connected to one of the router’s LAN ports:
1.
From the main menu, under Advanced, select
QoS Setup
. The QoS Setup screen displays, as
shown in
Figure 6-2 on page 6-8
.
2.
Click
Add Priority Rule
.
Figure 6-4
Page 95 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
Fine-Tuning Your Network
6-11
v1.0, May 2009
3.
On the QoS - Priority Rules screen, go to the Priority Category field, and select
Ethernet
LAN Port
from the drop-down list:
4.
From the
LAN port
list, select the LAN port that will have a QoS policy.
5.
From the
Priority
drop-down list, select the priority that this port’s traffic should receive
relative to other applications and traffic when accessing the Internet. The options are Low,
Normal, High, and Highest.
6.
Click
Apply
to save this rule to the QoS Policy list and return to the QoS Setup screen.
7.
Click
Apply
.
QoS for a MAC Address
To create a QoS policy for traffic from a specific MAC address:
1.
From the main menu, under Advanced, select
QoS Setup
. The QoS Setup screen displays, as
shown in
Figure 6-2 on page 6-8
.
2.
Click
Add Priority Rule
.
Figure 6-5

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