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Page 91 / 128 Scroll up to view Page 86 - 90
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
Fine-Tuning Your Network
5-21
v2.1, July 2007
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.
Table 5-1
describes common MTU sizes and applications.
To change the MTU size:
1.
In the Advanced section of the main menu, click WAN Setup.
2.
Under MTU Size, enter a new size between 64 and 1500.
3.
Click Apply to save the new configuration.
Optimizing Your Network Bandwidth
As your network grows, it may consist of several segments of different networking technologies,
each providing different throughput. In planning your network, you should first consider which
devices will have the heaviest traffic flow between them. Examples are:
•
A media center in one room streaming high-definition video from a server in another room
•
A storage device that is used for backing up your computers
Table 5-1.
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 don't have large email 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 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
5-22
Fine-Tuning Your Network
v2.1, July 2007
Next, consider the throughput of your network devices. Where possible, make the heaviest-traffic
connections using higher-speed technologies, with no lower-speed bottlenecks in the path.
Figure 5-11
shows an example network using multiple networking technologies. In this network,
the two PCs with gigabit (1000 Mbps) Ethernet adapters have a gigabit connection through the
GS605 switch to the storage server. This connection should allow for extremely fast backups or
quick access to large files on the server. The PC connected through a pair of Powerline HD
adapters is limited to the 200 Mbps speed of the Powerline HD connection. Although any of the
links in this example would be sufficient for high-traffic applications such as streaming HD video,
the use of older devices such as 10 Mbps Ethernet or 802.11b wireless would create a significant
bottleneck.
Figure 5-11
Page 93 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
Fine-Tuning Your Network
5-23
v2.1, July 2007
Overview of Home and Small Office Networking
Technologies
Common connection types and their speed and security considerations are:
•
Broadband Internet
Your Internet connection speed is determined by your modem type, such as ADSL or cable
modem, as well as the connection speed of the sites to which you connect, and general Internet
traffic. ADSL and cable modem connections are asymmetrical, meaning they have a lower
data rate
to
the Internet (upstream) than
from
the Internet (downstream). Keep in mind that
when you connect to someone else who also has an asymmetrical connection, the data rate
between your sites is limited by each side’s upstream data rate. A typical residential ADSL or
cablemodem connection provides a downstream throughput of about one to three megabits per
second (Mbps). Newer technologies such as ADSL2+ and Fiber to the Home (FTTH) will
increase the connection speed to tens of Mbps.
•
Wireless
Your RangeMax NEXT Wireless Router WNR834B provides a wireless data throughput of up
to 300 Mbps using technology called Multiple-Input Multiple-Output (MIMO), in which
multiple antennas transmit multiple streams of data. The use of multiple antennas also
provides excellent range and coverage. With the introduction of the newer WPA and WPA2
encryption and authentication protocols, wireless security is extremely strong.
To get the best performance, use RangeMax NEXT adapters such as the WN511B for your
computers. Although the RangeMax NEXT router is compatible with older 802.11b and
802.11g adapters, the use of these older wireless technologies in your network can result in
lower throughput overall (typically less than 10 Mbps for 802.11b and less than 40 Mbps for
802.11g). In addition, many older wireless products do not support the latest security
protocols, WPA and WPA2.
•
Powerline
For connecting rooms or floors that are blocked by obstructions or are distant vertically,
consider networking over your building’s AC wiring. NETGEAR’s Powerline HD family of
products delivers up to 200 Mbps to any outlet, while the older generation XE family of
products delivers 14 Mbps or 85 Mbps. Data transmissions are encrypted for security, and you
can configure an individual network password to prevent neighbors from connecting.
The Powerline HD family of products can coexist on the same network with older generation
XE family products or HomePlug 1.0 products, but they are not interoperable with these
older products.
Page 94 / 128
NETGEAR RangeMax™ NEXT Wireless Router WNR834B User Manual
5-24
Fine-Tuning Your Network
v2.1, July 2007
•
Wired Ethernet
As gigabit-speed Ethernet ports (10/100/1000 Mbps) become common on newer computers,
wired Ethernet remains a good choice for speed, economy, and security. Gigabit Ethernet can
extend up to 100 meters with twisted-pair wiring of CAT-5e or better. A wired connection is
not susceptible to interference, and eavesdropping would require a physical connection to
your network.
Assessing Your Speed Requirements
Because your Internet connection is likely to operate at a much lower speed than your local
network, faster local networking technologies may not improve your Internet experience.
However, many emerging home applications require high data rates. For example:
•
Streaming HD video requires 10 to 30 Mbps per stream. Because latency and packet loss can
disrupt your video, plan to provide at least twice the capacity you need.
•
Streaming MP3 audio requires less than 1 Mbps per stream and does not strain most modern
networks. Like video, however, streaming audio is also sensitive to latency and packet loss, so
a congested network or a noisy link can cause problems.
•
Backing up computers over the network has become popular due to the availability of
inexpensive mass storage.
Table 5-2
shows the time to transfer one gigabyte (1 GB) of data
using various networking technologies.
Note:
Actual data throughput will vary. Network conditions and environmental factors,
including volume of network traffic, building materials and construction, and
network overhead, can lower actual data throughput rate.
Table 5-2.
Theoretical Transfer Time for 1 Gigabyte
Network Connection
Theoretical Raw Transfer Time
Gigabit Wired Ethernet
8 seconds
RangeMax NEXT Wireless-N
26 seconds
Powerline HD
40 seconds
100 Mbps Wired Ethernet
80 seconds
802.11g wireless
150 seconds
802.11b wireless
700 seconds
10 Mbps Wired Ethernet
800 seconds
Cable Modem (3 Mbps)
2700 seconds
Analog Modem (56 kbps)
144,000 seconds (40 hours)
Page 95 / 128
6-1
v2.1, July 2007
Chapter 6
Using Network Monitoring Tools
This chapter describes how to use the maintenance features of your RangeMax NEXT Wireless
Router WNR834B. These features can be found by clicking on the Maintenance heading in the
main menu of the browser interface.
This chapter includes:
•
Viewing Wireless Router Status Information
•
Viewing a List of Attached Devices
•
Managing the Configuration File
•
Erasing the Configuration
•
Upgrading the Router Software
•
Enabling Remote Management Access
Viewing Wireless Router Status Information
To view router status and usage information:
1.
From the main menu of the browser interface, under Maintenance, select Router Status. The
Router Status screen will display.

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