Advanced Settings (Part 2)
132
N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2
• Copying machines, elevators, and cell phones (no closer than 6 feet)
• Micro
wave ovens (no closer than 10 feet)
• Choos
e your settings.
- Use a
scanning utility to determine what other wireless networks are operating
nearby, and choose an unused channel.
- T
urn off SSID broadcast, and change the default SSID. Other nearby devices might
automatically try to connect to your network several times a second, which can cause
significant performance reduction.
• Use W
MM to improve the performance of voice and video traffic over the wireless link.
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 any device in the data path has a lower
MTU setting than the other devices, the data packets need to be split or “fragmented” to
accommodate the one with the smallest MTU.
The best MTU setting for NETGEAR equipment is often just the default value, and changing
the valu
e might fix one problem but cause another. Leave MTU unchanged unless one of
these situations occurs:
• Y
ou have 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
might require an MTU change:
- A secure web
site that will not open, or displays only part of a Web page
- Y
ahoo e-mail
- MSN
- America Online’
s DSL service
• Y
ou use VPN and have severe performance problems.
• Y
ou used a program to optimize MTU for performance reasons, and now you have
connectivity or performance problems.
Note: An incorrect MTU setting can cause Internet communication
problems such as the inability to access certain Web sites, frames
within websites, secure login pages, or FTP or POP servers.
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
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