Netgear 08200083 Manual Do Utilizador

5-20

Fine-Tuning Your Network

2. Select the radio button next to the QoS policy to be edited or deleted, and do one of the 

following:

•

Click Delete to remove the QoS policy.

•

Click Edit to edit the QoS policy. Follow the instructions in the preceding sections to 
change the policy settings.

3. Click Apply in the QoS Setup screen to save your changes.

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 must 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 
value might fix one problem but cause another. Leave MTU unchanged unless one of these 
situations occurs:

•

You have problems connecting to your ISP, or other Internet service, and either the technical 
support of the ISP or of NETGEAR recommends changing the MTU size. These might require 
an MTU change:

–

A secure Web site that will not open, or displays only part of a Web page

–

Yahoo  e-mail

–

MSN

–

America Online’s DSL service

•

You use VPN and have severe performance problems.

•

You 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 Web sites, secure login pages, 
or FTP or POP servers.