•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
An incorrect MTU setting can cause Internet communication problems. For example, you
might not be able to access certain websites, frames within websites, secure login pages, or
FTP or POP servers.
To change the MTU size:
1. Launch a web browser from a computer or wireless device that is connected to the network.
2. Enter http://www.routerlogin.net.
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.
6. Click the Apply button.
Your settings are saved.
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
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.
Used in PPPoE environments.1492
Specify Your Internet Settings