Netgear AC1900 Nighthawk™ Owner's Manual

The best MTU setting for NETGEAR equipment is often the default value. In some situations, 
changing the value fixes one problem but causes another. Leave the MTU unchanged unless 
one of these situations occurs:

You experience 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 web-based applications might require an MTU change:

A secure website that does not open, or displays only part of a web page

Yahoo email

MSN portal

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.

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.

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Launch an Internet browser from a computer or wireless device that is connected to the 

network.

Type http://www.routerlogin.net or http://www.routerlogin.com.

A login screen displays.

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 screen displays.

Select ADVANCED > Setup > WAN Setup.