Change The Mtu Size - NETGEAR C6300 User Manual

• Disable SIP ALG. Some VoIP applications do not work well with the SIP ALG.
Selecting this check box to turn off the SIP ALG might help your VoIP devices to
create or accept a call through the modem router.
6. Click the Apply button.
Your settings are saved.

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 a device in the data path uses a lower MTU
setting than the other devices, the data packets must be split or "fragmented" to
accommodate the device with the smallest MTU.
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 the Internet, and the technical support of either
the Internet provider 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 experience severe performance problems.
• You used a program to optimize MTU for performance reasons and now you are
experiencing connectivity or performance problems.
Note: 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. Type http://routerlogin.net.
A login window opens.
3. Enter the modem router user name and password.
AC1750 WiFi Cable Modem Router
Specify Network Settings
49