NETGEAR (LG2200D) Change the MTU Size

Specify Network Settings

43

U.S. Cellular® 4G LTE™ Router (LG2200D)

•MTU Size (in bytes). The normal MTU (maximum transmit unit) value for most

Ethernet networks is 1500 bytes, or 1492 bytes for PPPoE connections. Change the

MTU only if you are sure that it is necessary for your ISP connection. For more

information, see Change the MTU Size .

•NAT Filtering. Network Address Translation (NAT) determines how the router

processes inbound traffic. Secured NAT protects computers on the LAN from attacks

from the Internet, but might prevent some Internet games, point-to-point applications,

or multimedia applications from working. Open NAT provides a much less secured

firewall, but allows almost all Internet applications to work.

5. Click the Apply button.

Your changes 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 has a lower MTU

setting than the other devices, the data packets have to be split or “fragmented” to

accommodate the device with the smallest MTU.

The best MTU setting for NETGEAR equipment is often just the default value. In some

situations, changing the value fixes one problem but causes another. Leave the MTU setting

unchanged unless one of these situations occurs:

•You have problems connecting to your ISP or other Internet service, and the ISP

technical support 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.

Note: An incorrect MTU setting can cause Internet communication

problems. For instance, you might not be able to access certain

websites, 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

Contents

Main Page Contents Chapter 1 Hardware Setup Chapter 2 Connect to the Network and Access the Router Chapter 3 Specify Your Internet Settings Chapter 4 Control Access to the Internet Chapter 5 Specify Network Settings Chapter 6 USB Storage Chapter 7 ReadySHARE Printer Chapter 8 Administration Chapter 9 Troubleshooting Chapter 10 Set Up an Ethernet WAN Internet Connection Appendix A Supplemental Information Page Page Unpack Your Router Hardware Setup U.S. Cellular 4G LTE Router (LG2200D) Front Panel The router front panel has buttons and status LEDs. Use the LEDs to verify status and connections. WiFi WPSPower Internet USBLANSignal WAN Quality Figure 2. Router front view Table 1. LED and button descriptions Rear Panel Attach the Antennas Find the Best Spot for Your Router Page Seat a SIM Card Page Connect to the Network Wired Connection WiFi Connection Label Types of Logins Use an Internet Browser to Access the Router Page Use the Internet Setup Wizard Specify Mobile Broadband Internet Settings SIM Card PIN Code Settings Page Page Parental Controls Page Use Keywords to Block Internet Sites Page Block Services from the Internet Page Schedule When to Block Internet Sites and Services Avoid Blocking on a Trusted Computer Set Up Security Event Email Notifications Page Port Forwarding to Permit External Host Communications Set Up Port Forwarding to a Local Server Add a Custom Port Forwarding Service Edit a Port Forwarding Entry Delete a Port Forwarding Entry Application Example: Make a Local Web Server Public How the Router Implements the Port Forwarding Rule Set Up Port Triggering Add a Port Triggering Service Enable Port Triggering Application Example: Port Triggering for Internet Relay Chat Page Page View WAN Settings Change the MTU Size Set Up a Default DMZ Server Change the Routers Device Name Change the LAN TCP/IP Settings Page Specify the IP Addresses that the Router Assigns Disable the DHCP Server Feature in the Router Reserve LAN IP Addresses Page Quality of Service Setup WMM QoS for Wireless Multimedia Applications Set Up QoS for Internet Access QoS for Applications and Online Gaming Page QoS for a Router LAN Port QoS for a MAC Address Edit a QoS Policy Delete a QoS Policy Use the WPS Wizard for WiFi Connections Specify Basic WiFi Settings Page Change the WiFi Security Option Control the Wireless Radios Use the WiFi On/Off Button Enable or Disable the Wireless Radios Set Up a Wireless Schedule Specify WPS Settings Set Up a Wireless Distribution System Page Set Up the Base Station Set Up a Repeater Page Page Access a USB Storage Device Page File-Sharing Scenarios Share Photos Store Files in a Central Location for Printing Share Large Files over the Internet View a USB Device Attached to the Router USB Storage Device Network and Access Settings Page Available Network Folders Page Specify Approved USB Devices Safely Remove a USB Drive Page ReadySHARE Printer Page Page Page USB Control Center Utility Control Center Configuration USB Printer Scan with a Multifunction Printer Page Update the Router Firmware LTE Modem Upgrade Change the admin Password Recover the admin Password Reboot the Router View Router Status Page View Mobile Broadband Status Page Show Statistics View Devices Currently on the Network View Logs of Router Activity Manage the Configuration File Back Up the Configuration Settings Restore Configuration Settings Erase the Current Configuration Settings Static Routes Page Remote Management Page Universal Plug and Play Monitor Internet Traffic Page Diagnostics Page Page Troubleshoot with the LEDs Power LED Is Off or Blinking Power LED Stays Amber LEDs Never Turn Off Internet LED Is Off Cannot Log In to the Router Problems with Date and Time Forgotten WiFi Password WiFi Connectivity Troubleshoot Your Network Using the Ping Utility Test the LAN Path to Your Router Test the Path from Your Computer to a Remote Device Connection Cable a WAN Ethernet Internet Connection Specify the Internet Connection Mode Advanced Internet Setup Page Page IPv6 Requirements for Entering IPv6 Addresses Auto Detect IPv6 Auto Config IPv6 6to4 Tunnel Page IPv6 Pass Through IPv6 Fixed Page IPv6 DHCP IPv6 PPPoE Troubleshoot an Ethernet WAN Internet Connection Connect to the Internet Troubleshoot Internet Browsing Page Factory Settings Table 3. Factory default settings Table 3. Factory default settings (continued) Technical Specifications Table 4. LG2200D Router specifications