NETGEAR DGND3300 user manual Changing the MTU Size, Choose your settings

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RangeMax Dual Band Wireless-N Modem Router DGND3300 User Manual

• Microwave ovens (no closer than 10 feet)

Choose your settings.

Use a scanning utility to determine what other wireless networks are operating nearby, and choose an unused channel.

Turn off SSID broadcast, and change the default SSID. Other nearby devices might automatically try to connect to your network several times a second, which can cause significant performance reduction.

Use WMM to improve the performance of voice and video traffic over the wireless link.

Changing 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 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 the technical support of either the ISP or NETGEAR recommends changing the MTU setting. These might require an MTU change:

A secure website that won’t 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.

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Fine-Tuning Your Network

v1.0, March 2009

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Contents NETGEAR, Inc Product Registration, Support, and Documentation TrademarksStatement of Conditions Certificate of the Manufacturer/ImporterEurope EU Declaration of Conformity FCC Information to User FCC Guidelines for Human ExposureFCC Declaration Of Conformity FCC Radio Frequency Interference Warnings & InstructionsProduct and Publication Details Contents Chapter Protecting Your Network Appendix B Related Documents Index V1.0, March About This Manual Conventions, Formats, and ScopeHow to Use This Manual How to Print This ManualRevision History Publication Revision HistoryVersion Date Description V1.0 March Original publication Xiv Chapter Configuring Your Internet Connection Using the Setup ManualLogging In to Your Modem Router Document in Preparing Your Network in Appendix BV1.0, March Using the Setup Wizard Viewing or Manually Configuring Your ISP Settings ISP does not require login Basic Settings screen fields Settings DescriptionGet Automatically from ISP. Your ISP uses Dhcp to Configuring Adsl Settings XxxxxxxxxxxxV1.0, March V1.0, March Chapter Safeguarding Your Network Planning Your Wireless NetworkWireless Placement and Range Guidelines See Manually Configuring Your Wireless Settings onWireless Security Options Wireless data Security options Range up to 300 foot radiusManually Configuring Your Wireless Settings Wireless Settings Configuring WEP Wireless Security WPA-802.1xNetwork Key 8-63 characters Security Options section, select the WEP radio button Configuring WPA, WPA2, or Mixed WPA2 + WPA Wireless Security V1.0, March Using Push N Connect WPS to Configure Your Wireless Network Using a WPS Button to Add a WPS Client Using PIN Entry to Add a WPS Client Configuring Advanced WPS Settings Adding More WPS Clients Adding Both WPS and Non-WPS Clients Restricting Access to Your Modem Router Enable Wireless Router RadioV1.0, March V1.0, March Protecting Access to Your Modem Router Chapter Protecting Your NetworkRestricting Access by MAC Address Changing the Built-In PasswordSelect the Turn Access Control On checkbox Blocking Access to Internet Sites V1.0, March Firewall Rules Adding or Editing Firewall Service Rules Field Outbound Rules Inbound RulesBlocking Access to Internet Services V1.0, March Scheduling Blocking Viewing Logs of Web Access or Attempted Web Access Log Entry DescriptionsField Description Configuring E-mail Alert and Web Access Log Notifications Setting the Time V1.0, March Chapter Using Network Monitoring Tools Upgrading the FirmwareManually Checking for Firmware Upgrades V1.0, March Viewing Modem Router Status Information Modem Router Status Fields DhcpConnection Status Connection Status Settings StatisticsModem Router Statistics Viewing a List of Attached Devices Managing the Configuration File Backing Up and Restoring the ConfigurationErasing the Configuration Running Diagnostic Utilities and Rebooting the Modem Router Enabling Remote Management Access Select the Turn Remote Management On check boxV1.0, March V1.0, March Chapter Customizing Your Network Settings Using the LAN Setup OptionsLAN Setup SettingsLAN TCP/IP Using the Modem Router as a Dhcp Server Address ReservationUsing a Dynamic DNS Service Select the Use a Dynamic DNS Service check box Configuring the WAN Setup Options WAN Setup SettingsSetting Description Setting Up a Default DMZ Server WAN PortSetting up Quality of Service QoS Configuring QoS for Internet AccessQoS for Applications and Online Gaming QoS for a Router LAN Port QoS for a MAC Address Editing or Deleting an Existing QoS Policy Configuring Static Routes V1.0, March Wireless Repeating Also Called WDS Wireless Repeating Function Setting Up the Base Station Setting Up a Repeater Unit Fill in the Base Station MAC Address fieldV1.0, March Chapter Fine-Tuning Your Network Assessing Your Speed Requirements Optimizing Your Network Bandwidth Theoretical Transfer Time for 1 GigabyteNetwork Connection Theoretical Raw Transfer Time RangeMax Dual Band Wireless-N Modem Router Optimizing Wireless Performance Identify critical wireless linksChoose your settings Changing the MTU SizeUniversal Plug and Play Common MTU SizesApplication V1.0, March Chapter Troubleshooting Quick TipsQuick Tips Recommendation InstructionsTroubleshooting with the LEDs Troubleshooting with the LEDs Situation Recommended ActionCannot Access the Router Menu Cannot Access the Internet Checking the ConfigurationChecking the WAN IP Address V1.0, March Troubleshooting a Network Using the Ping Utility Testing the LAN Path to Your RouterTesting the Path from Your Computer to a Remote Device Ping -n 10 IP addressProblems with Date and Time Wireless ConnectivityViewing Available Networks Restoring the Factory Configuration Settings Using the Restore Factory Settings ButtonTable A-1. Default Configuration Settings Feature Default Setting Router loginInternet connection Local network LANTechnical Specifications Table A-1. SpecificationsFeature Default Setting Wireless Power AdapterInterface Specifications EnvironmentalRegulatory Compliance Appendix B Related Documents Document LinkV1.0, March Index Index-2 Index-3 Index-4