NETGEAR WNR1000v3h2 Overview of Home and Small Office Networking Technologies, Common MTU Sizes

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N150 Wireless Router User Manual

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.

If you suspect an MTU problem, a common solution is to change the MTU size to 1400. If you are willing to experiment, you can gradually reduce the MTU size from the maximum value of 1500 until the problem goes away. Table 1 describes common MTU sizes and applications.

Table 1. Common MTU Sizes

MTU	Application

1500	The largest Ethernet packet size and the default value. This is the typical setting for
	non-PPPoE, non-VPN connections, and is the default value for NETGEAR routers,
	adapters, and switches.

1492	Used in PPPoE environments.

1472	Maximum size to use for pinging. (Larger packets are fragmented.)

1468	Used in some DHCP environments.

1460	Usable by AOL if you do not have large e-mail attachments, for example.

1436	Used in PPTP environments or with VPN.

1400	Maximum size for AOL DSL.

576	Typical value to connect to dial-up ISPs.

To change the MTU size:

1.In the main menu, under Advanced, select WAN Setup.

2.In the MTU Size field, enter a new size between 64 and 1500.

3.Click Apply to save the new configuration.

Overview of Home and Small Office Networking Technologies

Common connection types and their speed and security considerations are:

•Broadband Internet. Your Internet connection speed is determined by your modem type, such as ADSL or cable modem, as well as the connection speed of the sites to which you connect, and general Internet traffic. ADSL and cable modem connections are asymmetrical, meaning they have a lower data rate to the Internet (upstream) than from the Internet (downstream). Keep in mind that when you connect to another site that also has an asymmetrical connection, the data rate between your sites is limited by each side’s upstream data rate. A typical residential ADSL or cable modem connection provides a downstream throughput of about 1 to 3 megabits per second (Mbps). Newer

74 Chapter 5: Fine-Tuning Your Network

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Contents N150 Wireless Router WNR1000v3h2 Statement of Conditions Technical SupportTrademarks Revision HistoryTable of Contents Customizing Your Network Settings Troubleshooting Using the Setup Manual Configuring Basic ConnectivityLogging In To Your Wireless Router Configuring Basic Connectivity Selecting a Language for Your Screen Display Configuring Basic Connectivity Your Internet Connection Does Not Require a Login Configuring Your Internet Settings Using the Setup WizardViewing and Configuring Basic Internet Settings No login required Your Internet Connection Does Require a Login Login required Configuring Basic Connectivity Setting Up and Testing Basic Wireless Connectivity Configuring Basic Connectivity Click Setup Access List Safeguarding Your Network Safeguarding Your NetworkChoosing Appropriate Wireless Security To configure the wireless network, you can Wireless Security Options Other Features That Enhance SecurityRecording Basic Wireless Settings Setup Information If WEP Authentication is used, circle one Shared Key or AutoChanging Wireless Security Settings Viewing Basic Wireless SettingsSafeguarding Your Network Configuring WEP Wireless Security Safeguarding Your Network Configuring WPA-PSK and WPA2-PSK Wireless Security Viewing Advanced Wireless Settings Using Push N Connect Wi-Fi Protected Setup Push Button Configuration Using the Physical Push ButtonUsing the Router’s Security PIN Security PIN EntryConfiguring the WPS Settings Using the Wireless Client’s Security PINAdding Additional WPS-Enabled Clients Restricting Wireless Access by MAC Address Adding Additional Non-WPS-Enabled ClientsSelect the Turn Access Control On check box Adding Guest Networks To add a guest network, do the followingChanging the Administrator Password Backing Up Your Configuration Understanding Your Firewall Restricting Access From Your Network Content Filtering OverviewBlocking Access to Internet Sites Blocking Access to Internet Services To block access to Internet services Blocking Services by IP Address Range Scheduling BlockingViewing Logs of Web Access or Attempted Web Access Log Entry DescriptionsConfiguring E-mail Alert and Web Access Log Notifications Setting the Time Zone Using the LAN IP Setup Options Customizing Your Network SettingsConfiguring a Device Name Configuring LAN TCP/IP Setup ParametersUsing the Router as a Dhcp Server Using Address ReservationTo edit or delete a reserved address entry Using a Dynamic DNS ServiceTo reserve an IP address Click Edit or DeleteSelect the Use a Dynamic DNS Service check box Configuring the WAN Setup OptionsTo configure for a Dynamic DNS service Setting Up a Default DMZ Server Disabling Port Scan and DoS ProtectionConfiguring NAT Filtering Configuring Static RoutesSetting the MTU Size Responding to a Ping on the Internet WAN PortTo add or edit a static route Customizing Your Network Settings Fine-Tuning Your Network Allowing Inbound Connections to Your NetworkFine-Tuning Your Network How Port Triggering Changes the Communication Process Web server then sends this reply message to your routerHow Port Forwarding Changes the Communication Process Configuring Port Forwarding to Local Servers How Port Forwarding Differs from Port TriggeringAdding a Custom Service To configure port forwarding to a local serverApplication Example Making a Local Web Server Public Click Edit Service or Delete Service to make changesEditing or Deleting a Port Forwarding Entry To edit or delete a port forwarding entryConfiguring Port Triggering Clear the Disable Port Triggering check box Using Universal Plug and Play To turn on Universal Plug and PlayOptimizing Wireless Performance Reduce interference Identify critical wireless linksChoose your settings Using WMM QoS for Wireless Multimedia Applications Using WMM for Wireless Multimedia ApplicationsQuality of Service To create a QoS policy for applications and online games Configuring QoS for Internet AccessQoS for Applications and Online Gaming Click Setup QoS Rule and then click Add Priority Rule QoS for a Router LAN PortQoS for a MAC Address Editing or Deleting an Existing QoS Policy Click Setup QoS RuleChanging the MTU Size Overview of Home and Small Office Networking Technologies Common MTU SizesAssessing Your Speed Requirements Theoretical Transfer Time for 1 Gigabyte Network Connection Theoretical Raw Transfer TimeUsing Network Monitoring Tools Using Network Monitoring ToolsViewing Wireless Router Status Information Wireless Router Status FieldsDhcp Click Connection Status to display the connection status Connection Status Settings Router StatisticsViewing a List of Attached Devices Rx B/sDo not interrupt the reboot process Managing the Configuration FileBacking Up and Restoring the Configuration Updating the Router Firmware Erasing the ConfigurationChecking for New Firmware in the Router Upgrade Screen Using Network Monitoring Tools Updating Manually to New Router Firmware Select the Turn Remote Management On check box Enabling Remote Management AccessTo configure your router for remote management Using Network Monitoring Tools Traffic Meter To monitor traffic on your router, do the followingUsing Network Monitoring Tools Be sure to restart your network in this sequence TroubleshootingQuick Tips Check the Test light to verify correct router operation Troubleshooting Basic FunctionsMake sure that the Ethernet cables are securely plugged Power light stays amber Power light is not onPower light blinks green slowly and continuously Internet light stays amberLogin Problems Internet or LAN port lights are not onChecking the Internet Service Connection Obtaining an Internet IP AddressTroubleshooting PPPoE Troubleshooting Internet BrowsingTroubleshooting Your Network Using the Ping Utility Testing the LAN Path to Your RouterTesting the Path from Your Computer to a Remote Device Request timed outProblems with Date and Time Problems with Wireless Adapter ConnectionsRestoring the Default Configuration and Password These procedures erase all current configuration settingsAppendix a Technical Specifications Default Configuration SettingsWNR1000v3h2 Router Default Configuration Settings Wireless Communication General Specifications WNR1000v3h2 Router General SpecificationsReference Documents Appendix B Related DocumentsRegulatory Compliance Information FCC Requirements for Operation in the United StatesEdoc in Languages of the European Community Europe EU Declaration of ConformityFCC Caution Pertinentes de la directive 1999/5/CE Interference Reduction Table Interference Reduction TableIndex IndexIndex PIN 32, 34 ping 54 Setup Manual