NETGEAR D6300 user manual Common MTU sizes

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D6300 WiFi DSL Modem Router

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, 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 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 such as the inability 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 until the problem goes away. The following table describes common MTU sizes and applications.

Table 9. 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 WiFi DSL
	modem 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 email 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.

NETGEAR genie ADVANCED Home

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Contents WiFi DSL Modem Router Trademarks SupportCompliance Contents USB Printer Control Administration Appendix a Supplemental Information Hardware Setup Get to know your wireless routerProduct Highlights Product Specifications Weee Box contents Unpack Your New RouterHardware Features LabelWAN port Reset button USB port Gigabit Ethernet Power Adsl line LAN portsAC power Back PanelPower DSL Internet Wireless USB Front PanelD6300 WiFi DSL Modem Router Power On/Off LED Wireless On/Off button WPS On/Off button USB port Side PanelPosition Your Wireless Router D6300 WiFi DSL Modem Router Wireless buttonAdsl Microfilters One-Line Adsl Microfilter Not IncludedSummary Cable Your D6300 WiFi DSL Modem RouterTwo-Line Adsl Microfilter Included Cabling diagram Verify the CablingGet Started with Netgear genie Wireless Devices and Security Settings Prepare to Set Up the WiFi DSL Modem RouterTypes of Logins and Access Use Standard TCP/IP Properties for DhcpBrowse to http//routerlogin.net Netgear genie Setup To use Netgear genie to set up your WiFi DSL modem router  If the browser cannot display the webUse Netgear genie after Installation Upgrade WiFi DSL Modem Router FirmwareWiFi DSL Modem Router Dashboard Basic Home Screen Manual Method Add Wireless Devices or Computers to Your NetworkWi-Fi Protected Setup WPS Method  To connect manually To use WPS to join the wireless network Netgear genie Basic Settings Your Internet connection and networkDoes Your ISP Require a Login? Answer either yes or no Internet Basic SettingsInternet Basic Settings Screen Fields Internet IP Address Attached Devices Parental Controls USB Storage Basic Settings ReadySHARE USB Storage and PrinterBasic Wireless Settings ReadySHARE PrinterWireless Settings Screen Fields  To view or change basic wireless settingsWireless Network Security Options SettingsChange WPA Security Option and Passphrase Under Security Options, select the WPA option you want To set up a guest network Guest NetworksGuest Network Wireless Security Options Netgear genie App  To install the genie mobile app Netgear genie Mobile AppSpecify custom settings Netgear genie Advanced HomeSetup Wizard Netgear genie Advanced Home Select either Push Button or PIN Number WPS Wizard To use the WPS Wizard Setup Menu Adsl Setup WAN Setup Change the MTU Size Default DMZ Server To set up a default DMZ server Common MTU sizes  To change the LAN settings LAN Setup To change the MTU size Select Advanced Setup WAN Setup LAN Setup Screen Settings LAN TCP/IP SetupAddress Reservation Use the WiFi DSL Modem Router as a Dhcp ServerUse Router as a Dhcp Server  To reserve an IP address Quality of Service SetupAddress Reservation Enable WMM QoS for Wireless Multimedia Applications Set Up QoS for Internet AccessQoS for Applications and Online Gaming  To create a QoS policy for applications and online gamesQoS for a WiFi DSL Modem Router LAN Port Click the Add Priority Rule buttonClick Add Priority Rule QoS for a MAC AddressEdit or Delete an Existing QoS Policy  To edit or delete a QoS policyAccess and configure a USB storage drive USB StorageReadySHARE Access USB Drive RequirementsStore Files in a Central Location for Printing File-Sharing ScenariosShare Photos  To share files with your friends and familyUSB Storage Basic Settings Share Large Files over the Internet To access your USB device Add or Edit a Network FolderUSB Storage Advanced Settings Safely Remove a USB Drive Available Network FoldersMedia Server Settings Specify Approved USB Devices Ftp//10.1.65.4 Connect to the USB Drive from a Remote ComputerSelect the Allow only approved devices check box Access and configure a USB printer USB Printer ControlUSB Printer Control Control Center Configuration USB PrinterScan with a Multifunction Printer Keep unwanted content out of your Security To specify a trusted computer Keyword Blocking of Http Traffic To delete a keyword or domain Firewall Rules  To create firewall rulesSecurity Add Custom Services to Allow or Block  To add a custom service TCP UDP TCP/UDPSchedule for Firewall Rules  To specify the firewall rule schedule To set up email notifications Security Event Email NotificationsAdministration Manage your networkUpgrade the WiFi DSL Modem Router Firmware Internet Port View WiFi DSL Modem Router StatusRouter Information LAN PortShow Statistics Button System up time and poll interval statisticsWireless Settings 2.4 GHz and 5 GHz Connection Status ButtonView Logs of Web Access or Attempted Web Access Guest Network 2.4 GHz and 5 GHzManage the Configuration File  To restore configuration settings that you backed up Back Up SettingsRestore Configuration Settings Do not interrupt the reboot processSet Password Password RecoveryDiagnostics Administration Advanced Settings Fine-tuning your networkAdvanced Wireless Settings Advanced Settings Advanced Settings Wireless Repeating Function WDS Wireless repeating scenarioWireless Repeating Function  To set up the base station Set Up the Base StationSet Up a Repeater Unit Port Forwarding and Triggering Remote Computer Access Basics To configure the WiFi DSL modem router as a repeater unit Advanced Settings 100 Port Triggering to Open Incoming Ports Port Forwarding to Permit External Host Communications Set Up Port Forwarding to Local Servers How Port Forwarding Differs from Port Triggering To set up port forwarding Add a Custom Service Edit or Delete a Port Forwarding EntryApplication Example Making a Local Web Server Public Set Up Port TriggeringClick Edit Service or Delete Service  To make a local web server publicAdvanced Settings 107 Dynamic DNS Static Routes  To set up Dynamic DNSSelect the Use a Dynamic DNS Service check box Advanced Settings 110 Advanced Settings 111 Remote Management Universal Plug and Play  To turn on Universal Plug and PlayAdvanced Settings 114 Traffic Meter  To set up an IPv6 Internet connection typeIPv6 Advanced Settings 116 USB Settings Troubleshooting Diagnose and solve problemsQuick Tips Wireless SettingsNetwork Settings Sequence to Restart Your NetworkTroubleshoot with the LEDs Power LED Is Off or BlinkingPower LED Stays Red Internet or Ethernet Port LEDs Are Off Wireless LEDs Are OffLEDs Never Turn Off Push N Connect WPS Button Blinks GreenCannot Access the Internet Cannot Log In to the RouterTroubleshooting 123  To troubleshoot a PPPoE connection Troubleshoot PPPoETroubleshoot Internet Browsing Incorrect Date or Time Wireless ConnectivityChanges Not Saved Wireless Signal Strength Restore the Factory Settings and PasswordTroubleshoot Your Network Using the Ping Utility Test the LAN Path to Your Router Test the Path from Your Computer to a Remote DeviceTroubleshooting 128 Specifications Supplemental InformationFactory Settings Factory default settingsTechnical Specifications D6300 WiFi DSL Modem Router Factory default settingsSupplemental Information 132 Index 133134 135 136

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