NETGEAR D500 and D1500 user manual Manage the MTU Size, MTU Concepts

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N150 and N300 WiFi DSL Modem Routers

If your ISP did not provide a service name, leave this field blank.

Note: The default setting of the Connection Mode menu is Always On to provide a steady IPv6 connection. The modem router never terminates the connection. If the connection is terminated, for example, when the modem is turned off, the modem router attempts to reestablish the connection immediately after the PPPoE connection becomes available again.

10.Select an IP Address Assignment radio button:

•Use DHCP Server. The modem router assigns IPv6 addresses to the devices on your home network (the LAN) through a DHCP server. This method passes more information to LAN devices, but some IPv6 systems might not support the DHCv6 client function. This is the default setting.

•Auto Config. The modem router automatically configures its IPv6 address based on the IPv6 protocol.

11.(Optional) Select the Use This Interface ID check box and specify the interface ID that you want to be used for the IPv6 address of the modem router’s LAN interface.

If you do not specify an ID here, the modem router generates one automatically from its MAC address.

12.(Optional) Change the NAT filtering mode:

•Secured. In secured mode, the modem router inspects both TCP and UDP packets.

•Open. In open mode, the modem router inspects UDP packets only. This is the default mode.

13.Click the Apply button. Your settings are saved.

Manage the MTU Size

The maximum transmission unit (MTU) is the largest data packet a network device transmits.

MTU Concepts

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.

Manage the Internet Settings Manually

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Contents N150 WiFi DSL Modem Router-Essentials Edition Support ComplianceTrademarks Contents Manage the WiFi Network Settings Appendix a Supplemental Information Router Your package contains the following items Unpack Your Modem RouterFollowing table describes the LEDs from right to left Top Panel with LEDsAdsl Modem router product label Bottom Panel Product LabelInstall and Access the Modem Router and Its Network Position Your Modem Router WiFi Connection Wired ConnectionTypes of Logins Before You Connect to the Modem RouterNetgear genie Automatic Setup Utility and Setup Wizard DSL Service Set Up Your Modem Router for DSL ServiceModem router cabling for DSL service  To connect your modem router to a DSL serviceInstall and Access the Modem Router and Its Network Set Up Your Modem Router for Cable or Fiber Service Modem router cabling for cable or fiber service  To connect your modem router to a cable or fiber serviceInstall and Access the Modem Router and Its Network WAN physical interface changing. Please wait Install and Access the Modem Router and Its Network  To log in to the modem router  To change the password for the user name admin Change the admin Password and Automatic Login Time-OutChange the Language  To change the languageInstall and Access the Modem Router and Its Network Manage the Internet Settings Manually  To use the Setup Wizard Use the Internet Setup Wizard After Initial SetupManage the Internet Settings Manually Specify an Internet Connection Without a Login Manually Set Up the Internet ConnectionInternet IP Address Field DescriptionDomain Name Server DNS Address Router MAC AddressNAT Network Address Translation Manage the Internet Settings Manually Or Manually Connect From the Encapsulation menu, select PPPoE PPP over EthernetManage the Internet Settings Manually From the Encapsulation menu, select PPPoA PPP over ATM Specify an IPv6 Internet Connection IPv6 Internet Connections and IPv6 AddressesField Description Internet IP Address Set Up an IPv6 6to4 Tunnel Connection Manage the Internet Settings Manually Set Up an IPv6 Pass-Through Connection Set Up an IPv6 Fixed Connection To set up an IPv6 pass-through Internet connection  To set up a fixed IPv6 Internet connection  To set up an IPv6 Internet connection with a Dhcp server Set Up an IPv6 Dhcp ConnectionManage the Internet Settings Manually  To set up an IPv6 PPPoE Internet connection Set Up an IPv6 PPPoE ConnectionManage the Internet Settings Manually MTU Concepts Manage the MTU SizeApplication Change the MTU Size To change the MTU size Manage the WiFi Network Settings Manage the Basic WiFi Settings and WiFi Security Field Description Wireless Network N300 WiFi DSL Modem Router Model D1500 N150 WiFi DSL Modem Router ModelDescription Security Options Field To configure WPA/WPA2 enterprise security Configure WPA/WPA2 Enterprise WiFi Security To configure WEP security Configure WEP Legacy WiFi SecurityManage the WiFi Network Settings Manage the WiFi Radio  To manage the WiFi radio  To manage advanced WiFi features Manage Advanced WiFi FeaturesTransmit Power Control menu Set Up the Modem Router as a Wireless RepeaterFollowing figure shows a wireless repeating scenario Select the Enable Wireless Repeating Function check box Settings  To view or change the DSL setup Manage the Adsl SettingsManage the WAN and LAN Network Settings Manage the WAN and LAN Network Settings  To change the default WAN security settings Manage the WAN Security SettingsManage Igmp Proxying and VPN Pass-Through Manage NAT Filtering  To change the default NAT filtering settingsManage the WAN and LAN Network Settings Manage the Application Level Gateway  To change the default ALG settings To change the LAN TCP/IP settings Manage the Modem Router’s LAN IP AddressLAN IP address  To change the router’s device name Change the Modem Router’s Device NameManage the Dhcp Server Address Pool  To disable the built-in Dhcp server Disable the Built-In Dhcp ServerClear the Use Router as Dhcp Server check box Set Up and Manage Static Routes To set up a static route Set Up a Static RouteField Description Remove a Static Route Change a Static Route To change a static route  To remove a static routeTo manage Universal Plug and Play Manage Universal Plug and PlayManage the WAN and LAN Network Settings Manage the Modem Router Monitor the Traffic  To check for new firmware and update your modem router Update the Firmware of the Modem RouterManually Check for New Firmware and Update the Modem Router D1500-V1.0.0.141.0.1PE.img Manage the Configuration File of the Modem Router Back Up the Settings To back up the modem router’s configuration settings  To restore configuration settings that you backed up Restore the SettingsReturn the Modem Router to Its Factory Default Settings Use the Reset Button To reset the modem router to factory default settings  To erase the settings Erase the SettingsView the Status and Statistics of the Modem Router Field Description Router Information Wireless Settings Internet PortModem View the Traffic Statistics Field or Column Description View or Change a PPPoE or PPPoA Internet Connection  To view or change the TCP/IP Internet connection status View or Change a TCP/IP Internet Connection To view modem router status View the xDSL Line Status and Modem StatisticsManage the Modem Router and Monitor the Traffic View Devices Currently on the Network  To display the wired and WiFi devicesProduct label Troubleshooting Problem Possible Solution Quick Tips for TroubleshootingPower LED Is Off WiFi LED Is OffTroubleshoot with the LEDs LAN LED Is Off You Cannot Log In to the Modem RouterTroubleshoot the DSL Link Troubleshoot the Internet ConnectionInternet LED Is Off Obtain an Internet IP Address To check the Internet IP address  To verify that your PPPoE or PPPoA connection is working Troubleshoot PPPoE or PPPoATroubleshoot Internet Browsing Changes Are Not Saved Troubleshoot the WiFi ConnectivityTest the LAN Path to Your Modem Router Troubleshoot Your Network Using the Ping Utility To ping the modem router from a Windows computer PingTest the Path from Your Computer to a Remote Device Supplemental Information Feature Default Behavior Factory SettingsFeature Description Technical and Environmental SpecificationsSupplemental Information 114