Common MTU Sizes | NETGEAR WNDR3800 specs

N600 Wireless Dual Band Gigabit Router Premium Edition WNDR3800

•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.

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 2. 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 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.

To change the MTU size:

1.Select Advanced > Setup > WAN Setup.

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

3.Click Apply to save the settings.

Genie Advanced Home

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NETGEAR WNDR3800 user manual  To change the MTU size Select Advanced Setup WAN Setup, Common MTU Sizes

Contents

USA Statement of Conditions Technical SupportTrademarks Contents Genie Advanced Home Administration Appendix a Supplemental Information Hardware Setup ReadySHARE Premium FeaturesVideo Mode ClearChannel Selector TiVo Support Review the box contents Hardware Setup Unpack Your New Router Front Panel Prepare the Router for InstallationHardware Features LED Descriptions Back Panel Label Position Your Wireless Router Getting Started with Netgear Genie Wireless Devices and Security Settings Router Setup PreparationTypes of Logins and Access Use Standard TCP/IP Properties for Dhcp Browse to http//routerlogin.net Netgear Genie Setup To use Netgear Genie to set up your router Use Netgear Genie after Installation Upgrade Router Firmware Router Dashboard Basic Home Screen  To use WPS to join the wireless network Add Wireless Devices or Computers to Your NetworkWi-Fi Protected Setup WPS Method Manual Method Genie Basic Settings Does Your ISP Require a Login? Answer either yes or no Internet SetupInternet Setup Screen Fields Internet IP Address Attached Devices Parental Controls ReadySHARE USB Storage Basic Wireless Settings Region Selection Wireless Settings Screen Fields To view or change basic wireless settings Change WPA Security Option and Passphrase Wireless Network GHz b/g/n and 5.0 GHz a/nSecurity Options Settings  To set up a guest network Guest Networks  To set up a video network Set Up a Video NetworkGuest Network Wireless Security Options WPA Encryption Genie Basic Settings Genie Advanced Home Setup Wizard Select either Push Button or PIN Number WPS WizardSelect Advanced WPS Wizard Setup Menu WAN Setup Change the MTU Size Default DMZ Server To set up a default DMZ server, do the following  To change the MTU size Select Advanced Setup WAN Setup Common MTU Sizes LAN Setup  To change the LAN settings LAN Setup Screen Settings Use the Router as a Dhcp Server Address Reservation  To reserve an IP address Set Up QoS for Internet Access Quality of Service QoS SetupEnable WMM QoS for Wireless Multimedia Applications QoS for Applications and Online Gaming  To create a QoS policy for applications and online games QoS for a Router LAN Port Click the Add Priority Rule button QoS for a MAC Address Click Add Priority Rule Editing or Deleting an Existing QoS Policy  To edit or delete a QoS policy USB Storage Safely Remove a USB Drive ReadySHARE AccessUSB Drive Requirements Storing Files in a Central Location for Printing File Sharing ScenariosSharing Photos  To share files with your friends and family Basic Settings Sharing Large Files over the Internet Add or Edit a Network Folder  To set up ReadySHARE Cloud ReadySHARE Cloud Click Register  To set up a ReadySHARE account To register the router with a ReadySHARE Cloud account  To access USB contents remotely USB Control Center Utility  To set up ReadySHARE PrinterReadySHARE Printer USB Storage Control Center Configuration USB Printer  To control a USB speaker Scan with a Multi-Function PrinterUSB Speaker USB Storage Advanced Settings Available Network Folders Media Server Settings Play WNDR3800 Media on TiVo with ReadyDLNA  To play videos On the TiVo, select TiVo Central My Shows Select what you want to play or watch Specify Approved USB Devices Copy TiVo Files onto a Computer Connect to the USB Drive from a Remote Computer Access the Router’s USB Drive Remotely Using FTP To connect to the router’s USB drive using a Web browser Select the Allow only approved devices check box USB Storage Security  To specify a trusted computer Keyword Blocking of Http Traffic To delete a keyword or domain Block Services Port Filtering  To block services Security Schedule Blocking  To schedule blocking  To set up email notifications Security Event Email Notifications Administration Upgrade the Router Firmware Router Information Internet Port WAN SetupView Router Status Hardware Version. The router model Statistics Button System up time and poll interval statistics Connection Status Button View connection status information Wireless Settings 2.4 GHz and Wireless Settings 5 GHz Guest Network 2.4 GHz and Guest Network 5 GHz View Logs of Web Access or Attempted Web Access Restore Configuration Settings Manage the Configuration FileBack up Settings Do not interrupt the reboot process Erase Set Password To restore configuration settings that you backed up Password Recovery Time Machine Set Up Time Machine To set up Time Machine Access the Connected USB Hard Drive  To access the drive Before You Back up a Large Amount of Data Administration Select Guid Partition Table or Master Boot Record MBR Change the Partition Scheme Advanced Settings Advanced Wireless Settings Wireless Repeating Function WDS AP Mode Wireless repeating scenario Wireless Repeating Function Set Up the Base Station  To set up the base station Set Up a Repeater Unit  To configure the router as a repeater unit Remote Computer Access Basics Port Forwarding and Triggering Port Triggering to Open Incoming Ports Destination port number Advanced Settings Port Forwarding to Permit External Host Communications How Port Forwarding Differs from Port Triggering Set Up Port Forwarding to Local Servers To set up port forwarding Add a Custom Service Application Example Making a Local Web Server Public Click Edit Service or Delete ServiceEditing or Deleting a Port Forwarding Entry  To edit or delete a port forwarding entry Set Up Port Triggering Universal Plug and Play on 103 Dynamic DNS 105 Static Routes  To set up a static route Remote Management USB Settings Universal Plug and Play  To turn on Universal Plug and Play  To set up an IPv6 Internet connection type IPv6 Traffic Meter Troubleshooting Quick Tips Power LEDWireless Settings Sequence to Restart Your Network Power LED Is Off or Blinking Troubleshooting with the LEDsNetwork Settings LEDs Never Turn Off Internet or Ethernet Port LEDs Are Off Wireless LED Is OffCannot Log In to the Router Cannot Access the Internet Incorrect Date or Time Wireless ConnectivityChanges Not Saved Wireless Signal Strength Supplemental Information Factory Default Settings  To restore the factory default settings 122 Technical Specifications WNDR3800 Router Specifications Europe EU Declaration of Conformity Netgear Dual Band WirelessRegulatory Compliance Information 125 FCC Requirements for Operation in the United States FCC Caution Avertissement Industry CanadaImportant Note Radiation Exposure Statement Index 129 130 131