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NETGEAR PR2000 user manual Change the MTU Size, Common MTU sizes

Models: PR2000

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Trek N300 Travel Router and Range Extender PR2000

Change 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 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.

WARNING:

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.

Leave the MTU unchanged unless one of these situations occurs:

•You have problems connecting to your ISP or other Internet service, and 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.

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. This value is the typical setting for non-PPPoE, non-VPN
	connections, and is the default value for NETGEAR Treks, 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.

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NETGEAR PR2000 user manual Change the MTU Size, Common MTU sizes

Contents

Netgear Trek N300 Travel Router and Range Extender Trademarks SupportCompliance Contents Security Appendix a Supplemental Information Get to know your Trek Hardware SetupPosition Your Trek Unpack Your TrekPrepare Your Trek  To prepare your Trek for installationGet to Know Your Netgear Trek Internet Mode SwitchNetgear Indicator LEDsUSB Connection Ports and Reset ButtonNetgear Power InputsProduct Label Antenna OrientationDifferent Ways You Can Connect to the Internet WiFi Connection at a Public Hotspot SetupWiFi hotspot connection  To connect to a public WiFi hotspotWiFi Range Extender Setup DON’T  To use the Trek as a WiFi range extender To connect to the Internet with an Ethernet cable Internet Connection at Home SetupHardware Setup  To use the Trek as a WiFi bridge WiFi Bridge SetupHardware Setup Connect to the Trek Get Started with Netgear genieTypes of Logins and Access Trek Setup PreparationWireless Devices and Security Settings Use Standard TCP/IP Properties for Dhcp To use Netgear genie to set up your Trek Netgear genie Setup To view or change the settings for the Trek Use Netgear genie After InstallationChange the Password Upgrade the Trek FirmwareSelect Advanced Administration Set Password Password Recovery To recover your password  To set up password recoveryManual Method Add Wireless Devices or Computers to Your Trek To connect WiFi devices manually to your Trek Click Advanced WPS Wizard Wi-Fi Protected Setup Method To connect WiFi devices to your Trek with WPS Push Button recommended. Click the button Genie mobile app home screen Netgear genie App and Mobile genie AppYour Internet connection and network Genie Basic Settings To view or change the Internet setup Internet SetupWired WAN Connection Router Mode Select Basic Internet Internet Service Provider. Select PPPoE, L2TP, or PptpWired WAN Connection Wireless AP Mode  To view or change the Internet setup Genie Basic Settings Wireless WAN Connection WiFi Mode Select the To save a name for profile check box Basic Wireless Settings To view or change basic wireless settings Select Basic Wireless Change the Wireless Security Option Netgear recommends that you do not disable security  To change the WPA settingsSelect Basic Attached Devices Attached Devices To view the attached devices  To view or delete the saved profile settings Profile SettingsSelect Basic Profile Settings Genie Advanced Home Specify custom settings To launch the Setup Wizard Setup WizardClick the Take me to the Internet button Select Advanced Setup WAN Setup WAN Setup To change the WAN settings Default DMZ Server  To set up a default DMZ server Common MTU sizes Change the MTU Size To change the MTU size LAN SetupSelect Advanced Setup LAN Setup  To change the LAN settingsUse the Trek as a Dhcp Server  To disable the Dhcp server feature  To reserve an IP address Set Up Address Reservation To edit or delete a reserved address entry Wi-Fi Multimedia Quality of Service for Wireless Traffic Quality of Service Setup To set up QoS Quality of Service Priority Rules and Internet AccessScroll down Genie Advanced Home Genie Advanced Home Genie Advanced Home Enhance your local network USB PortEnhance Your Local Network Connect or Safely Remove a USB Drive Set Up Network Storage To connect a USB storage device  To remove a USB disk drive safely To view basic information about the USB storage device View or Configure a USB DriveSelect Basic ReadySHARE Configure the USB Storage Device and Access Settings To view or change the USB storage advanced settings Select Basic ReadySHARE  To view network folders Configure the Available Network Folders To add a network folder Click the Create Network Folder button  To edit a network folder Specify Approved USB Devices  To set up approved USB devicesSelect the Allow only approved devices check box Access and Share Your Network StorageCommon Uses of Network Sharing Share Photos and Multimedia  To map the USB device to a local Windows network drive Access Your USB Storage Device Locally To access the USB drive with FTP from a remote computer Access Your USB Storage Device Remotely To access the USB drive from a remote computer  To set up ReadySHARE Printer Set Up a Network PrinterUSB Port USB Port USB Port USB Port Power or Recharge a USB Device Security Keep unwanted content out of your To block services Port Filtering to Block ServicesDefined Select Advanced Security Block ServicesSelect Advanced Security Schedule Schedule Blocking To schedule blocking Security Event Email Notifications  To set up email notificationsSecurity Manage your network AdministrationRouter Information Pane View Trek Status To view Trek status and usage information  To display the Router Information pane To display the Internet Port pane Internet Port PaneLAN Port Statistics  To view the traffic statistics  To view and manage the connection status Connection StatusAdministration  To display the Wireless Settings pane Wireless Settings PaneAdministration 101  To view and manage the logs Specify Log SettingsSelect Advanced Administration Logs  To specify log settings Restore Configuration Settings Manage the Configuration FileBack Up Settings  To erase the configuration settings Erase the Current Configuration SettingsDo not interrupt the reboot process  To check for new firmware and update your Trek Update the Trek FirmwareSelect Advanced Administration Firmware Update Fine-tune your network Advanced SettingsControl the Wireless Radio Advanced Wireless Settings To turn the wireless radio on or off Select Advanced Advanced Setup Wireless Settings To configure and enable the wireless schedule Set Up a Wireless Schedule To specify WPS settings View or Change WPS SettingsAdvanced Settings 112  To restrict access based on MAC addresses Set Up a Wireless Access List by MAC AddressSelect the Turn Access Control On check box Dynamic DNS  To set up Dynamic DNSStatic Routes Select Advanced Advanced Setup Dynamic DNSSelect the Use a Dynamic DNS Service check box Select Advanced Advanced Setup Static Routes  To set up a static route To edit or delete a static route Remote Management  To set up remote managementAdvanced Settings 120  To turn on Universal Plug and Play Select Advanced Advanced Setup UPnPUniversal Plug and Play  To monitor Internet traffic Traffic MeterClick Advanced Advanced Setup Traffic Meter Select Advanced Advanced Setup Traffic Meter Advanced Settings 125 Diagnose and solve problems TroubleshootingTroubleshoot with the LEDs Quick TipsInternet Port LED is Off Power LED Is OffLEDs Never Turn Off Cannot Log In to the Trek WiFi LED is Off To check the WAN IP address Cannot Access the InternetSelect Administration Router Status  To troubleshoot a PPPoE connection Troubleshoot PPPoETroubleshoot Internet Browsing  To display the current date and time Changes Not SavedIncorrect Date or Time Wireless Connectivity Troubleshoot Your Network Using the Ping Utility Restore the Factory Settings and Password To ping the Trek from a running Windows computer Test the LAN Path to Your TrekTest the Path from Your Computer to a Remote Device Troubleshooting 137 View the Trek specs Supplemental InformationFactory default settings Factory SettingsPR2000 Trek specifications Technical SpecificationsSupplemental Information 141 142 Index143 144 145