D-Link DIR-301 manual Troubleshooting

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Section 6 - Troubleshooting

You should start at 1472 and work your way down by 10 each time. Once you get a reply, go up by 2 until you get a fragmented packet. Take that value and add 28 to the value to account for the various TCP/IP headers. For example, lets say that 1452 was the proper value, the actual MTU size would be 1480, which is the optimum for the network we’re working with (1452+28=1480).

Once you find your MTU, you can now configure your router with the proper MTU size.

To change the MTU rate on your router follow the steps below:

Open your browser, enter the IP address of your router (192.168.0.1) and click OK.

Enter your username (admin) and password (blank by default). Click OK to enter the web configuration page for the device.

Click on Setup and then click Manual Configure.

To change the MTU enter the number in the MTU field and click the Save Settings button to save your settings.

Test your email. If changing the MTU does not resolve the problem, continue changing the MTU in increments of ten.

D-Link DIR-301 User Manual

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Contents Page Table of Contents Troubleshooting Wireless Basics Wireless SecurityNetworking Basics RegistrationProductPackageOverviewContents Introduction Features Hardware Overview ConnectionsLAN Ports LEDs Power LEDLocal Network LEDs Status LEDBefore you Begin InstallationWireless Installation Considerations Connect to Cable/DSL/Satellite Modem Connect to Another Router Installation Web-based Configuration Utility ConfigurationClick Launch Internet Connection Setup Wizard to begin Setup WizardConfiguration Configuration Configuration Dynamic Cable Internet SetupPPPoE DSL Pptp L2TP Big Pond Static assigned by ISP Wireless Settings Network Settings Dhcp Server Settings Port Forwarding Rules Application Rules Dhcp Client Network FilterWebsite Filter Configure Website Select Turn Website Filtering OFF, TurnFirewall Settings CTS Mode Advanced Wireless SettingsAdvanced Network Settings IP Address Port Administrator SettingsTime Settings System Settings Firmware Upgrade System Check Device Information Log Stats Wireless StatsSupport What is WEP? Wireless SecurityNext to Security Mode, select Enable WEP Security Configure WEPWhat is WPA? Configure WPA-PSK Configure WPA Radius Using Windows XP Connect to a Wireless NetworkConfigure WEP Connecting to a Wireless Network Configure WPA-PSK Connecting to a Wireless Network Why can’t I access the web-based configuration utility? TroubleshootingWhat can I do if I forgot my password? Troubleshooting Troubleshooting Wireless Basics Wireless Local Area Network Wlan What is Wireless?Wireless Personal Area Network Wpan HomeSmall Office and Home Office Eliminate Interference Centralize your router or Access PointSecurity Wireless ModesCheck your IP address Networking BasicsStep Highlight Internet Protocol TCP/IP and click Properties StepStandards Technical SpecificationsHumidity Contacting Technical Support