Change the MTU Size | NETGEAR D6100 instruction

AC1200 WiFi DSL Modem Router—Essentials Edition Model D6100

Change the MTU Size

WARNING:

An incorrect MTU setting can cause Internet communication problems. For example, you might not be able to access certain websites, frames within websites, secure login pages, or FTP or POP servers. Change the MTU only if you are sure that it is necessary for your ISP connection.

To change the MTU size:

1.Launch an Internet browser from a computer or WiFi device that is connected to the network.

2.Type http://www.routerlogin.net. A login screen displays.

3.Enter the modem router user name and password.

The user name is admin. The default password is password. The user name and password are case-sensitive.

4.Click the OK button.

The BASIC Home screen displays.

5.Select ADVANCED > Setup > WAN Setup. The WAN Setup screen displays.

6.In the MTU Size field, enter a value from 616 to 1500.

The normal MTU (maximum transmit unit) value for most Ethernet networks is 1500 bytes, 1492 bytes for PPPoE connections, or 1436 for PPTP connections.

7.Click the Apply button. Your change is saved.

Manage the Internet Settings Manually

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NETGEAR D6100 user manual Change the MTU Size

Contents

AC1200 WiFi DSL Modem Router- Essentials Edition Trademarks SupportCompliance Contents Manage the WiFi Network Settings Manage the WAN and LAN Network Settings Manage Firewall Rules, Port Forwarding, and Port Triggering Appendix a Supplemental Information Router Your package contains the following items Unpack Your Modem Router Modem router displays status LEDs on the front panel Front Panel with LEDs LED descriptions Power LED turns solid green Modem router back panel Back Panel with Ports, Buttons, and Connector Button Icon Description Right Side Panel with WPS and WiFi On/Off Buttons Modem router product label Bottom Panel Product Label Install and Access the Modem Router and Its Network Position Your Modem Router Before You Connect to the Modem Router Wired ConnectionWiFi Connection Types of Logins Netgear genie Automatic Setup Utility DSL Service Set Up Your Modem Router for DSL Service Modem router cabling for DSL service  To connect your modem router to a DSL service Install and Access the Modem Router and Its Network Install and Access the Modem Router and Its Network Install and Access the Modem Router and Its Network Install and Access the Modem Router and Its Network Install 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 service Install and Access the Modem Router and Its Network Install and Access the Modem Router and Its Network Install and Access the Modem Router and Its Network Install and Access the Modem Router and Its Network Read Troubleshoot the Internet Connection on  To log in to the modem router  To change the language Change the Language Select Advanced Administration Set Password Select the Enable Password Recovery check box Set Up Password RecoveryLet the Modem Router Automatically Update Its Firmware  To set up password recovery  To use the genie app to access the modem router Access the Modem Router with the Netgear genie App Install and Access the Modem Router and Its Network Manage the Internet Settings Manually Select Advanced Setup Wizard Use the Internet Setup Wizard After Initial Setup To use the Setup Wizard Manage the Internet Settings Manually Manage the Internet Settings Manually Manage the Internet Settings Manually Manage the Internet Settings Manually Specify an Internet Connection Without a Login Manually Set Up the Internet Connection Internet IP Address Field Description NAT Network Address Translation Domain Name Server DNS AddressRouter MAC Address Manage the Internet Settings Manually Or Manually Connect Domain Name Server DNS Address From the Encapsulation menu, select PPPoE PPP over Ethernet Enter the settings as described in the following table Internet IP Address From the Encapsulation menu, select PPPoA PPP over ATM Enter the settings as described in the following table Field Description Internet IP Address Specify an IPv6 Internet ConnectionIPv6 Internet Connections and IPv6 Addresses Set Up and IPv6 Connection Through Auto Detect From the Internet Connection Type menu, select Auto Detect From the Internet Connection Type menu, select Auto Config Set Up and IPv6 Connection Through Auto Config Manage the Internet Settings Manually From the Internet Connection Type menu, select 6to4 Tunnel Set Up an IPv6 6to4 Tunnel Connection Manage the Internet Settings Manually  To set up an IPv6 pass-through Internet connection Set Up an IPv6 Pass-Through Connection From the Internet Connection Type menu, select Fixed Set Up an IPv6 Fixed Connection To set up a fixed IPv6 Internet connection Manage the Internet Settings Manually From the Internet Connection Type menu, select Dhcp Set Up an IPv6 Dhcp Connection To set up an IPv6 Internet connection with a Dhcp server Manage the Internet Settings Manually From the Internet Connection Type menu, select PPPoE Set Up an IPv6 PPPoE Connection To set up an IPv6 PPPoE Internet connection Manage the Internet Settings Manually Application Manage the MTU SizeMTU Concepts Change the MTU Size Manage the WiFi Network Settings  To view or change the basic WiFi settings View or Change the Basic WiFi Settings Manage the WiFi Network Settings Field Description Region Selection Wireless Network 2.4GHz b/g/n Field Description Security Options Wireless Network 5GHz 802.11a/n/ac To 173 Mbps  To configure WPA/WPA2 enterprise security Configure WPA/WPA2 Enterprise WiFi Security Manage the WiFi Network Settings  To configure WEP security Configure WEP Legacy WiFi Security Use WPS to Add a Device to the WiFi Network Select Advanced WPS Wizard Use WPS with the Push Button Method Use WPS with the PIN Method Manage the WiFi Network Settings Select Guest Network  To set up a guest network Security Options Profile Field Description Wireless Network 2.4GHz b/g/nEnable Ssid Broadcast check box To access My Local Network check box Ssid Broadcast check box Field Description Wireless Network 5GHz a/n/ac Enable or Disable the WiFi Radios Control the WiFi RadiosUse the WiFi On/Off Button Select Advanced Advanced Setup Wireless Settings  To enable or disable the WiFi radios  To set up the WiFi schedule Set Up a WiFi Schedule Manage the WiFi Network Settings  To manage WPS Settings Manage the WPS Settings  To manage advanced WiFi features Manage Advanced WiFi Features Preamble Mode Transmit Power Control menu Use the Modem Router as a WiFi Access Point To set up the modem router as an AP Select Advanced Advanced Setup Wireless Access Point Control Access to the Internet Select Parental Controls Set Up Parental Controls To set up parental controls Control Access to the Internet Click the Take me to the status screen button Allow or Block Access to Your NetworkEnable and Manage Network Access Control  To set up network access control  To add or remove devices that are allowed Manage Network Access Control Lists Control Access to the Internet 103  To add or remove devices that are blocked Add or Remove Devices from the Blocked List Select Advanced Security Block Sites Set Up Blocking To set up keyword and domain blocking Use Keywords to Block Internet Sites Control Access to the Internet 106  To remove all keywords and domains from the blocked list Remove a Keyword or Domain from the Blocked ListRemove All Keywords and Domains from the Blocked List  To remove a keyword or domain from the blocked list  To specify a trusted device Specify a Trusted Computer  To set up a schedule for blocking Select Advanced Security Schedule  To set up email notifications Set Up Security Event Email Notifications Send logs according to this schedule Field Description Send alerts and logs through e-mailSend Alert Immediately Optimize Performance Optimize Traffic with QoS Select Advanced Setup QoS Setup  To add a QoS rule for a service or application Manage Default and Custom QoS RulesAdd a Custom QoS Rule for a Service or Application Select the Turn Internet Access QoS On check box Optimize Performance 116 From the Applications menu, select Add a new application Field Description Specified Port Range Add a Custom QoS Rule for a Device To add a QoS rule for a device Optimize Performance 118  To change a QoS rule Change a QoS Rule or Change the Priority for a Rule  To remove a QoS rule Remove a QoS Rule  To remove all QoS rules Manage Uplink Bandwidth ControlRemove All QoS Rules Click the OK button Basic Home screen displays  To manage Universal Plug and Play Improve Network Connections with Universal Plug and Play  To disable WMM QoS Manage Wi-Fi Multimedia Quality of Service Settings Select Advanced Setup Adsl Settings Manage the Adsl Settings To view or change the DSL setup  To change the WAN connection preference Change the WAN Connection Preference  To change the default WAN security settings Manage the WAN Security Settings  To set up a default DMZ server Set Up a Default DMZ Server Manage Igmp Proxying and VPN Pass-Through Manage NAT Filtering Enable and Configure a Vlan To change the default NAT filtering settings Manage the SIP Application-Level Gateway  To enable and configure the Vlan To change the default SIP ALG setting Select Advanced Setup WAN Setup Manage Dynamic DNS Set Up a New Dynamic DNS AccountSelect Advanced Advanced Setup Dynamic DNS Specify a DNS Account That You Already Created  To set up Dynamic DNS if you already created an account Select the Use a Dynamic DNS Service check box Manage the Modem Router’s LAN IP Address Settings Select Advanced Setup LAN Setup  To change the LAN IP address settings  To manage the RIP settings Manage the Router Information Protocol Settings  To reserve an IP address Manage Reserved LAN IP AddressesReserve a LAN IP address  To remove a reserved IP address entry Change a Reserved IP AddressRemove a Reserved IP Address Entry  To change a reserved IP address entry  To change the modem router’s device name Change the Modem Router’s Device NameManage the Dhcp Server Address Pool Manage the WAN and LAN Network Settings 141 Clear the Use Router as Dhcp Server check box Disable the Built-In Dhcp Server To disable the built-in Dhcp server  To set up a static route Set Up and Manage Custom Static RoutesSet Up a Static Route Manage the WAN and LAN Network Settings 144  To remove a static route Change a Static RouteRemove a Static Route  To change a static route Manage the WAN and LAN Network Settings 146 Manage the Modem Router Monitor the Traffic  To check for new firmware and update your modem router Update the Firmware of the Modem RouterCheck for New Firmware and Update the Modem Router Manually Upload New Firmware and Update the Modem Router D6100-V1.0.0.340.0.34.img  To back up the modem router’s configuration settings Manage the Configuration File of the Modem RouterBack Up the Settings Restore the Settings  To recover your password Recover the admin Password  To reset the modem router to factory default settings Return the Modem Router to Its Factory Default SettingsUse the Reset Button  To erase the settings Erase the Settings Select Advanced Advanced Home View the Status and Statistics of the Modem Router Field Description Router Information Manage the Modem Router and Monitor the Traffic 156 Internet Port Wireless Settings 2.4GHz Guest Network 2.4GHz Wireless Settings 5.0GHz Guest Network 5.0GHz View the Traffic Statistics Adsl Link Field or Column Description  To view or change the TCP/IP Internet connection status View or Change a TCP/IP Internet Connection Manage the Modem Router and Monitor the Traffic 162 View or Change a PPPoE or PPPoA Internet Connection View or Change a Pptp or L2TP Internet Connection  To manage which activities are logged and view the log Select Advanced Administration LogsManage the Activity Log and Syslog View the Logs Manage the Modem Router and Monitor the Traffic 166  To manage which activities are logged Specify Which Activities Are LoggedSpecify a Syslog Server Select Attached Devices  To display the wired and WiFi devicesView Devices Currently on the Network Monitor and Meter Internet Traffic Start the Traffic Meter Without Traffic Volume RestrictionsSelect Advanced Advanced Setup Traffic Meter View the Traffic Statistics and Traffic Status  To record and restrict the Internet traffic by volume Restrict Internet Traffic by Volume Select the Traffic volume control by radio button  To record and restrict the Internet traffic by time Restrict Internet Traffic by Connection Time  To unblock the traffic meter Unblock the Traffic Meter After the Traffic Limit Is Reached Manage the Modem Router Remotely  To set up remote managementSelect Advanced Advanced Setup Remote Management Select the Turn Remote Management On check box From the Device Mode menu, select Modem Modem Only Configure the Modem Router as a DSL Modem Only To use remote access  To configure the modem router as a DSL modem only Manage Firewall Rules, Port Forwarding, and Port Triggering Select Advanced Security Firewall Rules Add an Outbound Firewall Rule To add an outbound firewall rule Allow by schedule, otherwise block Block alwaysBlock by schedule, otherwise allow Allow always  To change an outbound firewall rule Change an Outbound Firewall Rule  To change the priority of an outbound firewall rule Change the Priority of an Outbound Firewall Rule  To enable or disable an outbound firewall rule Disable or Enable an Outbound Firewall Rule  To remove an outbound firewall rule Remove an Outbound Firewall Rule Select Advanced Security Firewall Rules Starting Port field  To change a custom service or application Following figure shows two entries in the Service Table  To remove a custom service or application AC1200 WiFi DSL Modem Router-Essentials Edition Model D6100 AC1200 WiFi DSL Modem Router-Essentials Edition Model D6100 Click the Add Custom Service button  To change a port forwarding rule Change a Port Forwarding Rule  To remove a port forwarding rule Remove a Port Forwarding Rule  To make a local web server public Application Example Make a Local Web Server Public How the Modem Router Implements the Port Forwarding Rule Manage Port Triggering for Services and Applications  To add a port triggering rule Add a Port Triggering Rule Inbound Connection Change a Port Triggering Rule To change a port triggering rule AC1200 WiFi DSL Modem Router-Essentials Edition Model D6100  To remove a port triggering rule Remove a Port Triggering Rule  To specify the time-out for port triggering Disable Port Triggering To disable port triggering Specify the Time-Out Period for Port Triggering Application Example Port Triggering for Internet Relay Chat Clear the Disable Port Triggering check box AC1200 WiFi DSL Modem Router-Essentials Edition Model D6100 Diagnostics and Troubleshooting  To ping an IP address Perform DiagnosticsPing an IP Address Perform a DNS Lookup  To display the routing table Display the Routing Table Problem Possible Solution Quick Tips for TroubleshootingReboot the Modem Router from the Web Management Interface Bottom Panel Product Label on Troubleshoot with the LEDs WiFi LED Is Off Power LED Remains Solid AmberPower LED Is Off You Cannot Log In to the Modem Router Troubleshoot the DSL Link Troubleshoot the Internet Connection  To check the Internet IP address Internet LED Is OffObtain an Internet IP Address  To verify that your PPPoE or PPPoA connection is working Troubleshoot PPPoE or PPPoA Troubleshoot Internet Browsing Changes Are Not Saved Troubleshoot the WiFi Connectivity  To ping the modem router from a Windows computer Troubleshoot Your Network Using the Ping UtilityTest the LAN Path to Your Modem Router Test the Path from Your Computer to a Remote Device Supplemental Information Internet connection Factory SettingsFeature Default Behavior Router login Main WiFi network General WiFi settings Feature Default BehaviorGuest WiFi network Feature Description Technical Specifications Supplemental Information 221