Common MTU sizes | NETGEAR C6300 instruction

AC1750 WiFi Cable Modem Router

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

The BASIC Home screen displays.

4.Select ADVANCED > Setup > WAN Setup.

5.In the MTU Size field, enter a value from 64 to 1500.

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

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 1. Common MTU sizes

MTU	Application

1500	The largest Ethernet packet size. This setting is typical for connections that do not use
	PPPoE or VPN, and is the default value for NETGEAR modem 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 use 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.

Specify Network Settings

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NETGEAR C6300 user manual Common MTU sizes

Contents

AC1750 WiFi Cable Modem Router Compliance SupportTrademarks Contents Specify Network Settings Appendix a Supplemental Information Hardware Setup Unpack Your Modem Router Front Panel LED Rear Panel Position Your Modem Router Retrieve and Display the Product Label  To retrieve the product label from the modem router Cable Your Modem Router Cable the Modem Router in a Simple Network  To cable your modem router Cable Your Modem Router to a Router or Gateway To cable your modem router to a gateway or router Select Advanced Administration Router Mode Connect to the Network Access the Modem Router  To use WPS to connect to the WiFi network Wired ConnectionWiFi Connection  To find and select the WiFi network Log In to the Modem Router Types of Logins To log in to the modem router Specify Initial Settings  To set up your Internet connection Notify Your Internet Provider  To change the starting frequency Specify the Cable Connection Starting FrequencySelect Cable Connection View Modem Router Initialization  To view the status of the modem router initialization  To specify the Internet connection settings Specify the Internet Connection SettingsSelect Advanced Setup Internet Setup Specify Initial Settings Control Access to the Internet  To set up Live Parental Controls Set Up Parental ControlsSelect Parental Controls Control Access to the Internet Click the Take me to the status screen button Use Keywords to Block Internet Sites To block Internet sites Click the Add Keyword button Select Advanced Security Block Sites To delete keywords from the list  To block services Block Services from the InternetSelect Advanced Security Block Services Schedule When to Block Internet Sites and Services Select Advanced Security Schedule Avoid Blocking on a Trusted Computer To schedule blocking  To specify a trusted computer Set Up Security Event Email Notifications  To set up email notifications Control Access to the Internet Modem Router USB Drive Requirements Access a USB Drive on the Network To connect a USB drive  To specify the USB access settings Control Access to the USB Drive To map the USB device to a Windows network drive Select Advanced USB Storage Advanced Settings Network Neighborhood/MacShare. Enabled by default  To set up FTP access Use FTP Within the Network View or Change Network Folders on a USB Drive  To view or change network folders Select Advanced ReadySHARE Add a Network Folder on a USB Drive To add a network folder Click the Create Network Folder button  To edit a network folder Edit a Network Folder on a USB DriveApprove USB Devices  To approve USB devices Click the Approved Devices button Select Advanced Advanced Setup USB SettingsSelect the Allow only approved devices check box Safely Remove a USB Drive Select USB Storage Basic Settings To remove a USB disk drive safely Specify Network Settings  To view or change the WAN settings View or Change the WAN SettingsSelect Advanced Setup WAN Setup Change the MTU Size  To change the MTU size Common MTU sizes Set Up a Default DMZ Server  To set up a default DMZ server Change the Modem Router’s Device Name Change the LAN TCP/IP SettingsSelect Advanced Setup LAN Setup  To change the modem router’s device name  To change the LAN TCP/IP settings Specify the IP Addresses That the Modem Router Assigns Reserve LAN IP Addresses  To reserve an IP address  To edit a reserved address entry  To delete a reserved address entry  To use the WPS Wizard Use the WPS Wizard for WiFi ConnectionsSpecify Basic WiFi Settings Select Advanced WPS Wizard  To specify basic wireless settings Change the WiFi Security Option  To change the WPA settings Set Up a WiFi Guest Network  To set up a guest network Select Guest Network Enable or Disable the Wireless Radios Control the Wireless RadiosUse the WiFi On/Off Button  To enable or disable the wireless radios Select Advanced Advanced Setup Wireless Settings Specify WPS Settings To specify WPS settings Set Up a Wireless Card Access List  To set up wireless card access Click the Set Up Access List button Select the Use a Dynamic DNS Service check box  To set up Dynamic DNSSelect Advanced Advanced Setup Dynamic DNS Dynamic DNS Select Advanced Advanced Setup UPnP  To enable Universal Plug and PlayImprove Network Connections with Universal Plug and Play  To refresh the information in the UPnP Portmap Table Manage Your Network  To view modem router status and usage information View Modem Router StatusView Cable Information  To view modem router cable information View Internet Port Information  To view modem router Internet port information  To view wireless settings Reboot the Modem RouterWireless Settings  To reboot the modem router Change the Router Mode  To change the router mode View Logs of Modem Router Activity  To view and customize logs View a Network Map Select Advanced Administration Logs To view the network map Select Advanced Administration Network Map Manage the Modem Router Configuration FileBack Up Settings  To back up the modem router’s configuration settings Select Advanced Administration Backup Settings Restore Configuration SettingsErase the Current Configuration Settings  To restore configuration settings that you backed up  To set the password for the user name admin Change the admin Password To erase the configuration settings Select Advanced Administration Set Password Run the Ping Utility Select Advanced Administration Event LogView Event Logs  To view the event logs  To run a ping test Run the Traceroute Utility Select Advanced Administration Diagnostics To run a traceroute test  To manage your wireless access point AP View Wireless Access Points in Your AreaView or Change the Modem Router Wireless Channel Select Advanced Administration Wireless AP Select Advanced Administration Wireless Channel  To view or change your wireless channelRemote Management  To set up remote management  To use remote access Specify Internet Port Settings Set Up Port Forwarding to a Local Server  To forward specific incoming protocols  To add a custom service Add a Custom Port Forwarding ServiceClick the Add Custom Service button  To edit a port forwarding entry Edit a Port Forwarding ServiceDelete a Port Forwarding Entry  To delete a port forwarding entry Application Example Make a Local Web Server Public How the Modem Router Implements the Port Forwarding Rule To make a local web server public Add a Port Triggering Service Set Up Port Triggering To add a port triggering service Specify Internet Port Settings  To specify when to use port triggering Specify When to Use Port TriggeringClick the Apply button Application Example Port Triggering for Internet Relay Chat Troubleshooting Use LEDs to Troubleshoot Cannot Log In to the Modem Router Troubleshoot a TCP/IP Network Using a Ping Utility Troubleshoot the Cable Internet Connection Use Ping to Test the LAN Path to Your Modem Router Ping Reply from IP address bytes=32 time=NN ms TTL=xxx Supplemental Information Factory Default Settings Factory default settings Technical Specifications AC1750 WiFi Cable Modem Router Factory default settings