FRITZ!Box 3272 Serwis - Baza wiedzy

FRITZ!Box 3272 Serwis
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Slow Internet access when using FRITZ!Box with a different modem or router (e.g. cable modem)

The Internet connection of a network device (for example a computer, smartphone) connected to the FRITZ!Box is very slow. As a result, web pages load slowly, it takes a long time to download files, and video streams are either not displayed correctly or are interrupted.

In this case, the FRITZ!Box connects to the Internet over an additional DSL or cable modem, or it uses an existing Internet connection in the network.

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS

Simply proceed as described below. After each measure, check whether the issue persists.

1 Restarting the modem or router

The modem or upstream router may be malfunctioning, for example due to an error that occurs occasionally:

  • Restart the modem or router by unplugging the device briefly.

    Note:It may take several minutes for the modem or router to restart. While it is restarting you will not be able to access the Internet.

2 Setting the speed of your Internet connection in the FRITZ!Box

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "Account Information" in the "Internet" menu.
  3. Check whether fields for entering "Downstream" and "Upstream" are displayed in the "Connection Settings" section:
    • If there are no fields for entering "Downstream" and "Upstream":
      • Proceed with the following section.
    • If fields for entering "Downstream" and "Upstream" are present:
      1. In the "Downstream" field, enter the speed for receiving files (download) supported by your Internet connection in kbit/s (for example 25000 for 25 Mbit/s).
      2. In the "Upstream" field, enter the speed for sending data (upload) supported by your Internet connection in kbit/s (for example 5000 for 5 Mbit/s).
      3. Click "Apply" to save your settings.
      4. Test whether the speed of your Internet connection is now sufficient.
        • If Internet access is now significantly faster:
          • Proceed with the following section.
        • If Internet access is still much too slow:
          • Reduce the upstream value by 100 kbit/s and then test whether the speed of your Internet connection is now sufficient. Repeat this procedure several times and use the setting that gives you the best speed.

3 Changing the FRITZ!Box's power settings

The following step is only necessary if your Internet service provider guaranteed you a throughput of over 100 Mbit/s:

  1. Click "Home Network" in the FRITZ!Box user interface.
  2. Click "Home Network Overview" in the "Home Network" menu.
  3. Click on the "Network Settings" tab.
  4. Enable the option "Power Mode" for the "LAN 1" port and all other LAN ports being used.
  5. Click "Apply" to save your settings.

4 Checking the throughput between the computer and the FRITZ!Box

The following step is only necessary if the computer is connected to the FRITZ!Box over wireless LAN:

  1. Clear the wireless connection between the computer and the FRITZ!Box.
  2. Use a network cable (for example the yellow cable included with delivery) to connect the computer to the FRITZ!Box.
  3. Check whether Internet access over LAN is exactly as slow as when the computer was connected over wireless LAN.

5 Correcting the Windows network settings

In order for a network device to access the Internet, all Internet requests from the network device must be forwarded to the FRITZ!Box. If the network device is configured to automatically obtain an IP address, it automatically obtains a default gateway (IP address of the FRITZ!Box) from the FRITZ!Box's DHCP server for this purpose.

The configuration of multiple default gateways on a network device is not allowed and causes errors. Therefore, check whether more than one default gateway has been configured and remove any default gateways that are not connected to the FRITZ!Box:

Note:Note for network experts: Default gateways required for routing to another known IP network can be replaced with a static route. The Windows help contains information on configuring static routes.

  1. Press the keyboard shortcut "Windows key" + "R".
  2. Enter cmd in the "Open" field and click "OK".
  3. Enter route print in the command prompt window and press Enter.
  4. Check how many entries in the table start with 0.0.0.0.
  5. If there is more than one standard gateway (several entries begin with 0.0.0.0):

    Windows 10 / 8:

    1. Press the keyboard shortcut "Windows key" + "X" and select "Control Panel" from the context menu.
    2. Click "Network and Internet" in the "Control Panel" menu.
    3. Click "Network and Sharing Center" and then "Change adapter settings".
    4. Click on the arrow next to the "Change view" icon in the menu bar and select "Details".
    5. Right-click the LAN connection for a network adapter that is not connected to the FRITZ!Box. The name of the network adapters is listed under "Device Name".
    6. Click "Properties".
    7. Select "Internet Protocol Version 4 (TCP/IPv4)".
    8. Click "Properties".
    9. If there is a default gateway entry, remove it.
    10. Click "OK" to save the settings.

    Windows 7:

    1. In Windows, click "Start" and then "Control Panel".
    2. Select "Category" from the drop-down list "View by:" (top right) in the "Control Panel" menu.
    3. Click "Network and Internet" and then "Network and Sharing Center".
    4. Click "Change adapter settings".
    5. Click on the arrow next to the "Change view" icon in the menu bar and select "Details".
    6. Right-click the LAN connection for a network adapter that is not connected to the FRITZ!Box. The name of the network adapters is listed under "Device Name".
    7. Click "Properties".
    8. Select "Internet Protocol Version 4 (TCP/IPv4)".
    9. Click "Properties".
    10. If there is a default gateway entry, remove it.
    11. Click "OK" to save the settings.
  6. Repeat these steps for all LAN connections of network adapters that are not connected to the FRITZ!Box.

6 Configuring security software

The use of security software (such as a firewall, antivirus software, web filter) to monitor Internet access can reduce the Internet speed on your computer:

  • Configure any security software installed so that it does not limit the speed of your Internet connection.

    Note:You can find information on configuring the security software in its manual, or consult its manufacturer directly.

Now the FRITZ!Box and network device establish the fastest Internet connection possible.

Note:If Internet access continues to be slow, your Internet service provider may be experiencing technical difficulties, or there may be an issue with the modem or upstream router.