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Knowledge Base document #318

LAN connection to FRITZ!Powerline cannot be established

One or both of the LAN ports cannot be used to connect to the FRITZ!Powerline device. FRITZ!Powerline does not detect computers, NAS systems, or other network devices connected to it and they cannot access the FRITZ!Powerline device or the internet. One of the following error messages may be displayed by the device:

  • 'A network cable is unplugged.'
  • 'Network cable unplugged.'
  • 'You are currently not connected to any networks.'

Simply proceed as described below. After each measure, check whether the problem is solved.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Powerline device.

1 Restarting the FRITZ!Powerline device

  1. Unplug the FRITZ!Powerline device.
  2. Plug the FRITZ!Powerline device back in after about 1 minute.

    Note:Restarting the FRITZ!Powerline device will not delete any of the settings.

2 Installing the latest FRITZ!OS

Perform the following steps on a different device connected to the FRITZ!Powerline:

Important:If you cannot access the FRITZ!Powerline with any device, proceed as described in the guide FRITZ!Powerline user interface cannot be opened.

  1. Install the latest FRITZ!OS on the FRITZ!Powerline device.

3 Installing the latest software for the device

  1. Install the latest software version for the device or the latest driver for the computer's LAN network adapter.

    Note:Since Windows Update often does not offer the latest drivers, install the drivers from the manufacturer's website, for example from the Intel Download Center.

4 Connecting a device directly with FRITZ!Powerline

This step is only necessary if the device is connected with the FRITZ!Powerline by means of a hub/switch, another powerline device, a LAN/Wi-Fi converter, or other device instead of being connected directly to the FRITZ!Repeater:

  1. Connect the device directly to a LAN port on the FRITZ!Powerline device. If possible, use the network cable included with the FRITZ!Powerline.
  2. If you can establish a LAN connection to FRITZ!Powerline now, then there is a problem with the intermediary device or its cabling:
      1. Make sure that the intermediary devices function properly.
      2. Update the software / firmware of the intermediary devices.
      3. If the intermediary devices offer different network or routing settings, test them. For example, disable advanced options like STP / MSTP for testing purposes.
      4. Use different network cables to connect the devices to the FRITZ!Powerline device's power adapter. Use the shortest possible high-quality network cables (CAT 5e or higher).

5 Testing a different cable

The network cable used to connect the device to the FRITZ!Powerline device may be too long, incorrectly wired, or defective:

  1. Use the shortest possible high-quality network cable to connect the device to the FRITZ!Powerline device, for example use the network cable included with the FRITZ!Powerline.

    Note:Any standard network cable CAT 5e or higher (STP, 1:1) with a maximum length of 100 m can be used to connect network devices to the FRITZ!Powerline.

6 Disabling energy-saving functions for the network adapter

  1. If any energy-saving functions are enabled for the computer's LAN network adapter or the device, disable them for testing purposes.

    Note:In Windows, different power saving functions can be set for many network adapters under 'Properties > Power Management' in the Device Manager.

7 Disabling EEE (Energy Efficient Ethernet) in the FRITZ!Powerline

With EEE, network adapters can be put into an energy-saving standby mode, thus also significantly reducing their average power consumption. Since there may be compatibility issues with individual network adapters when EEE is enabled, disable EEE for testing purposes:

Links 'Help and Info' and then 'FRITZ!Powerline Support'
  1. In the user interface of FRITZ!Powerline device click on 'Help and Info' on the bottom left of the page and then on 'FRITZ!Powerline Support' at the bottom.
  2. Enable the 'Disable EEE (Energy Efficient Ethernet)' option in the 'Ethernet Compatibility' section.
  3. Click on 'Apply setting' to save the settings.
  1. Connect a different device to the LAN port on FRITZ!Powerline.
  2. If the other device can access FRITZ!Powerline and the internet, the first device is either incorrectly configured or defective.



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