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Knowledge document #318

LAN connection to the FRITZ!Repeater cannot be established

One or both of the LAN ports cannot be used to connect to the FRITZ!Repeater. The FRITZ!Repeater does not detect computers, NAS systems, or other network devices connected to it and they cannot access the FRITZ!Repeater 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!Repeater.

1 Restarting the repeater

  1. Unplug the repeater.
  2. Plug the repeater back in after 5 minutes.

2 Installing the latest FRITZ!OS

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

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

  1. Install the latest FRITZ!OS on the FRITZ!Repeater.

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 the repeater

This step is only necessary if the device is not directly connected to the FRITZ!Repeater, but through a hub/switch, powerline device, LAN/Wi-Fi converter, or other devices instead:

  1. Connect the device directly to a LAN port on the FRITZ!Repeater. If possible, use the network cable included with the FRITZ!Repeater.
  2. If you can establish a gigabit LAN connection to the FRITZ!Repeater now, then the intermediary device or its cabling does not support gigabit LAN:
      1. Make sure that the devices support gigabit LAN.
      2. Update the software / firmware of the devices.
      3. Use different network cables to connect the devices to the FRITZ!Repeater. Use the shortest possible high-quality network cables (CAT 5e or better).

5 Testing a different cable

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

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

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

6 Disabling EEE (Energy Efficient Ethernet) in the repeater

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!Repeater Support"
  1. In the user interface of the FRITZ!Repeater, click "Help and Info" on the bottom left of the page and then on "FRITZ!Repeater Support" at the bottom.
  2. Enable the option "Disable EEE (Energy Efficient Ethernet)" in the "Ethernet Compatibility" section.
  3. Click "Apply setting" to save the settings.

7 Adjusting the LAN settings of the repeater

Problems may occur when negotiating transmission rates. Therefore, test whether the connection can be established when you adjust the settings for the LAN port used:

  1. Open the user interface of the FRITZ!Repeater on a different device.
  2. Click "Network Settings" in the "Network" menu.
  3. If "Green Mode" is enabled in the section "LAN Settings" for the LAN port being used, enable "Power Mode".
    • If "Power Mode" is enabled for the LAN port being used, enable "Green Mode".
  4. Click "Apply" to save the settings.

8 Testing a different LAN port

The following step is only necessary if the FRITZ!Repeater is connected to the FRITZ!Box via Wi-Fi (Wireless bridge) or another repeater (cascading):

  1. For testing purposes, use a network cable that is as short as possible (for example the cable included with the FRITZ!Box) to connect the device to the other LAN port on your FRITZ!Repeater.
  2. If your device can access the FRITZ!Repeater and the internet when connected to the other LAN-port, use that LAN port instead.

9 Testing a different device

  1. Connect a different device to the LAN port on the FRITZ!Repeater.
  2. If the other device can access the FRITZ!Repeater and the internet, the first device is either incorrectly configured or defective.
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