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Knowledge document #43

Determining the MAC address of the FRITZ!Repeater

A MAC address (Media Access Control address) is the hardware address of a network interface (for example Wi-Fi) and serves as a unique identifier of a device in a network. Each of the FRITZ!Repeater's network interfaces has its own MAC address.

The FRITZ!Repeater uses the MAC addresses for

  • the Wi-Fi connection to the wireless router.
  • wireless devices connected to the Wi-Fi network of the repeater.
  • devices that are connected to the LAN port on the repeater via network cable.

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

1 Determining the Wi-Fi MAC address for registering devices with the router

  1. Click "Access to Home Network" in the user interface of the FRITZ!Repeater.
  2. The MAC address is listed in the section "Local Wi-Fi Network Information".

2 Determining the Wi-Fi MAC address for registering wireless devices

The Wi-Fi MAC address of the FRITZ!Repeater is printed on the type label on the back side of the repeater and can also be determined using the user interface:

  1. Click "Wi-Fi" ("Wireless") in the user interface of the FRITZ!Repeater.
  2. Click "Wi-Fi Network" ("Radio Network") in the "Wi-Fi" ("Wireless") menu.
  3. The MAC address is listed in the section "Active Frequency Bands".

3 Determining the LAN MAC address

The LAN MAC address of the FRITZ!Repeater is either displayed in the router to which the repeater is connected as a LAN bridge or can determined on a computer connected to the LAN port on the repeater. The procedure depends on the operating system of the computer:

Windows

  1. Press the keyboard shortcut Windows key + R.
  2. Enter cmd in the "Open" field and click "OK".
  3. Enter nslookup fritz.repeater in the command prompt window and press Enter.
  4. Make note of the IP address of the FRITZ!Repeater displayed next to the entry "Address:".
  5. Enter arp -a [IP address of the FRITZ!Repeater] and press Enter.

    Example:
    arp -a 192.168.178.20

  6. The MAC address of the FRITZ!Repeater is displayed under the entry "Physical Address".

macOS

  1. Open the Finder.
  2. Click "Applications" and then "Utilities".
  3. Open Terminal.
  4. Enter nslookup fritz.repeater in the Terminal and press Enter.
  5. Make note of the IP address of the FRITZ!Repeater displayed next to the entry "Address:".
  6. Enter arp [IP address of the FRITZ!Repeater] and press Enter.

    Example:
    arp 192.168.178.20

  7. The MAC address of the FRITZ!Repeater is displayed.

Linux

  1. Open Terminal. If you are using Ubuntu, you can open Terminal by pressing the keyboard shortcut CTRL + ALT + T.
  2. Enter nslookup fritz.repeater in the Terminal and press Enter.
  3. Make note of the IP address of the FRITZ!Repeater displayed next to the entry "Address:".
  4. Enter arp [IP address of the FRITZ!Repeater] and press Enter.

    Example:
    arp 192.168.178.20

  5. The MAC address of the FRITZ!Repeater is displayed.
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