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Deutsche Telekom FTTH Access with OpenWRT

Configuring Deutsche Telekom FTTH Access with OpenWRT

After looking for alternatves to the suggested Router from Telekom (AVM FritzBox and HUawei Speedport), I've discovered the possibility of configuring my existing OpenWRT Router to act as gateway to the Telekom FTTH (Fiber To The Home) Magenta Zuhause package.

TL;DR

The WAN interface must be configured as follows (see your Telekom letter):

Requirements

Access Data

It's important to know the following information, before attempting any connection:

  • Anschlusskennung
  • Zugangsnummer
  • Mitbenutzernummer
  • Zugangskenntwort

All the above information are typically sent by Telekom at home, when activating the Internet Access.

Hardware

You need a OpenWRT-capable router (e.g. TP-Link Archer C7 works really well), see here for an exhaustive list of supported devices.

Make sure your Telekom Fiber Modem is working properly.

Configuration

Enable VLAN

The Telekom PPPoE access requires the VLAN-ID to be set to 7. In order to do so, you have to configure the Router Ethernet interface that refers to WAN. The configuration panel can be found under the Menu entry Network->Switch

In this panel, you can see a table showing the VLAN(s) configured for your Router (typically 2) and they have some comboboxes with status tagged/untagged/off. One of the VLANs configured should be configured with the following information:

Port Status CPU (eth0) LAN1 LAN2 LAN3 LAN4 WAN
1 tagged untagged untagged untagged untagged off
7 tagged off off off off tagged

In case of Routers with multiple Ethernet interfaces (e.g. TP-Link Archer C7), the panel should look like this:

Port Status CPU (eth0) CPU (eth0) LAN1 LAN2 LAN3 LAN4 WAN
1 tagged tagged untagged untagged untagged untagged off
7 tagged tagged off off off off tagged

Setup WAN Interface

In the Menu entry Network->Interfaces, select the WAN interface and set the following information in the General Setup tab:

In the tab Physical Settings, select the interface Switch VLAN eth0.7 (the one corresponding to the VLAN-ID 7).

Beware: in case your "Zugangsnummer" has less than 12 digits, the PAP/CHAP username is in the form AnschlusskennungZugangsnummer#Mitbenutzernummer@t-online.de (see https://telekomhilft.telekom.de/t5/Telefonie-Internet/PPPOE-Einwahl-ueber-einen-Router-herstellen/ta-p/3654990 for further details)

Happy surfing!

@karlsebal
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karlsebal commented Sep 18, 2021

Thank you for sharing this. I would like to mention that for Zugangsnummern with less than 12 digits you have to insert # between Zugangsnummer and Mitbenutzernummer. See here

@madduci
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madduci commented Sep 18, 2021

@karlsebal
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karlsebal commented Sep 18, 2021

@madduci
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madduci commented Sep 18, 2021

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