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.
The WAN interface must be configured as follows (see your Telekom letter):
- Protocol: PPPoE
- PAP/CHAP username:
- Zugangsnummern with 12+ Digits/Chars: AnschlusskennungZugangsnummerMitbenutzernummer@t-online.de
- Zugangsnummern with less than 12 Digits/Chars: AnschlusskennungZugangsnummer#Mitbenutzernummer@t-online.de
- PAP/CHAP password: Zugangskenntwort
- VLAN: 7
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.
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.
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 (on OpenWRT 22.03 is Network -> Devices -> Add Device Config)
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 |
In the Menu entry Network->Interfaces, select the WAN interface and set the following information in the General Setup tab:
- Protocol: PPPoE
- PAP/CHAP username: AnschlusskennungZugangsnummerMitbenutzernummer@t-online.de
- PAP/CHAP password: Zugangskenntwort
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!
Had problems with MS Teams, Speedtests and many other services.
MTU should not be set to an MTU of 1500 in any WAN, PPPOE-WAN or VLAN 7 interface - it automatically negotiates an MTU of 1492 when dialing in.
It is confusing, because by default, grayed out, 1500 is in it, make sure that in none of the above mentioned interfaces in the field MTU is a real value in it.
check the
/etc/config/networkoruci show networkover ssh for any configured mtu:...
config interface 'wan'
option proto 'pppoe'
option device 'eth0.7'
option username 'xxx@t-online.de'
option password 'xxx'
option ipv6 'auto'
...