Setting a Fritz!Box 7412 as VDSL2 Modem

Hi all,
I need some help or just a hint on setting up a Fritz!Box 7412 as a VDSL modem, please.
Setup looks like this:
1&1 DSL -- FB7412 -- OPNsense -- LAN

I successfully flashed my Fritz!Box 7412 with OpenWrt 19.07.3 and VDSL modem firmware vr9-B-dsl.bin out of the latest FB7490 for full VDSL2 support.
Configuring my 1&1 credentials for connecting to the line works direct from the FB7412.
This was just a test to see if the box in general is working with new modem firmware.
Being on a VDSL50 the connection speed is awesome with the new firmware.
Data Rate: Down: 109.983 Mb/s / Up: 26.997 Mb/s

My problem now, I have no clue how to set the FB7412 to act just as a modem in bridge/transparent mode.
Setting WAN interface as bridge doesn't work either.
1&1 provider credentials are set in the OPNsense behind the FB7412.

I appreciate any kind of help, maybe someone is using the same setup as well.

Thanks
Stefan

Hi,
hey, one year later... but I just did few days ago what you are asking for in this topic. I have a FB7412 as modem-bridge using openwrt 19.07 (with VLANs and so), and then a Linksys wrt1900acs as router, doing all PPPoE and routing stuff.

Did you manage to do it? maybe you still need some help or hints?

To anyone visiting this post with the same issue:

NOTE: This router, the Fritzbox 7412, has no "reset" button. This means, if something happens, you have no way to reset it, other than failsafe mode or something like that.

The main thing in to set up two soft-VLANs in the eth port. This is, we make a bridge between wan and eth0.10 (in my case VLAN ID 10). In order to keep access to the modem through the LAN (for admin purposes), it is needed a second VLAN, for instance eth0.20 (in my case, VLAN ID 20).

This way you can use the device as a transparent modem-bridge, while keeping access to it through the LAN.

2 Likes

Hey Felipe, I have a ZyXEL VMG3006-D70A VDSL2 SuperVectoring Bridge Modem now, works out of the box. If I find some time I'll Look into this again. Thx Stefan

Additional vlan id is not needed if only 7412 interface is required.

Please take a look my OpenWrt Master config with baby jumbo frames patch . On Router side I've added WAN connection with 10.10.0.2 and that allow me access to 7412 interface . Wifi is my backup access if anything fails :slight_smile:

root@7412:~# uci show network
network.loopback=interface
network.loopback.device='lo'
network.loopback.proto='static'
network.loopback.ipaddr='127.0.0.1'
network.loopback.netmask='255.0.0.0'
network.globals=globals
network.globals.ula_prefix='fd8b:9a6d:ec44::/48'
network.globals.packet_steering='1'
network.dsl=dsl
network.dsl.annex='b'
network.dsl.tone='av'
network.dsl.firmware='/lib/firmware/vdsl.bin'
network.dsl.xfer_mode='ptm'
network.dsl.line_mode='vdsl'
network.@device[0]=device
network.@device[0].name='br-lan'
network.@device[0].type='bridge'
network.@device[0].mtu='1508'
network.@device[0].ipv6='0'
network.@device[0].ports='dsl0.35' 'lan'
network.@device[0].multicast='0'
network.@device[1]=device
network.@device[1].name='lan'
network.@device[1].macaddr='5C:xx:xx:xx:xx:xx'
network.@device[1].mtu='1508'
network.lan=interface
network.lan.device='br-lan'
network.lan.proto='static'
network.lan.ipaddr='10.10.0.1'
network.lan.netmask='255.255.0.0'
network.lan.ip6assign='60'
network.lan.mtu='1508'
network.@device[2]=device
network.@device[2].name='dsl0'
network.@device[2].macaddr='5C:xx:xx:xx:xx:xx'
network.@device[2].mtu='1508'
network.@device[2].mtu6='1508'
network.@device[3]=device
network.@device[3].name='dsl0.35'
network.@device[3].type='8021q'
network.@device[3].ifname='dsl0'
network.@device[3].vid='35'
network.wlan=interface
network.wlan.proto='static'
network.wlan.device='radio0.network1'
network.wlan.ipaddr='192.168.1.2'
network.wlan.netmask='255.255.255.0'