Modem + Router config problem

[Bruno79]

Hey there, new user here. I bought the Flint 2 (GL-MT6000) router and flashed 24.10.4.

As a modem I use a Speedport Smart 3 in bridge/modem mode.

I have read the OpenWrt quick guide and also browsed the user guide. Following the "Accessing the modem through the router" documentation I was not able to access the internet. I am not sure what I am doing wrong. If I understood correctly the modem IP is 169.254.2.1. It is possible to reach the modem WebUI via that IP (only when connected via ethernet directly to the Speedport Smart 3).

I have used the forum search and think this is might be the solution. Is it?

@slh

• configure the modem to pure modem mode (PPPoE pass-through/ bridging), no PPPoE configuration on the modem.
• connect your router's WAN port with the LAN port of your modem.
• configure VLAN tagging and your PPPoE credentials on the router as needed.

1. modem is in bridge mode - done
2. modem LAN port connected to router WAN port - done
3. this step I am not sure how to do

I would appreciate some help with step 3

Thanks!

[brada4]

What are ppp parameters originally on speed port? You will need to replicate those.

[tsakalof]

you have to be more specific of what you are trying to achieve.

the bridge mode, does not necessarily mean that your ISP_ROUTER will only act as modem without log into your ISP_account:
Bridge mode is a special mode of operation where the current gateway/modem acts as a network bridge, forwarding all traffic to a downstream device.

If you will be using your ISP_Router as a modem only, and you want to add your ISP credentials in your OPENWRT_router, the best guide you will find in the following article:
ISP Configurations
hint: try to find the guidance about Greece, our providers use almost 90% Speedports for equipment.

In other scenario, if your ISP_Router will do the handshake and also log into your ISP_account, but the rest will be done from OPENWRT_router, read the following topic:
How to redirect wifi traffic from ISP router through my own router

[_bernd]

@Bruno79

Speedport Smart 3

Deutsche Telekom?

https://openwrt.org/docs/guide-user/network/wan/isp-configurations#deutsche_telekom

[OpenWrt Wiki] ISP Configurations

I can also show you mine...

Edit
I should show you mine.
These examples cover old swconfig.
Imported part is vlan 7 tagged on wan. Pppoe with credentials. Nothing more. And for wan6 set dhcpv6, reg address and req prefix size 56.

[Bruno79]

Hi Bernd,

yes, Deutsche Telekom. Thanks for the link, I have seen it already. I thought the speedport will connect automatically with my ISP credentials since it does so in "normal" mode. When I connect to it via Ethernet, I can see that "something" is happening.

The GL.iNet router's WAN port is connected to the speed port's LAN port 4.

I am very new to networks so I am not sure what to do next.

In OpenWrt I navigate to Network -> Interfaces. There I can see lan , wan , wan6.

What do I have to do next?

If I follow https://openwrt.org/docs/guide-user/network/wan/access.modem.through.nat and create an interface "modem" I receive "Error: Network device is not present"

If I try to edit the interface "wan" to PPPoE and insert my ISP credentials I receive "Error: Unknown error (USER_REQUEST)"

How and where can I "do" this? ->

Old platform:

config interface 'wan'
        option proto 'pppoe'
        option username '...@t-online.de'
        option password '...'
        option ipv6 'auto'
        option ifname 'eth0.2'

config switch_vlan             
        option device 'switch0'
        option vlan '2'        
        option ports '1 6t'

BNG platform:

config interface 'wan'
        option proto 'pppoe'
        option username '...@t-online.de'
        option password '...'
        option ipv6 'auto'
        option ifname 'eth0.7'

config switch_vlan
        option device 'switch0'
        option vlan '7'
        option ports '1t 6t'

config interface 'wan' means I click on edit on interface wan, correct? What is ifname? And where can I configure switch_vlan?

Sorry for the very basic questions.

Thanks.

[janh]

According to the GL-MT6000 wiki page, the WAN port is eth1. So the "ifname" needs to be "eth1.7".

From a default OpenWrt config, only the following changes to the WAN interface should be needed:

• Change device ("ifname") to include the VLAN
• Switch protocol to PPPoE
• Enter PPPoE credentials (for Deutsche Telekom, usually any values work, as "Easy Login" is enabled by default and thus the values are not checked)

The switch_vlan section is only needed for devices which still use the older swconfig architecture for the switch, and where the WAN port is part of the switch. Your device uses DSA (and the WAN port is even on a actual separate interface).

[Bruno79]

Wow, it did work with device eth1.7 and random credentials. Thank you so much. I have been struggling since Sunday.

I didn't realize I can enter a "custom" device in the bottom of the dropdown. May I ask why there must be a 7 in the name?

                        +----------------+
                        |  MT7986AV CPU  |
                        | eth0      eth1 |
                        +----------------+
                          |          |
                          6          |
+----------------------------+     +--------+
|          MT7531AE          |     |RTL8221B|
|    switch & 5x GBit PHY    |     +--------+
+----------------------------+       |
  0     1     2     3     5          |
  |     |     |     |     |          |
  |     |     |     |   +--------+   |
  |     |     |     |   |RTL8221B|   |
  |     |     |     |   +--------+   |
  |     |     |     |     |          |
 lan2   lan3  lan4  lan5  lan1       eth1

[_bernd]

@Bruno79

May I ask why there must be a 7 in the name?

It's a sub interface with vlan id 7.