How to configure a USB ethernet adapter as LAN?

y2kbug · 2023-06-12T03:17:11.416Z

I am using GL-AX1800 on the latest v4.2.1r4.
I have plugged-in the USB adapter, it could be recognized, and used as WAN.
I am trying to configure the router running in access point mode, while using the USB adapter as LAN port.

Groupping usb0 into br-lan like this:

Screenshot from 2023-06-12 11-08-29926×707 43.8 KB

The router won’t be able to get an IP address from DHCP (on another router).

How to configure it correctly?
Thanks.

alzhao · 2023-06-12T09:46:13.190Z

What is the settings of the WAN interface?

y2kbug · 2023-06-12T09:58:18.042Z

I have factory-reset the router.
After initialization, I have clicked “use WAN port as LAN”.
Nothing more is modified.
And then I have done the groupping of USB0 mentioned in the previos post.

Thanks.

alzhao · 2023-06-12T10:18:28.785Z

USB0 was in the WAN zone. So can you check the WAN interface configuration in luci?

y2kbug · 2023-06-12T13:18:38.741Z

I have connected LAN on GL-AX1800 to PC, and USB-LAN on GL-AX1800 to router with WAN.

Enabled network from USB:

Screenshot from 2023-06-12 21-16-211299×997 161 KB

The interface having USB0 should be TETHERING.

Screenshot from 2023-06-12 21-15-53963×979 110 KB

y2kbug · 2023-06-12T14:01:17.002Z

Removing all other ETH, just having USB0 in BR-LAN, it can get IP from DHCP from another router:

Screenshot from 2023-06-12 22-00-04968×361 32.8 KB

However, devices connecting to WIFI from GL-AX1800 cannot obtain any IP address, hence failing to connect to WIFI.

y2kbug · 2023-06-12T14:52:16.540Z

By the way, I have found 2.4Ghz WIFI is not connectable when USB adapter is connected.
I have tried reset the router and played around with WIFI settings.
Simply unplugging the USB adapter 2.4Ghz WIFI works again.
Strange.

groentjuh · 2023-06-12T15:02:05.568Z

y2kbug:

Simply unplugging the USB adapter 2.4Ghz WIFI works again.

USB 3.0 can create interference on 2.4 GHz according to this whitepaper.

.

y2kbug · 2023-06-12T15:13:41.224Z

Oh yes, I have heard of this before. Totally forgot.

Actually what I am trying to do is, using the USB as 2.5gbps ethernet adapter. Maybe I should wait GL publishing a new model…

alzhao · 2023-06-14T06:38:18.821Z

You should remove usb0 from tethering in order to let it work as LAN.
tethering interface is part of wan.

image1141×1166 246 KB

y2kbug · 2023-06-14T06:47:36.151Z

I did removed THTHERING, and grouped USB0 into BR-LAN.
Anyway the USB adapter interferes 2.4Ghz WIFI so it is meaningless to fix the setup.

I have bought another GL-MT3000 (CN version).
May I know the difference between the CN version and the international version?

Thanks.

groentjuh · 2023-06-14T07:12:09.792Z

y2kbug:

May I know the difference between the CN version and the international version?

Statement on the purchase of products in mainland China Announcement

Dear all, We regret to make the following annoucement. Due to current legal and policy restrictions in mainland China, we are unable to provide VPN and AdGuard Home features in our CN version products sold in mainland China. We understand that this may cause inconvenience, but we have to comply with local regulations. If you purchase GL.iNet devices from tmall.com or taobao.com, your devices will be CN version. We have added this information to our product pages on TMall, our official store in…

y2kbug · 2023-06-14T07:16:44.244Z

I see. It is acceptable to me. The CN version is cheaper.

y2kbug · 2023-06-28T15:24:17.848Z

Since my last reply I decided to use GL-MT3000 instead of AX1800 for my 2.5gbps network.
However, WIFI speed with VLAN configured on MT3000 is horribly slow (around 1mbps).
So I am now trying to configure the USB adapter on AX1800 again.
My plan is to use the USB adapter as LAN interface and provide access to 5ghz WIFI.
I will use AXT1800 for 2.4ghz WIFI.

I have done a factory reset on AX1800.
Afterwards, I have deleted all interfaces and firewall zones.

Interfaces (on AX1800) are then recreated as follow:

image966×991 105 KB

LAN, IOT and GUEST are from BR-USB, with USB0.
ETH0LAN, ETH0IOT and ETH0GUEST are from BR-LAN, with ETH0 (WAN port on router).

BR-USB (on AX1800):

BR-LAN (on AX1800):

Wireless configuration (on AX1800):

image966×991 79.2 KB

image966×991 80.1 KB

“5Ghz” WIFI is on USB0, and “5Ghz-Guest” is on ETH0.

Other configuration (on AX1800):

Basically BR-USB and BR-LAN are same in configurations.
Trying to connect to “5Ghz” WIFI from my phone, it won’t be connected.
Even tried to manually assigned an IP, subnet mask, default gateway, it failed.
But connecting to “5Ghz-Guest” just worked well.
There was an IP assigned, and there was Internet access.

I highly suspect there is something hardcoded behind the scene.
So BR-USB does not work like BR-LAN.
“bond0” and “bonding_masters” are suspective.

How should I configure the USB adapter working as a LAN port as if it is a eth*?
i.e. I want usb0 to be eth5

Thanks.

y2kbug · 2023-07-01T01:03:26.855Z

Excuse me @alzhao
Do you think it is due to my configuration, or limitation to AX1800?
Thanks.

y2kbug · 2023-07-01T03:19:40.634Z

I have just found after reboot with USB adapter plugged-in, two interfaces will be created automatically.

image964×732 71 KB

alzhao · 2023-07-01T05:25:32.997Z

It should work. But have to try and find out the reason. Maybe some script is reversing the config.

Maybe Check out mwan3 config. Or disable it completely.

y2kbug · 2023-07-01T06:04:37.617Z

I have tried to empty /etc/config/mwan3 and rebooted the router, but does not work.
It is the same case on both GL-AX1800 and GL-AXT1800.