How to have Fixed IP?

[albarreto]

Hi folks,

My newest router is locked by provider and there's no option for lock ip by MAC.
I have TX3 Mini+ with my docker server and I need change IP for a fixed.
At first, I tried install Cockpit for change IP using a GUI. But when I reboot, the ip number come back to provided by DHCP

I tried to use nmcli commands:

# nmcli c mod 'eth0' ipv4.addresses 192.168.0.24/24 ipv4.method manual
# nmcli con mod 'eth0' ipv4.gateway 192.168.0.1
# nmcli con mod 'eth0' ipv4.dns "192.168.0.1"

The IP is changed, but when I reboot, the older IP backs.
After reboot, it is a "nmcli c show" command:

NAME                UUID                                  TYPE      DEVICE
eth0                6b9bd335-2505-4fcc-b85e-4b32ce1015bf  ethernet  eth0 <=== Recreated after boot
br-73de9cc8efd0     354a44d6-4f1e-4e33-8529-1c267f262c12  bridge    br-73de9cc8efd0
docker0             4a6edebd-15f0-4f7a-ba61-d90d1b9cc870  bridge    docker0
lo                  a618d8ef-3fca-4cc7-b43f-6ef16608f7b8  loopback  lo
br-3c1a15e4a19c     a9f5f40c-97ce-4e36-a6f9-37ac8bb0df7b  bridge    br-3c1a15e4a19c
br-4bf9f8a99221     6409829c-5acc-46b9-b6d2-1936e43064c6  bridge    br-4bf9f8a99221
eth0                9de642e9-a289-4974-87aa-1bd0fe9f0101  ethernet  --

Any idea?

[FotoFotoCheck]

uhm type this command and see output....

sudo nmcli connection

...name "eth0" is strange for a wired lan...in all my debian based is "Wired connection 1" like the pic...

so, basically, the command is:

sudo nmcli connection modify 'Wired connection 1' ipv4.address your-static-ip/24
sudo nmcli connection modify 'Wired connection 1' ipv4.gateway ip-of-your-gateway/router
sudo nmcli connection modify 'Wired connection 1' ipv4.method manual
sudo nmcli connection modify 'Wired connection 1' ipv4.dns '8.8.8.8'
sudo reboot

replace "your-static-ip" with your ip and "ip-of-your-gateway/router" with router/gateway ip....
(8.8.8.8 is only an example...here you need to put your primary DNS IP)

[albarreto]

Hi, thanks for your reply.

I tried your suggestion, but is didn't work.
I typed (without errors):

sudo nmcli connection modify 'Wired connection 1' ipv4.address 192.168.0.24/24
sudo nmcli connection modify 'Wired connection 1' ipv4.gateway 192.168.0.1
sudo nmcli connection modify 'Wired connection 1' ipv4.method manual
sudo nmcli connection modify 'Wired connection 1' ipv4.dns '8.8.8.8'
sudo reboot

The IP remains 192.168.0.137 when it starts.

# sudo nmcli connection
NAME                UUID                                  TYPE      DEVICE
eth0                f72c913b-b181-4ac1-bedf-1fde60a8134c  ethernet  eth0
br-73de9cc8efd0     259d9857-96e9-45fa-9c21-d5ed57840ed6  bridge    br-73de9cc8efd0
docker0             4f7c53d4-8188-4d47-b678-e9eae50fc22f  bridge    docker0
lo                  ee521d9b-3a0b-4acb-b7c3-312d114a2723  loopback  lo
br-3c1a15e4a19c     f99e8e72-4fee-44c5-8aa0-e2a4897d76fc  bridge    br-3c1a15e4a19c
br-4bf9f8a99221     1b41f819-088c-4303-989d-3ca7f5f106b5  bridge    br-4bf9f8a99221
eth0                9de642e9-a289-4974-87aa-1bd0fe9f0101  ethernet  --
eth0                6f5201da-263f-471f-a15b-35ab97a32e40  ethernet  --
Wired connection 1  5b8d34ec-4e2c-3173-8b76-b67fc398671e  ethernet  --

BTY, when I tried the original commands (using eth0), I lost ssh connection and a network scanner app shows the updated IP, but I reboot, the ip 137 returns.

NOTE: I'm using a tv box Tanix TX3 Mini+

uname -a
Linux docker-tx3miniplus 6.6.8-meson64 #16 SMP PREEMPT Fri Dec 22 10:24:05 CET 2023 aarch64 GNU/Linux

[FotoFotoCheck]

you have 4 eth port configured in your box that have only one eth LoL ...i think the more convenient way is to reinstall debian (or ubuntu) ...my knowledge stop here ;\ i'm very sorry

[albarreto]

No problem. 👍
That additionals ports were added afer each nmcli command.
OS adds and changes UUID

[gleitoncampos]

In my case, this debian 12 image uses Systemd-Networkd as network manager. Check this documentation, it worked to me: https://wiki.debian.org/SystemdNetworkd