Unable to set static eth0 ip address via connman

General Discussion
1

Hi, I’m using BealgeBone Black. I would like to use Ethernet port (eth0) with static IP address.

I can use this command to change ip address manually. But every time when I reboot, the ip address will be changed to default again.

sudo ifconfig eth0 192.168.7.51 netmask 255.255.255.0

So I tried other 2 methods. But none of them works. Every time when I reboot the BBB, the ip address will be changed to default again.

Method 1:
Open the file

sudo nano /etc/network/interfaces

Then add the following codes

iface eth0 inet static
    address 192.168.7.51
    netmask 255.255.255.0
    network 192.168.7.0
    gateway 192.168.7.151

Then restart the network and reboot

sudo systemctl restart networking
sudo reboot

Method 2:
Use connman commands, the restart network and reboot

sudo connmanctl config ethernet_f4b898874f31_cable --ipv4 manual 192.168.7.51 255.255.255.0 192.168.7.151 --nameservers 8.8.8.8

Any other suggestions? Thanks

2

Post:

$pstree
3

Hi @foxsquirrel Thanks for support.
I used pstree command in BeagleBone. Here is the output.

debian@BeagleBone:~$ pstree
systemd-+-3*[agetty]
        |-avahi-daemon---avahi-daemon
        |-cron
        |-dbus-daemon
        |-nginx---nginx
        |-rsyslogd---3*[{rsyslogd}]
        |-sshd-+-sshd---sshd---bash-+-pstree
        |      |                    `-sudo---apt
        |      `-sshd---sshd---sftp-server
        |-systemd---(sd-pam)
        |-systemd-journal
        |-systemd-logind
        |-systemd-network
        |-systemd-resolve
        |-systemd-timesyn---{systemd-timesyn}
        |-systemd-udevd
        `-wpa_supplicant
4

To setup a static ip with systemd-network use this for example:

https://wiki.archlinux.org/title/systemd-networkd#Wired_adapter_using_a_static_IP

You’ll find a pre setup /etc/systemd/network/eth0.network

[Match]
Name=eth0
Type=ether

[Link]
RequiredForOnline=yes

[Network]
DHCP=ipv4

So you’d just change this section:

[Network]
DHCP=ipv4

to:

[Network]
Address=10.1.10.9/24
Gateway=10.1.10.1
DNS=10.1.10.1

etc…

Regards,

1 Like
5

Thanks @RobertCNelson
I solved the static IP problem. I would like to add a little bit more info for ohter beginners. In my case, I would like to set:
static ip address = 192.168.7.51
gateway=192.168.7.151
netmask=255.255.255.0
DNS=8.8.8.8
So I used command

sudo nano /etc/systemd/network/eth0.network

Edit the file to

[Match] 
Name=eth0 
Type=ether 

[Link] 
RequiredForOnline=yes 

[Network] 
DHCP=no 
Address=192.168.7.51/24 
Gateway=192.168.7.151 
DNS=8.8.8.8

Save the file, then use the command

sudo systemctl restart systemd-networkd

Wait for 3-5 seconds, plugin the ethernet cable to BeagleBone Black, use command

ifconfig

Then we will see the eth0 ip address becomes static 192.168.7.51. After reboot, the static IP address is the same.

One more follow-up question:
I must use usb0 cable to connect to the PC, then ssh into the BBB, then plug the ethernet cable. If I plug both cables to the PC when boot up, I cannot ssh to the PC. Why is that?

Thanks a lot

1 Like