Setting Static IP Address¶

In order to configure a static IP address, an entry needs to be made in systemd-network configuration directory

• Enter systemd-network directory
  

  root@mitysom-am57x:~# cd /etc/systemd/network/
  

• By default there is a 15-eth.network which matches all eth* devices and configures them for dhcp
  

  root@mitysom-am57x:/etc/systemd/network# cat 15-eth.network
  [Match]
  Name=eth*
  KernelCommandLine=!root=/dev/nfs
  
  [Link]
  RequiredForOnline=no
  
  [Network]
  DHCP=yes
  

• And there is 10-eth.network which only matches eth0, this has priority since the number is lower
  

  root@mitysom-am57x:/etc/systemd/network# cat 10-eth.network
  [Match]
  Name=eth0
  KernelCommandLine=!root=/dev/nfs
  
  [Network]
  DHCP=yes
  

• To configure eth0 for example to a static ip address, we create a 01-eth0.network file.
  

  root@mitysom-am57x:/etc/systemd/network# vi 01-eth0.network
  [Match]
  Name=eth0
  KernelCommandLine=!root=/dev/nfs
  
  [Network]
  Address=192.168.0.29/24
  Gateway=192.168.0.1
  

  
  This will take precedence since it is the lowest number
  

  root@mitysom-am57x:/etc/systemd/network# ls
  01-eth0.network            30-wlan.network
  10-eth.network             50-usb-dhcpserver.network
  15-eth.network             60-usb.network
  

• Restart the network service
  

  root@mitysom-am57x:/etc/systemd/network# systemctl restart systemd-networkd
  

• Verify the assigned address
  • Note that the assigned static address will only appear if a cable is plugged in.
    

    root@mitysom-am57x:/etc/systemd/network# ip address
    root@mitysom-am57x:/etc/systemd/network# ip address show dev eth0