View source for How to configure network using systemd-networkd in Yocto

== How to configure network using systemd-networkd in Yocto ==

When using '''Yocto Project''' it sometimes may be necessary to setup a '''static IP address''' via a custom recipe.

When the network manager is '''systemd-networkd''' the file usually responsible for that is '''/lib/systemd/network/80-wired.network'''

Simply change it from the original

    # cat /lib/systemd/network/80-wired.network
    
    [Match]
    Type=ether
    Name=!veth*
    KernelCommandLine=!nfsroot
    KernelCommandLine=!ip
    
    [Network]
    DHCP=yes
    
    [DHCP]
    UseMTU=yes
    RouteMetric=10
    ClientIdentifier=mac

To the following

    # cat /lib/systemd/network/80-wired.network
    
    [Match]
    Type=ether
    Name=eth0
    KernelCommandLine=!nfsroot
    KernelCommandLine=!ip
    
    [Network]
    Address=192.168.0.184/24
    Gateway=192.168.0.1
    DNS=1.1.1.1
    
    [DHCP]
    UseMTU=yes
    RouteMetric=10
    ClientIdentifier=mac

Below is an example of a possible solution

Create a '''.bbappend''' recipe to manage that and replace the existing '''wired.network''' file with your custom one

  meta-custom/
   └─ recipes-core/
      └── systemd-conf
          ├── systemd-conf
          │   └── wired.network
          └── systemd-conf_%.bbappend


The recipe systemd-conf_%.bbappend

    # recipes-core/systemd-conf/systemd-conf_%.bbappend 
    
    FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"


The network file

     # wired.network 
    
    [Match]
    Type=ether
    Name=eth0
    KernelCommandLine=!nfsroot
    KernelCommandLine=!ip
    
    [Network]
    Address=192.168.0.184/24
    Gateway=192.168.0.1
    DNS=1.1.1.1
        
    [DHCP]
    UseMTU=yes
    RouteMetric=10
    ClientIdentifier=mac