Systemd/networkd: Difference between revisions

@@ Line 25: / Line 25: @@
 can write your complete network setup in native networkd configuration, you should
 stay away from that option.
+=== Configuring ===
+The configuration of networkd happens through one or multiple configuration files per
+interface stored in <code>/etc/systemd/network</code>.
+The following configuration in your NixOS configuration
+<syntaxhighlight lang="nix">
+  systemd.network.networks."10-lan" = {
+    matchConfig.Name = "lan";
+    networkConfig.DHCP = "ipv4";
+  };
+</syntaxhighlight>
+renders the following network configuration:
+{{file|/etc/systemd/network/10-lan.network|ini|<nowiki>
+[Match]
+Name=lan
+[Network]
+DHCP=ipv4
+</nowiki>}}
+Note that we usually prefix the configuration file with a number. This can be important,
+because networkd collects all available configuration files, then sorts them alphabetically,
+and uses the first match for each interface as its configuration. This happens separately
+for <code>.link</code>, <code>.netdev</code> and <code.network</code>, so that you
+can have one configuration of each type per interface.
 === Limitations ===