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+# Ad-Hoc Configuration {#ad-hoc-network-config}
+
+You can use [](#opt-networking.localCommands) to
+specify shell commands to be run at the end of `network-setup.service`. This
+is useful for doing network configuration not covered by the existing NixOS
+modules. For instance, to statically configure an IPv6 address:
+
+```nix
+networking.localCommands =
+  ''
+    ip -6 addr add 2001:610:685:1::1/64 dev eth0
+  '';
+```