From 7bce6df38b0e08a495858ca70f96585b2b4894a7 Mon Sep 17 00:00:00 2001
From: JuliusFreudenberger <julius+git@jfreudenberger.de>
Date: Tue, 12 Aug 2025 00:39:41 +0200
Subject: [PATCH] Working bridge configuration using systemd-networkd

---
 hosts/nixos-server-test/default.nix | 33 ++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

diff --git a/hosts/nixos-server-test/default.nix b/hosts/nixos-server-test/default.nix
index 00afad0..9b7f27d 100644
--- a/hosts/nixos-server-test/default.nix
+++ b/hosts/nixos-server-test/default.nix
@@ -36,16 +36,39 @@
 
   services.proxmox-ve = {
     enable = true;
-    ipAddress = "192.168.122.42";
+    ipAddress = "192.168.122.71";
 
     # Make vmbr0 bridge visible in Proxmox web interface
     bridges = [ "vmbr0" ];
   };
 
-  # Actually set up the vmbr0 bridge
-  networking = {
-    bridges.vmbr0.interfaces = [ "enp1s0" ];
-    interfaces.vmbr0.useDHCP = lib.mkDefault true;
+  networking.useDHCP = false;
+
+  systemd.network = {
+    enable = true;
+
+    networks."10-lan" = {
+      matchConfig.Name = [ "enp1s0" ];
+      networkConfig = {
+        Bridge = "vmbr0";
+      };
+    };
+
+    netdevs."vmbr0" = {
+      netdevConfig = {
+        Name = "vmbr0";
+        Kind = "bridge";
+      };
+    };
+
+    networks."10-lan-bridge" = {
+      matchConfig.Name = "vmbr0";
+      networkConfig = {
+        IPv6AcceptRA = true;
+        DHCP = "ipv4";
+      };
+      linkConfig.RequiredForOnline = "routable";
+    };
   };
 
   # This option defines the first version of NixOS you have installed on this particular machine,