diff --git a/ops/nixos/kerrigan/default.nix b/ops/nixos/kerrigan/default.nix
index 8a7751482a..e6868bfa13 100644
--- a/ops/nixos/kerrigan/default.nix
+++ b/ops/nixos/kerrigan/default.nix
@@ -34,6 +34,8 @@ in
     "net.ipv4.ip_forward" = "1";
     "net.ipv6.conf.default.forwarding" = "1";
     "net.ipv6.conf.all.forwarding" = "1";
+    "net.ipv6.conf.default.accept_ra_from_local" = "1";
+    "net.ipv6.conf.all.accept_ra_from_local" = "1";
   };
 
   networking = {
@@ -44,7 +46,7 @@ in
     networkmanager = {
       enable = true;
       dns = "systemd-resolved";
-      unmanaged = [ "eth1" "eth2" ];
+      unmanaged = [ "*,except:type:gsm" ];
       extraConfig = ''
         [main]
         no-auto-default=*
@@ -65,6 +67,36 @@ in
   users.users.lukegb.extraGroups = lib.mkAfter [ "networkmanager" ];
   my.systemType = "aarch64-linux";
 
+  systemd.network.netdevs.br0 = {
+    netdevConfig = {
+      Name = "br0";
+      Kind = "bridge";
+    };
+  };
+  systemd.network.networks.br0 = {
+    matchConfig.Name = "br0";
+    networkConfig = {
+      LinkLocalAddressing = "ipv6";
+      Address = "10.42.0.1/24";
+      IPForward = true;
+      IPMasquerade = "ipv4";
+      IPv6AcceptRA = true;
+      DHCPServer = true;
+    };
+    ipv6AcceptRAConfig = {
+      UseGateway = false;
+      RouteMetric = 100;
+    };
+    dhcpServerConfig = {
+      PoolOffset = 100;
+      PoolSize = 100;
+    };
+  };
+  systemd.network.networks.links-to-bridge = {
+    matchConfig.Name = "lan*";
+    networkConfig.Bridge = "br0";
+  };
+
   systemd.services.ModemManager = {
     wantedBy = [ "network.target" ];
   };
@@ -85,6 +117,7 @@ in
     enable = true;
     config = ''
       interface br0 {
+        IgnoreIfMissing on;
         AdvSendAdvert on;
         AdvLinkMTU 1280;
 
@@ -92,10 +125,12 @@ in
           Base6Interface wwan0;
           AdvValidLifetime 600;
           AdvPreferredLifetime 300;
-        }
-      }
+        };
+      };
     '';
   };
 
+  systemd.services."systemd-networkd-wait-online".wantedBy = lib.mkForce [];
+
   system.stateVersion = "23.05";
 }
diff --git a/ops/nixos/kerrigan/networkmanager/bridge-br0.nmconnection b/ops/nixos/kerrigan/networkmanager/bridge-br0.nmconnection
deleted file mode 100644
index 9de486bf17..0000000000
--- a/ops/nixos/kerrigan/networkmanager/bridge-br0.nmconnection
+++ /dev/null
@@ -1,19 +0,0 @@
-[connection]
-id=bridge-br0
-uuid=bb1df01a-67f4-44f6-99b7-a94a8d91c00e
-type=bridge
-interface-name=br0
-
-[ethernet]
-
-[bridge]
-forward-delay=3
-
-[ipv4]
-method=shared
-
-[ipv6]
-addr-gen-mode=default
-method=shared
-
-[proxy]
diff --git a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan0.nmconnection b/ops/nixos/kerrigan/networkmanager/bridge-slave-lan0.nmconnection
deleted file mode 100644
index af85522b10..0000000000
--- a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan0.nmconnection
+++ /dev/null
@@ -1,11 +0,0 @@
-[connection]
-id=bridge-slave-lan0
-uuid=a9bee559-325f-4ac4-9c02-b129d08b0c03
-type=ethernet
-interface-name=lan0
-master=br0
-slave-type=bridge
-
-[ethernet]
-
-[bridge-port]
diff --git a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan1.nmconnection b/ops/nixos/kerrigan/networkmanager/bridge-slave-lan1.nmconnection
deleted file mode 100644
index d5f8287ee5..0000000000
--- a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan1.nmconnection
+++ /dev/null
@@ -1,11 +0,0 @@
-[connection]
-id=bridge-slave-lan1
-uuid=a1d80f6a-a7c8-4888-911f-82041324ab84
-type=ethernet
-interface-name=lan1
-master=br0
-slave-type=bridge
-
-[ethernet]
-
-[bridge-port]
diff --git a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan2.nmconnection b/ops/nixos/kerrigan/networkmanager/bridge-slave-lan2.nmconnection
deleted file mode 100644
index 31c8120a42..0000000000
--- a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan2.nmconnection
+++ /dev/null
@@ -1,11 +0,0 @@
-[connection]
-id=bridge-slave-lan2
-uuid=99e29121-71a4-40d1-886f-fa10410a4897
-type=ethernet
-interface-name=lan2
-master=br0
-slave-type=bridge
-
-[ethernet]
-
-[bridge-port]
diff --git a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan3.nmconnection b/ops/nixos/kerrigan/networkmanager/bridge-slave-lan3.nmconnection
deleted file mode 100644
index 7e92858778..0000000000
--- a/ops/nixos/kerrigan/networkmanager/bridge-slave-lan3.nmconnection
+++ /dev/null
@@ -1,11 +0,0 @@
-[connection]
-id=bridge-slave-lan3
-uuid=8943379a-dc7a-453d-a16a-6be42e842f2c
-type=ethernet
-interface-name=lan3
-master=br0
-slave-type=bridge
-
-[ethernet]
-
-[bridge-port]