feat(hosts/backstage): add network configuration

hosts/backstage/network.nix

@@ -10,9 +10,77 @@
   systemd.network = {
     enable = true;
     networks = {
-      "enp1s0" = {
+      "10-ethMgmt" = {
-        matchConfig.Name = "enp1s0";
+        matchConfig.Name = "ethMgmt";
-        DHCP = "yes";
+        address = [
+          "10.42.10.50/24"
+        ];
+        linkConfig.RequiredForOnline = false;
+      };
+      "20-sfp-port-1" = {
+        matchConfig.Name = "sfp1";
+        linkConfig.Unmanaged = true;
+        linkConfig.RequiredForOnline = false;
+      };
+      "21-sfp-port-2" = {
+        matchConfig.Name = "sfp2";
+        linkConfig.Unmanaged = true;
+        linkConfig.RequiredForOnline = false;
+      };
+      "30-infra" = {
+        matchConfig.Name = "br-infra";
+        #address = [
+        #  "10.9.75.1/24"
+        #];
+        linkConfig.Unmanaged = true;
+        linkConfig.RequiredForOnline = false;
+      };
+      "31-clients" = {
+        matchConfig.Name = "br-clients";
+        #address = [
+        #  "10.10.75.1/24"
+        #];
+        linkConfig.Unmanaged = true;
+        linkConfig.RequiredForOnline = false;
+      };
+      "32-ffka" = {
+        matchConfig.Name = "br-ffka";
+        linkConfig.Unmanaged = true;
+        linkConfig.RequiredForOnline = false;
+      };
+    };
+    netdevs = {
+      "10-br-infra" = {
+        netdevConfig = {
+          Kind = "bridge";
+          Name = "br-infra";
+        };
+      };
+      "11-br-clients" = {
+        netdevConfig = {
+          Kind = "bridge";
+          Name = "br-clients";
+        };
+      };
+      "12-br-ffka" = {
+        netdevConfig = {
+          Kind = "bridge";
+          Name = "br-ffka";
+        };
+      };
+    };
+    links = {
+      "10-ethMgmt" = {
+        linkConfig.Name = "ethMgmt";
+        matchConfig.MACAddress = "9c:6b:00:8d:d0:8f";
+      };
+      "20-sfp-port-1" = {
+        linkConfig.Name = "sfp1";
+        matchConfig.MACAddress = "90:e2:ba:2e:ea:70";
+      };
+      "20-sfp-port-2" = {
+        linkConfig.Name = "sfp2";
+        matchConfig.MACAddress = "90:e2:ba:2e:ea:71";
       };
     };
   };