kunsi-p14s: reinstate bridge, try disabling ipv6 on wifi

nodes/kunsi-p14s.py

@@ -36,14 +36,11 @@ nodes['kunsi-p14s'] = {
             },
         },
         'interfaces': {
-            'enp2s0f0':  {
+            'br0': {
+                #'ips': {'10.73.100.103/16'},
+                #'gateway4': '10.73.0.254',
                 'dhcp': True,
             },
-            'enp5s0': {
-                'ips': {'10.73.100.103/16'},
-                'gateway4': '10.73.0.254',
-                #'dhcp': True,
-            },
             # there is also wlp3s0, but that's managed by netctl
         },
         'nfs-client': {
@@ -108,6 +105,14 @@ nodes['kunsi-p14s'] = {
                 'xf86-input-wacom': {},
             },
         },
+        'sysctl': {
+            'options': {
+                # XXX temp, try to find out why the system randomly
+                # hangs when using wifi, but only after suspending or
+                # switching from ethernet.
+                'net.ipv6.conf.wlp3s0.disable_ipv6': '1',
+            },
+        },
         'systemd-boot': {
             'default': 'arch-lts',
             'entries': {
@@ -136,6 +141,16 @@ nodes['kunsi-p14s'] = {
                 },
             },
         },
+        'systemd-networkd': {
+            'bridges': {
+                'br0': {
+                    'match': {
+                        'enp2s0f0',
+                        'enp5s0',
+                    },
+                },
+            },
+        },
         'timezone': 'Europe/Berlin',
         'users': {
             'kunsi': {