Update ipv4_static_interfaces.cfg

Linux_reinstall/Ubuntu/CloudInit/ipv4_static_interfaces.cfg

@@ -35,19 +35,16 @@ chpasswd:
 
 # configure network
 network:
-  version: 1
-  config:
-  - type: physical
-    name: eth0
-    subnets:
-      - type: static
-          address: IPv4
-          netmask: MASK
-          gateway: GATE
-          dns_nameservers:
-            - ipDNS1
-            - ipDNS2
-      - type: dhcp6
+  version: 2
+  ethernets:
+    eth0:
+      dhcp4: false
+      addresses:
+        - IPv4/ipPrefix
+      gateway4: GATE
+      nameservers:
+        addresses: [ipDNS1, ipDNS2]
+      dhcp6: true
 
 # later commands
 runcmd: