diff --git a/sample/netnsplan.yaml b/sample/netnsplan.yaml
index deb2ca2..819f3f3 100644
--- a/sample/netnsplan.yaml
+++ b/sample/netnsplan.yaml
@@ -1,15 +1,18 @@
 netns:
   sample1:
     ethernets:
-      eth0:
-        addresses:
-          - 192.168.10.1
       eth1:
         addresses:
           - 192.168.20.1
+        route:
+          - to: default
+            via: 192.168.20.254
+      post-script: |
+        sysctl --system
+        iptables-restore /etc/iptables/rules.v4
   sample2:
     ethernets:
-      eth0:
+      eth2:
         addresses:
           - 172.16.10.1
     dummy-devices: