diff --git a/postservice/31-one-netmng b/postservice/31-one-netmng
index 21eec1c..e41b9bf 100755
--- a/postservice/31-one-netmng
+++ b/postservice/31-one-netmng
@@ -274,6 +274,10 @@ class OneNetworkL2(OneNetwork):
         if self.net_size:
             template.write("AR=[\n")
             template.write('  TYPE = "ETHER",\n')
+
+            if self.first_mac:
+                template.write('  MAC = "{0}",\n'.format(self.first_mac))
+
             template.write('  SIZE = "{0}"\n'.format(self.net_size))
             template.write("]\n")
         template.close()