Merged in FD3-477 (pull request #6)

FD3-477 se quitó campo pool en form de Subnet

src/IPv4Bundle/Admin/SubNetAdmin.php

@@ -52,9 +52,6 @@ class SubNetAdmin extends BaseAdmin
             ->add('options')
             ->add('allowedHostType')
             ->add('netGroup')
-            ->add('ipPool', null, [
-                'by_reference' => false
-            ])
         ;
     }