private VCPENetworkModel hierarchicalLRnames(VCPENetworkModel model) {
   for (LogicalRouter lr :
       Iterables.filter(
           VCPENetworkModelHelper.getRouters(model.getElements()), LogicalRouter.class)) {
     lr.setName(model.getName() + "-" + lr.getName());
   }
   return model;
 }