code: def get_dummy_router_net(self, tenant_id):
          
          if tenant_id not in self.service_attr:
              LOG.error("Fabric not prepared for tenant %s", tenant_id)
              return
          tenant_obj = self.get_service_obj(tenant_id)
          return tenant_obj.get_dummy_router_net()
docs: Retrieves the dummy router information from service object.