diff --git a/tripleo_common/actions/templates.py b/tripleo_common/actions/templates.py
index 77194206c..b3d096b06 100644
--- a/tripleo_common/actions/templates.py
+++ b/tripleo_common/actions/templates.py
@@ -161,6 +161,16 @@ class ProcessTemplatesAction(base.TripleOAction):
                      % constants.OVERCLOUD_J2_ROLES_NAME)
             return
 
+        try:
+            j2_network_file = swift.get_object(
+                self.container, constants.OVERCLOUD_J2_NETWORKS_NAME)[1]
+            network_data = yaml.safe_load(j2_network_file)
+        except swiftexceptions.ClientException:
+            # Until t-h-t contains network_data.yaml we tolerate a missing file
+            LOG.warning("No %s file found, ignoring"
+                        % constants.OVERCLOUD_J2_ROLES_NAME)
+            network_data = []
+
         j2_excl_data = self._get_j2_excludes_file()
 
         try:
@@ -211,7 +221,7 @@ class ProcessTemplatesAction(base.TripleOAction):
             elif f.endswith('.j2.yaml'):
                 LOG.info("jinja2 rendering %s" % f)
                 j2_template = swift.get_object(self.container, f)[1]
-                j2_data = {'roles': role_data}
+                j2_data = {'roles': role_data, 'networks': network_data}
                 out_f = f.replace('.j2.yaml', '.yaml')
                 self._j2_render_and_put(j2_template, j2_data, out_f)
 
diff --git a/tripleo_common/constants.py b/tripleo_common/constants.py
index a6e4e47cc..cb4868201 100644
--- a/tripleo_common/constants.py
+++ b/tripleo_common/constants.py
@@ -23,6 +23,9 @@ OVERCLOUD_J2_NAME = "overcloud.j2.yaml"
 #: The name of custom roles data file used when rendering the jinja template.
 OVERCLOUD_J2_ROLES_NAME = "roles_data.yaml"
 
+#: The name of custom roles network data file used when rendering j2 templates.
+OVERCLOUD_J2_NETWORKS_NAME = "network_data.yaml"
+
 #: The name of custom roles excl file used when rendering the jinja template.
 OVERCLOUD_J2_EXCLUDES = "j2_excludes.yaml"
 
diff --git a/tripleo_common/tests/actions/test_templates.py b/tripleo_common/tests/actions/test_templates.py
index 96d899194..25cb027f7 100644
--- a/tripleo_common/tests/actions/test_templates.py
+++ b/tripleo_common/tests/actions/test_templates.py
@@ -40,6 +40,11 @@ ROLE_DATA_YAML = r"""
   name: CustomRole
 """
 
+NETWORK_DATA_YAML = r"""
+-
+  name: anetwork
+"""
+
 EXPECTED_JINJA_RESULT = r"""
 # Jinja loop for Role in role_data.yaml
 
@@ -239,11 +244,15 @@ class ProcessTemplatesActionTest(base.TestCase):
                 return ['', J2_EXCLUDES]
             elif args[1] == constants.OVERCLOUD_J2_ROLES_NAME:
                 return ['', ROLE_DATA_YAML]
+            elif args[1] == constants.OVERCLOUD_J2_NETWORKS_NAME:
+                return ['', NETWORK_DATA_YAML]
 
         def return_container_files(*args):
-            return ('headers', [{'name': constants.OVERCLOUD_J2_NAME},
-                                {'name': 'foo.j2.yaml'},
-                                {'name': constants.OVERCLOUD_J2_ROLES_NAME}])
+            return ('headers', [
+                {'name': constants.OVERCLOUD_J2_NAME},
+                {'name': 'foo.j2.yaml'},
+                {'name': constants.OVERCLOUD_J2_ROLES_NAME},
+                {'name': constants.OVERCLOUD_J2_NETWORKS_NAME}])
 
         # setup swift
         swift = mock.MagicMock()
@@ -289,11 +298,15 @@ class ProcessTemplatesActionTest(base.TestCase):
                 return ['', J2_EXCLUDES]
             elif args[1] == constants.OVERCLOUD_J2_ROLES_NAME:
                 return ['', ROLE_DATA_DISABLE_CONSTRAINTS_YAML]
+            elif args[1] == constants.OVERCLOUD_J2_NETWORKS_NAME:
+                return ['', NETWORK_DATA_YAML]
 
         def return_container_files(*args):
-            return ('headers', [{'name': constants.OVERCLOUD_J2_NAME},
-                                {'name': 'disable-constraints.role.j2.yaml'},
-                                {'name': constants.OVERCLOUD_J2_ROLES_NAME}])
+            return ('headers', [
+                {'name': constants.OVERCLOUD_J2_NAME},
+                {'name': 'disable-constraints.role.j2.yaml'},
+                {'name': constants.OVERCLOUD_J2_ROLES_NAME},
+                {'name': constants.OVERCLOUD_J2_NETWORKS_NAME}])
 
         # setup swift
         swift = mock.MagicMock()