diff --git a/bundles/openstack/bundle_template.juju2.yaml b/bundles/openstack/bundle_template.juju2.yaml
index 3c45eb4dfe5a50df45ad033d35dffd00ab4aeb95..a5bf69f0d0c8c9fca867be3a0573bf80aa29fe46 100644
--- a/bundles/openstack/bundle_template.juju2.yaml
+++ b/bundles/openstack/bundle_template.juju2.yaml
@@ -1,3 +1,6 @@
+## Sample bundle for the deployment of OpenStack in a region of the
+## GARR Federated Cloud Platform.
+
 variables:
 
   # sources
@@ -51,7 +54,8 @@ variables:
   bridge-mappings: &bridge_mappings                ext_net:br-ex
   network-device-mtu: &network_device_mtu  1500
   instance-mtu: &instance_mtu  1400
-#FG 2017-02-15 not working, silently keep default (gre)#  overlay-network-type: &overlay_network_type
+#FG 2017-02-15 not working, silently keep default (gre)
+#  overlay-network-type: &overlay_network_type
   enable-dvr: &dvr-mode                             True
   vlan-ranges: &vlan_ranges                         physnet-ovs:801:801
 
@@ -86,6 +90,7 @@ variables:
 #FG#  enable-local-dhcp-and-metadata: &enable_local_dhcp_and_metadata   True
 #FG#  neutron-network-dvr: &neutron-dvr                 True
 
+# ------------------------------------------------------------------------------
 machines:
   '0':
     constraints: arch=amd64 tags=neutron-gw
@@ -103,7 +108,7 @@ machines:
     constraints: arch=amd64 tags=compute
     series: *series
 
-
+# ------------------------------------------------------------------------------
 services:
   controller:
     charm: cs:ubuntu