diff --git a/manila/network/linux/interface.py b/manila/network/linux/interface.py
index b5a7f8012c..03d580c126 100644
--- a/manila/network/linux/interface.py
+++ b/manila/network/linux/interface.py
@@ -143,7 +143,7 @@ class OVSInterfaceDriver(LinuxInterfaceDriver):
 
         if not ip_lib.device_exists(device_name,
                                     namespace=namespace):
-
+            LOG.info("Device %s does not exist - creating ....", device_name)
             tap_name = self._get_tap_name(device_name)
             self._ovs_add_port(bridge, tap_name, port_id, mac_address)
             ns_dev.link.set_address(mac_address)
@@ -154,7 +154,7 @@ class OVSInterfaceDriver(LinuxInterfaceDriver):
                 namespace_obj.add_device_to_namespace(ns_dev)
 
         else:
-            LOG.warning("Device %s already exists.", device_name)
+            LOG.info("Device %s already exists.", device_name)
             if ns_dev.link.address != mac_address:
                 LOG.warning("Reset mac address to %s", mac_address)
                 ns_dev.link.set_address(mac_address)
diff --git a/manila/share/drivers/generic.py b/manila/share/drivers/generic.py
index 949599ddc6..e2bcd8f052 100644
--- a/manila/share/drivers/generic.py
+++ b/manila/share/drivers/generic.py
@@ -141,6 +141,8 @@ class GenericShareDriver(driver.ExecuteMixin, driver.ShareDriver):
                 driver_config=self.configuration))
 
     def _ssh_exec(self, server, command, check_exit_code=True):
+        LOG.debug("_ssh_exec - server: %s, command: %s, check_exit_code: %s",
+                  server, command, check_exit_code)
         connection = self.ssh_connections.get(server['instance_id'])
         ssh_conn_timeout = self.configuration.ssh_conn_timeout
         if not connection:
diff --git a/manila/share/drivers/service_instance.py b/manila/share/drivers/service_instance.py
index 0369173a81..6d4347bf63 100644
--- a/manila/share/drivers/service_instance.py
+++ b/manila/share/drivers/service_instance.py
@@ -949,6 +949,8 @@ class NeutronNetworkHelper(BaseNetworkhelper):
         and setting up required network devices.
         """
         if self.use_service_network:
+            LOG.debug("Plugging service instance into service network %s.",
+                      self.service_network_id)
             port = self._get_service_port(
                 self.service_network_id, None, 'manila-share')
             port = self._add_fixed_ips_to_service_port(port)
@@ -957,6 +959,8 @@ class NeutronNetworkHelper(BaseNetworkhelper):
             self._plug_interface_in_host(interface_name, device, port)
 
         if self.use_admin_port:
+            LOG.debug("Plugging service instance into admin network %s.",
+                      self.admin_network_id)
             port = self._get_service_port(
                 self.admin_network_id, self.admin_subnet_id,
                 'manila-admin-share')
@@ -971,6 +975,8 @@ class NeutronNetworkHelper(BaseNetworkhelper):
                         external=True)
     def _plug_interface_in_host(self, interface_name, device, port):
 
+        LOG.debug("Plug interface into host - interface_name: %s, "
+                  "device: %s, port: %s", interface_name, device, port)
         self.vif_driver.plug(interface_name, port['id'], port['mac_address'])
         ip_cidrs = []
         for fixed_ip in port['fixed_ips']:
diff --git a/manila/utils.py b/manila/utils.py
index 1a38a4a71c..05792dbaf1 100644
--- a/manila/utils.py
+++ b/manila/utils.py
@@ -30,6 +30,7 @@ import tempfile
 import time
 
 from eventlet import pools
+import logging
 import netaddr
 from oslo_concurrency import lockutils
 from oslo_concurrency import processutils
@@ -93,6 +94,8 @@ def execute(*cmd, **kwargs):
     """Convenience wrapper around oslo's execute() function."""
     if 'run_as_root' in kwargs and 'root_helper' not in kwargs:
         kwargs['root_helper'] = _get_root_helper()
+    if hasattr('CONF', 'debug') and CONF.debug:
+        kwargs['loglevel'] = logging.DEBUG
     return processutils.execute(*cmd, **kwargs)