diff --git a/hooks/pg_dir_hooks.py b/hooks/pg_dir_hooks.py
index 4d24fe2..94b547c 100644
--- a/hooks/pg_dir_hooks.py
+++ b/hooks/pg_dir_hooks.py
@@ -7,6 +7,7 @@
 
 import sys
 import time
+from charmhelpers.core.host import service_running
 
 from charmhelpers.core.hookenv import (
     Hooks,
@@ -21,8 +22,6 @@ from charmhelpers.fetch import (
     configure_sources,
 )
 
-from charmhelpers.core.host import service_running
-
 from pg_dir_utils import (
     register_configs,
     restart_pg,
@@ -78,15 +77,13 @@ def config_changed():
     if charm_config.changed('plumgrid-license-key'):
         if post_pg_license():
             log("PLUMgrid License Posted")
-    if charm_config.changed('network-device-mtu'):
-        ensure_mtu()
     if charm_config.changed('fabric-interfaces'):
         if not fabric_interface_changed():
             log("Fabric interface already set")
         else:
-            ensure_mtu()
             stop_pg()
     if charm_config.changed('plumgrid-virtual-ip'):
+        CONFIGS.write_all()
         stop_pg()
     if (charm_config.changed('install_sources') or
         charm_config.changed('plumgrid-build') or
@@ -99,6 +96,7 @@ def config_changed():
             apt_install(pkg, options=['--force-yes'], fatal=True)
             remove_iovisor()
             load_iovisor()
+    ensure_mtu()
     CONFIGS.write_all()
     if not service_running('plumgrid'):
         restart_pg()
diff --git a/hooks/pg_dir_utils.py b/hooks/pg_dir_utils.py
index 4023456..697ecbf 100644
--- a/hooks/pg_dir_utils.py
+++ b/hooks/pg_dir_utils.py
@@ -154,7 +154,6 @@ def restart_pg():
                     raise ValueError("plumgrid service couldn't be started")
             else:
                 raise ValueError("libvirt-bin service couldn't be started")
-    time.sleep(3)
 
 
 def stop_pg():
diff --git a/unit_tests/test_pg_dir_hooks.py b/unit_tests/test_pg_dir_hooks.py
index 04065bd..c453ca8 100644
--- a/unit_tests/test_pg_dir_hooks.py
+++ b/unit_tests/test_pg_dir_hooks.py
@@ -62,10 +62,6 @@ class PGDirHooksTests(CharmTestCase):
         self.load_iovisor.assert_called_with()
         self.ensure_mtu.assert_called_with()
 
-    def test_config_changed_hook(self):
-        self.add_lcm_key.return_value = 1
-        self._call_hook('config-changed')
-
     def test_start(self):
         self._call_hook('start')
         self.test_config.set('plumgrid-license-key', None)