diff --git a/nova/network/linux_net.py b/nova/network/linux_net.py
index a9c8f913346b..e0887e61ff95 100644
--- a/nova/network/linux_net.py
+++ b/nova/network/linux_net.py
@@ -37,7 +37,6 @@ import six
 import nova.conf
 from nova import exception
 from nova.i18n import _
-from nova.network import linux_utils as linux_net_utils
 from nova import objects
 from nova.pci import utils as pci_utils
 import nova.privsep.linux_net
@@ -1671,7 +1670,7 @@ class LinuxOVSInterfaceDriver(LinuxNetInterfaceDriver):
                         'external-ids:attached-mac=%s' % mac_address])
             _execute('ip', 'link', 'set', dev, 'address', mac_address,
                      run_as_root=True)
-            linux_net_utils.set_device_mtu(dev, network.get('mtu'))
+            nova.privsep.linux_net.set_device_mtu(dev, network.get('mtu'))
             _execute('ip', 'link', 'set', dev, 'up', run_as_root=True)
             if not gateway:
                 # If we weren't instructed to act as a gateway then add the
diff --git a/nova/network/manager.py b/nova/network/manager.py
index d0a832aefb19..a801093a72b6 100644
--- a/nova/network/manager.py
+++ b/nova/network/manager.py
@@ -31,6 +31,7 @@ import math
 import re
 
 import netaddr
+from oslo_concurrency import processutils
 from oslo_log import log as logging
 import oslo_messaging as messaging
 from oslo_service import periodic_task
@@ -67,7 +68,7 @@ CONF = nova.conf.CONF
 
 def get_my_linklocal(interface):
     try:
-        if_str = utils.execute(
+        if_str = processutils.execute(
             'ip', '-f', 'inet6', '-o', 'addr', 'show', interface)
         condition = '\s+inet6\s+([0-9a-f:]+)/\d+\s+scope\s+link'
         links = [re.search(condition, x) for x in if_str[0].split('\n')]