diff --git a/kvmagent/kvmagent/plugins/tf_net_userdata_plugin.py b/kvmagent/kvmagent/plugins/tf_net_userdata_plugin.py
index 31858929471096b28fdc9b9e142eaa0ff35dc02b..efe7433e3f9b5ab30897c1ca4f4197ff3babb74c 100644
--- a/kvmagent/kvmagent/plugins/tf_net_userdata_plugin.py
+++ b/kvmagent/kvmagent/plugins/tf_net_userdata_plugin.py
@@ -238,7 +238,7 @@ class TfNetProviderUserdata(kvmagent.KvmAgent):
         conf_path = os.path.join(self.TF_USERDATA_ROOT, 'lighttpd.conf')
         pid = linux.find_process_by_cmdline([conf_path])
         if pid:
-            linux.kill_process(pid)
+            linux.kill_process(pid, timeout=10)
 
         linux.mkdir('/var/log/lighttpd', 0o750)
         # restart lighttpd to load new configuration
diff --git a/kvmagent/kvmagent/plugins/vm_plugin.py b/kvmagent/kvmagent/plugins/vm_plugin.py
index 053089a5ca44824571ec67f663039347d7a8e740..3b69796f1d6eeb6d4282a87c1e256d631a3155d0 100644
--- a/kvmagent/kvmagent/plugins/vm_plugin.py
+++ b/kvmagent/kvmagent/plugins/vm_plugin.py
@@ -4659,6 +4659,8 @@ class Vm(object):
                 e(interface, 'driver', None, attrib={'queues': '8'})
         elif nic.type == 'TFVNIC':
             e(interface, 'target', None, attrib={'dev': nic.nicInternalName})
+            driver = e(interface, 'driver', None, attrib={'name': 'vhost'})
+            e(driver, 'host', None, attrib={'csum': 'off'})
         else:
             e(interface, 'source', None, attrib={'bridge': nic.bridgeName})
             e(interface, 'target', None, attrib={'dev': nic.nicInternalName})