diff --git a/daemon/core/emulator/coreemu.py b/daemon/core/emulator/coreemu.py
index 6712227c..8fa6ffb9 100644
--- a/daemon/core/emulator/coreemu.py
+++ b/daemon/core/emulator/coreemu.py
@@ -378,7 +378,7 @@ class EmuSession(Session):
             if node_two:
                 node_two.lock.release()
 
-    def update_link(self, node_one_id, node_two_id, link_options, interface_one_id=None, interface_two_id=None):
+    def update_link(self, node_one_id, node_two_id, interface_one_id=None, interface_two_id=None, link_options=LinkOptions()):
         """
         Update link information between nodes.
 
diff --git a/daemon/core/netns/openvswitch.py b/daemon/core/netns/openvswitch.py
index 341ab92a..46ba2f2c 100644
--- a/daemon/core/netns/openvswitch.py
+++ b/daemon/core/netns/openvswitch.py
@@ -248,10 +248,10 @@ class OvsNet(PyCoreNet):
         if jitter is not None:
             netem += ["%sus" % jitter, "25%"]
 
-        if loss is not None:
+        if loss is not None and loss > 0:
             netem += ["loss", "%s%%" % min(loss, 100)]
 
-        if duplicate is not None:
+        if duplicate is not None and duplicate > 0:
             netem += ["duplicate", "%s%%" % min(duplicate, 100)]
 
         if delay <= 0 and jitter <= 0 and loss <= 0 and duplicate <= 0:
diff --git a/daemon/core/netns/vnet.py b/daemon/core/netns/vnet.py
index 545ca648..7a517d08 100644
--- a/daemon/core/netns/vnet.py
+++ b/daemon/core/netns/vnet.py
@@ -475,9 +475,9 @@ class LxBrNet(PyCoreNet):
             else:
                 netem += ["%sus" % jitter, "25%"]
 
-        if loss is not None:
+        if loss is not None and loss > 0:
             netem += ["loss", "%s%%" % min(loss, 100)]
-        if duplicate is not None:
+        if duplicate is not None and duplicate > 0:
             netem += ["duplicate", "%s%%" % min(duplicate, 100)]
         if delay <= 0 and jitter <= 0 and loss <= 0 and duplicate <= 0:
             # possibly remove netem if it exists and parent queue wasn't removed