diff --git a/EduNetworkBuilder/Network.cs b/EduNetworkBuilder/Network.cs
index 03a193c..2160f3f 100644
--- a/EduNetworkBuilder/Network.cs
+++ b/EduNetworkBuilder/Network.cs
@@ -1963,6 +1963,7 @@ namespace EduNetworkBuilder
                     break;
                 case HowToBreak.LockOutSwitch:
                     //Lock it out
+                    if (tDevice.DoesForwarding()) tDevice.LockUsOutOfDevice();
                     break;
                 case HowToBreak.StaticRouteClear:
                     //Clear out the static route(s)
diff --git a/EduNetworkBuilder/NetworkBuilder.cs b/EduNetworkBuilder/NetworkBuilder.cs
index 15e537f..4afdfd0 100644
--- a/EduNetworkBuilder/NetworkBuilder.cs
+++ b/EduNetworkBuilder/NetworkBuilder.cs
@@ -2170,7 +2170,7 @@ namespace EduNetworkBuilder
 
             TraversalCollection.Sort((a, b) => b.Count.CompareTo(a.Count));
 
-            List<HowToBreak> BreakList = new List<HowToBreak>() { HowToBreak.PowerOff, HowToBreak.EthernetBreak };
+            List<HowToBreak> BreakList = new List<HowToBreak>() { HowToBreak.PowerOff, HowToBreak.EthernetBreak, HowToBreak.LockOutSwitch };
             //foreach (HowToBreak one in Enum.GetValues(typeof(HowToBreak)))
             //    BreakList.Add(one);
             count = 0;
diff --git a/EduNetworkBuilder/NetworkCard.cs b/EduNetworkBuilder/NetworkCard.cs
index e9cb54e..689052d 100644
--- a/EduNetworkBuilder/NetworkCard.cs
+++ b/EduNetworkBuilder/NetworkCard.cs
@@ -785,6 +785,18 @@ namespace EduNetworkBuilder
             }
         }
 
+        public void LockUsOutOfCard()
+        {
+            foreach (NetworkInterface nf in interfaces)
+            {
+                if (myNicType != NicType.lo)
+                {
+                    nf.myIP = new IPAddress(NB.ZeroIPString);
+                    nf.LockOutVLANInterface();
+                }
+            }
+        }
+
         public NetworkInterface InterfaceFromVlanTag(Packet tPacket)
         {
             int ID = tPacket.VLANID;
diff --git a/EduNetworkBuilder/NetworkDevice.cs b/EduNetworkBuilder/NetworkDevice.cs
index 765ada7..e0bf383 100644
--- a/EduNetworkBuilder/NetworkDevice.cs
+++ b/EduNetworkBuilder/NetworkDevice.cs
@@ -1381,6 +1381,15 @@ namespace EduNetworkBuilder
             IPConnections.Clear();
         }
 
+        public void LockUsOutOfDevice()
+        {
+            foreach(NetworkCard nic in NICs)
+            {
+                if (nic.GetNicType == NicType.lo) continue;
+                nic.LockUsOutOfCard();
+            }
+        }
+
         public ResponseToPacket HowToRespondToPacket(Packet tPacket)
         {
             bool typesMatch=false;
diff --git a/EduNetworkBuilder/NetworkInterface.cs b/EduNetworkBuilder/NetworkInterface.cs
index 97128a0..d224940 100644
--- a/EduNetworkBuilder/NetworkInterface.cs
+++ b/EduNetworkBuilder/NetworkInterface.cs
@@ -127,6 +127,17 @@ namespace EduNetworkBuilder
                 VLANs.Add(new VLANInfo(id, Tag));
         }
 
+        public void LockOutVLANInterface()
+        {
+            Network theNet = NB.GetNetwork();
+            if (theNet == null)
+                return;
+            foreach(VLANName one in theNet.VlanNames)
+            {
+                SetVLANTag(one.ID, VLANTagType.Forbidden);
+            }
+        }
+
         public void Save(XmlWriter writer)
         {
             writer.WriteStartElement("interface");