diff --git a/src/oca/java/src/org/opennebula/client/vnet/VirtualNetwork.java b/src/oca/java/src/org/opennebula/client/vnet/VirtualNetwork.java
index ac58d7a316..9bd60df8d3 100644
--- a/src/oca/java/src/org/opennebula/client/vnet/VirtualNetwork.java
+++ b/src/oca/java/src/org/opennebula/client/vnet/VirtualNetwork.java
@@ -36,7 +36,8 @@ public class VirtualNetwork extends PoolElement{
     private static final String RMLEASES        = METHOD_PREFIX + "rmleases";
     private static final String CHOWN           = METHOD_PREFIX + "chown";
     private static final String UPDATE          = METHOD_PREFIX + "update";
-
+    private static final String HOLD            = METHOD_PREFIX + "hold";
+    private static final String RELEASE         = METHOD_PREFIX + "release";
 
     /**
      * Creates a new virtual network representation.
@@ -140,6 +141,32 @@ public class VirtualNetwork extends PoolElement{
         return client.call(RMLEASES, id, template);
     }
 
+    /**
+     * Holds a VirtualNetwork lease, marking it as used
+     *
+     * @param client XML-RPC Client.
+     * @param id The virtual network id (nid) of the target network.
+     * @param template IP to hold, e.g. "LEASES = [ IP = 192.168.0.5 ]"
+     * @return A encapsulated response.
+     */
+    public static OneResponse hold(Client client, int id, String template)
+    {
+        return client.call(HOLD, id, template);
+    }
+
+    /**
+     * Releases a VirtualNetwork lease on hold
+     *
+     * @param client XML-RPC Client.
+     * @param id The virtual network id (nid) of the target network.
+     * @param template IP to release, e.g. "LEASES = [ IP = 192.168.0.5 ]"
+     * @return A encapsulated response.
+     */
+    public static OneResponse release(Client client, int id, String template)
+    {
+        return client.call(RELEASE, id, template);
+    }
+
     /**
      * Changes the owner/group
      * 
@@ -271,6 +298,30 @@ public class VirtualNetwork extends PoolElement{
         return rmLeases(client, id, lease_template);
     }
 
+    /**
+     * Holds a VirtualNetwork lease, marking it as used
+     *
+     * @param ip IP to hold, e.g. "192.168.0.5"
+     * @return A encapsulated response.
+     */
+    public OneResponse hold(String ip)
+    {
+        String lease_template = "LEASES = [ IP = " + ip + " ]";
+        return hold(client, id, lease_template);
+    }
+
+    /**
+     * Releases a VirtualNetwork lease on hold
+     *
+     * @param ip IP to release, e.g. "192.168.0.5"
+     * @return A encapsulated response.
+     */
+    public OneResponse release(String ip)
+    {
+        String lease_template = "LEASES = [ IP = " + ip + " ]";
+        return release(client, id, lease_template);
+    }
+
     /**
      * Changes the owner/group
      * 
diff --git a/src/oca/java/test/VirtualNetworkTest.java b/src/oca/java/test/VirtualNetworkTest.java
index dcea0775e6..6a0c86537b 100644
--- a/src/oca/java/test/VirtualNetworkTest.java
+++ b/src/oca/java/test/VirtualNetworkTest.java
@@ -209,6 +209,54 @@ public class VirtualNetworkTest
         fixed_vnet.delete();
     }
 
+    @Test
+    public void holdFixed()
+    {
+        res = VirtualNetwork.allocate(client, fixed_template);
+        assertTrue( !res.isError() );
+
+        VirtualNetwork fixed_vnet =
+            new VirtualNetwork(Integer.parseInt(res.getMessage()), client);
+
+        res = fixed_vnet.hold("130.10.0.1");
+        assertTrue( !res.isError() );
+
+        res = fixed_vnet.hold("130.10.0.5");
+        assertTrue( res.isError() );
+
+        res = fixed_vnet.release("130.10.0.1");
+        assertTrue( !res.isError() );
+
+        res = fixed_vnet.release("130.10.0.1");
+        assertTrue( res.isError() );
+
+        res = fixed_vnet.release("130.10.0.5");
+        assertTrue( res.isError() );
+
+        fixed_vnet.delete();
+    }
+
+    @Test
+    public void holdRanged()
+    {
+        res = vnet.hold("192.168.0.10");
+        assertTrue( !res.isError() );
+
+        res = vnet.hold("192.168.100.1");
+        assertTrue( res.isError() );
+
+        res = vnet.release("192.168.0.10");
+        assertTrue( !res.isError() );
+
+        res = vnet.release("192.168.0.10");
+        assertTrue( res.isError() );
+
+        res = vnet.release("192.168.100.1");
+        assertTrue( res.isError() );
+
+        vnet.delete();
+    }
+
     @Test
     public void update()
     {