diff --git a/apps/t3/app/src/main/java/org/onosproject/t3/api/TroubleshootService.java b/apps/t3/app/src/main/java/org/onosproject/t3/api/TroubleshootService.java
index a21baf5..9838e04 100644
--- a/apps/t3/app/src/main/java/org/onosproject/t3/api/TroubleshootService.java
+++ b/apps/t3/app/src/main/java/org/onosproject/t3/api/TroubleshootService.java
@@ -83,4 +83,17 @@
      * @return a list of trace result
      */
     List<Set<StaticPacketTrace>> getMulitcastTrace(VlanId vlanId);
+
+    /**
+     * Checks the availability of all NIBs of the manager.
+     *
+     * @return true if any NIB objects is unavailable
+     */
+    boolean checkNibsUnavailable();
+
+    /**
+     * Applies created NIBs to the manager.
+     */
+    void applyNibs();
+
 }