diff --git a/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java b/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java
index 08c1fa2..35c31ab 100755
--- a/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java
+++ b/bgp/ctl/src/main/java/org/onosproject/bgp/controller/impl/BGPControllerImpl.java
@@ -16,7 +16,9 @@
 
 package org.onosproject.bgp.controller.impl;
 
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CopyOnWriteArraySet;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 
@@ -28,6 +30,8 @@
 import org.onosproject.bgp.controller.BGPController;
 import org.onosproject.bgp.controller.BGPId;
 import org.onosproject.bgp.controller.BGPPeer;
+import org.onosproject.bgp.controller.BgpLinkListener;
+import org.onosproject.bgp.controller.BgpNodeListener;
 import org.onosproject.bgp.controller.BgpPeerManager;
 import org.onosproject.bgpio.exceptions.BGPParseException;
 import org.onosproject.bgpio.protocol.BGPMessage;
@@ -43,6 +47,10 @@
     protected ConcurrentHashMap<BGPId, BGPPeer> connectedPeers = new ConcurrentHashMap<BGPId, BGPPeer>();
 
     protected BGPPeerManagerImpl peerManager = new BGPPeerManagerImpl();
+
+    protected Set<BgpNodeListener> bgpNodeListener = new CopyOnWriteArraySet<>();
+    protected Set<BgpLinkListener> bgpLinkListener = new CopyOnWriteArraySet<>();
+
     final Controller ctrl = new Controller(this);
 
     private BGPConfig bgpconfig = new BGPConfig();
@@ -72,6 +80,36 @@
     }
 
     @Override
+    public void addListener(BgpNodeListener listener) {
+        this.bgpNodeListener.add(listener);
+    }
+
+    @Override
+    public void removeListener(BgpNodeListener listener) {
+        this.bgpNodeListener.remove(listener);
+    }
+
+    @Override
+    public Set<BgpNodeListener> listener() {
+        return bgpNodeListener;
+    }
+
+    @Override
+    public void addLinkListener(BgpLinkListener listener) {
+        this.bgpLinkListener.add(listener);
+    }
+
+    @Override
+    public void removeLinkListener(BgpLinkListener listener) {
+        this.bgpLinkListener.remove(listener);
+    }
+
+    @Override
+    public Set<BgpLinkListener> linkListener() {
+        return bgpLinkListener;
+    }
+
+    @Override
     public void writeMsg(BGPId bgpId, BGPMessage msg) {
         this.getPeer(bgpId).sendMessage(msg);
     }