Port the BGP implementation of SDN-IP.
diff --git a/apps/sdnip/src/main/java/org/onlab/onos/sdnip/Router.java b/apps/sdnip/src/main/java/org/onlab/onos/sdnip/Router.java
index be54222..b309a7b 100644
--- a/apps/sdnip/src/main/java/org/onlab/onos/sdnip/Router.java
+++ b/apps/sdnip/src/main/java/org/onlab/onos/sdnip/Router.java
@@ -126,6 +126,8 @@
         bgpIntentsSynchronizerExecutor = Executors.newSingleThreadExecutor(
                 new ThreadFactoryBuilder()
                 .setNameFormat("bgp-intents-synchronizer-%d").build());
+
+        this.hostService.addListener(new InternalHostListener());
     }
 
     /**