Implement east-west communication for k8s network

Change-Id: Ibac91b7a856e35a26cf0e0f23d6d01f65197625d
diff --git a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java
index 13b1f47..4abc2cb 100644
--- a/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java
+++ b/apps/k8s-node/api/src/main/java/org/onosproject/k8snode/api/K8sNode.java
@@ -118,6 +118,13 @@
     PortNumber genevePortNum();
 
     /**
+     * Returns the host port number.
+     *
+     * @return host port number; null if the host port does not exist
+     */
+    PortNumber intBridgePortNum();
+
+    /**
      * Builder of new node entity.
      */
     interface Builder {