diff --git a/openflow/api/src/main/java/org/onosproject/openflow/controller/OpenFlowSwitch.java b/openflow/api/src/main/java/org/onosproject/openflow/controller/OpenFlowSwitch.java
index 4dbbaf5..3b8358f 100644
--- a/openflow/api/src/main/java/org/onosproject/openflow/controller/OpenFlowSwitch.java
+++ b/openflow/api/src/main/java/org/onosproject/openflow/controller/OpenFlowSwitch.java
@@ -142,4 +142,9 @@
      */
     public boolean isOptical();
 
+    /**
+     * Identifies the channel used to communicate with the switch.
+     */
+    public String channelId();
+
 }