diff --git a/core/api/src/main/java/org/onlab/onos/net/PortNumber.java b/core/api/src/main/java/org/onlab/onos/net/PortNumber.java
index d5fc5f2..93ec91d 100644
--- a/core/api/src/main/java/org/onlab/onos/net/PortNumber.java
+++ b/core/api/src/main/java/org/onlab/onos/net/PortNumber.java
@@ -9,8 +9,17 @@
  */
 public final class PortNumber {
 
+    // TODO: revisit the max and the logical port value assignments
+
     private static final long MAX_NUMBER = (2L * Integer.MAX_VALUE) + 1;
 
+    public static final PortNumber FLOOD = new PortNumber(-1);
+    public static final PortNumber IN_PORT = new PortNumber(-2);
+    public static final PortNumber TABLE = new PortNumber(-3);
+    public static final PortNumber NORMAL = new PortNumber(-4);
+    public static final PortNumber ALL = new PortNumber(-4);
+    public static final PortNumber LOCAL = new PortNumber(-5);
+
     private final long number;
 
     // Public creation is prohibited
@@ -39,6 +48,16 @@
     }
 
     /**
+     * Indicates whether or not this port number is a reserved logical one or
+     * whether it corresponds to a normal physical port of a device or NIC.
+     *
+     * @return true if logical port number
+     */
+    public boolean isLogical() {
+        return number < 0 || number > MAX_NUMBER;
+    }
+
+    /**
      * Returns the backing long value.
      *
      * @return port number as long