diff --git a/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/util/Dpid.java b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/util/Dpid.java
new file mode 100644
index 0000000..dec8424
--- /dev/null
+++ b/of/ctl/src/main/java/org/onlab/onos/of/controller/impl/util/Dpid.java
@@ -0,0 +1,74 @@
+package org.onlab.onos.of.controller.impl.util;
+
+import org.projectfloodlight.openflow.util.HexString;
+
+/**
+ * The class representing a network switch DPID.
+ * This class is immutable.
+ */
+public final class Dpid {
+    private static final long UNKNOWN = 0;
+    private final long value;
+
+    /**
+     * Default constructor.
+     */
+    public Dpid() {
+        this.value = Dpid.UNKNOWN;
+    }
+
+    /**
+     * Constructor from a long value.
+     *
+     * @param value the value to use.
+     */
+    public Dpid(long value) {
+        this.value = value;
+    }
+
+    /**
+     * Constructor from a string.
+     *
+     * @param value the value to use.
+     */
+    public Dpid(String value) {
+        this.value = HexString.toLong(value);
+    }
+
+    /**
+     * Get the value of the DPID.
+     *
+     * @return the value of the DPID.
+     */
+    public long value() {
+        return value;
+    }
+
+    /**
+     * Convert the DPID value to a ':' separated hexadecimal string.
+     *
+     * @return the DPID value as a ':' separated hexadecimal string.
+     */
+    @Override
+    public String toString() {
+        return HexString.toHexString(this.value);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof Dpid)) {
+            return false;
+        }
+
+        Dpid otherDpid = (Dpid) other;
+
+        return value == otherDpid.value;
+    }
+
+    @Override
+    public int hashCode() {
+        int hash = 17;
+        hash += 31 * hash + (int) (value ^ value >>> 32);
+        return hash;
+    }
+}