diff --git a/cli/src/main/java/org/onlab/onos/cli/net/Comparators.java b/cli/src/main/java/org/onlab/onos/cli/net/Comparators.java
new file mode 100644
index 0000000..3bb1e4d
--- /dev/null
+++ b/cli/src/main/java/org/onlab/onos/cli/net/Comparators.java
@@ -0,0 +1,64 @@
+package org.onlab.onos.cli.net;
+
+import org.onlab.onos.cluster.ControllerNode;
+import org.onlab.onos.net.Element;
+import org.onlab.onos.net.ElementId;
+import org.onlab.onos.net.Port;
+import org.onlab.onos.net.flow.FlowRule;
+import org.onlab.onos.net.topology.TopologyCluster;
+
+import java.util.Comparator;
+
+/**
+ * Various comparators.
+ */
+public final class Comparators {
+
+    // Ban construction
+    private Comparators() {
+    }
+
+    public static final Comparator<ElementId> ELEMENT_ID_COMPARATOR = new Comparator<ElementId>() {
+        @Override
+        public int compare(ElementId id1, ElementId id2) {
+            return id1.uri().toString().compareTo(id2.uri().toString());
+        }
+    };
+
+    public static final Comparator<Element> ELEMENT_COMPARATOR = new Comparator<Element>() {
+        @Override
+        public int compare(Element e1, Element e2) {
+            return e1.id().uri().toString().compareTo(e2.id().uri().toString());
+        }
+    };
+
+    public static final Comparator<FlowRule> FLOW_RULE_COMPARATOR = new Comparator<FlowRule>() {
+        @Override
+        public int compare(FlowRule f1, FlowRule f2) {
+            return Long.valueOf(f1.id().value()).compareTo(f2.id().value());
+        }
+    };
+
+    public static final Comparator<Port> PORT_COMPARATOR = new Comparator<Port>() {
+        @Override
+        public int compare(Port p1, Port p2) {
+            long delta = p1.number().toLong() - p2.number().toLong();
+            return delta == 0 ? 0 : (delta < 0 ? -1 : +1);
+        }
+    };
+
+    public static final Comparator<TopologyCluster> CLUSTER_COMPARATOR = new Comparator<TopologyCluster>() {
+        @Override
+        public int compare(TopologyCluster c1, TopologyCluster c2) {
+            return c1.id().index() - c2.id().index();
+        }
+    };
+
+    public static final Comparator<ControllerNode> NODE_COMPARATOR = new Comparator<ControllerNode>() {
+        @Override
+        public int compare(ControllerNode ci1, ControllerNode ci2) {
+            return ci1.id().toString().compareTo(ci2.id().toString());
+        }
+    };
+
+}