diff --git a/net/api/src/main/java/org/onlab/onos/net/topology/DefaultTopologyCluster.java b/net/api/src/main/java/org/onlab/onos/net/topology/DefaultTopologyCluster.java
new file mode 100644
index 0000000..f33dcf7
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/topology/DefaultTopologyCluster.java
@@ -0,0 +1,81 @@
+package org.onlab.onos.net.topology;
+
+import org.onlab.onos.net.DeviceId;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Default implementation of a network topology cluster.
+ */
+public class DefaultTopologyCluster implements TopologyCluster {
+
+    private final ClusterId id;
+    private final int deviceCount;
+    private final int linkCount;
+    private final DeviceId root;
+
+    /**
+     * Creates a new topology cluster descriptor with the specified attributes.
+     *
+     * @param id          cluster id
+     * @param deviceCount number of devices in the cluster
+     * @param linkCount   number of links in the cluster
+     * @param root        cluster root node
+     */
+    public DefaultTopologyCluster(ClusterId id, int deviceCount, int linkCount,
+                                  DeviceId root) {
+        this.id = id;
+        this.deviceCount = deviceCount;
+        this.linkCount = linkCount;
+        this.root = root;
+    }
+
+    @Override
+    public ClusterId id() {
+        return id;
+    }
+
+    @Override
+    public int deviceCount() {
+        return deviceCount;
+    }
+
+    @Override
+    public int linkCount() {
+        return linkCount;
+    }
+
+    @Override
+    public DeviceId root() {
+        return root;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, deviceCount, linkCount, root);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof DefaultTopologyCluster) {
+            final DefaultTopologyCluster other = (DefaultTopologyCluster) obj;
+            return Objects.equals(this.id, other.id) &&
+                    Objects.equals(this.deviceCount, other.deviceCount) &&
+                    Objects.equals(this.linkCount, other.linkCount) &&
+                    Objects.equals(this.root, other.root);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("id", id)
+                .add("deviceCount", deviceCount)
+                .add("linkCount", linkCount)
+                .add("root", root)
+                .toString();
+    }
+}