Cleaned-up CLI commands.
diff --git a/cli/src/main/java/org/onlab/onos/cli/NodeIdCompleter.java b/cli/src/main/java/org/onlab/onos/cli/NodeIdCompleter.java
new file mode 100644
index 0000000..c47189e
--- /dev/null
+++ b/cli/src/main/java/org/onlab/onos/cli/NodeIdCompleter.java
@@ -0,0 +1,33 @@
+package org.onlab.onos.cli;
+
+import org.apache.karaf.shell.console.Completer;
+import org.apache.karaf.shell.console.completer.StringsCompleter;
+import org.onlab.onos.cluster.ClusterService;
+import org.onlab.onos.cluster.ControllerNode;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.SortedSet;
+
+/**
+ * Node ID completer.
+ */
+public class NodeIdCompleter implements Completer {
+    @Override
+    public int complete(String buffer, int cursor, List<String> candidates) {
+        // Delegate string completer
+        StringsCompleter delegate = new StringsCompleter();
+
+        // Fetch our service and feed it's offerings to the string completer
+        ClusterService service = AbstractShellCommand.get(ClusterService.class);
+        Iterator<ControllerNode> it = service.getNodes().iterator();
+        SortedSet<String> strings = delegate.getStrings();
+        while (it.hasNext()) {
+            strings.add(it.next().id().toString());
+        }
+
+        // Now let the completer do the work for figuring out what to offer.
+        return delegate.complete(buffer, cursor, candidates);
+    }
+
+}