diff --git a/core/net/src/test/java/org/onlab/onos/core/impl/DummyIdBlockAllocator.java b/core/net/src/test/java/org/onlab/onos/core/impl/DummyIdBlockAllocator.java
new file mode 100644
index 0000000..d4c0e64
--- /dev/null
+++ b/core/net/src/test/java/org/onlab/onos/core/impl/DummyIdBlockAllocator.java
@@ -0,0 +1,33 @@
+package org.onlab.onos.core.impl;
+
+import org.onlab.onos.core.IdBlock;
+
+public class DummyIdBlockAllocator implements IdBlockAllocator {
+    private long blockTop;
+    private static final long BLOCK_SIZE = 0x1000000L;
+
+    /**
+     * Returns a block of IDs which are unique and unused.
+     * Range of IDs is fixed size and is assigned incrementally as this method
+     * called.
+     *
+     * @return an IdBlock containing a set of unique IDs
+     */
+    @Override
+    public IdBlock allocateUniqueIdBlock() {
+        synchronized (this)  {
+            long blockHead = blockTop;
+            long blockTail = blockTop + BLOCK_SIZE;
+
+            IdBlock block = new IdBlock(blockHead, BLOCK_SIZE);
+            blockTop = blockTail;
+
+            return block;
+        }
+    }
+
+    @Override
+    public IdBlock allocateUniqueIdBlock(long range) {
+        throw new UnsupportedOperationException("Not supported yet");
+    }
+}