diff --git a/agent/device/sim/vendor.h b/agent/device/sim/vendor.h
new file mode 100644
index 0000000..3cecd88
--- /dev/null
+++ b/agent/device/sim/vendor.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __VENDOR_H__
+#define __VENDOR_H__
+#define VENDOR_ID "ONF"
+#define SIM
+#define MODEL_ID  "sim"
+#define MAX_SUPPORTED_PON 16
+#define ONU_BIT_TRANSMISSION_DELAY 0.1004823/1000 /* unit: ns to us */
+#define MINIMUM_ONU_RESPONSE_RANGING_TIME 1572135 /* hardcore: this is ranging time for the shortest distance, typically 35us */
+
+// DeviceInfo definitions
+
+#define ONU_ID_START 1
+#define ONU_ID_END 32
+#define MAX_ONUS_PER_PON (ONU_ID_END - ONU_ID_START + 1)
+
+#define MAX_ALLOC_ID_PER_ONU 4
+#define ALLOC_ID_START 1024
+#define ALLOC_ID_END (ALLOC_ID_START + MAX_ONUS_PER_PON * MAX_ALLOC_ID_PER_ONU)
+
+#define GEM_PORT_ID_PER_ALLOC_ID 8
+#define GEM_PORT_ID_START 1024
+#define GEM_PORT_ID_END (GEM_PORT_ID_START + MAX_ONUS_PER_PON * MAX_ALLOC_ID_PER_ONU * GEM_PORT_ID_PER_ALLOC_ID)
+
+#define FLOW_ID_START 1
+#define FLOW_ID_END 65535
+#define MAX_FLOW_ID FLOW_ID_END
+#define INVALID_FLOW_ID 0
+
+#endif