diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/OsgiPropertyConstants.java b/web/gui/src/main/java/org/onosproject/ui/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..9a03f1f
--- /dev/null
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/OsgiPropertyConstants.java
@@ -0,0 +1,25 @@
+/*
+ * 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.
+ */
+
+package org.onosproject.ui.impl;
+
+public final class OsgiPropertyConstants {
+    private OsgiPropertyConstants() {
+    }
+
+    public static final String TRAFFIC_REFRESH_MS = "trafficRefreshMs";
+    public static final int TRAFFIC_REFRESH_MS_DEFAULT = 5000;
+}