diff --git a/web/gui2/src/main/webapp/app/fw/svg/icon/tooltip.css b/web/gui2/src/main/webapp/app/fw/svg/icon/tooltip.css
new file mode 100644
index 0000000..74a5443
--- /dev/null
+++ b/web/gui2/src/main/webapp/app/fw/svg/icon/tooltip.css
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2015-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.
+ */
+
+/*
+ ONOS GUI -- Tooltip Service (layout) -- CSS file
+ */
+
+#tooltip {
+    text-align: center;
+    font-size: 80%;
+    border: 1px solid;
+    padding: 5px;
+    position: absolute;
+    z-index: 5000;
+    display: none;
+    pointer-events: none;
+}