diff --git a/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/device/InterfaceDescription.java b/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/device/InterfaceDescription.java
new file mode 100644
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--- /dev/null
+++ b/apps/iptopology-api/src/main/java/org/onosproject/iptopology/api/device/InterfaceDescription.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2014 Open Networking Laboratory
+ *
+ * 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.iptopology.api.device;
+
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.Ip6Address;
+import org.onosproject.iptopology.api.InterfaceIdentifier;
+import org.onosproject.net.Description;
+
+
+/**
+ * Information about an interface.
+ */
+public interface InterfaceDescription extends Description {
+
+    /**
+     * Returns the IPv4 Address of an interface.
+     *
+     * @return ipv4 address
+     */
+    Ip4Address ipv4Address();
+
+    /**
+     * Returns the IPv6 Address of an interface.
+     *
+     * @return ipv6 address
+     */
+    Ip6Address ipv6Address();
+
+
+    /**
+     * Returns the interface id of the interface.
+     *
+     * @return interface identifier
+     */
+    InterfaceIdentifier intfId();
+
+}