diff --git a/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscoveryService.java b/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscoveryService.java
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+++ b/src/main/java/net/onrc/onos/ofcontroller/linkdiscovery/ILinkDiscoveryService.java
@@ -0,0 +1,84 @@
+/**
+*    Copyright 2011, Big Switch Networks, Inc. 
+*    Originally created by David Erickson, Stanford University
+* 
+*    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 net.onrc.onos.ofcontroller.linkdiscovery;
+
+import java.util.Map;
+import java.util.Set;
+
+import net.floodlightcontroller.core.module.IFloodlightService;
+import net.floodlightcontroller.routing.Link;
+import net.floodlightcontroller.topology.NodePortTuple;
+
+
+public interface ILinkDiscoveryService extends IFloodlightService {
+    /**
+     * Retrieves a map of all known link connections between OpenFlow switches
+     * and the associated info (valid time, port states) for the link.
+     */
+    public Map<Link, LinkInfo> getLinks();
+
+    /**
+     * Returns link type of a given link
+     * @param info
+     * @return
+     */
+    public ILinkDiscovery.LinkType getLinkType(Link lt, LinkInfo info);
+
+    /**
+     * Returns an unmodifiable map from switch id to a set of all links with it 
+     * as an endpoint.
+     */
+    public Map<Long, Set<Link>> getSwitchLinks();
+
+    /**
+     * Adds a listener to listen for ILinkDiscoveryService messages
+     * @param listener The listener that wants the notifications
+     */
+    public void addListener(ILinkDiscoveryListener listener);
+
+    /**
+     * Retrieves a set of all switch ports on which lldps are suppressed.
+     */
+    public Set<NodePortTuple> getSuppressLLDPsInfo();
+
+    /**
+     * Adds a switch port to suppress lldp set
+     */
+    public void AddToSuppressLLDPs(long sw, short port);
+
+    /**
+     * Removes a switch port from suppress lldp set
+     */
+    public void RemoveFromSuppressLLDPs(long sw, short port);
+
+    /**
+     * Get the set of quarantined ports on a switch
+     */
+    public Set<Short> getQuarantinedPorts(long sw);
+
+    /**
+     * Get the status of auto port fast feature.
+     */
+    public boolean isAutoPortFastFeature();
+
+    /**
+     * Set the state for auto port fast feature.
+     * @param autoPortFastFeature
+     */
+    public void setAutoPortFastFeature(boolean autoPortFastFeature);
+}