diff --git a/providers/tl1/device/src/main/java/org/onosproject/provider/tl1/device/impl/Tl1DeviceProvider.java b/providers/tl1/device/src/main/java/org/onosproject/provider/tl1/device/impl/Tl1DeviceProvider.java
new file mode 100644
index 0000000..7e98496
--- /dev/null
+++ b/providers/tl1/device/src/main/java/org/onosproject/provider/tl1/device/impl/Tl1DeviceProvider.java
@@ -0,0 +1,291 @@
+/*
+ * Copyright 2016-present 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.provider.tl1.device.impl;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onlab.packet.ChassisId;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreService;
+import org.onosproject.incubator.net.config.basics.ConfigException;
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.DefaultAnnotations;
+import org.onosproject.net.Device;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.MastershipRole;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.SparseAnnotations;
+import org.onosproject.net.config.ConfigFactory;
+import org.onosproject.net.config.NetworkConfigEvent;
+import org.onosproject.net.config.NetworkConfigListener;
+import org.onosproject.net.config.NetworkConfigRegistry;
+import org.onosproject.net.device.DefaultDeviceDescription;
+import org.onosproject.net.device.DeviceAdminService;
+import org.onosproject.net.device.DeviceDescription;
+import org.onosproject.net.device.DeviceDescriptionDiscovery;
+import org.onosproject.net.device.DeviceProvider;
+import org.onosproject.net.device.DeviceProviderRegistry;
+import org.onosproject.net.device.DeviceProviderService;
+import org.onosproject.net.device.DeviceService;
+import org.onosproject.net.provider.AbstractProvider;
+import org.onosproject.net.provider.ProviderId;
+import org.onosproject.tl1.Tl1Controller;
+import org.onosproject.tl1.Tl1Device;
+import org.onosproject.tl1.Tl1Listener;
+import org.slf4j.Logger;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.Socket;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.NoSuchElementException;
+
+import static org.onosproject.net.config.basics.SubjectFactories.APP_SUBJECT_FACTORY;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Device provider for TL1 devices.
+ *
+ * Sits between ONOS provider service and the TL1 controller.
+ * Relies on network config subsystem to know about devices.
+ */
+@Component(immediate = true)
+public class Tl1DeviceProvider extends AbstractProvider implements DeviceProvider {
+    private static final String APP_NAME = "org.onosproject.tl1";
+    private static final String TL1 = "tl1";
+    private static final String PROVIDER = "org.onosproject.provider.tl1.device";
+    private static final String UNKNOWN = "unknown";
+    private static final int REACHABILITY_TIMEOUT = 2000;      // in milliseconds
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected NetworkConfigRegistry cfgRegistry;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CoreService coreService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DeviceProviderRegistry providerRegistry;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DeviceAdminService deviceAdminService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DeviceService deviceService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected Tl1Controller controller;
+
+    private ApplicationId appId;
+    private NetworkConfigListener cfgListener = new InnerConfigListener();
+    private Tl1Listener tl1Listener = new InnerTl1Listener();
+    private DeviceProviderService providerService;
+
+    private final ConfigFactory cfgFactory =
+            new ConfigFactory<ApplicationId, Tl1ProviderConfig>(APP_SUBJECT_FACTORY,
+                    Tl1ProviderConfig.class,
+                    "devices",
+                    true) {
+                @Override
+                public Tl1ProviderConfig createConfig() {
+                    return new Tl1ProviderConfig();
+                }
+            };
+
+    @Activate
+    public void activate() {
+        appId = coreService.registerApplication(APP_NAME);
+        providerService = providerRegistry.register(this);
+        cfgRegistry.addListener(cfgListener);
+        controller.addListener(tl1Listener);
+        cfgRegistry.registerConfigFactory(cfgFactory);
+        registerDevices();
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        controller.removeListener(tl1Listener);
+        cfgRegistry.removeListener(cfgListener);
+        controller.getDeviceIds().forEach(deviceId -> {
+            controller.removeDevice(deviceId);
+            deviceAdminService.removeDevice(deviceId);
+        });
+        providerRegistry.unregister(this);
+        cfgRegistry.unregisterConfigFactory(cfgFactory);
+        providerService = null;
+        log.info("Stopped");
+    }
+
+    public Tl1DeviceProvider() {
+        super(new ProviderId(TL1, PROVIDER));
+    }
+
+    public void triggerProbe(DeviceId deviceId) {
+        // TODO
+    }
+
+    public void roleChanged(DeviceId deviceId, MastershipRole newRole) {
+        switch (newRole) {
+            case MASTER:
+                controller.connectDevice(deviceId);
+                providerService.receivedRoleReply(deviceId, newRole, MastershipRole.MASTER);
+                log.debug("Accepting mastership role change to {} for device {}", newRole, deviceId);
+                break;
+            case STANDBY:
+                controller.disconnectDevice(deviceId);
+                providerService.receivedRoleReply(deviceId, newRole, MastershipRole.STANDBY);
+                break;
+            case NONE:
+                controller.disconnectDevice(deviceId);
+                providerService.receivedRoleReply(deviceId, newRole, MastershipRole.NONE);
+                break;
+            default:
+                log.error("Invalid mastership state: {}", newRole);
+        }
+    }
+
+    // Assumes device is registered in TL1 controller.
+    public boolean isReachable(DeviceId deviceId) {
+        try {
+            // First check if device is already connected.
+            // If not, try to open a socket.
+            Tl1Device device = controller.getDevice(deviceId).get();
+            if (device.isConnected()) {
+                return true;
+            }
+
+            Socket socket = new Socket();
+            socket.connect(new InetSocketAddress(device.ip().toInetAddress(), device.port()), REACHABILITY_TIMEOUT);
+            socket.close();
+            return true;
+        } catch (NoSuchElementException | IOException | IllegalArgumentException e) {
+            log.error("Cannot reach device {}", deviceId, e);
+            return false;
+        }
+    }
+
+    public void changePortState(DeviceId deviceId, PortNumber portNumber, boolean enable) {
+        // TODO
+    }
+
+    // Register all devices in the core and in the TL1 controller
+    void registerDevices() {
+        Tl1ProviderConfig cfg = cfgRegistry.getConfig(appId, Tl1ProviderConfig.class);
+
+        if (cfg == null) {
+            return;
+        }
+
+        try {
+            cfg.readDevices().forEach(device -> {
+                try {
+                    // Add device to TL1 controller
+                    DeviceId deviceId = DeviceId.deviceId(
+                            new URI(TL1, device.ip() + ":" + device.port(), null));
+
+                    if (controller.addDevice(deviceId, device)) {
+                        SparseAnnotations ann = DefaultAnnotations.builder()
+                                .set(AnnotationKeys.PROTOCOL, TL1.toUpperCase())
+                                .build();
+                        // Register device in the core with default parameters and mark it as unavailable
+                        DeviceDescription dd = new DefaultDeviceDescription(deviceId.uri(), Device.Type.SWITCH, UNKNOWN,
+                                UNKNOWN, UNKNOWN, UNKNOWN, new ChassisId(), false, ann);
+                        providerService.deviceConnected(deviceId, dd);
+                    }
+                } catch (URISyntaxException e) {
+                    log.error("Skipping device {}", device, e);
+                }
+            });
+        } catch (ConfigException e) {
+            log.error("Cannot parse network configuration", e);
+        }
+    }
+
+    /**
+     * Tries to update the device and port descriptions through the {@code DeviceDescriptionDiscovery} behaviour.
+     *
+     * @param deviceId the device
+     */
+    void updateDevice(DeviceId deviceId) {
+        Device device = deviceService.getDevice(deviceId);
+
+        if (!device.is(DeviceDescriptionDiscovery.class)) {
+            return;
+        }
+
+        try {
+            // Update device description
+            DeviceDescriptionDiscovery discovery = device.as(DeviceDescriptionDiscovery.class);
+            DeviceDescription dd = discovery.discoverDeviceDetails();
+            if (dd == null) {
+                return;
+            }
+            providerService.deviceConnected(deviceId,
+                    new DefaultDeviceDescription(dd, true, dd.annotations()));
+            // Update ports
+            providerService.updatePorts(deviceId, discovery.discoverPortDetails());
+        } catch (IllegalStateException | IllegalArgumentException e) {
+            log.error("Cannot update device description {}", deviceId, e);
+        }
+    }
+
+    /**
+     * Listener for network configuration events.
+     */
+    private class InnerConfigListener implements NetworkConfigListener {
+        public void event(NetworkConfigEvent event) {
+            if (event.type() == NetworkConfigEvent.Type.CONFIG_ADDED) {
+                registerDevices();
+            } else if (event.type() == NetworkConfigEvent.Type.CONFIG_UPDATED) {
+                // TODO: calculate delta
+                registerDevices();
+            } else if (event.type() == NetworkConfigEvent.Type.CONFIG_REMOVED) {
+                controller.getDeviceIds().forEach(deviceId -> {
+                    controller.removeDevice(deviceId);
+                    deviceAdminService.removeDevice(deviceId);
+                });
+            }
+        }
+
+        public boolean isRelevant(NetworkConfigEvent event) {
+            return event.configClass().equals(Tl1ProviderConfig.class) &&
+                    (event.type() == NetworkConfigEvent.Type.CONFIG_ADDED ||
+                            event.type() == NetworkConfigEvent.Type.CONFIG_UPDATED ||
+                            event.type() == NetworkConfigEvent.Type.CONFIG_REMOVED);
+        }
+    }
+
+    /**
+     * Listener for TL1 events.
+     */
+    private class InnerTl1Listener implements Tl1Listener {
+        @Override
+        public void deviceConnected(DeviceId deviceId) {
+            updateDevice(deviceId);
+        }
+
+        @Override
+        public void deviceDisconnected(DeviceId deviceId) {
+            providerService.deviceDisconnected(deviceId);
+        }
+    }
+}