diff --git a/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/GeneralDeviceProvider.java b/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/GeneralDeviceProvider.java
index 9918327..6e8fe1d 100644
--- a/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/GeneralDeviceProvider.java
+++ b/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/GeneralDeviceProvider.java
@@ -106,6 +106,9 @@
 import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor;
 import static org.onlab.util.Tools.groupedThreads;
 import static org.onosproject.net.device.DeviceEvent.Type;
+import static org.onosproject.provider.general.device.impl.OsgiPropertyDefaults.OP_TIMEOUT_SHORT_DEFAULT;
+import static org.onosproject.provider.general.device.impl.OsgiPropertyDefaults.PROBE_FREQUENCY_DEFAULT;
+import static org.onosproject.provider.general.device.impl.OsgiPropertyDefaults.STATS_POLL_FREQUENCY_DEFAULT;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
@@ -114,7 +117,12 @@
  * also delegated to the DeviceHandshaker driver.
  */
 @Beta
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+            "deviceStatsPollFrequency:Integer=" + STATS_POLL_FREQUENCY_DEFAULT,
+            "deviceProbeFrequency:Integer=" + PROBE_FREQUENCY_DEFAULT,
+            "deviceOperationTimeoutShort:Integer=" + OP_TIMEOUT_SHORT_DEFAULT,
+        })
 public class GeneralDeviceProvider extends AbstractProvider
         implements DeviceProvider {
 
@@ -159,26 +167,23 @@
     private PiPipeconfWatchdogService pipeconfWatchdogService;
 
     private static final String STATS_POLL_FREQUENCY = "deviceStatsPollFrequency";
-    private static final int DEFAULT_STATS_POLL_FREQUENCY = 10;
     //@Property(name = STATS_POLL_FREQUENCY, intValue = DEFAULT_STATS_POLL_FREQUENCY,
     //        label = "Configure poll frequency for port status and statistics; " +
     //                "default is 10 sec")
-    private int statsPollFrequency = DEFAULT_STATS_POLL_FREQUENCY;
+    private int statsPollFrequency = STATS_POLL_FREQUENCY_DEFAULT;
 
     private static final String PROBE_FREQUENCY = "deviceProbeFrequency";
-    private static final int DEFAULT_PROBE_FREQUENCY = 10;
     //@Property(name = PROBE_FREQUENCY, intValue = DEFAULT_PROBE_FREQUENCY,
     //        label = "Configure probe frequency for checking device availability; " +
     //                "default is 10 sec")
-    private int probeFrequency = DEFAULT_PROBE_FREQUENCY;
+    private int probeFrequency = PROBE_FREQUENCY_DEFAULT;
 
     private static final String OP_TIMEOUT_SHORT = "deviceOperationTimeoutShort";
-    private static final int DEFAULT_OP_TIMEOUT_SHORT = 10;
     //@Property(name = OP_TIMEOUT_SHORT, intValue = DEFAULT_OP_TIMEOUT_SHORT,
     //        label = "Configure timeout in seconds for device operations " +
     //                "that are supposed to take a short time " +
     //                "(e.g. checking device reachability); default is 10 seconds")
-    private int opTimeoutShort = DEFAULT_OP_TIMEOUT_SHORT;
+    private int opTimeoutShort = OP_TIMEOUT_SHORT_DEFAULT;
 
     //FIXME to be removed when netcfg will issue device events in a bundle or
     //ensures all configuration needed is present
@@ -235,16 +240,16 @@
         Dictionary<?, ?> properties = context.getProperties();
         final int oldStatsPollFrequency = statsPollFrequency;
         statsPollFrequency = Tools.getIntegerProperty(
-                properties, STATS_POLL_FREQUENCY, DEFAULT_STATS_POLL_FREQUENCY);
+                properties, STATS_POLL_FREQUENCY, STATS_POLL_FREQUENCY_DEFAULT);
         log.info("Configured. {} is configured to {} seconds",
                  STATS_POLL_FREQUENCY, statsPollFrequency);
         final int oldProbeFrequency = probeFrequency;
         probeFrequency = Tools.getIntegerProperty(
-                properties, PROBE_FREQUENCY, DEFAULT_PROBE_FREQUENCY);
+                properties, PROBE_FREQUENCY, PROBE_FREQUENCY_DEFAULT);
         log.info("Configured. {} is configured to {} seconds",
                  PROBE_FREQUENCY, probeFrequency);
         opTimeoutShort = Tools.getIntegerProperty(
-                properties, OP_TIMEOUT_SHORT, DEFAULT_OP_TIMEOUT_SHORT);
+                properties, OP_TIMEOUT_SHORT, OP_TIMEOUT_SHORT_DEFAULT);
         log.info("Configured. {} is configured to {} seconds",
                  OP_TIMEOUT_SHORT, opTimeoutShort);
 
diff --git a/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/OsgiPropertyDefaults.java b/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/OsgiPropertyDefaults.java
new file mode 100644
index 0000000..90cf437
--- /dev/null
+++ b/providers/general/device/src/main/java/org/onosproject/provider/general/device/impl/OsgiPropertyDefaults.java
@@ -0,0 +1,30 @@
+/*
+ * 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.provider.general.device.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyDefaults {
+
+    private OsgiPropertyDefaults() {}
+
+    public static final int STATS_POLL_FREQUENCY_DEFAULT = 10;
+    public static final int PROBE_FREQUENCY_DEFAULT = 10;
+    public static final int OP_TIMEOUT_SHORT_DEFAULT = 10;
+
+}
diff --git a/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java b/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java
index 434cefc..b804c6d 100644
--- a/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java
+++ b/providers/host/src/main/java/org/onosproject/provider/host/impl/HostLocationProvider.java
@@ -109,7 +109,16 @@
  * Provider which uses an OpenFlow controller to detect network end-station
  * hosts.
  */
-@Component(immediate = true, service = HostProvider.class)
+@Component(immediate = true, service = HostProvider.class,
+        property = {
+                "hostRemovalEnabled:Boolean=true",
+                "requestArp:Boolean=true",
+                "requestIpv6ND:Boolean=false",
+                "useDhcp:Boolean=false",
+                "useDhcp6:Boolean=false",
+                "requestInterceptsEnabled:Boolean=true",
+                "multihomingEnabled:Boolean=false",
+        })
 public class HostLocationProvider extends AbstractProvider implements HostProvider {
     private final Logger log = getLogger(getClass());
 
diff --git a/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/LinkDiscoveryProvider.java b/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/LinkDiscoveryProvider.java
index 1415290..44dd60d 100644
--- a/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/LinkDiscoveryProvider.java
+++ b/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/LinkDiscoveryProvider.java
@@ -58,13 +58,19 @@
 import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.onlab.util.Tools.get;
 import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.provider.linkdiscovery.impl.OsgiPropertyDefaults.POLL_DELAY_SECONDS_DEFAULT;
+import static org.onosproject.provider.linkdiscovery.impl.OsgiPropertyDefaults.POLL_FREQUENCY_SECONDS_DEFAULT;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Link provider capable of polling the environment using the device driver
  * {@link LinkDiscovery} behaviour.
  */
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+                "linkPollDelaySeconds:Integer=" + POLL_DELAY_SECONDS_DEFAULT,
+                "linkPollFrequencySeconds:Integer=" + POLL_FREQUENCY_SECONDS_DEFAULT,
+        })
 public class LinkDiscoveryProvider extends AbstractProvider
         implements LinkProvider {
 
@@ -72,14 +78,13 @@
     protected static final String SCHEME_NAME = "linkdiscovery";
     private static final String LINK_PROVIDER_PACKAGE = "org.onosproject.provider.linkdiscovery";
     private final Logger log = getLogger(getClass());
-    private static final int DEFAULT_POLL_DELAY_SECONDS = 20;
     //@Property(name = "linkPollDelaySeconds", intValue = DEFAULT_POLL_DELAY_SECONDS,
     //        label = "Initial delay (in seconds) for polling link discovery")
-    protected static int linkPollDelaySeconds = DEFAULT_POLL_DELAY_SECONDS;
-    private static final int DEFAULT_POLL_FREQUENCY_SECONDS = 10;
+    protected static int linkPollDelaySeconds = POLL_DELAY_SECONDS_DEFAULT;
+
     //@Property(name = "linkPollFrequencySeconds", intValue = DEFAULT_POLL_FREQUENCY_SECONDS,
     //        label = "Frequency (in seconds) for polling link discovery")
-    protected static int linkPollFrequencySeconds = DEFAULT_POLL_FREQUENCY_SECONDS;
+    protected static int linkPollFrequencySeconds = POLL_FREQUENCY_SECONDS_DEFAULT;
 
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
@@ -118,7 +123,7 @@
         cfgService.registerProperties(getClass());
 
         if (context == null) {
-            linkPollFrequencySeconds = DEFAULT_POLL_FREQUENCY_SECONDS;
+            linkPollFrequencySeconds = POLL_FREQUENCY_SECONDS_DEFAULT;
             log.info("No component configuration");
         } else {
             Dictionary<?, ?> properties = context.getProperties();
@@ -169,7 +174,7 @@
             String s = get(properties, "linkPollFrequencySeconds");
             newPollFrequency = isNullOrEmpty(s) ? pollFrequency : Integer.parseInt(s.trim());
         } catch (NumberFormatException | ClassCastException e) {
-            newPollFrequency = DEFAULT_POLL_FREQUENCY_SECONDS;
+            newPollFrequency = POLL_FREQUENCY_SECONDS_DEFAULT;
         }
         return newPollFrequency;
     }
@@ -180,7 +185,7 @@
             String s = get(properties, "linkPollDelaySeconds");
             newPollFrequency = isNullOrEmpty(s) ? pollDelay : Integer.parseInt(s.trim());
         } catch (NumberFormatException | ClassCastException e) {
-            newPollFrequency = DEFAULT_POLL_DELAY_SECONDS;
+            newPollFrequency = POLL_DELAY_SECONDS_DEFAULT;
         }
         return newPollFrequency;
     }
diff --git a/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/OsgiPropertyDefaults.java b/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/OsgiPropertyDefaults.java
new file mode 100644
index 0000000..ba85b86
--- /dev/null
+++ b/providers/link/src/main/java/org/onosproject/provider/linkdiscovery/impl/OsgiPropertyDefaults.java
@@ -0,0 +1,29 @@
+/*
+ * 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.provider.linkdiscovery.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyDefaults {
+
+    private OsgiPropertyDefaults() {}
+
+    public static final int POLL_DELAY_SECONDS_DEFAULT = 20;
+    public static final int POLL_FREQUENCY_SECONDS_DEFAULT = 10;
+
+}
diff --git a/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/LldpLinkProvider.java b/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/LldpLinkProvider.java
index e425678..e2e3fbe 100644
--- a/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/LldpLinkProvider.java
+++ b/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/LldpLinkProvider.java
@@ -87,12 +87,19 @@
 import static org.onosproject.net.config.basics.SubjectFactories.APP_SUBJECT_FACTORY;
 import static org.onosproject.net.config.basics.SubjectFactories.CONNECT_POINT_SUBJECT_FACTORY;
 import static org.onosproject.net.config.basics.SubjectFactories.DEVICE_SUBJECT_FACTORY;
+import static org.onosproject.provider.lldp.impl.OsgiPropertyConstants.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider which uses LLDP and BDDP packets to detect network infrastructure links.
  */
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+                PROP_ENABLED + ":Boolean=" + ENABLED_DEFAULT,
+                PROP_USE_BDDP + ":Boolean=" + USE_BDDP_DEFAULT,
+                PROP_PROBE_RATE + ":Integer=" + PROBE_RATE_DEFAULT,
+                PROP_STALE_LINK_AGE + ":Integer=" + STALE_LINK_AGE_DEFAULT,
+        })
 public class LldpLinkProvider extends AbstractProvider implements ProbedLinkProvider {
 
     private static final String PROVIDER_NAME = "org.onosproject.provider.lldp";
@@ -104,9 +111,6 @@
     // When a Device/Port has this annotation, do not send out LLDP/BDDP
     public static final String NO_LLDP = "no-lldp";
 
-    private static final int MAX_RETRIES = 5;
-    private static final int RETRY_DELAY = 1_000; // millis
-
     private final Logger log = getLogger(getClass());
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
@@ -150,27 +154,21 @@
     private static final long DEVICE_SYNC_DELAY = 5;
     private static final long LINK_PRUNER_DELAY = 3;
 
-    private static final String PROP_ENABLED = "enabled";
     //@Property(name = PROP_ENABLED, boolValue = true,
     //        label = "If false, link discovery is disabled")
-    private boolean enabled = false;
+    private boolean enabled = ENABLED_DEFAULT;
 
-    private static final String PROP_USE_BDDP = "useBDDP";
     //@Property(name = PROP_USE_BDDP, boolValue = true,
     //        label = "Use BDDP for link discovery")
-    private boolean useBddp = true;
+    private boolean useBddp = USE_BDDP_DEFAULT;
 
-    private static final String PROP_PROBE_RATE = "probeRate";
-    private static final int DEFAULT_PROBE_RATE = 3000;
     //@Property(name = PROP_PROBE_RATE, intValue = DEFAULT_PROBE_RATE,
     //        label = "LLDP and BDDP probe rate specified in millis")
-    private int probeRate = DEFAULT_PROBE_RATE;
+    private int probeRate = PROBE_RATE_DEFAULT;
 
-    private static final String PROP_STALE_LINK_AGE = "staleLinkAge";
-    private static final int DEFAULT_STALE_LINK_AGE = 10000;
     //@Property(name = PROP_STALE_LINK_AGE, intValue = DEFAULT_STALE_LINK_AGE,
     //        label = "Number of millis beyond which links will be considered stale")
-    private int staleLinkAge = DEFAULT_STALE_LINK_AGE;
+    private int staleLinkAge = STALE_LINK_AGE_DEFAULT;
 
     private final LinkDiscoveryContext context = new InternalDiscoveryContext();
     private final InternalRoleListener roleListener = new InternalRoleListener();
diff --git a/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/OsgiPropertyConstants.java b/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..ab20c03
--- /dev/null
+++ b/providers/lldp/src/main/java/org/onosproject/provider/lldp/impl/OsgiPropertyConstants.java
@@ -0,0 +1,38 @@
+/*
+ * 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.provider.lldp.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String PROP_ENABLED = "enabled";
+    public static final boolean ENABLED_DEFAULT = false;
+
+    public static final String PROP_USE_BDDP = "useBDDP";
+    public static final boolean USE_BDDP_DEFAULT = true;
+
+    public static final String PROP_PROBE_RATE = "probeRate";
+    public static final int PROBE_RATE_DEFAULT = 3000;
+
+    public static final String PROP_STALE_LINK_AGE = "staleLinkAge";
+    public static final int STALE_LINK_AGE_DEFAULT = 10000;
+
+}
diff --git a/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/NetworkConfigLinksProvider.java b/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/NetworkConfigLinksProvider.java
index 2d44c5b..6092cec 100644
--- a/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/NetworkConfigLinksProvider.java
+++ b/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/NetworkConfigLinksProvider.java
@@ -68,13 +68,18 @@
 import static org.onlab.packet.Ethernet.TYPE_BSN;
 import static org.onlab.packet.Ethernet.TYPE_LLDP;
 import static org.onosproject.net.PortNumber.portNumber;
+import static org.onosproject.provider.netcfglinks.OsgiPropertyConstants.PROP_PROBE_RATE;
+import static org.onosproject.provider.netcfglinks.OsgiPropertyConstants.PROBE_RATE_DEFAULT;
 
 /**
  * Provider to pre-discover links and devices based on a specified network
  * config.
  */
 
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+            PROP_PROBE_RATE + ":Integer=" + PROBE_RATE_DEFAULT,
+        })
 public class NetworkConfigLinksProvider
         extends AbstractProvider
         implements ProbedLinkProvider {
@@ -100,11 +105,9 @@
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ClusterMetadataService metadataService;
 
-    private static final String PROP_PROBE_RATE = "probeRate";
-    private static final int DEFAULT_PROBE_RATE = 3000;
     //@Property(name = PROP_PROBE_RATE, intValue = DEFAULT_PROBE_RATE,
     //        label = "LLDP and BDDP probe rate specified in millis")
-    private int probeRate = DEFAULT_PROBE_RATE;
+    private int probeRate = PROBE_RATE_DEFAULT;
 
     // Device link discovery helpers.
     protected final Map<DeviceId, LinkDiscovery> discoverers = new ConcurrentHashMap<>();
diff --git a/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/OsgiPropertyConstants.java b/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/OsgiPropertyConstants.java
new file mode 100644
index 0000000..c04dedb
--- /dev/null
+++ b/providers/netcfglinks/src/main/java/org/onosproject/provider/netcfglinks/OsgiPropertyConstants.java
@@ -0,0 +1,29 @@
+/*
+ * 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.provider.netcfglinks;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String PROP_PROBE_RATE = "probeRate";
+    public static final int PROBE_RATE_DEFAULT = 3000;
+
+}
diff --git a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
index 9f1a6c4..9987c6e 100644
--- a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
+++ b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/NetconfDeviceProvider.java
@@ -94,12 +94,17 @@
 
 import static java.util.concurrent.Executors.newScheduledThreadPool;
 import static org.onlab.util.Tools.groupedThreads;
+import static org.onosproject.provider.netconf.device.impl.OsgiPropertyConstants.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider which uses an NETCONF controller to detect device.
  */
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+                POLL_FREQUENCY_SECONDS_DEFAULT + ":Integer=" + POLL_FREQUENCY_SECONDS_DEFAULT,
+                MAX_RETRIES + ":Integer=" + MAX_RETRIES_DEFAULT,
+        })
 public class NetconfDeviceProvider extends AbstractProvider
         implements DeviceProvider {
 
@@ -140,17 +145,15 @@
     private static final String PORT = "port";
     private static final int CORE_POOL_SIZE = 10;
 
-    private static final int DEFAULT_POLL_FREQUENCY_SECONDS = 30;
     //@Property(name = "pollFrequency", intValue = DEFAULT_POLL_FREQUENCY_SECONDS,
     //        label = "Configure poll frequency for port status and statistics; " +
     //                "default is 30 sec")
-    private int pollFrequency = DEFAULT_POLL_FREQUENCY_SECONDS;
+    private int pollFrequency = POLL_FREQUENCY_SECONDS_DEFAULT;
 
-    private static final int DEFAULT_MAX_RETRIES = 5;
     //@Property(name = "maxRetries", intValue = DEFAULT_MAX_RETRIES,
     //        label = "Configure maximum allowed number of retries for obtaining list of ports; " +
     //                "default is 5 times")
-    private int maxRetries = DEFAULT_MAX_RETRIES;
+    private int maxRetries = MAX_RETRIES_DEFAULT;
 
     protected ExecutorService executor =
             Executors.newFixedThreadPool(5, groupedThreads("onos/netconfdeviceprovider",
@@ -224,12 +227,11 @@
     public void modified(ComponentContext context) {
         if (context != null) {
             Dictionary<?, ?> properties = context.getProperties();
-            pollFrequency = Tools.getIntegerProperty(properties, "pollFrequency",
-                                                     DEFAULT_POLL_FREQUENCY_SECONDS);
+            pollFrequency = Tools.getIntegerProperty(properties, POLL_FREQUENCY_SECONDS,
+                                                     POLL_FREQUENCY_SECONDS_DEFAULT);
             log.info("Configured. Poll frequency is configured to {} seconds", pollFrequency);
 
-            maxRetries = Tools.getIntegerProperty(properties, "maxRetries",
-                    DEFAULT_MAX_RETRIES);
+            maxRetries = Tools.getIntegerProperty(properties, MAX_RETRIES, MAX_RETRIES_DEFAULT);
             log.info("Configured. Number of retries is configured to {} times", maxRetries);
         }
         if (scheduledTask != null) {
diff --git a/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/OsgiPropertyConstants.java b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..8ededfd
--- /dev/null
+++ b/providers/netconf/device/src/main/java/org/onosproject/provider/netconf/device/impl/OsgiPropertyConstants.java
@@ -0,0 +1,32 @@
+/*
+ * 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.provider.netconf.device.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String POLL_FREQUENCY_SECONDS = "pollFrequency";
+    public static final int POLL_FREQUENCY_SECONDS_DEFAULT = 30;
+
+    public static final String MAX_RETRIES = "maxRetries";
+    public static final int MAX_RETRIES_DEFAULT = 5;
+
+}
diff --git a/providers/null/src/main/java/org/onosproject/provider/nil/NullProviders.java b/providers/null/src/main/java/org/onosproject/provider/nil/NullProviders.java
index 2258f44..1f21244 100644
--- a/providers/null/src/main/java/org/onosproject/provider/nil/NullProviders.java
+++ b/providers/null/src/main/java/org/onosproject/provider/nil/NullProviders.java
@@ -64,13 +64,23 @@
 import static org.onosproject.net.DeviceId.deviceId;
 import static org.onosproject.net.MastershipRole.MASTER;
 import static org.onosproject.net.MastershipRole.NONE;
+import static org.onosproject.provider.nil.OsgiPropertyDefaults.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider of a fake network environment, i.e. devices, links, hosts, etc.
  * To be used for benchmarking only.
  */
-@Component(immediate = true, service = NullProviders.class)
+@Component(immediate = true, service = NullProviders.class,
+        property = {
+            "enabled:Boolean=" + false,
+            "topoShape=" + TOPO_SHAPE_DEFAULT,
+            "deviceCount:Integer=" + DEVICE_COUNT_DEFAULT,
+            "hostCount:Integer=" +  HOST_COUNT_DEFAULT,
+            "packetRate:Integer=" +  PACKET_RATE_DEFAULT,
+            "mutationRate:Double=" + MUTATION_RATE_DEFAULT,
+            "mastership=" + MASTERSHIP_DEFAULT,
+        })
 public class NullProviders {
 
     private static final Logger log = getLogger(NullProviders.class);
@@ -82,7 +92,6 @@
             "Settings: enabled={}, topoShape={}, deviceCount={}, " +
                     "hostCount={}, packetRate={}, mutationRate={}";
 
-
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ClusterService clusterService;
 
@@ -141,35 +150,29 @@
     //        label = "Enables or disables the provider")
     private boolean enabled = false;
 
-    private static final String DEFAULT_TOPO_SHAPE = "configured";
     //@Property(name = "topoShape", value = DEFAULT_TOPO_SHAPE,
     //        label = "Topology shape: configured, linear, reroute, tree, spineleaf, mesh, grid")
-    private String topoShape = DEFAULT_TOPO_SHAPE;
+    private String topoShape = TOPO_SHAPE_DEFAULT;
 
-    private static final int DEFAULT_DEVICE_COUNT = 10;
     //@Property(name = "deviceCount", intValue = DEFAULT_DEVICE_COUNT,
     //        label = "Number of devices to generate")
-    private int deviceCount = DEFAULT_DEVICE_COUNT;
+    private int deviceCount = DEVICE_COUNT_DEFAULT;
 
-    private static final int DEFAULT_HOST_COUNT = 5;
     //@Property(name = "hostCount", intValue = DEFAULT_HOST_COUNT,
     //        label = "Number of host to generate per device")
-    private int hostCount = DEFAULT_HOST_COUNT;
+    private int hostCount = HOST_COUNT_DEFAULT;
 
-    private static final int DEFAULT_PACKET_RATE = 0;
     //@Property(name = "packetRate", intValue = DEFAULT_PACKET_RATE,
     //        label = "Packet-in/s rate; 0 for no packets")
-    private int packetRate = DEFAULT_PACKET_RATE;
+    private int packetRate = PACKET_RATE_DEFAULT;
 
-    private static final double DEFAULT_MUTATION_RATE = 0;
     //@Property(name = "mutationRate", doubleValue = DEFAULT_MUTATION_RATE,
     //        label = "Link event/s topology mutation rate; 0 for no mutations")
-    private double mutationRate = DEFAULT_MUTATION_RATE;
+    private double mutationRate = MUTATION_RATE_DEFAULT;
 
-    private static final String DEFAULT_MASTERSHIP = "random";
     //@Property(name = "mastership", value = DEFAULT_MASTERSHIP,
     //        label = "Mastership given as 'random' or 'node1=dpid,dpid/node2=dpid,...'")
-    private String mastership = DEFAULT_MASTERSHIP;
+    private String mastership = MASTERSHIP_DEFAULT;
 
 
     @Activate
@@ -407,7 +410,7 @@
 
     // Re-assigns mastership roles.
     private void reassignMastership() {
-        if (mastership.equals(DEFAULT_MASTERSHIP)) {
+        if (mastership.equals(MASTERSHIP_DEFAULT)) {
             mastershipService.balanceRoles();
         } else {
             NodeId localNode = clusterService.getLocalNode().id();
diff --git a/providers/null/src/main/java/org/onosproject/provider/nil/OsgiPropertyDefaults.java b/providers/null/src/main/java/org/onosproject/provider/nil/OsgiPropertyDefaults.java
new file mode 100644
index 0000000..2dd35e5
--- /dev/null
+++ b/providers/null/src/main/java/org/onosproject/provider/nil/OsgiPropertyDefaults.java
@@ -0,0 +1,33 @@
+/*
+ * 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.provider.nil;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyDefaults {
+
+    private OsgiPropertyDefaults() {}
+
+    public static final String TOPO_SHAPE_DEFAULT = "configured";
+    public static final int DEVICE_COUNT_DEFAULT = 10;
+    public static final int HOST_COUNT_DEFAULT = 5;
+    public static final int PACKET_RATE_DEFAULT = 0;
+    public static final double MUTATION_RATE_DEFAULT = 0;
+    public static final String MASTERSHIP_DEFAULT = "random";
+
+}
diff --git a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
index 130ad53..6117339 100644
--- a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
+++ b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
@@ -139,13 +139,18 @@
 import static org.onosproject.net.optical.device.OtuPortHelper.otuPortDescription;
 import static org.onosproject.openflow.controller.Dpid.dpid;
 import static org.onosproject.openflow.controller.Dpid.uri;
+import static org.onosproject.provider.of.device.impl.OsgiPropertyConstants.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider which uses an OpenFlow controller to detect network
  * infrastructure devices.
  */
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+                POLL_FREQ + ":Integer=" + POLL_FREQ_DEFAULT,
+                PROP_FREQ + ":Boolean=" + PROP_FREQ_DEFAULT,
+        })
 public class OpenFlowDeviceProvider extends AbstractProvider implements DeviceProvider {
 
     private static final Logger LOG = getLogger(OpenFlowDeviceProvider.class);
@@ -448,17 +453,13 @@
 
     private final InternalDeviceProvider listener = new InternalDeviceProvider();
 
-    private static final String POLL_PROP_NAME = "portStatsPollFrequency";
-    private static final int POLL_INTERVAL = 5;
     //@Property(name = POLL_PROP_NAME, intValue = POLL_INTERVAL,
     //label = "Frequency (in seconds) for polling switch Port statistics")
-    private int portStatsPollFrequency = POLL_INTERVAL;
+    private int portStatsPollFrequency = POLL_FREQ_DEFAULT;
 
-    private static final String PROP_FREQ = "propertyFrequency";
-    private static final boolean DEFAULT_PROP_FREQ = true;
     //@Property(name = PROP_FREQ, boolValue = DEFAULT_PROP_FREQ,
     //label = "It indicates frequency must be used instead of wavelength for port tuning.")
-    private static boolean propFreq = DEFAULT_PROP_FREQ;
+    private static boolean propFreq = PROP_FREQ_DEFAULT;
 
     private final Timer timer = new Timer("onos-openflow-portstats-collector");
 
@@ -501,7 +502,7 @@
         Dictionary<?, ?> properties = context != null ? context.getProperties() : new Properties();
         int newPortStatsPollFrequency;
         try {
-            String s = get(properties, POLL_PROP_NAME);
+            String s = get(properties, POLL_FREQ);
             newPortStatsPollFrequency = isNullOrEmpty(s) ? portStatsPollFrequency : Integer.parseInt(s.trim());
 
         } catch (NumberFormatException | ClassCastException e) {
diff --git a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OsgiPropertyConstants.java b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..7c6b804
--- /dev/null
+++ b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OsgiPropertyConstants.java
@@ -0,0 +1,32 @@
+/*
+ * 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.provider.of.device.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String POLL_FREQ = "portStatsPollFrequency";
+    public static final int POLL_FREQ_DEFAULT = 5;
+
+    public static final String PROP_FREQ = "propertyFrequency";
+    public static final boolean PROP_FREQ_DEFAULT = true;
+
+}
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
index 33ffdb6..bc06fe6 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OpenFlowRuleProvider.java
@@ -102,13 +102,18 @@
 import static com.google.common.base.Preconditions.checkNotNull;
 import static com.google.common.base.Strings.isNullOrEmpty;
 import static org.onlab.util.Tools.get;
+import static org.onosproject.provider.of.flow.impl.OsgiPropertyConstants.*;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider which uses an OpenFlow controller to detect network end-station
  * hosts.
  */
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+                POLL_FREQUENCY + ":Integer=" + POLL_FREQUENCY_DEFAULT,
+                ADAPTIVE_FLOW_SAMPLING + ":Boolean=" + ADAPTIVE_FLOW_SAMPLING_DEFAULT,
+        })
 public class OpenFlowRuleProvider extends AbstractProvider
         implements FlowRuleProvider {
 
@@ -126,18 +131,16 @@
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected DriverService driverService;
 
-    private static final int DEFAULT_POLL_FREQUENCY = 5;
     private static final int MIN_EXPECTED_BYTE_LEN = 56;
     private static final int SKIP_BYTES = 4;
-    private static final boolean DEFAULT_ADAPTIVE_FLOW_SAMPLING = false;
 
     //@Property(name = "flowPollFrequency", intValue = DEFAULT_POLL_FREQUENCY,
     //        label = "Frequency (in seconds) for polling flow statistics")
-    private int flowPollFrequency = DEFAULT_POLL_FREQUENCY;
+    private int flowPollFrequency = POLL_FREQUENCY_DEFAULT;
 
     //@Property(name = "adaptiveFlowSampling", boolValue = DEFAULT_ADAPTIVE_FLOW_SAMPLING,
     //        label = "Adaptive Flow Sampling is on or off")
-    private boolean adaptiveFlowSampling = DEFAULT_ADAPTIVE_FLOW_SAMPLING;
+    private boolean adaptiveFlowSampling = ADAPTIVE_FLOW_SAMPLING_DEFAULT;
 
     private FlowRuleProviderService providerService;
 
@@ -194,7 +197,7 @@
         Dictionary<?, ?> properties = context.getProperties();
         int newFlowPollFrequency;
         try {
-            String s = get(properties, "flowPollFrequency");
+            String s = get(properties, POLL_FREQUENCY);
             newFlowPollFrequency = isNullOrEmpty(s) ? flowPollFrequency : Integer.parseInt(s.trim());
 
         } catch (NumberFormatException | ClassCastException e) {
@@ -209,7 +212,7 @@
         log.info("Settings: flowPollFrequency={}", flowPollFrequency);
 
         boolean newAdaptiveFlowSampling;
-        String s = get(properties, "adaptiveFlowSampling");
+        String s = get(properties, ADAPTIVE_FLOW_SAMPLING);
         newAdaptiveFlowSampling = isNullOrEmpty(s) ? adaptiveFlowSampling : Boolean.parseBoolean(s.trim());
 
         if (newAdaptiveFlowSampling != adaptiveFlowSampling) {
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OsgiPropertyConstants.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..36022e8
--- /dev/null
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/OsgiPropertyConstants.java
@@ -0,0 +1,32 @@
+/*
+ * 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.provider.of.flow.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String POLL_FREQUENCY = "flowPollFrequency";
+    public static final String ADAPTIVE_FLOW_SAMPLING = "adaptiveFlowSampling";
+
+    public static final int POLL_FREQUENCY_DEFAULT = 5;
+    public static final boolean ADAPTIVE_FLOW_SAMPLING_DEFAULT = false;
+
+}
diff --git a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java
index a43c295..a74e2c7 100644
--- a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java
+++ b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OpenFlowGroupProvider.java
@@ -84,12 +84,17 @@
 import java.util.concurrent.atomic.AtomicLong;
 
 import static org.onlab.util.Tools.getIntegerProperty;
+import static org.onosproject.provider.of.group.impl.OsgiPropertyConstants.POLL_FREQUENCY;
+import static org.onosproject.provider.of.group.impl.OsgiPropertyConstants.POLL_FREQUENCY_DEFAULT;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider which uses an OpenFlow controller to handle Group.
  */
-@Component(immediate = true)
+@Component(immediate = true,
+        property = {
+            POLL_FREQUENCY + ":Integer=" + POLL_FREQUENCY_DEFAULT,
+        })
 public class OpenFlowGroupProvider extends AbstractProvider implements GroupProvider {
 
     private final Logger log = getLogger(getClass());
@@ -114,13 +119,11 @@
 
     private GroupProviderService providerService;
 
-    private static final int DEFAULT_POLL_INTERVAL = 10;
     private static final String COMPONENT = "org.onosproject.provider.of.group.impl.OpenFlowGroupProvider";
-    private static final String GROUP_POLL_INTERVAL_CONST = "groupPollInterval";
 
     //@Property(name = "groupPollInterval", intValue = DEFAULT_POLL_INTERVAL,
     //        label = "Frequency (in seconds) for polling group statistics")
-    private int groupPollInterval = DEFAULT_POLL_INTERVAL;
+    private int groupPollInterval = POLL_FREQUENCY_DEFAULT;
 
     private final InternalGroupProvider listener = new InternalGroupProvider();
 
@@ -173,7 +176,7 @@
     @Modified
     public void modified(ComponentContext context) {
         Dictionary<?, ?> properties = context != null ? context.getProperties() : new Properties();
-        Integer newGroupPollInterval = getIntegerProperty(properties, GROUP_POLL_INTERVAL_CONST);
+        Integer newGroupPollInterval = getIntegerProperty(properties, POLL_FREQUENCY);
         if (newGroupPollInterval != null && newGroupPollInterval > 0
                 && newGroupPollInterval != groupPollInterval) {
             groupPollInterval = newGroupPollInterval;
@@ -181,7 +184,7 @@
         } else if (newGroupPollInterval != null && newGroupPollInterval <= 0) {
             log.warn("groupPollInterval must be greater than 0");
             //If the new value <= 0 reset property with old value.
-            cfgService.setProperty(COMPONENT, GROUP_POLL_INTERVAL_CONST, Integer.toString(groupPollInterval));
+            cfgService.setProperty(COMPONENT, POLL_FREQUENCY, Integer.toString(groupPollInterval));
         }
     }
 
diff --git a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OsgiPropertyConstants.java b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..43bd7e4
--- /dev/null
+++ b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/OsgiPropertyConstants.java
@@ -0,0 +1,29 @@
+/*
+ * 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.provider.of.group.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String POLL_FREQUENCY = "groupPollInterval";
+    public static final int POLL_FREQUENCY_DEFAULT = 10;
+
+}
diff --git a/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/OsgiPropertyConstants.java b/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..4d7b840
--- /dev/null
+++ b/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/OsgiPropertyConstants.java
@@ -0,0 +1,29 @@
+/*
+ * 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.provider.pcep.tunnel.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String POLL_FREQUENCY = "tunnelStatsPollFrequency";
+    public static final int POLL_FREQUENCY_DEFAULT = 10;
+
+}
diff --git a/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProvider.java b/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProvider.java
index 41215ba..04612c45 100644
--- a/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProvider.java
+++ b/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/PcepTunnelProvider.java
@@ -154,6 +154,8 @@
 import static org.onosproject.pcep.server.PcepLspSyncAction.SEND_UPDATE;
 import static org.onosproject.pcepio.protocol.ver1.PcepMetricObjectVer1.IGP_METRIC;
 import static org.onosproject.pcepio.protocol.ver1.PcepMetricObjectVer1.TE_METRIC;
+import static org.onosproject.provider.pcep.tunnel.impl.OsgiPropertyConstants.POLL_FREQUENCY;
+import static org.onosproject.provider.pcep.tunnel.impl.OsgiPropertyConstants.POLL_FREQUENCY_DEFAULT;
 import static org.onosproject.provider.pcep.tunnel.impl.RequestType.CREATE;
 import static org.onosproject.provider.pcep.tunnel.impl.RequestType.DELETE;
 import static org.onosproject.provider.pcep.tunnel.impl.RequestType.LSP_STATE_RPT;
@@ -164,7 +166,10 @@
  * Provider which uses an PCEP controller to detect, update, create network
  * tunnels.
  */
-@Component(immediate = true, service = TunnelProvider.class)
+@Component(immediate = true, service = TunnelProvider.class,
+        property = {
+                POLL_FREQUENCY + ":Integer=" + POLL_FREQUENCY_DEFAULT,
+        })
 public class PcepTunnelProvider extends AbstractProvider implements TunnelProvider {
 
     private static final Logger log = getLogger(PcepTunnelProvider.class);
@@ -178,10 +183,9 @@
     private static final int WAIT_TIME = 5;
     public static final String LSRID = "lsrId";
 
-    static final int POLL_INTERVAL = 10;
     //@Property(name = "tunnelStatsPollFrequency", intValue = POLL_INTERVAL,
     //        label = "Frequency (in seconds) for polling tunnel statistics")
-    private int tunnelStatsPollFrequency = POLL_INTERVAL;
+    private int tunnelStatsPollFrequency = POLL_FREQUENCY_DEFAULT;
 
     private static final String TUNNLE_NOT_NULL = "Create failed,The given port may be wrong or has been occupied.";
 
@@ -262,7 +266,7 @@
         Dictionary<?, ?> properties = context.getProperties();
         int newTunnelStatsPollFrequency;
         try {
-            String s = get(properties, "tunnelStatsPollFrequency");
+            String s = get(properties, POLL_FREQUENCY);
             newTunnelStatsPollFrequency = isNullOrEmpty(s) ? tunnelStatsPollFrequency : Integer.parseInt(s.trim());
 
         } catch (NumberFormatException | ClassCastException e) {
diff --git a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/OsgiPropertyConstants.java b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/OsgiPropertyConstants.java
new file mode 100644
index 0000000..41e65ba
--- /dev/null
+++ b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/OsgiPropertyConstants.java
@@ -0,0 +1,29 @@
+/*
+ * 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.provider.rest.device.impl;
+
+/**
+ * Constants for default values of configurable properties.
+ */
+public final class OsgiPropertyConstants {
+
+    private OsgiPropertyConstants() {}
+
+    public static final String POLL_FREQUENCY = "pollFrequency";
+    public static final int POLL_FREQUENCY_DEFAULT = 30;
+
+}
diff --git a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java
index e63e6e0..c6a0ae9 100644
--- a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java
+++ b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java
@@ -92,12 +92,17 @@
 import static org.onosproject.net.config.NetworkConfigEvent.Type.CONFIG_ADDED;
 import static org.onosproject.net.config.NetworkConfigEvent.Type.CONFIG_REMOVED;
 import static org.onosproject.net.config.NetworkConfigEvent.Type.CONFIG_UPDATED;
+import static org.onosproject.provider.rest.device.impl.OsgiPropertyConstants.POLL_FREQUENCY;
+import static org.onosproject.provider.rest.device.impl.OsgiPropertyConstants.POLL_FREQUENCY_DEFAULT;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provider for devices that use REST as means of configuration communication.
  */
-@Component(immediate = true, service = DeviceProvider.class)
+@Component(immediate = true, service = DeviceProvider.class,
+        property = {
+                POLL_FREQUENCY + ":Integer=" + POLL_FREQUENCY_DEFAULT,
+        })
 public class RestDeviceProvider extends AbstractProvider
         implements DeviceProvider {
     private static final String APP_NAME = "org.onosproject.restsb";
@@ -106,7 +111,6 @@
     private static final String IPADDRESS = "ipaddress";
     private static final String ISNOTNULL = "Rest device is not null";
     private static final String UNKNOWN = "unknown";
-    private static final String POLL_FREQUENCY = "pollFrequency";
     private static final int REST_TIMEOUT_SEC = 5;
     private static final int EXECUTOR_THREAD_POOL_SIZE = 8;
     private final Logger log = getLogger(getClass());
@@ -132,11 +136,10 @@
     @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected DriverService driverService;
 
-    private static final int DEFAULT_POLL_FREQUENCY_SECONDS = 30;
     //@Property(name = POLL_FREQUENCY, intValue = DEFAULT_POLL_FREQUENCY_SECONDS,
     //        label = "Configure poll frequency for port status and statistics; " +
     //                "default is 30 seconds")
-    private int pollFrequency = DEFAULT_POLL_FREQUENCY_SECONDS;
+    private int pollFrequency = POLL_FREQUENCY_DEFAULT;
 
     private DeviceProviderService providerService;
     private ApplicationId appId;
@@ -182,7 +185,7 @@
         if (context != null) {
             Dictionary<?, ?> properties = context.getProperties();
             pollFrequency = Tools.getIntegerProperty(properties, POLL_FREQUENCY,
-                                                     DEFAULT_POLL_FREQUENCY_SECONDS);
+                                                     POLL_FREQUENCY_DEFAULT);
             log.info("Configured. Poll frequency is configured to {} seconds", pollFrequency);
         }