diff --git a/drivers/optical/src/main/java/org/onosproject/driver/optical/config/LambdaConfig.java b/drivers/optical/src/main/java/org/onosproject/driver/optical/config/LambdaConfig.java
new file mode 100644
index 0000000..5592155
--- /dev/null
+++ b/drivers/optical/src/main/java/org/onosproject/driver/optical/config/LambdaConfig.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2017-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.driver.optical.config;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.Optional;
+
+import org.onosproject.net.ChannelSpacing;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.GridType;
+import org.onosproject.net.config.BaseConfig;
+import org.slf4j.Logger;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.annotations.Beta;
+
+/**
+ * Configuration about available lambda resource on a port.
+ */
+@Beta
+public class LambdaConfig extends BaseConfig<ConnectPoint> {
+
+    private static final Logger log = getLogger(LambdaConfig.class);
+
+    /**
+     * Configuration key for {@link LambdaConfig}. ({@value #CONFIG_KEY})
+     */
+    public static final String CONFIG_KEY = "lambdas";
+
+    /**
+     * JSON key for GridType. {@value #GRID_TYPE}.
+     * Expects a string containing one of {@link GridType} element.
+     */
+    private static final String GRID_TYPE = "gridType";
+
+    /**
+     * JSON key for DWDM ChannelSpacing. {@value #DWDM_SPACING}.
+     * Expects a string containing one of {@link ChannelSpacing} element.
+     */
+    private static final String DWDM_SPACING = "dwdmSpacing";
+
+    /**
+     * JSON key for start value of slot index (inclusive). {@value #SLOT_START}.
+     *
+     * Expects an integer value. (default:1).
+     * @see OchSignal#newDwdmSlot(ChannelSpacing, int)
+     * @see OchSignal#newFlexGridSlot(int)
+     */
+    private static final String SLOT_START = "slotStart";
+
+    /**
+     * JSON key for step value of slot index. {@value #SLOT_START}.
+     *
+     * Expects a positive integer value. (default:1).
+     * @see OchSignal#newDwdmSlot(ChannelSpacing, int)
+     * @see OchSignal#newFlexGridSlot(int)
+     */
+    private static final String SLOT_STEP = "slotStep";
+
+    /**
+     * JSON key for end value of slot index (inclusive). {@value #SLOT_START}.
+     *
+     * Expects an integer value. (default:1).
+     * @see OchSignal#newDwdmSlot(ChannelSpacing, int)
+     * @see OchSignal#newFlexGridSlot(int)
+     */
+    private static final String SLOT_END = "slotEnd";
+
+    @Override
+    public boolean isValid() {
+        if (!hasField(GRID_TYPE)) {
+            log.warn("GridType missing: {}", this);
+            return false;
+        }
+        try {
+            GridType type = gridType();
+            Optional<ChannelSpacing> dwdmSpacing = dwdmSpacing();
+            if (type == GridType.DWDM) {
+                if (!dwdmSpacing.isPresent()) {
+                    log.warn("DWDM spacing missing: {}", this);
+                    return false;
+                }
+            }
+
+            return slotStep() > 0 &&
+                   slotStart() <= slotEnd();
+        } catch (NullPointerException | IllegalArgumentException e) {
+            log.warn("Invalid netcfg: {}", this, e);
+            return false;
+        }
+    }
+
+    /**
+     * Returns available lambda resource type.
+     *
+     * @return grid type
+     */
+    public GridType gridType() {
+        return GridType.valueOf(get(GRID_TYPE, null));
+    }
+
+    /**
+     * Returns DWDM channel spacing.
+     *
+     * @return channel spacing if specified
+     */
+    public Optional<ChannelSpacing> dwdmSpacing() {
+        return Optional.ofNullable(get(DWDM_SPACING, null))
+                       .map(ChannelSpacing::valueOf);
+    }
+
+    /**
+     * Returns start of slot index. (inclusive)
+     *
+     * @return start of slot index
+     */
+    public int slotStart() {
+        return get(SLOT_START, 1);
+    }
+
+    /**
+     * Returns positive incremental step of slot index.
+     *
+     * @return step of slot index
+     */
+    public int slotStep() {
+        return get(SLOT_STEP, 1);
+    }
+
+    /**
+     * Returns end of slot index. (inclusive)
+     *
+     * @return end of slot index
+     */
+    public int slotEnd() {
+        return get(SLOT_END, 1);
+    }
+
+
+    /**
+     * Create a {@link LambdaConfig}.
+     * <p>
+     * Note: created instance needs to be initialized by #init(..) before using.
+     */
+    public LambdaConfig() {
+        super();
+    }
+
+    /**
+     * Create a {@link LambdaConfig} for specified Port.
+     * <p>
+     * Note: created instance is not bound to NetworkConfigService,
+     * cannot use {@link #apply()}. Must be passed to the service
+     * using NetworkConfigService#applyConfig
+     *
+     * @param cp ConnectPoint for a port
+     */
+    public LambdaConfig(ConnectPoint cp) {
+        ObjectMapper mapper = new ObjectMapper();
+        init(cp, CONFIG_KEY, mapper.createObjectNode(), mapper, null);
+    }
+
+}
diff --git a/drivers/optical/src/main/java/org/onosproject/driver/optical/query/ConfigLambdaQuery.java b/drivers/optical/src/main/java/org/onosproject/driver/optical/query/ConfigLambdaQuery.java
new file mode 100644
index 0000000..3eec777
--- /dev/null
+++ b/drivers/optical/src/main/java/org/onosproject/driver/optical/query/ConfigLambdaQuery.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2017-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.driver.optical.query;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.LinkedHashSet;
+import java.util.Optional;
+import java.util.Set;
+
+import org.onosproject.driver.optical.config.LambdaConfig;
+import org.onosproject.net.ChannelSpacing;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.GridType;
+import org.onosproject.net.OchSignal;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.behaviour.LambdaQuery;
+import org.onosproject.net.config.NetworkConfigService;
+import org.onosproject.net.driver.AbstractHandlerBehaviour;
+import org.slf4j.Logger;
+
+import com.google.common.collect.ImmutableSet;
+
+/**
+ * {@link LambdaQuery} which responds based on {@link LambdaConfig}.
+ */
+public class ConfigLambdaQuery
+        extends AbstractHandlerBehaviour
+        implements LambdaQuery {
+
+    private static final Logger log = getLogger(ConfigLambdaQuery.class);
+
+    @Override
+    public Set<OchSignal> queryLambdas(PortNumber port) {
+
+        NetworkConfigService netcfg = handler().get(NetworkConfigService.class);
+        ConnectPoint cp = new ConnectPoint(data().deviceId(), port);
+        LambdaConfig cfg = netcfg.getConfig(cp, LambdaConfig.class);
+        if (cfg == null) {
+            return ImmutableSet.of();
+        }
+
+        GridType type = cfg.gridType();
+        Optional<ChannelSpacing> dwdmSpacing = cfg.dwdmSpacing();
+        int start = cfg.slotStart();
+        int step = cfg.slotStep();
+        int end = cfg.slotEnd();
+
+        Set<OchSignal> lambdas = new LinkedHashSet<>();
+        for (int i = start; i <= end; i += step) {
+            switch (type) {
+            case DWDM:
+                lambdas.add(OchSignal.newDwdmSlot(dwdmSpacing.get(), i));
+                break;
+
+            case FLEX:
+                lambdas.add(OchSignal.newFlexGridSlot(i));
+                break;
+
+            case CWDM:
+            default:
+                log.warn("Unsupported grid type: {}", type);
+                break;
+            }
+        }
+        return lambdas;
+    }
+
+}
diff --git a/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalDriversLoader.java b/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalDriversLoader.java
index 4c1dc4f..c65995e 100644
--- a/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalDriversLoader.java
+++ b/drivers/optical/src/main/java/org/onosproject/drivers/optical/OpticalDriversLoader.java
@@ -16,6 +16,7 @@
 
 package org.onosproject.drivers.optical;
 
+import static org.onosproject.net.config.basics.SubjectFactories.CONNECT_POINT_SUBJECT_FACTORY;
 import static org.onosproject.net.config.basics.SubjectFactories.DEVICE_SUBJECT_FACTORY;
 
 import java.util.List;
@@ -25,6 +26,8 @@
 import org.apache.felix.scr.annotations.Reference;
 import org.apache.felix.scr.annotations.ReferenceCardinality;
 import org.onosproject.driver.optical.config.FlowTableConfig;
+import org.onosproject.driver.optical.config.LambdaConfig;
+import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.config.ConfigFactory;
 import org.onosproject.net.config.NetworkConfigRegistry;
@@ -57,7 +60,14 @@
              public FlowTableConfig createConfig() {
                  return new FlowTableConfig();
              }
-
+         },
+         new ConfigFactory<ConnectPoint, LambdaConfig>(CONNECT_POINT_SUBJECT_FACTORY,
+                 LambdaConfig.class,
+                 LambdaConfig.CONFIG_KEY) {
+             @Override
+             public LambdaConfig createConfig() {
+                 return new LambdaConfig();
+             }
          });