diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalConfigProvider.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalConfigProvider.java
new file mode 100644
index 0000000..86c1c0b
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalConfigProvider.java
@@ -0,0 +1,338 @@
+package org.onlab.onos.optical.cfg;
+
+import static org.onlab.onos.net.DeviceId.deviceId;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+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.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.JsonParseException;
+import org.codehaus.jackson.annotate.JsonIgnoreProperties;
+import org.codehaus.jackson.map.JsonMappingException;
+import org.codehaus.jackson.map.ObjectMapper;
+import org.onlab.onos.net.ConnectPoint;
+import org.onlab.onos.net.DefaultAnnotations;
+import org.onlab.onos.net.Device;
+import org.onlab.onos.net.DeviceId;
+import org.onlab.onos.net.Link;
+import org.onlab.onos.net.MastershipRole;
+import org.onlab.onos.net.PortNumber;
+import org.onlab.onos.net.device.DefaultDeviceDescription;
+import org.onlab.onos.net.device.DeviceDescription;
+import org.onlab.onos.net.device.DeviceProvider;
+import org.onlab.onos.net.device.DeviceProviderRegistry;
+import org.onlab.onos.net.device.DeviceProviderService;
+import org.onlab.onos.net.link.DefaultLinkDescription;
+import org.onlab.onos.net.link.LinkProvider;
+import org.onlab.onos.net.link.LinkProviderRegistry;
+import org.onlab.onos.net.link.LinkProviderService;
+import org.onlab.onos.net.provider.AbstractProvider;
+import org.onlab.onos.net.provider.ProviderId;
+import org.onlab.packet.ChassisId;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * OpticalConfigProvider emulates the SB network provider for optical switches,
+ * optical links and any other state that needs to be configured for correct network
+ * operations.
+ *
+ */
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+@Component(immediate = true)
+public class OpticalConfigProvider extends AbstractProvider implements DeviceProvider, LinkProvider {
+
+    protected static final Logger log = LoggerFactory
+            .getLogger(OpticalConfigProvider.class);
+
+    // TODO: fix hard coded file path later.
+    private static final String DEFAULT_CONFIG_FILE =
+            "/opt/onos/config/demo-3-roadm-2-ps.json";
+    private String configFileName = DEFAULT_CONFIG_FILE;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected LinkProviderRegistry linkProviderRegistry;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected DeviceProviderRegistry deviceProviderRegistry;
+
+    private static final String OPTICAL_ANNOTATION = "optical.";
+
+    private LinkProviderService linkProviderService;
+    private DeviceProviderService deviceProviderService;
+
+    private static final List<Roadm> RAW_ROADMS = new ArrayList<>();
+    private static final List<WdmLink> RAW_WDMLINKS = new ArrayList<>();
+    private static final List<PktOptLink> RAW_PKTOPTLINKS = new ArrayList<>();
+
+    private static final String ROADM = "Roadm";
+    private static final String WDM_LINK = "wdmLink";
+    private static final String PKT_OPT_LINK = "pktOptLink";
+
+    protected OpticalNetworkConfig opticalNetworkConfig;
+
+    public OpticalConfigProvider() {
+        super(new ProviderId("of", "org.onlab.onos.provider.opticalConfig", true));
+    }
+
+    @Activate
+    protected void activate() {
+        linkProviderService = linkProviderRegistry.register(this);
+        deviceProviderService = deviceProviderRegistry.register(this);
+        log.info("Starting optical network configuration process...");
+        log.info("Optical config file set to {}", configFileName);
+
+        loadOpticalConfig();
+        parseOpticalConfig();
+        publishOpticalConfig();
+    }
+
+    @Deactivate
+    protected void deactivate() {
+        linkProviderRegistry.unregister(this);
+        linkProviderService = null;
+        deviceProviderRegistry.unregister(this);
+        deviceProviderService = null;
+        RAW_ROADMS.clear();
+        RAW_WDMLINKS.clear();
+        RAW_PKTOPTLINKS.clear();
+        log.info("Stopped");
+    }
+
+    private void loadOpticalConfig() {
+        ObjectMapper mapper = new ObjectMapper();
+        opticalNetworkConfig = new OpticalNetworkConfig();
+        try {
+            opticalNetworkConfig = mapper.readValue(new File(configFileName), OpticalNetworkConfig.class);
+        } catch (JsonParseException e) {
+            String err = String.format("JsonParseException while loading network "
+                    + "config from file: %s: %s", configFileName, e.getMessage());
+            log.error(err, e);
+        } catch (JsonMappingException e) {
+            String err = String.format(
+                    "JsonMappingException while loading network config "
+                            + "from file: %s: %s", configFileName, e.getMessage());
+            log.error(err, e);
+        } catch (IOException e) {
+            String err = String.format("IOException while loading network config "
+                    + "from file: %s %s", configFileName, e.getMessage());
+            log.error(err, e);
+        }
+    }
+
+    private void parseOpticalConfig() {
+        List<OpticalSwitchDescription> swList = opticalNetworkConfig.getOpticalSwitches();
+        List<OpticalLinkDescription> lkList = opticalNetworkConfig.getOpticalLinks();
+
+        for (OpticalSwitchDescription sw : swList) {
+            String swtype = sw.getType();
+            boolean allow = sw.isAllowed();
+           if (swtype.equals(ROADM) && allow) {
+               int regNum = 0;
+               Set<Map.Entry<String, JsonNode>> m = sw.params.entrySet();
+               for (Map.Entry<String, JsonNode> e : m) {
+                       String key = e.getKey();
+                       JsonNode j = e.getValue();
+                       if (key.equals("numRegen")) {
+                           regNum = j.asInt();
+                       }
+                }
+
+                Roadm newRoadm = new Roadm();
+                newRoadm.setName(sw.name);
+                newRoadm.setNodeId(sw.nodeDpid);
+                newRoadm.setLongtitude(sw.longitude);
+                newRoadm.setLatitude(sw.latitude);
+                newRoadm.setRegenNum(regNum);
+
+                RAW_ROADMS.add(newRoadm);
+                log.info(newRoadm.toString());
+            }
+           }
+
+        for (OpticalLinkDescription lk : lkList) {
+            String lktype = lk.getType();
+            switch (lktype) {
+            case WDM_LINK:
+                WdmLink newWdmLink = new WdmLink();
+                newWdmLink.setSrcNodeId(lk.getNodeDpid1());
+                newWdmLink.setSnkNodeId(lk.getNodeDpid2());
+                newWdmLink.setAdminWeight(1000); // default weight for each WDM link.
+                Set<Map.Entry<String, JsonNode>> m = lk.params.entrySet();
+                for (Map.Entry<String, JsonNode> e : m) {
+                    String key = e.getKey();
+                    JsonNode j = e.getValue();
+                    if (key.equals("nodeName1")) {
+                        newWdmLink.setSrcNodeName(j.asText());
+                    } else if (key.equals("nodeName2")) {
+                        newWdmLink.setSnkNodeName(j.asText());
+                    } else if (key.equals("port1")) {
+                        newWdmLink.setSrcPort(j.asInt());
+                    } else if (key.equals("port2")) {
+                        newWdmLink.setSnkPort(j.asInt());
+                    } else if (key.equals("distKms")) {
+                        newWdmLink.setDistance(j.asDouble());
+                    } else if (key.equals("numWaves")) {
+                        newWdmLink.setWavelengthNumber(j.asInt());
+                    } else {
+                        log.error("error found");
+                        // TODO add exception processing;
+                    }
+                }
+                RAW_WDMLINKS.add(newWdmLink);
+                log.info(newWdmLink.toString());
+
+                break;
+
+            case PKT_OPT_LINK:
+                PktOptLink newPktOptLink = new PktOptLink();
+                newPktOptLink.setSrcNodeId(lk.getNodeDpid1());
+                newPktOptLink.setSnkNodeId(lk.getNodeDpid2());
+                newPktOptLink.setAdminWeight(10); // default weight for each packet-optical link.
+                Set<Map.Entry<String, JsonNode>> ptm = lk.params.entrySet();
+                for (Map.Entry<String, JsonNode> e : ptm) {
+                    String key = e.getKey();
+                    JsonNode j = e.getValue();
+                    if (key.equals("nodeName1")) {
+                        newPktOptLink.setSrcNodeName(j.asText());
+                    } else if (key.equals("nodeName2")) {
+                        newPktOptLink.setSnkNodeName(j.asText());
+                    } else if (key.equals("port1")) {
+                        newPktOptLink.setSrcPort(j.asInt());
+                    } else if (key.equals("port2")) {
+                        newPktOptLink.setSnkPort(j.asInt());
+                    } else if (key.equals("bandWidth")) {
+                        newPktOptLink.setBandwdith(j.asDouble());
+                    } else {
+                        log.error("error found");
+                        // TODO add exception processing;
+                    }
+                }
+
+                RAW_PKTOPTLINKS.add(newPktOptLink);
+                log.info(newPktOptLink.toString());
+                break;
+            default:
+            }
+        }
+    }
+
+    private void publishOpticalConfig() {
+        if (deviceProviderService == null || linkProviderService == null) {
+            return;
+        }
+
+        // Discover the optical ROADM objects
+        Iterator<Roadm> iterWdmNode = RAW_ROADMS.iterator();
+        while (iterWdmNode.hasNext()) {
+            Roadm value = iterWdmNode.next();
+            DeviceId did = deviceId("of:" + value.getNodeId().replace(":", ""));
+            ChassisId cid = new ChassisId(value.getNodeId());
+            DefaultAnnotations extendedAttributes = DefaultAnnotations.builder()
+                    .set(OPTICAL_ANNOTATION + "switchType", "ROADM")
+                    .set(OPTICAL_ANNOTATION + "switchName", value.getName())
+                    .set(OPTICAL_ANNOTATION + "latitude", Double.toString(value.getLatitude()))
+                    .set(OPTICAL_ANNOTATION + "longtitude", Double.toString(value.getLongtitude()))
+                    .set(OPTICAL_ANNOTATION + "regNum", Integer.toString(value.getRegenNum()))
+                    .build();
+
+            DeviceDescription description =
+                    new DefaultDeviceDescription(did.uri(),
+                                                 Device.Type.SWITCH,
+                                                 "",
+                                                 "",
+                                                 "",
+                                                 "",
+                                                 cid,
+                                                 extendedAttributes);
+            deviceProviderService.deviceConnected(did, description);
+        }
+
+        // Discover the optical WDM link objects
+        Iterator<WdmLink> iterWdmlink = RAW_WDMLINKS.iterator();
+        while (iterWdmlink.hasNext()) {
+            WdmLink value = iterWdmlink.next();
+
+            DeviceId srcNodeId = deviceId("of:" + value.getSrcNodeId().replace(":", ""));
+            DeviceId snkNodeId = deviceId("of:" + value.getSnkNodeId().replace(":", ""));
+
+            PortNumber srcPort = PortNumber.portNumber(value.getSrcPort());
+            PortNumber snkPort = PortNumber.portNumber(value.getSnkPort());
+
+            ConnectPoint srcPoint = new ConnectPoint(srcNodeId, srcPort);
+            ConnectPoint snkPoint = new ConnectPoint(snkNodeId, snkPort);
+
+            DefaultAnnotations extendedAttributes = DefaultAnnotations.builder()
+                    .set(OPTICAL_ANNOTATION + "linkType", "WDM")
+                    .set(OPTICAL_ANNOTATION + "distance", Double.toString(value.getDistance()))
+                    .set(OPTICAL_ANNOTATION + "cost", Double.toString(value.getDistance()))
+                    .set(OPTICAL_ANNOTATION + "adminWeight", Double.toString(value.getAdminWeight()))
+                    .set(OPTICAL_ANNOTATION + "wavelengthNum", Integer.toString(value.getWavelengthNumber()))
+                    .build();
+
+            DefaultLinkDescription linkDescription =
+                    new DefaultLinkDescription(srcPoint,
+                                                 snkPoint,
+                                                 Link.Type.DIRECT,
+                                                 extendedAttributes);
+
+            linkProviderService.linkDetected(linkDescription);
+            log.info(String.format("WDM link: %s : %s",
+                    linkDescription.src().toString(), linkDescription.dst().toString()));
+        }
+
+        // Discover the packet optical link objects
+        Iterator<PktOptLink> iterPktOptlink = RAW_PKTOPTLINKS.iterator();
+        while (iterPktOptlink.hasNext()) {
+            PktOptLink value = iterPktOptlink.next();
+            DeviceId srcNodeId = deviceId("of:" + value.getSrcNodeId().replace(":", ""));
+            DeviceId snkNodeId = deviceId("of:" + value.getSnkNodeId().replace(":", ""));
+
+            PortNumber srcPort = PortNumber.portNumber(value.getSrcPort());
+            PortNumber snkPort = PortNumber.portNumber(value.getSnkPort());
+
+            ConnectPoint srcPoint = new ConnectPoint(srcNodeId, srcPort);
+            ConnectPoint snkPoint = new ConnectPoint(snkNodeId, snkPort);
+
+            DefaultAnnotations extendedAttributes = DefaultAnnotations.builder()
+                    .set(OPTICAL_ANNOTATION + "linkType", "PktOptLink")
+                    .set(OPTICAL_ANNOTATION + "bandwidth", Double.toString(value.getBandwidth()))
+                    .set(OPTICAL_ANNOTATION + "cost", Double.toString(value.getBandwidth()))
+                    .set(OPTICAL_ANNOTATION + "adminWeight", Double.toString(value.getAdminWeight()))
+                    .build();
+
+            DefaultLinkDescription linkDescription =
+                    new DefaultLinkDescription(srcPoint,
+                                                 snkPoint,
+                                                 Link.Type.DIRECT,
+                                                 extendedAttributes);
+
+            linkProviderService.linkDetected(linkDescription);
+            log.info(String.format("Packet-optical link: %s : %s",
+                    linkDescription.src().toString(), linkDescription.dst().toString()));
+        }
+
+    }
+
+    @Override
+    public void triggerProbe(Device device) {
+        // TODO We may want to consider re-reading config files and publishing them based on this event.
+    }
+
+    @Override
+    public void roleChanged(Device device, MastershipRole newRole) {
+        // TODO Auto-generated method stub.
+    }
+
+}
diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalLinkDescription.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalLinkDescription.java
new file mode 100644
index 0000000..af616ef
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalLinkDescription.java
@@ -0,0 +1,89 @@
+package org.onlab.onos.optical.cfg;
+
+import java.util.Map;
+import org.codehaus.jackson.JsonNode;
+import org.onlab.util.HexString;
+
+/**
+ * Public class corresponding to JSON described data model.
+ */
+public class OpticalLinkDescription {
+    protected String type;
+    protected Boolean allowed;
+    protected long dpid1;
+    protected long dpid2;
+    protected String nodeDpid1;
+    protected String nodeDpid2;
+    protected Map<String, JsonNode> params;
+    protected Map<String, String> publishAttributes;
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public Boolean isAllowed() {
+        return allowed;
+    }
+
+    public void setAllowed(Boolean allowed) {
+        this.allowed = allowed;
+    }
+
+    public String getNodeDpid1() {
+        return nodeDpid1;
+    }
+
+    public void setNodeDpid1(String nodeDpid1) {
+        this.nodeDpid1 = nodeDpid1;
+        this.dpid1 = HexString.toLong(nodeDpid1);
+    }
+
+    public String getNodeDpid2() {
+        return nodeDpid2;
+    }
+
+    public void setNodeDpid2(String nodeDpid2) {
+        this.nodeDpid2 = nodeDpid2;
+        this.dpid2 = HexString.toLong(nodeDpid2);
+    }
+
+    public long getDpid1() {
+        return dpid1;
+    }
+
+    public void setDpid1(long dpid1) {
+        this.dpid1 = dpid1;
+        this.nodeDpid1 = HexString.toHexString(dpid1);
+    }
+
+    public long getDpid2() {
+        return dpid2;
+    }
+
+    public void setDpid2(long dpid2) {
+        this.dpid2 = dpid2;
+        this.nodeDpid2 = HexString.toHexString(dpid2);
+    }
+
+    public Map<String, JsonNode> getParams() {
+        return params;
+    }
+
+    public void setParams(Map<String, JsonNode> params) {
+        this.params = params;
+    }
+
+    public Map<String, String> getPublishAttributes() {
+        return publishAttributes;
+    }
+
+    public void setPublishAttributes(Map<String, String> publishAttributes) {
+        this.publishAttributes = publishAttributes;
+    }
+
+}
+
diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalNetworkConfig.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalNetworkConfig.java
new file mode 100644
index 0000000..a34f843
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalNetworkConfig.java
@@ -0,0 +1,40 @@
+package org.onlab.onos.optical.cfg;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Public class corresponding to JSON described data model.
+ */
+public class OpticalNetworkConfig {
+    protected static final Logger log = LoggerFactory.getLogger(OpticalNetworkConfig.class);
+
+    private List<OpticalSwitchDescription> opticalSwitches;
+    private List<OpticalLinkDescription> opticalLinks;
+
+    public OpticalNetworkConfig() {
+        opticalSwitches = new ArrayList<OpticalSwitchDescription>();
+        opticalLinks = new ArrayList<OpticalLinkDescription>();
+    }
+
+    public List<OpticalSwitchDescription> getOpticalSwitches() {
+        return opticalSwitches;
+    }
+
+    public void setOpticalSwitches(List<OpticalSwitchDescription> switches) {
+        this.opticalSwitches = switches;
+    }
+
+    public List<OpticalLinkDescription> getOpticalLinks() {
+        return opticalLinks;
+    }
+
+    public void setOpticalLinks(List<OpticalLinkDescription> links) {
+        this.opticalLinks = links;
+    }
+
+}
+
diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalSwitchDescription.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalSwitchDescription.java
new file mode 100644
index 0000000..18a3982
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/OpticalSwitchDescription.java
@@ -0,0 +1,100 @@
+package org.onlab.onos.optical.cfg;
+
+import java.util.Map;
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.annotate.JsonProperty;
+import org.onlab.util.HexString;
+
+/**
+ * Public class corresponding to JSON described data model.
+ */
+public class OpticalSwitchDescription {
+    protected String name;
+    protected long dpid;
+    protected String nodeDpid;
+    protected String type;
+    protected double latitude;
+    protected double longitude;
+    protected boolean allowed;
+    protected Map<String, JsonNode> params;
+    protected Map<String, String> publishAttributes;
+
+    public String getName() {
+        return name;
+    }
+    @JsonProperty("name")
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public long getDpid() {
+        return dpid;
+    }
+    @JsonProperty("dpid")
+    public void setDpid(long dpid) {
+        this.dpid = dpid;
+        this.nodeDpid = HexString.toHexString(dpid);
+    }
+
+    public String getNodeDpid() {
+        return nodeDpid;
+    }
+
+    public String getHexDpid() {
+        return nodeDpid;
+    }
+
+    public void setNodeDpid(String nodeDpid) {
+        this.nodeDpid = nodeDpid;
+        this.dpid = HexString.toLong(nodeDpid);
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public double getLatitude() {
+        return latitude;
+    }
+
+    public void setLatitude(double latitude) {
+        this.latitude = latitude;
+    }
+
+    public double getLongitude() {
+        return longitude;
+    }
+
+    public void setLongitude(double longitude) {
+        this.longitude = longitude;
+    }
+
+    public boolean isAllowed() {
+        return allowed;
+    }
+
+    public void setAllowed(boolean allowed) {
+        this.allowed = allowed;
+    }
+
+    public Map<String, JsonNode> getParams() {
+        return params;
+    }
+
+    public void setParams(Map<String, JsonNode> params) {
+        this.params = params;
+    }
+
+    public Map<String, String> getPublishAttributes() {
+        return publishAttributes;
+    }
+
+    public void setPublishAttributes(Map<String, String> publishAttributes) {
+        this.publishAttributes = publishAttributes;
+    }
+
+}
diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/PktOptLink.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/PktOptLink.java
new file mode 100644
index 0000000..206109f
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/PktOptLink.java
@@ -0,0 +1,110 @@
+package org.onlab.onos.optical.cfg;
+
+/**
+ * Packet-optical link Java data object.
+ */
+class PktOptLink {
+    private String srcNodeName;
+    private String snkNodeName;
+    private String srcNodeId;
+    private String snkNodeId;
+    private int srcPort;
+    private int snkPort;
+    private double bandwidth;
+    private double cost;
+    private long adminWeight;
+
+    public PktOptLink(String srcName, String snkName) {
+        this.srcNodeName = srcName;
+        this.snkNodeName = snkName;
+    }
+
+    public PktOptLink() {
+        // TODO Auto-generated constructor stub
+    }
+
+    public void setSrcNodeName(String name) {
+        this.srcNodeName = name;
+    }
+
+    public String getSrcNodeName() {
+        return this.srcNodeName;
+    }
+
+    public void setSnkNodeName(String name) {
+        this.snkNodeName = name;
+    }
+
+    public String getSnkNodeName() {
+        return this.snkNodeName;
+    }
+
+    public void setSrcNodeId(String nodeId) {
+        this.srcNodeId = nodeId;
+    }
+
+    public String getSrcNodeId() {
+        return this.srcNodeId;
+    }
+
+    public void setSnkNodeId(String nodeId) {
+        this.snkNodeId = nodeId;
+    }
+
+    public String getSnkNodeId() {
+        return this.snkNodeId;
+    }
+
+    public void setSrcPort(int port) {
+        this.srcPort = port;
+    }
+
+    public int getSrcPort() {
+        return this.srcPort;
+    }
+
+    public void setSnkPort(int port) {
+        this.snkPort = port;
+    }
+
+    public int getSnkPort() {
+        return this.snkPort;
+    }
+
+    public void setBandwdith(double x) {
+        this.bandwidth = x;
+    }
+
+    public double getBandwidth() {
+        return this.bandwidth;
+    }
+
+    public void setCost(double x) {
+        this.cost = x;
+    }
+
+    public double getCost() {
+        return this.cost;
+    }
+
+    public void setAdminWeight(long x) {
+        this.adminWeight = x;
+    }
+
+    public long getAdminWeight() {
+        return this.adminWeight;
+    }
+
+    @Override
+    public String toString() {
+        return new StringBuilder(" srcNodeName: ").append(this.srcNodeName)
+                .append(" snkNodeName: ").append(this.snkNodeName)
+                .append(" srcNodeId: ").append(this.srcNodeId)
+                .append(" snkNodeId: ").append(this.snkNodeId)
+                .append(" srcPort: ").append(this.srcPort)
+                .append(" snkPort: ").append(this.snkPort)
+                .append(" bandwidth: ").append(this.bandwidth)
+                .append(" cost: ").append(this.cost)
+                .append(" adminWeight: ").append(this.adminWeight).toString();
+    }
+}
diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/Roadm.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/Roadm.java
new file mode 100644
index 0000000..beca5af
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/Roadm.java
@@ -0,0 +1,106 @@
+package org.onlab.onos.optical.cfg;
+
+/**
+ * ROADM java data object converted from a JSON file.
+ */
+class Roadm {
+    private String name;
+    private String nodeID;
+    private double longtitude;
+    private double latitude;
+    private int regenNum;
+
+    //TODO use the following attributes when needed for configurations
+    private int tPort10G;
+    private int tPort40G;
+    private int tPort100G;
+    private int wPort;
+
+    public Roadm() {
+    }
+
+    public Roadm(String name) {
+        this.name = name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public void setNodeId(String nameId) {
+        this.nodeID = nameId;
+    }
+
+    public String getNodeId() {
+        return this.nodeID;
+    }
+
+    public void setLongtitude(double x) {
+        this.longtitude = x;
+    }
+
+    public double getLongtitude() {
+        return this.longtitude;
+    }
+
+    public void setLatitude(double y) {
+        this.latitude = y;
+    }
+
+    public double getLatitude() {
+        return this.latitude;
+    }
+
+    public void setRegenNum(int num) {
+        this.regenNum = num;
+    }
+    public int getRegenNum() {
+        return this.regenNum;
+    }
+
+    public void setTport10GNum(int num) {
+        this.tPort10G = num;
+    }
+    public int getTport10GNum() {
+        return this.tPort10G;
+    }
+
+    public void setTport40GNum(int num) {
+        this.tPort40G = num;
+    }
+    public int getTport40GNum() {
+        return this.tPort40G;
+    }
+
+    public void setTport100GNum(int num) {
+        this.tPort100G = num;
+    }
+    public int getTport100GNum() {
+        return this.tPort100G;
+    }
+
+    public void setWportNum(int num) {
+        this.wPort = num;
+    }
+    public int getWportNum() {
+        return this.wPort;
+    }
+
+    @Override
+    public String toString() {
+        return new StringBuilder(" ROADM Name: ").append(this.name)
+                .append(" nodeID: ").append(this.nodeID)
+                .append(" longtitude: ").append(this.longtitude)
+                .append(" latitude: ").append(this.latitude)
+                .append(" regenNum: ").append(this.regenNum)
+                .append(" 10GTportNum: ").append(this.tPort10G)
+                .append(" 40GTportNum: ").append(this.tPort40G)
+                .append(" 100GTportNum: ").append(this.tPort100G)
+                .append(" WportNum: ").append(this.wPort).toString();
+    }
+}
+
diff --git a/apps/optical/src/main/java/org/onlab/onos/optical/cfg/WdmLink.java b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/WdmLink.java
new file mode 100644
index 0000000..5e7b468
--- /dev/null
+++ b/apps/optical/src/main/java/org/onlab/onos/optical/cfg/WdmLink.java
@@ -0,0 +1,121 @@
+package org.onlab.onos.optical.cfg;
+
+/**
+ * WDM Link Java data object converted from a JSON file.
+ */
+class WdmLink {
+    private String srcNodeName;
+    private String snkNodeName;
+    private String srcNodeId;
+    private String snkNodeId;
+    private int srcPort;
+    private int snkPort;
+    private double distance;
+    private double cost;
+    private int wavelengthNumber;
+    private long adminWeight;
+
+    public WdmLink(String name1, String name2) {
+        this.srcNodeName = name1;
+        this.snkNodeName = name2;
+    }
+
+    public WdmLink() {
+        // TODO Auto-generated constructor stub
+    }
+
+    public void setSrcNodeName(String name) {
+        this.srcNodeName = name;
+    }
+
+    public String getSrcNodeName() {
+        return this.srcNodeName;
+    }
+
+    public void setSnkNodeName(String name) {
+        this.snkNodeName = name;
+    }
+
+    public String getSnkNodeName() {
+        return this.snkNodeName;
+    }
+
+    public void setSrcNodeId(String nodeId) {
+        this.srcNodeId = nodeId;
+    }
+
+    public String getSrcNodeId() {
+        return this.srcNodeId;
+    }
+
+    public void setSnkNodeId(String nodeId) {
+        this.snkNodeId = nodeId;
+    }
+
+    public String getSnkNodeId() {
+        return this.snkNodeId;
+    }
+
+    public void setSrcPort(int port) {
+        this.srcPort = port;
+    }
+
+    public int getSrcPort() {
+        return this.srcPort;
+    }
+
+    public void setSnkPort(int port) {
+        this.snkPort = port;
+    }
+
+    public int getSnkPort() {
+        return this.snkPort;
+    }
+
+    public void setDistance(double x) {
+        this.distance = x;
+    }
+
+    public double getDistance() {
+        return this.distance;
+    }
+
+    public void setCost(double x) {
+        this.cost = x;
+    }
+
+    public double getCost() {
+        return this.cost;
+    }
+
+    public void setWavelengthNumber(int x) {
+        this.wavelengthNumber = x;
+    }
+
+    public int getWavelengthNumber() {
+        return this.wavelengthNumber;
+    }
+
+    public void setAdminWeight(long x) {
+        this.adminWeight = x;
+    }
+
+    public long getAdminWeight() {
+        return this.adminWeight;
+    }
+
+    @Override
+    public String toString() {
+        return new StringBuilder(" srcNodeName: ").append(this.srcNodeName)
+                .append(" snkNodeName: ").append(this.snkNodeName)
+                .append(" srcNodeId: ").append(this.srcNodeId)
+                .append(" snkNodeId: ").append(this.snkNodeId)
+                .append(" srcPort: ").append(this.srcPort)
+                .append(" snkPort: ").append(this.snkPort)
+                .append(" distance: ").append(this.distance)
+                .append(" cost: ").append(this.cost)
+                .append(" wavelengthNumber: ").append(this.wavelengthNumber)
+                .append(" adminWeight: ").append(this.adminWeight).toString();
+    }
+}
+
diff --git a/apps/optical/src/main/resources/demo-10-roadm-6-ps.json b/apps/optical/src/main/resources/demo-10-roadm-6-ps.json
new file mode 100644
index 0000000..e4e1122
--- /dev/null
+++ b/apps/optical/src/main/resources/demo-10-roadm-6-ps.json
@@ -0,0 +1,391 @@
+{
+        "opticalSwitches": [
+        {
+            "allowed": true,
+            "latitude": 37.6,
+            "longitude": 122.3,
+            "name": "SFO-W10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:01",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+        },
+        
+	{
+            "allowed": true,
+            "latitude": 37.3,
+            "longitude": 121.9,
+            "name": "SJC-W10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:02",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+         },
+
+ 	{
+            "allowed": true,
+            "latitude": 33.9,
+            "longitude": 118.4
+            "name": "LAX-W10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:03",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+         },
+
+	{
+            "allowed": true,
+            "latitude": 32.8,
+            "longitude": 117.1,
+            "name": "SDG-W10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:04",
+            "params": {
+                "numRegen": 3
+            },
+            "type": "Roadm"
+        },
+
+	{
+            "allowed": true,
+            "latitude": 44.8,
+            "longitude": 93.1,
+            "name": "MSP-M10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:05",
+            "params": {
+                "numRegen": 3
+            },
+            "type": "Roadm"
+         },
+
+	{
+            "allowed": true,
+            "latitude": 32.8,
+            "longitude": 97.1,
+            "name": "DFW-M10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:06",
+            "params": {
+                "numRegen": 3
+            },
+            "type": "Roadm"
+         },
+	
+	{
+            "allowed": true,
+            "latitude": 41.8,
+            "longitude": 120.1,
+            "name": "CHG-N10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:07",
+            "params": {
+                "numRegen": 3
+            },
+            "type": "Roadm"
+         },
+
+	{
+            "allowed": true,
+            "latitude": 38.8,
+            "longitude": 77.1,
+            "name": "IAD-M10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:08",
+            "params": {
+                "numRegen": 3
+            },
+            "type": "Roadm"
+        },
+
+	{
+            "allowed": true,
+            "latitude": 40.8,
+            "longitude": 73.1,
+            "name": "JFK-E10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:09",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+
+        },
+
+	{
+            "allowed": true,
+            "latitude": 33.8,
+            "longitude": 84.1,
+            "name": "ATL-S10",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:0A",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+        }
+	
+    ],
+
+        "opticalLinks": [
+        {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:01",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:02",
+            "params": {
+                "distKms": 1000,
+                "nodeName1": "SFO-W10",
+                "nodeName2": "SJC-W10",
+                "numWaves": 80,
+                "port1": 10,
+                "port2": 10
+            },
+            "type": "wdmLink"
+         },
+       
+       {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:02",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:03",
+            "params": {
+                "distKms": 1000,
+                "nodeName1": "SJC-W10",
+                "nodeName2": "LAX-W10",
+                "numWaves": 80,
+                "port1": 20,
+                "port2": 10
+            },
+            "type": "wdmLink"
+       },
+
+       {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:03",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:04",
+            "params": {
+                "distKms": 1000,
+                "nodeName1": "LAX-W10",
+                "nodeName2": "SDG-W10",
+                "numWaves": 80,
+                "port1": 30,
+                "port2": 10
+            },
+            "type": "wdmLink"
+        },
+
+        {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:02",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:05",
+            "params": {
+                "distKms": 4000,
+                "nodeName1": "SJC-W10",
+                "nodeName2": "MSP-M10",
+                "numWaves": 80,
+                "port1": 20,
+                "port2": 10
+            },
+            "type": "wdmLink"
+        },
+
+        {
+
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:03",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:06",
+            "params": {
+                "distKms": 5000,
+                "nodeName1": "LAX-W10",
+                "nodeName2": "DFW-M10",
+                "numWaves": 80,
+                "port1": 20,
+                "port2": 10
+            },
+            "type": "wdmLink"
+         },
+
+       {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:05",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:06",
+            "params": {
+                "distKms": 3000,
+                "nodeName1": "MSP-M10",
+                "nodeName2": "DFW-M10",
+                "numWaves": 80,
+                "port1": 30,
+                "port2": 20
+            },
+            "type": "wdmLink"
+        },
+
+        {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:05",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:07",
+            "params": {
+                "distKms": 3000,
+                "nodeName1": "MSP-M10",
+                "nodeName2": "CHG-N10",
+                "numWaves": 80,
+                "port1": 20,
+                "port2": 21
+            },
+            "type": "wdmLink"
+         },
+ 
+        {
+
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:06",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:08",
+            "params": {
+                "distKms": 4000,
+                "nodeName1": "DFW-M10",
+                "nodeName2": "IAD-M10",
+                "numWaves": 80,
+                "port1": 30,
+                "port2": 10
+            },
+            "type": "wdmLink"
+          },
+
+        {
+
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:07",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:08",
+            "params": {
+                "distKms": 4000,
+                "nodeName1": "CHG-M10",
+                "nodeName2": "IAD-M10",
+                "numWaves": 80,
+                "port1": 30,
+                "port2": 20
+            },
+            "type": "wdmLink"
+          },
+
+        {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:07",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:09",
+            "params": {
+                "distKms": 5000,
+                "nodeName1": "CHG-M10",
+                "nodeName2": "JFK-E10",
+                "numWaves": 80,
+                "port1": 20,
+                "port2": 10
+            },
+            "type": "wdmLink"
+         },
+
+      {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:08",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:0A",
+            "params": {
+                "distKms": 3000,
+                "nodeName1": "IAD-M10",
+                "nodeName2": "ATL-S10",
+                "numWaves": 80,
+                "port1": 30,
+                "port2": 10
+            },
+            "type": "wdmLink"
+      },
+
+      {
+
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:09",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:0A",
+            "params": {
+                "distKms": 4000,
+                "nodeName1": "JFK-E10",
+                "nodeName2": "ATL-S10",
+                "numWaves": 80,
+                "port1": 20,
+                "port2": 20
+            },
+            "type": "wdmLink"
+        },
+
+
+        {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:01",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:01",
+            "params": {
+                "nodeName1": "SFO-R10",
+                "nodeName2": "SFO-W10",
+                "port1": 10,
+                "port2": 1
+            },
+            "type": "pktOptLink"
+        },
+
+       {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:03",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:03",
+            "params": {
+                "nodeName1": "LAX-R10",
+                "nodeName2": "LAX-W10",
+                "port1": 10,
+                "port2": 1
+            },
+            "type": "pktOptLink"
+        },
+
+         {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:04",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:04",
+            "params": {
+                "nodeName1": "SDG-R10",
+                "nodeName2": "SDG-W10",
+                "port1": 10,
+                "port2": 1
+            },
+            "type": "pktOptLink"
+        },
+
+       {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:07",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:07",
+            "params": {
+                "nodeName1": "CHG-R10",
+                "nodeName2": "CHG-W10",
+                "port1": 10,
+                "port2": 1
+            },
+            "type": "pktOptLink"
+        },
+
+    {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:09",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:09",
+            "params": {
+                "nodeName1": "JFK-R10",
+                "nodeName2": "JFK-W10",
+                "port1": 10,
+                "port2": 1
+            },
+            "type": "pktOptLink"
+        },
+
+       {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:0A",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:0A",
+            "params": {
+                "nodeName1": "ATL-R10",
+                "nodeName2": "ATL-W10",
+                "port1": 10,
+                "port2": 1
+            },
+            "type": "pktOptLink"
+        },   
+
+    ]
+}
diff --git a/apps/optical/src/main/resources/demo-3-roadm-2-ps.json b/apps/optical/src/main/resources/demo-3-roadm-2-ps.json
new file mode 100644
index 0000000..6f2c2f5
--- /dev/null
+++ b/apps/optical/src/main/resources/demo-3-roadm-2-ps.json
@@ -0,0 +1,101 @@
+{
+        "opticalSwitches": [
+        {
+            "allowed": true,
+            "latitude": 37.6,
+            "longitude": 122.3,
+            "name": "ROADM1",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:01",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+        },
+
+	{
+            "allowed": true,
+            "latitude": 37.3,
+            "longitude": 121.9,
+            "name": "ROADM2",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:02",
+            "params": {
+                "numRegen": 0
+            },
+            "type": "Roadm"
+         },
+
+ 	{
+            "allowed": true,
+            "latitude": 33.9,
+            "longitude": 118.4,
+            "name": "ROADM3",
+            "nodeDpid": "00:00:ff:ff:ff:ff:ff:03",
+            "params": {
+                "numRegen": 2
+            },
+            "type": "Roadm"
+         }
+    ],
+
+        "opticalLinks": [
+        {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:01",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:03",
+            "params": {
+                "distKms": 1000,
+                "nodeName1": "ROADM1",
+                "nodeName2": "ROADM3",
+                "numWaves": 80,
+                "port1": 10,
+                "port2": 30
+            },
+            "type": "wdmLink"
+         },
+       
+       {
+	"allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:ff:03",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:02",
+            "params": {
+                "distKms": 2000,
+                "nodeName1": "ROADM3",
+                "nodeName2": "ROADM2",
+                "numWaves": 80,
+                "port1": 31,
+                "port2": 20
+            },
+            "type": "wdmLink"
+       },
+
+   
+      {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:01",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:01",
+            "params": {
+                "nodeName1": "ROUTER1",
+                "nodeName2": "ROADM1",
+                "bandWidth": 100000,
+                "port1": 10,
+                "port2": 11
+            },
+            "type": "pktOptLink"
+        },
+
+       {
+            "allowed": true,
+            "nodeDpid1": "00:00:ff:ff:ff:ff:00:02",
+            "nodeDpid2": "00:00:ff:ff:ff:ff:ff:02",
+            "params": {
+                "nodeName1": "ROUTER2",
+                "nodeName2": "ROADM2",
+                "bandWidth": 100000,
+                "port1": 10,
+                "port2": 21
+            },
+            "type": "pktOptLink"
+        } 
+
+    ]
+}