diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2TrafficMessageHandler.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2TrafficMessageHandler.java
index ce7175b..687764d 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2TrafficMessageHandler.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Topo2TrafficMessageHandler.java
@@ -24,12 +24,16 @@
 import org.onosproject.ui.UiConnection;
 import org.onosproject.ui.UiMessageHandler;
 import org.onosproject.ui.impl.TrafficMonitorBase.Mode;
+import org.onosproject.ui.impl.UiWebSocket;
 import org.onosproject.ui.impl.topo.util.ServicesBundle;
+import org.onosproject.ui.model.topo.UiLinkId;
+import org.onosproject.ui.model.topo.UiSynthLink;
 import org.onosproject.ui.topo.Highlights;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.Collection;
+import java.util.Map;
 
 import static org.onosproject.ui.topo.TopoJson.topo2HighlightsMessage;
 
@@ -44,9 +48,6 @@
     private static final String REQUEST_ALL_TRAFFIC = "topo2RequestAllTraffic";
     private static final String CANCEL_TRAFFIC = "topo2CancelTraffic";
 
-    // === Outbound event identifiers
-    private static final String HIGHLIGHTS = "topo2Highlights";
-
     // field values
     private static final String TRAFFIC_TYPE = "trafficType";
     private static final String FLOW_STATS_BYTES = "flowStatsBytes";
@@ -56,13 +57,9 @@
     // configuration parameters
     private static final long TRAFFIC_PERIOD = 5000;
 
-//    private UiTopoSession topoSession;
-//    private Topo2Jsonifier t2json;
-
     protected ServicesBundle services;
-    private String version;
 
-
+    private UiTopoSession topoSession;
     private Traffic2Monitor traffic;
 
 
@@ -71,13 +68,8 @@
         super.init(connection, directory);
 
         services = new ServicesBundle(directory);
-
         traffic = new Traffic2Monitor(TRAFFIC_PERIOD, services, this);
-
-        // get the topo session from the UiWebSocket
-//        topoSession = ((UiWebSocket) connection).topoSession();
-//        t2json = new Topo2Jsonifier(directory, connection.userName());
-
+        topoSession = ((UiWebSocket) connection).topoSession();
     }
 
     @Override
@@ -104,6 +96,16 @@
         sendMessage(topo2HighlightsMessage(highlights));
     }
 
+    /**
+     * Asks the topo session for the relevant synth links for current region.
+     * The returned map is keyed by "original" link.
+     *
+     * @return synth link map
+     */
+    Map<UiLinkId, UiSynthLink> retrieveRelevantSynthLinks() {
+        return topoSession.relevantSynthLinks();
+    }
+
     // ==================================================================
 
     private final class Topo2AllTraffic extends RequestHandler {
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java
index 8f056fa..60e7e83 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/Traffic2Monitor.java
@@ -20,10 +20,15 @@
 import org.onosproject.ui.impl.TrafficMonitorBase;
 import org.onosproject.ui.impl.topo.util.ServicesBundle;
 import org.onosproject.ui.impl.topo.util.TrafficLink;
+import org.onosproject.ui.model.topo.UiLinkId;
+import org.onosproject.ui.model.topo.UiSynthLink;
 import org.onosproject.ui.topo.Highlights;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
 
 /**
@@ -95,9 +100,34 @@
 
     @Override
     protected Set<TrafficLink> doAggregation(Set<TrafficLink> linksWithTraffic) {
-        // TODO: figure out how to aggregate the link data...
         log.debug("Need to aggregate {} links", linksWithTraffic.size());
 
-        return linksWithTraffic;
+        // first, retrieve from the shared topology model those synth links that
+        // are part of the region currently being viewed by the user...
+        Map<UiLinkId, UiSynthLink> synthLinkMap =
+                msgHandler.retrieveRelevantSynthLinks();
+
+        // NOTE: compute Set<TrafficLink> which represents the consolidated links
+
+        Map<UiLinkId, TrafficLink> mappedByUiLinkId = new HashMap<>();
+
+        for (TrafficLink tl : linksWithTraffic) {
+            UiLinkId tlid = UiLinkId.uiLinkId(tl.key());
+            UiSynthLink sl = synthLinkMap.get(tlid);
+            if (sl != null) {
+                UiLinkId aggrid = sl.link().id();
+                TrafficLink aggregated = mappedByUiLinkId.get(aggrid);
+                if (aggregated == null) {
+                    aggregated = new TrafficLink(tl);
+                    mappedByUiLinkId.put(aggrid, aggregated);
+                } else {
+                    aggregated.mergeStats(tl);
+                }
+            }
+        }
+
+        Set<TrafficLink> result = new HashSet<>();
+        result.addAll(mappedByUiLinkId.values());
+        return result;
     }
 }
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java
index 3a3f141..2a02ffb 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/UiTopoSession.java
@@ -19,6 +19,7 @@
 import org.onosproject.net.region.RegionId;
 import org.onosproject.ui.UiTopoLayoutService;
 import org.onosproject.ui.impl.UiWebSocket;
+import org.onosproject.ui.model.topo.UiLinkId;
 import org.onosproject.ui.model.topo.UiModelEvent;
 import org.onosproject.ui.impl.topo.model.UiModelListener;
 import org.onosproject.ui.impl.topo.model.UiSharedTopologyModel;
@@ -33,6 +34,7 @@
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 
 /**
@@ -280,4 +282,14 @@
         UiTopoLayout layout = layoutService.getLayout(r);
         setCurrentLayout(layout);
     }
+
+    /**
+     * Returns synthetic links that are in the current region, mapped by
+     * original link ID.
+     *
+     * @return map of synth links
+     */
+    public Map<UiLinkId, UiSynthLink> relevantSynthLinks() {
+        return sharedModel.relevantSynthLinks(currentLayout.regionId());
+    }
 }
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/ModelCache.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/ModelCache.java
index ec07673..fa426e1 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/ModelCache.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/ModelCache.java
@@ -49,8 +49,10 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 
 import static org.onosproject.net.DefaultEdgeLink.createEdgeLink;
@@ -553,6 +555,14 @@
         return uiTopology.findSynthLinks(regionId);
     }
 
+    Map<UiLinkId, UiSynthLink> relevantSynthLinks(RegionId regionId) {
+        Map<UiLinkId, UiSynthLink> result = new HashMap<>();
+        for (UiSynthLink sl : getSynthLinks(regionId)) {
+            result.put(sl.original().id(), sl);
+        }
+        return result;
+    }
+
     /**
      * Refreshes the internal state.
      */
@@ -569,11 +579,6 @@
 
         services.region().getRegions().forEach(r -> {
             RegionId rid = r.id();
-
-//            BasicRegionConfig rcfg = cfgService.getConfig(rid, BasicRegionConfig.class);
-//            services.netcfg() ...
-            // TODO: figure out how to include peer-location data in UiRegion instance
-
             UiRegion region = uiTopology.findRegion(rid);
             if (region != null) {
                 reconcileDevicesAndHostsWithRegion(allDevices, allHosts, rid, region);
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/UiSharedTopologyModel.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/UiSharedTopologyModel.java
index 6500ae3..183ccd6 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/UiSharedTopologyModel.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/model/UiSharedTopologyModel.java
@@ -67,6 +67,7 @@
 import org.onosproject.ui.model.topo.UiDevice;
 import org.onosproject.ui.model.topo.UiDeviceLink;
 import org.onosproject.ui.model.topo.UiHost;
+import org.onosproject.ui.model.topo.UiLinkId;
 import org.onosproject.ui.model.topo.UiModelEvent;
 import org.onosproject.ui.model.topo.UiRegion;
 import org.onosproject.ui.model.topo.UiSynthLink;
@@ -74,6 +75,7 @@
 import org.slf4j.LoggerFactory;
 
 import java.util.List;
+import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ExecutorService;
 
@@ -302,6 +304,17 @@
         return cache.getSynthLinks(regionId);
     }
 
+    /**
+     * Returns the synthetic links associated with the specified region,
+     * mapped by original link id.
+     *
+     * @param regionId region ID
+     * @return map of synthetic links for that region
+     */
+    public Map<UiLinkId, UiSynthLink> relevantSynthLinks(RegionId regionId) {
+        return cache.relevantSynthLinks(regionId);
+    }
+
     // =====================================================================
 
 
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/topo/util/TrafficLink.java b/web/gui/src/main/java/org/onosproject/ui/impl/topo/util/TrafficLink.java
index 166a83a..f2643c6 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/topo/util/TrafficLink.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/topo/util/TrafficLink.java
@@ -29,6 +29,7 @@
 import java.util.HashSet;
 import java.util.Set;
 
+import static com.google.common.base.MoreObjects.toStringHelper;
 import static org.onosproject.ui.topo.LinkHighlight.Flavor.NO_HIGHLIGHT;
 import static org.onosproject.ui.topo.LinkHighlight.Flavor.PRIMARY_HIGHLIGHT;
 import static org.onosproject.ui.topo.LinkHighlight.Flavor.SECONDARY_HIGHLIGHT;
@@ -70,6 +71,91 @@
     }
 
     /**
+     * Copy constructor.
+     *
+     * @param copy the instance to copy
+     */
+    public TrafficLink(TrafficLink copy) {
+        super(copy.key(), copy.one());
+        setOther(copy.two());
+        bytes = copy.bytes;
+        rate = copy.rate;
+        flows = copy.flows;
+        taggedFlavor = copy.taggedFlavor;
+        hasTraffic = copy.hasTraffic;
+        isOptical = copy.isOptical;
+        antMarch = copy.antMarch;
+        mods.addAll(copy.mods);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        TrafficLink that = (TrafficLink) o;
+
+        return bytes == that.bytes && rate == that.rate &&
+                flows == that.flows && hasTraffic == that.hasTraffic &&
+                isOptical == that.isOptical && antMarch == that.antMarch &&
+                taggedFlavor == that.taggedFlavor && mods.equals(that.mods);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = (int) (bytes ^ (bytes >>> 32));
+        result = 31 * result + (int) (rate ^ (rate >>> 32));
+        result = 31 * result + (int) (flows ^ (flows >>> 32));
+        result = 31 * result + taggedFlavor.hashCode();
+        result = 31 * result + (hasTraffic ? 1 : 0);
+        result = 31 * result + (isOptical ? 1 : 0);
+        result = 31 * result + (antMarch ? 1 : 0);
+        result = 31 * result + mods.hashCode();
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("key", key())
+                .add("bytes", bytes)
+                .add("rate", rate)
+                .add("flows", flows)
+                .toString();
+    }
+
+    /**
+     * Returns the count of bytes.
+     *
+     * @return the byte count
+     */
+    public long bytes() {
+        return bytes;
+    }
+
+    /**
+     * Returns the rate.
+     *
+     * @return the rate
+     */
+    public long rate() {
+        return rate;
+    }
+
+    /**
+     * Returns the flows.
+     *
+     * @return flow count
+     */
+    public long flows() {
+        return flows;
+    }
+
+    /**
      * Sets the optical flag to the given value.
      *
      * @param b true if an optical link
@@ -149,6 +235,18 @@
         this.flows += count;
     }
 
+    /**
+     * Merges the load recorded on the given traffic link into this one.
+     *
+     * @param other the other traffic link
+     */
+    public void mergeStats(TrafficLink other) {
+        this.bytes += other.bytes;
+        this.rate += other.rate;
+        this.flows += other.flows;
+    }
+
+
     @Override
     public LinkHighlight highlight(Enum<?> type) {
         StatsType statsType = (StatsType) type;