diff --git a/web/gui/src/main/webapp/app/fw/layer/panel.js b/web/gui/src/main/webapp/app/fw/layer/panel.js
index 1665626..4df0d72 100644
--- a/web/gui/src/main/webapp/app/fw/layer/panel.js
+++ b/web/gui/src/main/webapp/app/fw/layer/panel.js
@@ -75,7 +75,8 @@
                 append: appendPanel,
                 width: panelWidth,
                 height: panelHeight,
-                isVisible: panelIsVisible
+                isVisible: panelIsVisible,
+                el: panelEl
             };
 
         p.el = panelLayer.append('div')
@@ -136,6 +137,10 @@
             return p.on;
         }
 
+        function panelEl() {
+            return p.el;
+        }
+
         return api;
     }
 
diff --git a/web/gui/src/main/webapp/app/fw/svg/glyph.js b/web/gui/src/main/webapp/app/fw/svg/glyph.js
index ca046b5..af0ae38 100644
--- a/web/gui/src/main/webapp/app/fw/svg/glyph.js
+++ b/web/gui/src/main/webapp/app/fw/svg/glyph.js
@@ -218,8 +218,7 @@
         if (xns) {
             atr.transform = sus.translate(trans);
         }
-        elem.append('use').attr(atr).classed('overlay', ovr);
-
+        return elem.append('use').attr(atr).classed('overlay', ovr);
     }
 
     // ----------------------------------------------------------------------
diff --git a/web/gui/src/main/webapp/app/fw/svg/svgUtil.js b/web/gui/src/main/webapp/app/fw/svg/svgUtil.js
index 1f5adc0..735733e 100644
--- a/web/gui/src/main/webapp/app/fw/svg/svgUtil.js
+++ b/web/gui/src/main/webapp/app/fw/svg/svgUtil.js
@@ -143,11 +143,16 @@
                 return 'translate(' + x + ',' + y + ')';
             }
 
+            function stripPx(s) {
+                return s.replace(/px$/,'');
+            }
+
             return {
                 createDragBehavior: createDragBehavior,
                 loadGlow: loadGlow,
                 cat7: cat7,
-                translate: translate
+                translate: translate,
+                stripPx: stripPx
             };
         }]);
 }());
diff --git a/web/gui/src/main/webapp/app/index.html b/web/gui/src/main/webapp/app/index.html
index 738c967..4086ec0 100644
--- a/web/gui/src/main/webapp/app/index.html
+++ b/web/gui/src/main/webapp/app/index.html
@@ -78,6 +78,7 @@
     <script src="view/topo/topoEvent.js"></script>
     <script src="view/topo/topoForce.js"></script>
     <script src="view/topo/topoPanel.js"></script>
+    <script src="view/topo/topoInst.js"></script>
     <script src="view/device/device.js"></script>
     <!-- TODO: inject javascript refs server-side -->
 
diff --git a/web/gui/src/main/webapp/app/view/topo/topo.css b/web/gui/src/main/webapp/app/view/topo/topo.css
index d7e7ec3..c313d08 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.css
+++ b/web/gui/src/main/webapp/app/view/topo/topo.css
@@ -43,7 +43,7 @@
 }
 
 
-/* --- Topo Panels --- */
+/* --- Topo Summary Panel --- */
 
 #topo-p-summary {
     /* Base css from panel.css */
@@ -107,3 +107,78 @@
     background-color: #888;
     color: #888;
 }
+
+
+/* --- Topo Detail Panel --- */
+
+/* TODO: add CSS rules */
+
+
+/* --- Topo Instance Panel --- */
+
+#topo-p-instance {
+    height: 100px;
+}
+
+#topo-p-instance div.onosInst {
+    display: inline-block;
+    width: 170px;
+    height: 85px;
+    cursor: pointer;
+}
+
+#topo-p-instance svg rect {
+    fill: #ccc;
+    stroke: #aaa;
+    stroke-width: 3.5;
+}
+#topo-p-instance .online svg rect {
+    opacity: 1;
+    fill: #9cf;
+    stroke: #555;
+}
+
+#topo-p-instance svg .glyph {
+    fill: #888;
+    fill-rule: evenodd;
+}
+#topo-p-instance .online svg .glyph {
+    fill: #000;
+}
+
+#topo-p-instance svg .badgeIcon {
+    fill: #777;
+    fill-rule: evenodd;
+}
+
+#topo-p-instance .online svg .badgeIcon {
+    fill: #fff;
+}
+
+#topo-p-instance svg text {
+    text-anchor: middle;
+    fill: #777;
+}
+#topo-p-instance .online svg text {
+    fill: #eee;
+}
+
+#topo-p-instance svg text.instTitle {
+    font-size: 11pt;
+    font-weight: bold;
+}
+#topo-p-instance svg text.instLabel {
+    font-size: 9pt;
+    font-style: italic;
+}
+
+#topo-p-instance .onosInst.mastership {
+    opacity: 0.3;
+}
+#topo-p-instance .onosInst.mastership.affinity {
+    opacity: 1.0;
+}
+#topo-p-instance .onosInst.mastership.affinity svg rect {
+    /* TODO: add blue glow */
+    /*filter: url(#blue-glow);*/
+}
diff --git a/web/gui/src/main/webapp/app/view/topo/topo.js b/web/gui/src/main/webapp/app/view/topo/topo.js
index 4a8b208..c4a30b5 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.js
+++ b/web/gui/src/main/webapp/app/view/topo/topo.js
@@ -143,12 +143,13 @@
 
         .controller('OvTopoCtrl', [
             '$scope', '$log', '$location', '$timeout',
-            'FnService', 'MastService',
-            'KeyService', 'ZoomService', 'GlyphService', 'MapService',
+            'FnService', 'MastService', 'KeyService', 'ZoomService',
+            'GlyphService', 'MapService',
             'TopoEventService', 'TopoForceService', 'TopoPanelService',
+            'TopoInstService',
 
         function ($scope, _$log_, $loc, $timeout, _fs_, mast,
-                  _ks_, _zs_, _gs_, _ms_, tes, _tfs_, tps) {
+                  _ks_, _zs_, _gs_, _ms_, tes, _tfs_, tps, tis) {
             var self = this;
             $log = _$log_;
             fs = _fs_;
@@ -167,6 +168,7 @@
                 $log.log('OvTopoCtrl is saying Buh-Bye!');
                 tes.closeSock();
                 tps.destroyPanels();
+                tis.destroyInst();
             });
 
             // svg layer and initialization of components
@@ -181,6 +183,7 @@
             setUpMap();
             setUpForce();
 
+            tis.initInst();
             tps.initPanels();
             tes.openSock();
 
diff --git a/web/gui/src/main/webapp/app/view/topo/topoEvent.js b/web/gui/src/main/webapp/app/view/topo/topoEvent.js
index 009c048..fcff4e4 100644
--- a/web/gui/src/main/webapp/app/view/topo/topoEvent.js
+++ b/web/gui/src/main/webapp/app/view/topo/topoEvent.js
@@ -23,7 +23,7 @@
     'use strict';
 
     // injected refs
-    var $log, wss, wes, tps;
+    var $log, wss, wes, tps, tis;
 
     // internal state
     var wsock;
@@ -47,7 +47,8 @@
     }
 
     function addInstance(ev) {
-        $log.debug(' *** We got an ADD INSTANCE event: ', ev);
+        $log.debug('  **** Add Instance **** ', ev.payload);
+        tis.addInstance(ev.payload);
     }
 
     // ==========================
@@ -87,13 +88,14 @@
     angular.module('ovTopo')
     .factory('TopoEventService',
         ['$log', '$location', 'WebSocketService', 'WsEventService',
-            'TopoPanelService',
+            'TopoPanelService', 'TopoInstService',
 
-        function (_$log_, $loc, _wss_, _wes_, _tps_) {
+        function (_$log_, $loc, _wss_, _wes_, _tps_, _tis_) {
             $log = _$log_;
             wss = _wss_;
             wes = _wes_;
             tps = _tps_;
+            tis = _tis_;
 
             function bindDispatcher(TopoDomElementsPassedHere) {
                 // TODO: store refs to topo DOM elements...
diff --git a/web/gui/src/main/webapp/app/view/topo/topoInst.js b/web/gui/src/main/webapp/app/view/topo/topoInst.js
new file mode 100644
index 0000000..0d3a2ac
--- /dev/null
+++ b/web/gui/src/main/webapp/app/view/topo/topoInst.js
@@ -0,0 +1,304 @@
+/*
+ * Copyright 2015 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.
+ */
+
+/*
+ ONOS GUI -- Topology Instances Module.
+ Defines modeling of ONOS instances.
+ */
+
+(function () {
+    'use strict';
+
+    // injected refs
+    var $log, ps, sus, gs;
+
+    // configuration
+    var instCfg = {
+            rectPad: 8,
+            nodeOx: 9,
+            nodeOy: 9,
+            nodeDim: 40,
+            birdOx: 19,
+            birdOy: 21,
+            birdDim: 21,
+            uiDy: 45,
+            titleDy: 30,
+            textYOff: 20,
+            textYSpc: 15
+        },
+        showLogicErrors = true,
+        idIns = 'topo-p-instance',
+        instOpts = {
+            edge: 'left',
+            width: 20
+        };
+
+    // internal state
+    var onosInstances,
+        onosOrder,
+        oiShowMaster,
+        oiBox;
+
+
+    // ==========================
+    // *** ADD INSTANCE ***
+
+    function addInstance(data) {
+        var id = data.id;
+
+        if (onosInstances[id]) {
+            updateInstance(data);
+            return;
+        }
+        onosInstances[id] = data;
+        onosOrder.push(data);
+        updateInstances();
+    }
+
+    function updateInstance(data) {
+        var id = data.id,
+            d = onosInstances[id];
+        if (d) {
+            angular.extend(d, data);
+            updateInstances();
+        } else {
+            logicError('updateInstance: lookup fail: ID = "' + id + '"');
+        }
+    }
+
+    function computeDim(self) {
+        var css = window.getComputedStyle(self);
+        return {
+            w: sus.stripPx(css.width),
+            h: sus.stripPx(css.height)
+        };
+    }
+
+    function clickInst(d) {
+        var el = d3.select(this),
+            aff = el.classed('affinity');
+        if (!aff) {
+            setAffinity(el, d);
+        } else {
+            cancelAffinity();
+        }
+    }
+
+    function setAffinity(el, d) {
+        d3.selectAll('.onosInst')
+            .classed('mastership', true)
+            .classed('affinity', false);
+        el.classed('affinity', true);
+
+        // TODO: suppress the layers and highlight only specific nodes...
+        //suppressLayers(true);
+        //node.each(function (n) {
+        //    if (n.master === d.id) {
+        //        n.el.classed('suppressed', false);
+        //    }
+        //});
+        oiShowMaster = true;
+    }
+
+    function cancelAffinity() {
+        d3.selectAll('.onosInst')
+            .classed('mastership affinity', false);
+
+        // TODO: restore layer state
+        //restoreLayerState();
+        oiShowMaster = false;
+    }
+
+    function instRectAttr(dim) {
+        var pad = instCfg.rectPad;
+        return {
+            x: pad,
+            y: pad,
+            width: dim.w - pad*2,
+            height: dim.h - pad*2,
+            rx: 6
+        };
+    }
+
+    function viewBox(dim) {
+        return '0 0 ' + dim.w + ' ' + dim.h;
+    }
+
+    function attachUiBadge(svg) {
+        gs.addGlyph(svg, 'uiAttached', 30, true, [12, instCfg.uiDy])
+            .classed('badgeIcon uiBadge', true);
+    }
+
+    function instColor(id, online) {
+        // TODO: fix this..
+        //return cat7.get(id, !online, network.view.getTheme());
+        return 'blue';
+    }
+
+    // ==============================
+
+    function updateInstances() {
+        var onoses = oiBox.el().selectAll('.onosInst')
+                .data(onosOrder, function (d) { return d.id; }),
+            instDim = {w:0,h:0},
+            c = instCfg;
+
+        function nSw(n) {
+            return '# Switches: ' + n;
+        }
+
+        // operate on existing onos instances if necessary
+        onoses.each(function (d) {
+            var el = d3.select(this),
+                svg = el.select('svg');
+            instDim = computeDim(this);
+
+            // update online state
+            el.classed('online', d.online);
+
+            // update ui-attached state
+            svg.select('use.uiBadge').remove();
+            if (d.uiAttached) {
+                attachUiBadge(svg);
+            }
+
+            function updAttr(id, value) {
+                svg.select('text.instLabel.'+id).text(value);
+            }
+
+            updAttr('ip', d.ip);
+            updAttr('ns', nSw(d.switches));
+        });
+
+
+        // operate on new onos instances
+        var entering = onoses.enter()
+            .append('div')
+            .attr('class', 'onosInst')
+            .classed('online', function (d) { return d.online; })
+            .on('click', clickInst);
+
+        entering.each(function (d) {
+            var el = d3.select(this),
+                rectAttr,
+                svg;
+            instDim = computeDim(this);
+            rectAttr = instRectAttr(instDim);
+
+            svg = el.append('svg').attr({
+                width: instDim.w,
+                height: instDim.h,
+                viewBox: viewBox(instDim)
+            });
+
+            svg.append('rect').attr(rectAttr);
+
+            gs.addGlyph(svg, 'bird', 28, true, [14, 14])
+                .classed('badgeIcon', true);
+
+            if (d.uiAttached) {
+                attachUiBadge(svg);
+            }
+
+            var left = c.nodeOx + c.nodeDim,
+                len = rectAttr.width - left,
+                hlen = len / 2,
+                midline = hlen + left;
+
+            // title
+            svg.append('text')
+                .attr({
+                    class: 'instTitle',
+                    x: midline,
+                    y: c.titleDy
+                })
+                .text(d.id);
+
+            // a couple of attributes
+            var ty = c.titleDy + c.textYOff;
+
+            function addAttr(id, label) {
+                svg.append('text').attr({
+                    class: 'instLabel ' + id,
+                    x: midline,
+                    y: ty
+                }).text(label);
+                ty += c.textYSpc;
+            }
+
+            addAttr('ip', d.ip);
+            addAttr('ns', nSw(d.switches));
+        });
+
+        // operate on existing + new onoses here
+        // set the affinity colors...
+        onoses.each(function (d) {
+            var el = d3.select(this),
+                rect = el.select('svg').select('rect'),
+                col = instColor(d.id, d.online);
+            rect.style('fill', col);
+        });
+
+        // adjust the panel size appropriately...
+        oiBox.width(instDim.w * onosOrder.length);
+        oiBox.height(instDim.h);
+
+        // remove any outgoing instances
+        onoses.exit().remove();
+    }
+
+
+    // ==========================
+
+    function logicError(msg) {
+        if (showLogicErrors) {
+            $log.warn('TopoInstService: ' + msg);
+        }
+    }
+
+    function initInst() {
+        oiBox = ps.createPanel(idIns, instOpts);
+        oiBox.show();
+
+        onosInstances = {};
+        onosOrder = [];
+        oiShowMaster = false;
+    }
+
+    function destroyInst() {
+        ps.destroyPanel(idIns);
+        oiBox = null;
+    }
+
+    // ==========================
+
+    angular.module('ovTopo')
+    .factory('TopoInstService',
+        ['$log', 'PanelService', 'SvgUtilService', 'GlyphService',
+
+        function (_$log_, _ps_, _sus_, _gs_) {
+            $log = _$log_;
+            ps = _ps_;
+            sus = _sus_;
+            gs = _gs_;
+
+            return {
+                initInst: initInst,
+                destroyInst: destroyInst,
+                addInstance: addInstance
+            };
+        }]);
+}());
diff --git a/web/gui/src/main/webapp/app/view/topo/topoPanel.js b/web/gui/src/main/webapp/app/view/topo/topoPanel.js
index 51c0842..627a94e 100644
--- a/web/gui/src/main/webapp/app/view/topo/topoPanel.js
+++ b/web/gui/src/main/webapp/app/view/topo/topoPanel.js
@@ -28,43 +28,20 @@
     // constants
     var idSum = 'topo-p-summary',
         idDet = 'topo-p-detail',
-        idIns = 'topo-p-instance',
         panelOpts = {
             width: 260
         };
 
-    // internal state
-    var settings;
-
-
-    // SVG elements;
-    var fooPane;
-
-    // D3 selections;
+    // panels
     var summaryPanel,
-        detailPanel,
-        instancePanel;
-
-    // default settings for force layout
-    var defaultSettings = {
-        foo: 2
-    };
-
+        detailPanel;
 
     // ==========================
+    // *** SHOW SUMMARY ***
 
-    function addSep(tbody) {
-        tbody.append('tr').append('td').attr('colspan', 2).append('hr');
-    }
-
-    function addProp(tbody, label, value) {
-        var tr = tbody.append('tr');
-
-        function addCell(cls, txt) {
-            tr.append('td').attr('class', cls).text(txt);
-        }
-        addCell('label', label + ' :');
-        addCell('value', value);
+    function showSummary(data) {
+        populateSummary(data);
+        showSummaryPanel();
     }
 
     function populateSummary(data) {
@@ -89,9 +66,36 @@
         });
     }
 
+    function addSep(tbody) {
+        tbody.append('tr').append('td').attr('colspan', 2).append('hr');
+    }
+
+    function addProp(tbody, label, value) {
+        var tr = tbody.append('tr');
+
+        function addCell(cls, txt) {
+            tr.append('td').attr('class', cls).text(txt);
+        }
+        addCell('label', label + ' :');
+        addCell('value', value);
+    }
+
     function showSummaryPanel() {
         summaryPanel.show();
+        // TODO: augment, once we have the details pane also
+    }
 
+    // ==========================
+
+    function initPanels() {
+        summaryPanel = ps.createPanel(idSum, panelOpts);
+        detailPanel = ps.createPanel(idDet, panelOpts);
+    }
+
+    function destroyPanels() {
+        ps.destroyPanel(idSum);
+        ps.destroyPanel(idDet);
+        summaryPanel = detailPanel = null;
     }
 
     // ==========================
@@ -105,22 +109,6 @@
             ps = _ps_;
             gs = _gs_;
 
-            function initPanels() {
-                summaryPanel = ps.createPanel(idSum, panelOpts);
-                // TODO: set up detail and instance panels..
-            }
-
-            function destroyPanels() {
-                ps.destroyPanel(idSum);
-                summaryPanel = null;
-                // TODO: destroy detail and instance panels..
-            }
-
-            function showSummary(payload) {
-                populateSummary(payload);
-                showSummaryPanel();
-            }
-
             return {
                 initPanels: initPanels,
                 destroyPanels: destroyPanels,
diff --git a/web/gui/src/main/webapp/tests/app/fw/layer/panel-spec.js b/web/gui/src/main/webapp/tests/app/fw/layer/panel-spec.js
index 41a9ff9..64c54f1 100644
--- a/web/gui/src/main/webapp/tests/app/fw/layer/panel-spec.js
+++ b/web/gui/src/main/webapp/tests/app/fw/layer/panel-spec.js
@@ -84,6 +84,13 @@
         expect(el.style('width')).toEqual('200px');
     });
 
+    it('should provide an api of panel functions', function () {
+        var p = ps.createPanel('foo');
+        expect(fs.areFunctions(p, [
+            'show', 'hide', 'empty', 'append', 'width', 'height', 'isVisible', 'el'
+        ])).toBeTruthy();
+    });
+
     it('should complain when a duplicate ID is used', function () {
         spyOn($log, 'warn');
         var p = ps.createPanel('foo');
diff --git a/web/gui/src/main/webapp/tests/app/fw/svg/glyph-spec.js b/web/gui/src/main/webapp/tests/app/fw/svg/glyph-spec.js
index b72de5a..a7179e3 100644
--- a/web/gui/src/main/webapp/tests/app/fw/svg/glyph-spec.js
+++ b/web/gui/src/main/webapp/tests/app/fw/svg/glyph-spec.js
@@ -252,7 +252,7 @@
 
     it('should add a glyph with default size', function () {
         gs.init();
-        gs.addGlyph(svg, 'crown');
+        var retval = gs.addGlyph(svg, 'crown');
         var what = svg.selectAll('use');
         expect(what.size()).toEqual(1);
         expect(what.attr('width')).toEqual('40');
@@ -260,6 +260,10 @@
         expect(what.attr('xlink:href')).toEqual('#crown');
         expect(what.classed('glyph')).toBeTruthy();
         expect(what.classed('overlay')).toBeFalsy();
+
+        // check a couple on retval, which should be the same thing..
+        expect(retval.attr('xlink:href')).toEqual('#crown');
+        expect(retval.classed('glyph')).toBeTruthy();
     });
 
     it('should add a glyph with given size', function () {
diff --git a/web/gui/src/main/webapp/tests/app/fw/svg/svgUtil-spec.js b/web/gui/src/main/webapp/tests/app/fw/svg/svgUtil-spec.js
index 964320b..c294e2a 100644
--- a/web/gui/src/main/webapp/tests/app/fw/svg/svgUtil-spec.js
+++ b/web/gui/src/main/webapp/tests/app/fw/svg/svgUtil-spec.js
@@ -43,7 +43,13 @@
         ])).toBeTruthy();
     });
 
-    // TODO: add unit tests for drag behavior etc.
+
+    // TODO: add unit tests for drag behavior
+    // TODO: add unit tests for loadGlow
+    // TODO: add unit tests for cat7
+
+
+    // === translate()
 
     it('should translate from two args', function () {
         expect(sus.translate(1,2)).toEqual('translate(1,2)');
@@ -53,4 +59,14 @@
         expect(sus.translate([3,4])).toEqual('translate(3,4)');
     });
 
+
+    // === stripPx()
+
+    it('should not affect a number', function () {
+        expect(sus.stripPx('4')).toEqual('4');
+    });
+
+    it('should remove trailing px', function () {
+        expect(sus.stripPx('4px')).toEqual('4');
+    });
 });
diff --git a/web/gui/src/test/_karma/ev/migrate/ev_2_onos.json b/web/gui/src/test/_karma/ev/migrate/ev_2_onos.json
new file mode 100644
index 0000000..0579c1d
--- /dev/null
+++ b/web/gui/src/test/_karma/ev/migrate/ev_2_onos.json
@@ -0,0 +1,14 @@
+{
+  "event": "addInstance",
+  "payload": {
+    "id": "local",
+    "ip": "127.0.0.1",
+    "online": true,
+    "uiAttached": true,
+    "switches": 25,
+    "labels": [
+      "local",
+      "127.0.0.1"
+    ]
+  }
+}