diff --git a/apps/oecfg/src/main/java/org/onlab/onos/oecfg/OELinkConfig.java b/apps/oecfg/src/main/java/org/onlab/onos/oecfg/OELinkConfig.java
index 8a1c6fc..d844f62 100644
--- a/apps/oecfg/src/main/java/org/onlab/onos/oecfg/OELinkConfig.java
+++ b/apps/oecfg/src/main/java/org/onlab/onos/oecfg/OELinkConfig.java
@@ -51,8 +51,8 @@
     private JsonNode convert(InputStream input) throws IOException {
         JsonNode json = mapper.readTree(input);
         ObjectNode result = mapper.createObjectNode();
-        result.set("opticalSwitches", opticalSwitches(json));
-        result.set("opticalLinks", opticalLinks(json));
+        result.set("switchConfig", opticalSwitches(json));
+        result.set("linkConfig", opticalLinks(json));
         return result;
     }
 
diff --git a/tools/test/topos/oe-nonlinear-4.json b/tools/test/topos/oe-nonlinear-4.json
new file mode 100644
index 0000000..ac86a01
--- /dev/null
+++ b/tools/test/topos/oe-nonlinear-4.json
@@ -0,0 +1,51 @@
+{
+    "devices" : [
+        {
+            "uri": "of:0000ffffffffff01", "mac": "ffffffffffff01", "type": "ROADM",
+            "mfr": "Linc", "hw": "OE", "sw": "?", "serial": "?", "name": "ROADM1",
+            "annotations": { "latitude": 37.6, "longitude": 122.3, "optical.regens": 0 },
+            "ports": [ { "port": 10, "speed": 100000, "type": "FIBER" }, { "port": 20, "speed": 0, "type": "FIBER" }, { "port": 22, "speed": 0, "type": "FIBER" }]
+        },
+        {
+            "uri": "of:0000ffffffffff02", "mac": "ffffffffffff02", "type": "ROADM",
+            "mfr": "Linc", "hw": "OE", "sw": "?", "serial": "?", "name": "ROADM2",
+            "annotations": { "latitude": 37.3, "longitude": 121.9, "optical.regens": 0 },
+            "ports": [ { "port": 11, "speed": 100000, "type": "FIBER" }, { "port": 21, "speed": 0, "type": "FIBER" }, { "port": 22, "speed": 0, "type": "FIBER" }]
+        },
+        {
+            "uri": "of:0000ffffffffff03", "mac": "ffffffffffff03", "type": "ROADM",
+            "mfr": "Linc", "hw": "OE", "sw": "?", "serial": "?", "name": "ROADM3",
+            "annotations": { "latitude": 33.9, "longitude": 118.4, "optical.regens": 2 },
+            "ports": [ { "port": 30, "speed": 0, "type": "FIBER" }, { "port": 31, "speed": 0, "type": "FIBER" }]
+        },
+	{
+            "uri": "of:0000ffffffffff04", "mac": "ffffffffffff04", "type":"ROADM",
+            "mfr": "Linc", "hw": "OE", "sw": "?", "serial": "?", "name": "ROADM4",
+            "annotations": { "latitude": 39.9, "longitude": 119.4, "optical.regens": 2 },
+            "ports": [ { "port": 30, "speed": 0, "type": "FIBER" }, { "port": 31, "speed": 0, "type": "FIBER" }]
+        },
+        {
+            "uri": "of:0000ffffffff0001", "mac": "ffffffffff0001", "type": "SWITCH",
+            "mfr": "Linc", "hw": "PK", "sw": "?", "serial": "?", "name": "ROUTER1",
+            "annotations": { "latitude": 37.6, "longitude": 122.3 },
+            "ports": [ { "port": 1, "speed": 10000, "type": "COPPER" }, { "port": 2, "speed": 100000, "type": "FIBER" } ]
+        },
+        {
+            "uri": "of:0000ffffffff0002", "mac": "ffffffffff0002", "type": "SWITCH",
+            "mfr": "Linc", "hw": "PK", "sw": "?", "serial": "?", "name": "ROUTER2",
+            "annotations": { "latitude": 37.3, "longitude": 121.9 },
+            "ports": [ { "port": 1, "speed": 10000, "type": "COPPER" }, { "port": 2, "speed": 100000, "type": "FIBER" } ]
+        }
+    ],
+
+    "links" : [
+        { "src": "of:0000ffffffffff01/20", "dst": "of:0000ffffffffff03/30", "type": "OPTICAL", "annotations": { "optical.waves": 80, "optical.type": "WDM", "durable": "true" } },
+        { "src": "of:0000ffffffffff02/21", "dst": "of:0000ffffffffff03/31", "type": "OPTICAL", "annotations": { "optical.waves": 80, "optical.type": "WDM", "durable": "true" } },
+        { "src": "of:0000ffffffffff01/22", "dst": "of:0000ffffffffff04/30", "type": "OPTICAL", "annotations": { "optical.waves": 80, "optical.type": "WDM", "durable": "true" } },
+        { "src": "of:0000ffffffffff04/31", "dst": "of:0000ffffffffff02/22", "type": "OPTICAL", "annotations": { "optical.waves": 80, "optical.type": "WDM", "durable": "true" } },
+
+        { "src": "of:0000ffffffff0001/2", "dst": "of:0000ffffffffff01/10", "type": "OPTICAL", "annotations": { "bandwidth": 100000, "optical.type": "cross-connect", "durable": "true" } },
+        { "src": "of:0000ffffffff0002/2", "dst": "of:0000ffffffffff02/11", "type": "OPTICAL", "annotations": { "bandwidth": 100000, "optical.type": "cross-connect", "durable": "true" } }
+    ]
+
+}