diff --git a/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java b/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java
new file mode 100644
index 0000000..e6ee8e8
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/api/StaticPacketTrace.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.t3.api;
+
+/**
+ * Encapsulates the result of tracing a packet (traffic selector) through
+ * the current topology.
+ */
+public class StaticPacketTrace {
+
+}
diff --git a/src/main/java/org/onosproject/t3/api/TroubleshootService.java b/src/main/java/org/onosproject/t3/api/TroubleshootService.java
new file mode 100644
index 0000000..9b17382
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/api/TroubleshootService.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.t3.api;
+
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.flow.TrafficSelector;
+
+/**
+ * API for troubleshooting services, providing static analysis of installed
+ * flows and groups.
+ */
+public interface TroubleshootService {
+
+
+    /**
+     * Requests a static trace be performed for the given traffic selector
+     * starting at the given connect point.
+     *
+     * @param packet description of packet
+     * @param in point at which packet starts
+     * @return a trace result
+     */
+    StaticPacketTrace trace(TrafficSelector packet, ConnectPoint in);
+}
diff --git a/src/main/java/org/onosproject/t3/api/package-info.java b/src/main/java/org/onosproject/t3/api/package-info.java
new file mode 100644
index 0000000..152d568
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/api/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.
+ */
+
+/**
+ * Troubleshooting toolkit for trellis fabrics API.
+ */
+package org.onosproject.t3.api;
diff --git a/src/main/java/org/onosproject/t3/cli/package-info.java b/src/main/java/org/onosproject/t3/cli/package-info.java
new file mode 100644
index 0000000..b956df2
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/cli/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.
+ */
+
+/**
+ * Troubleshooting toolkit for trellis fabrics CLI.
+ */
+package org.onosproject.t3.cli;
diff --git a/src/main/java/org/onosproject/t3/impl/TroubleshootManager.java b/src/main/java/org/onosproject/t3/impl/TroubleshootManager.java
new file mode 100644
index 0000000..03f1e75
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/impl/TroubleshootManager.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.t3.impl;
+
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onosproject.net.ConnectPoint;
+import org.onosproject.net.flow.FlowRuleService;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.group.GroupService;
+import org.onosproject.t3.api.StaticPacketTrace;
+import org.onosproject.t3.api.TroubleshootService;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Designates ...
+ */
+@Service
+@Component(immediate = true)
+public class TroubleshootManager implements TroubleshootService {
+
+    private static final Logger log = getLogger(TroubleshootManager.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected FlowRuleService flowRuleService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected GroupService groupService;
+
+
+
+    @Override
+    public StaticPacketTrace trace(TrafficSelector packet, ConnectPoint in) {
+        return null;
+    }
+}
diff --git a/src/main/java/org/onosproject/t3/impl/package-info.java b/src/main/java/org/onosproject/t3/impl/package-info.java
new file mode 100644
index 0000000..dfcc294
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/impl/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.
+ */
+
+/**
+ * Troubleshooting toolkit for trellis fabrics implementation.
+ */
+package org.onosproject.t3.impl;
diff --git a/src/main/java/org/onosproject/t3/package-info.java b/src/main/java/org/onosproject/t3/package-info.java
new file mode 100644
index 0000000..2dae6e2
--- /dev/null
+++ b/src/main/java/org/onosproject/t3/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.
+ */
+
+/**
+ * Troubleshooting toolkit for trellis fabrics.
+ */
+package org.onosproject.t3;