diff --git a/net/api/src/main/java/org/onlab/onos/net/link/LinkDescription.java b/net/api/src/main/java/org/onlab/onos/net/link/LinkDescription.java
new file mode 100644
index 0000000..8d712f0
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/link/LinkDescription.java
@@ -0,0 +1,17 @@
+package org.onlab.onos.net.link;
+
+/**
+ * Describes an infrastructure link.
+ */
+public interface LinkDescription {
+
+    // TODO: src, dst connection points, which are pairs of (DeviceId, PortNumber)
+
+//    On the north:
+//    Link = (ConnectPoint src, ConnectPoint dst);
+//    ConnectPoint = (DeviceId, PortNumber);
+
+//    On the south
+//    LinkDescription ~ Link
+
+}