Changed trivial core behaviour to claim switch as a master by default and to apply role to the switch.
diff --git a/net/api/src/main/java/org/onlab/onos/net/EdgeLink.java b/net/api/src/main/java/org/onlab/onos/net/EdgeLink.java
new file mode 100644
index 0000000..356592d3
--- /dev/null
+++ b/net/api/src/main/java/org/onlab/onos/net/EdgeLink.java
@@ -0,0 +1,24 @@
+package org.onlab.onos.net;
+
+/**
+ * Abstraction of a link between an end-station host and the network
+ * infrastructure.
+ */
+public interface EdgeLink extends Link {
+
+ /**
+ * Returns the host identification.
+ *
+ * @return host identifier
+ */
+ HostId hostId();
+
+ /**
+ * Returns the connection point where the host attaches to the
+ * network infrastructure.
+ *
+ * @return host connection point
+ */
+ ConnectPoint connectPoint();
+
+}