finished part of the hosts, topos and configuration next

src/network/switch/switch_buffer.h

@@ -90,6 +90,9 @@ protected:
 
                 case FlowPriority::ELEPHANT:
                         return PRI_ELE;
+
+                default:
+                        return PRI_CTRL;
                 }
 
                 return PRI_ELE; // defensive