+of flow records. When this option is enabled, a maximum of 508 ports are
+supported. By default, this behavior is disabled.
+
+The egress interface field normally contains the OpenFlow port number,
+however, certain port values have special meaning: 0xFFFF indicates
+flooding, 0xFFFE is multiple controller-specified output interfaces, and
+0xFFFD means that packets from the flow were dropped. If add-id-to-iface
+is enabled then these values become 0x1FF, 0x1FE, and 0x1FD respectively.