+ /* The IPv4/IPv6 DSCP field has two different views:
+ *
+ * - MFF_IP_DSCP has the DSCP in bits 2-7, their bit positions in the
+ * IPv4 and IPv6 "traffic class" field, as used in OpenFlow 1.0 and 1.1
+ * flow format and in NXM's NXM_OF_IP_TOS
+ *
+ * - MFF_IP_DSCP has the DSCP in bits 0-5, shifted right two bits from
+ * their positions in the IPv4 and IPv6 "traffic class" field, as used
+ * in OpenFlow 1.2+ OXM's OXM_OF_IP_DSCP. */