- ``RTE_FLOW_ITEM_TYPE_GRE_KEY`` works only when checksum and routing
bits in the GRE header are equal to 0.
+RTE flow action port_id support
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+- ``RTE_FLOW_ACTION_TYPE_PORT_ID`` is only supported between PF and its VFs.
+
Custom protocols supported in RTE Flow
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~