diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
index eda5c5491f..37a692db54 100644
--- a/app/test-pmd/cmdline_flow.c
+++ b/app/test-pmd/cmdline_flow.c
@@ -181,6 +181,9 @@ enum index {
 	ITEM_ICMP6_ND_OPT_TLA_ETH_TLA,
 	ITEM_META,
 	ITEM_META_DATA,
+	ITEM_TAG,
+	ITEM_TAG_DATA,
+	ITEM_TAG_INDEX,
 
 	/* Validate/create actions. */
 	ACTIONS,
@@ -275,6 +278,10 @@ enum index {
 	ACTION_SET_META,
 	ACTION_SET_META_DATA,
 	ACTION_SET_META_MASK,
+	ACTION_SET_TAG,
+	ACTION_SET_TAG_INDEX,
+	ACTION_SET_TAG_DATA,
+	ACTION_SET_TAG_MASK,
 };
 
 /** Maximum size for pattern in struct rte_flow_item_raw. */
@@ -613,6 +620,7 @@ static const enum index next_item[] = {
 	ITEM_ICMP6_ND_OPT_SLA_ETH,
 	ITEM_ICMP6_ND_OPT_TLA_ETH,
 	ITEM_META,
+	ITEM_TAG,
 	ZERO,
 };
 
@@ -839,6 +847,13 @@ static const enum index item_meta[] = {
 	ZERO,
 };
 
+static const enum index item_tag[] = {
+	ITEM_TAG_DATA,
+	ITEM_TAG_INDEX,
+	ITEM_NEXT,
+	ZERO,
+};
+
 static const enum index next_action[] = {
 	ACTION_END,
 	ACTION_VOID,
@@ -889,6 +904,7 @@ static const enum index next_action[] = {
 	ACTION_SET_MAC_SRC,
 	ACTION_SET_MAC_DST,
 	ACTION_SET_META,
+	ACTION_SET_TAG,
 	ZERO,
 };
 
@@ -1058,6 +1074,14 @@ static const enum index action_set_meta[] = {
 	ZERO,
 };
 
+static const enum index action_set_tag[] = {
+	ACTION_SET_TAG_INDEX,
+	ACTION_SET_TAG_DATA,
+	ACTION_SET_TAG_MASK,
+	ACTION_NEXT,
+	ZERO,
+};
+
 static int parse_init(struct context *, const struct token *,
 		      const char *, unsigned int,
 		      void *, unsigned int);
@@ -2161,6 +2185,26 @@ static const struct token token_list[] = {
 		.args = ARGS(ARGS_ENTRY_MASK_HTON(struct rte_flow_item_meta,
 						  data, "\xff\xff\xff\xff")),
 	},
+	[ITEM_TAG] = {
+		.name = "tag",
+		.help = "match tag value",
+		.priv = PRIV_ITEM(TAG, sizeof(struct rte_flow_item_tag)),
+		.next = NEXT(item_tag),
+		.call = parse_vc,
+	},
+	[ITEM_TAG_DATA] = {
+		.name = "data",
+		.help = "tag value to match",
+		.next = NEXT(item_tag, NEXT_ENTRY(UNSIGNED), item_param),
+		.args = ARGS(ARGS_ENTRY_HTON(struct rte_flow_item_tag, data)),
+	},
+	[ITEM_TAG_INDEX] = {
+		.name = "index",
+		.help = "index of tag array to match",
+		.next = NEXT(item_tag, NEXT_ENTRY(UNSIGNED),
+			     NEXT_ENTRY(ITEM_PARAM_IS)),
+		.args = ARGS(ARGS_ENTRY(struct rte_flow_item_tag, index)),
+	},
 
 	/* Validate/create actions. */
 	[ACTIONS] = {
@@ -2889,6 +2933,37 @@ static const struct token token_list[] = {
 			     (struct rte_flow_action_set_meta, mask)),
 		.call = parse_vc_conf,
 	},
+	[ACTION_SET_TAG] = {
+		.name = "set_tag",
+		.help = "set tag",
+		.priv = PRIV_ACTION(SET_TAG,
+			sizeof(struct rte_flow_action_set_tag)),
+		.next = NEXT(action_set_tag),
+		.call = parse_vc,
+	},
+	[ACTION_SET_TAG_INDEX] = {
+		.name = "index",
+		.help = "index of tag array",
+		.next = NEXT(action_set_tag, NEXT_ENTRY(UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY(struct rte_flow_action_set_tag, index)),
+		.call = parse_vc_conf,
+	},
+	[ACTION_SET_TAG_DATA] = {
+		.name = "data",
+		.help = "tag value",
+		.next = NEXT(action_set_tag, NEXT_ENTRY(UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY_HTON
+			     (struct rte_flow_action_set_tag, data)),
+		.call = parse_vc_conf,
+	},
+	[ACTION_SET_TAG_MASK] = {
+		.name = "mask",
+		.help = "mask for tag value",
+		.next = NEXT(action_set_tag, NEXT_ENTRY(UNSIGNED)),
+		.args = ARGS(ARGS_ENTRY_HTON
+			     (struct rte_flow_action_set_tag, mask)),
+		.call = parse_vc_conf,
+	},
 };
 
 /** Remove and return last entry from argument stack. */
diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index 5092f0074e..7880425e9e 100644
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -684,6 +684,34 @@ action sets metadata for a packet and the metadata will be reported via
    | ``mask`` | ``data`` | bit-mask applies to "spec" and "last" |
    +----------+----------+---------------------------------------+
 
+Item: ``TAG``
+^^^^^^^^^^^^^
+
+Matches tag item set by other flows. Multiple tags are supported by specifying
+``index``.
+
+- Default ``mask`` matches the specified tag value and index.
+
+.. _table_rte_flow_item_tag:
+
+.. table:: TAG
+
+   +----------+----------+----------------------------------------+
+   | Field    | Subfield  | Value                                 |
+   +==========+===========+=======================================+
+   | ``spec`` | ``data``  | 32 bit flow tag value                 |
+   |          +-----------+---------------------------------------+
+   |          | ``index`` | index of flow tag                     |
+   +----------+-----------+---------------------------------------+
+   | ``last`` | ``data``  | upper range value                     |
+   |          +-----------+                                       |
+   |          | ``index`` |                                       |
+   +----------+-----------+---------------------------------------+
+   | ``mask`` | ``data``  | bit-mask applies to "spec" and "last" |
+   |          +-----------+                                       |
+   |          | ``index`` |                                       |
+   +----------+-----------+---------------------------------------+
+
 Data matching item types
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -2376,6 +2404,28 @@ the other path depending on HW capability.
    | ``mask`` | bit-mask applies to "data" |
    +----------+----------------------------+
 
+Action: ``SET_TAG``
+^^^^^^^^^^^^^^^^^^^
+
+Set Tag.
+
+Tag is a transient data used during flow matching. This is not delivered to
+application. Multiple tags are supported by specifying index.
+
+.. _table_rte_flow_action_set_tag:
+
+.. table:: SET_TAG
+
+   +-----------+----------------------------+
+   | Field     | Value                      |
+   +===========+============================+
+   | ``data``  | 32 bit tag value           |
+   +-----------+----------------------------+
+   | ``mask``  | bit-mask applies to "data" |
+   +-----------+----------------------------+
+   | ``index`` | index of tag to set        |
+   +-----------+----------------------------+
+
 Negative types
 ~~~~~~~~~~~~~~
 
diff --git a/doc/guides/rel_notes/release_19_08.rst b/doc/guides/rel_notes/release_19_08.rst
index e087266da0..7c9da3fdae 100644
--- a/doc/guides/rel_notes/release_19_08.rst
+++ b/doc/guides/rel_notes/release_19_08.rst
@@ -78,6 +78,10 @@ New Features
   * Rx metadata is delivered to host via ``metadata`` field of ``rte_mbuf``
     with PKT_RX_METADATA.
 
+* **Added flow tag in rte_flow.**
+  SET_TAG action and TAG item have been added to support transient flow
+  tag.
+
 * **Updated the bnxt PMD.**
 
   Updated the bnxt PMD. The major enhancements include:
diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
index cda8628183..ffb8a13098 100644
--- a/lib/librte_ethdev/rte_flow.h
+++ b/lib/librte_ethdev/rte_flow.h
@@ -422,6 +422,15 @@ enum rte_flow_item_type {
 	 * See struct rte_flow_item_meta.
 	 */
 	RTE_FLOW_ITEM_TYPE_META,
+
+	/**
+	 * [META]
+	 *
+	 * Matches a tag value.
+	 *
+	 * See struct rte_flow_item_tag.
+	 */
+	RTE_FLOW_ITEM_TYPE_TAG,
 };
 
 /**
@@ -1187,6 +1196,27 @@ static const struct rte_flow_item_meta rte_flow_item_meta_mask = {
 };
 #endif
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * RTE_FLOW_ITEM_TYPE_TAG
+ *
+ * Matches a specified tag value at the specified index.
+ */
+struct rte_flow_item_tag {
+	uint32_t data;
+	uint8_t index;
+};
+
+/** Default mask for RTE_FLOW_ITEM_TYPE_TAG. */
+#ifndef __cplusplus
+static const struct rte_flow_item_tag rte_flow_item_rx_meta_mask = {
+	.data = 0xffffffff,
+	.index = 0xff,
+};
+#endif
+
 /**
  * @warning
  * @b EXPERIMENTAL: this structure may change without prior notice
@@ -1665,6 +1695,15 @@ enum rte_flow_action_type {
 	 * See struct rte_flow_action_set_meta.
 	 */
 	RTE_FLOW_ACTION_TYPE_SET_META,
+
+	/**
+	 * Set Tag.
+	 *
+	 * Tag is not delivered to application.
+	 *
+	 * See struct rte_flow_action_set_tag.
+	 */
+	RTE_FLOW_ACTION_TYPE_SET_TAG,
 };
 
 /**
@@ -2168,6 +2207,21 @@ struct rte_flow_action_set_meta {
 	rte_be32_t mask;
 };
 
+/**
+ * @warning
+ * @b EXPERIMENTAL: this structure may change without prior notice
+ *
+ * RTE_FLOW_ACTION_TYPE_SET_TAG
+ *
+ * Set a tag which is a transient data used during flow matching. This is not
+ * delivered to application. Multiple tags are supported by specifying index.
+ */
+struct rte_flow_action_set_tag {
+	uint32_t data;
+	uint32_t mask;
+	uint8_t index;
+};
+
 /*
  * Definition of a single action.
  *
