diff --git a/src/vnet/crypto/crypto.c b/src/vnet/crypto/crypto.c
index 1caff71..288e227 100644
--- a/src/vnet/crypto/crypto.c
+++ b/src/vnet/crypto/crypto.c
@@ -61,7 +61,6 @@
   return rv;
 }
 
-
 static_always_inline u32
 vnet_crypto_process_ops_inline (vlib_main_t * vm, vnet_crypto_op_t ops[],
 				vnet_crypto_op_chunk_t * chunks, u32 n_ops)
@@ -267,6 +266,44 @@
 }
 
 void
+vnet_crypto_register_async_handler (vlib_main_t * vm, u32 engine_index,
+				    vnet_crypto_async_op_id_t opt,
+				    vnet_crypto_frame_enqueue_t * enqueue_hdl,
+				    vnet_crypto_frame_dequeue_t * dequeue_hdl)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *ae, *e = vec_elt_at_index (cm->engines, engine_index);
+  vnet_crypto_async_op_data_t *otd = cm->async_opt_data + opt;
+  vec_validate_aligned (cm->enqueue_handlers, VNET_CRYPTO_ASYNC_OP_N_IDS - 1,
+			CLIB_CACHE_LINE_BYTES);
+  vec_validate_aligned (cm->dequeue_handlers, VNET_CRYPTO_ASYNC_OP_N_IDS - 1,
+			CLIB_CACHE_LINE_BYTES);
+
+  /* both enqueue hdl and dequeue hdl should present */
+  if (!enqueue_hdl && !dequeue_hdl)
+    return;
+
+  e->enqueue_handlers[opt] = enqueue_hdl;
+  e->dequeue_handlers[opt] = dequeue_hdl;
+  if (otd->active_engine_index_async == ~0)
+    {
+      otd->active_engine_index_async = engine_index;
+      cm->enqueue_handlers[opt] = enqueue_hdl;
+      cm->dequeue_handlers[opt] = dequeue_hdl;
+    }
+
+  ae = vec_elt_at_index (cm->engines, otd->active_engine_index_async);
+  if (ae->priority < e->priority)
+    {
+      otd->active_engine_index_async = engine_index;
+      cm->enqueue_handlers[opt] = enqueue_hdl;
+      cm->dequeue_handlers[opt] = dequeue_hdl;
+    }
+
+  return;
+}
+
+void
 vnet_crypto_register_key_handler (vlib_main_t * vm, u32 engine_index,
 				  vnet_crypto_key_handler_t * key_handler)
 {
@@ -318,10 +355,10 @@
 
   pool_get_zero (cm->keys, key);
   index = key - cm->keys;
+  key->type = VNET_CRYPTO_KEY_TYPE_DATA;
   key->alg = alg;
   vec_validate_aligned (key->data, length - 1, CLIB_CACHE_LINE_BYTES);
   clib_memcpy (key->data, data, length);
-
   /* *INDENT-OFF* */
   vec_foreach (engine, cm->engines)
     if (engine->key_op_handler)
@@ -343,11 +380,218 @@
       engine->key_op_handler (vm, VNET_CRYPTO_KEY_OP_DEL, index);
   /* *INDENT-ON* */
 
-  clib_memset (key->data, 0, vec_len (key->data));
-  vec_free (key->data);
+  if (key->type == VNET_CRYPTO_KEY_TYPE_DATA)
+    {
+      clib_memset (key->data, 0, vec_len (key->data));
+      vec_free (key->data);
+    }
+  else if (key->type == VNET_CRYPTO_KEY_TYPE_LINK)
+    {
+      key->index_crypto = key->index_integ = 0;
+    }
+
   pool_put (cm->keys, key);
 }
 
+vnet_crypto_async_alg_t
+vnet_crypto_link_algs (vnet_crypto_alg_t crypto_alg,
+		       vnet_crypto_alg_t integ_alg)
+{
+#define _(c, h, s, k ,d) \
+  if (crypto_alg == VNET_CRYPTO_ALG_##c && \
+      integ_alg == VNET_CRYPTO_ALG_HMAC_##h) \
+    return VNET_CRYPTO_ALG_##c##_##h##_TAG##d;
+  foreach_crypto_link_async_alg
+#undef _
+    return ~0;
+}
+
+u32
+vnet_crypto_key_add_linked (vlib_main_t * vm,
+			    vnet_crypto_key_index_t index_crypto,
+			    vnet_crypto_key_index_t index_integ)
+{
+  u32 index;
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *engine;
+  vnet_crypto_key_t *key_crypto, *key_integ, *key;
+  vnet_crypto_async_alg_t linked_alg;
+
+  key_crypto = pool_elt_at_index (cm->keys, index_crypto);
+  key_integ = pool_elt_at_index (cm->keys, index_integ);
+
+  if (!key_crypto || !key_integ)
+    return ~0;
+
+  linked_alg = vnet_crypto_link_algs (key_crypto->alg, key_integ->alg);
+  if (linked_alg == ~0)
+    return ~0;
+
+  pool_get_zero (cm->keys, key);
+  index = key - cm->keys;
+  key->type = VNET_CRYPTO_KEY_TYPE_LINK;
+  key->index_crypto = index_crypto;
+  key->index_integ = index_integ;
+  key->async_alg = linked_alg;
+
+  /* *INDENT-OFF* */
+  vec_foreach (engine, cm->engines)
+    if (engine->key_op_handler)
+      engine->key_op_handler (vm, VNET_CRYPTO_KEY_OP_ADD, index);
+  /* *INDENT-ON* */
+
+  return index;
+}
+
+clib_error_t *
+crypto_dispatch_enable_disable (int is_enable)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "crypto-dispatch");
+  vnet_crypto_main_t *cm = &crypto_main;
+  u32 skip_master = vlib_num_workers () > 0, i;
+  u32 state_change = 0;
+  vlib_node_state_t state;
+
+  if (is_enable && cm->async_refcnt > 0)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_POLLING;
+    }
+
+  if (!is_enable && cm->async_refcnt == 0)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_DISABLED;
+    }
+
+  if (state_change)
+    for (i = skip_master; i < tm->n_vlib_mains; i++)
+      vlib_node_set_state (vlib_mains[i], node->index, state);
+
+  return 0;
+}
+
+static_always_inline void
+crypto_set_active_async_engine (vnet_crypto_async_op_data_t * od,
+				vnet_crypto_async_op_id_t id, u32 ei)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_engine_t *ce = vec_elt_at_index (cm->engines, ei);
+
+  if (ce->enqueue_handlers[id] && ce->dequeue_handlers[id])
+    {
+      od->active_engine_index_async = ei;
+      cm->enqueue_handlers[id] = ce->enqueue_handlers[id];
+      cm->dequeue_handlers[id] = ce->dequeue_handlers[id];
+    }
+}
+
+int
+vnet_crypto_set_async_handler2 (char *alg_name, char *engine)
+{
+  uword *p;
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_alg_data_t *ad;
+  int i;
+
+  p = hash_get_mem (cm->async_alg_index_by_name, alg_name);
+  if (!p)
+    return -1;
+
+  ad = vec_elt_at_index (cm->async_algs, p[0]);
+
+  p = hash_get_mem (cm->engine_index_by_name, engine);
+  if (!p)
+    return -1;
+
+  for (i = 0; i < VNET_CRYPTO_ASYNC_OP_N_TYPES; i++)
+    {
+      vnet_crypto_async_op_data_t *od;
+      vnet_crypto_async_op_id_t id = ad->op_by_type[i];
+      if (id == 0)
+	continue;
+
+      od = cm->async_opt_data + id;
+      crypto_set_active_async_engine (od, id, p[0]);
+    }
+
+  return 0;
+}
+
+u32
+vnet_crypto_register_post_node (vlib_main_t * vm, char *post_node_name)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+  vnet_crypto_async_next_node_t *nn = 0;
+  vlib_node_t *cc, *pn;
+  uword index = vec_len (cm->next_nodes);
+
+  pn = vlib_get_node_by_name (vm, (u8 *) post_node_name);
+  if (!pn)
+    return ~0;
+
+  /* *INDENT-OFF* */
+  vec_foreach (cm->next_nodes, nn)
+  {
+    if (nn->node_idx == pn->index)
+      return nn->next_idx;
+  }
+  /* *INDENT-ON* */
+
+  vec_validate (cm->next_nodes, index);
+  nn = vec_elt_at_index (cm->next_nodes, index);
+
+  cc = vlib_get_node_by_name (vm, (u8 *) "crypto-dispatch");
+  nn->next_idx = vlib_node_add_named_next (vm, cc->index, post_node_name);
+  nn->node_idx = pn->index;
+
+  return nn->next_idx;
+}
+
+void
+vnet_crypto_request_async_mode (int is_enable)
+{
+  vlib_main_t *vm = vlib_get_main ();
+  vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "crypto-dispatch");
+  vnet_crypto_main_t *cm = &crypto_main;
+  u32 skip_master = vlib_num_workers () > 0, i;
+  u32 state_change = 0;
+  vlib_node_state_t state;
+
+  if (is_enable && cm->async_refcnt == 0)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_POLLING;
+    }
+
+  if (!is_enable && cm->async_refcnt == 1)
+    {
+      state_change = 1;
+      state = VLIB_NODE_STATE_DISABLED;
+    }
+
+  if (state_change)
+    for (i = skip_master; i < tm->n_vlib_mains; i++)
+      vlib_node_set_state (vlib_mains[i], node->index, state);
+
+  if (is_enable)
+    cm->async_refcnt += 1;
+  else if (cm->async_refcnt > 0)
+    cm->async_refcnt -= 1;
+}
+
+int
+vnet_crypto_is_set_async_handler (vnet_crypto_async_op_id_t op)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+
+  return (op < vec_len (cm->enqueue_handlers) &&
+	  NULL != cm->enqueue_handlers[op]);
+}
+
 static void
 vnet_crypto_init_cipher_data (vnet_crypto_alg_t alg, vnet_crypto_op_id_t eid,
 			      vnet_crypto_op_id_t did, char *name, u8 is_aead)
@@ -392,16 +636,44 @@
   hash_set_mem (cm->alg_index_by_name, name, alg);
 }
 
+static void
+vnet_crypto_init_async_data (vnet_crypto_async_alg_t alg,
+			     vnet_crypto_async_op_id_t eid,
+			     vnet_crypto_async_op_id_t did, char *name)
+{
+  vnet_crypto_main_t *cm = &crypto_main;
+
+  cm->async_algs[alg].name = name;
+  cm->async_algs[alg].op_by_type[VNET_CRYPTO_ASYNC_OP_TYPE_ENCRYPT] = eid;
+  cm->async_algs[alg].op_by_type[VNET_CRYPTO_ASYNC_OP_TYPE_DECRYPT] = did;
+  cm->async_opt_data[eid].type = VNET_CRYPTO_ASYNC_OP_TYPE_ENCRYPT;
+  cm->async_opt_data[eid].alg = alg;
+  cm->async_opt_data[eid].active_engine_index_async = ~0;
+  cm->async_opt_data[eid].active_engine_index_async = ~0;
+  cm->async_opt_data[did].type = VNET_CRYPTO_ASYNC_OP_TYPE_DECRYPT;
+  cm->async_opt_data[did].alg = alg;
+  cm->async_opt_data[did].active_engine_index_async = ~0;
+  cm->async_opt_data[did].active_engine_index_async = ~0;
+  hash_set_mem (cm->async_alg_index_by_name, name, alg);
+}
+
 clib_error_t *
 vnet_crypto_init (vlib_main_t * vm)
 {
   vnet_crypto_main_t *cm = &crypto_main;
   vlib_thread_main_t *tm = vlib_get_thread_main ();
+  vnet_crypto_thread_t *ct = 0;
   cm->engine_index_by_name = hash_create_string ( /* size */ 0,
 						 sizeof (uword));
   cm->alg_index_by_name = hash_create_string (0, sizeof (uword));
+  cm->async_alg_index_by_name = hash_create_string (0, sizeof (uword));
   vec_validate_aligned (cm->threads, tm->n_vlib_mains, CLIB_CACHE_LINE_BYTES);
+  vec_foreach (ct, cm->threads)
+    pool_alloc_aligned (ct->frame_pool, 256, CLIB_CACHE_LINE_BYTES);
   vec_validate (cm->algs, VNET_CRYPTO_N_ALGS);
+  vec_validate (cm->async_algs, VNET_CRYPTO_N_ASYNC_ALGS);
+  clib_bitmap_validate (cm->async_active_ids, VNET_CRYPTO_ASYNC_OP_N_IDS - 1);
+
 #define _(n, s, l) \
   vnet_crypto_init_cipher_data (VNET_CRYPTO_ALG_##n, \
 				VNET_CRYPTO_OP_##n##_ENC, \
@@ -419,7 +691,21 @@
 			      VNET_CRYPTO_OP_##n##_HMAC, "hmac-" s);
   foreach_crypto_hmac_alg;
 #undef _
-  return 0;
+#define _(n, s, k, t, a) \
+  vnet_crypto_init_async_data (VNET_CRYPTO_ALG_##n##_TAG##t##_AAD##a, \
+			       VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_ENC, \
+			       VNET_CRYPTO_OP_##n##_TAG##t##_AAD##a##_DEC, \
+			       s);
+  foreach_crypto_aead_async_alg
+#undef _
+#define _(c, h, s, k ,d) \
+  vnet_crypto_init_async_data (VNET_CRYPTO_ALG_##c##_##h##_TAG##d, \
+			       VNET_CRYPTO_OP_##c##_##h##_TAG##d##_ENC, \
+			       VNET_CRYPTO_OP_##c##_##h##_TAG##d##_DEC, \
+			       s);
+    foreach_crypto_link_async_alg
+#undef _
+    return 0;
 }
 
 VLIB_INIT_FUNCTION (vnet_crypto_init);