diff --git a/examples/ipsec-secgw/Makefile b/examples/ipsec-secgw/Makefile
index 02d41e39a..3918ee63e 100644
--- a/examples/ipsec-secgw/Makefile
+++ b/examples/ipsec-secgw/Makefile
@@ -61,8 +61,8 @@ RTE_TARGET ?= x86_64-native-linuxapp-gcc
 include $(RTE_SDK)/mk/rte.vars.mk
 
 ifneq ($(MAKECMDGOALS),clean)
-ifneq ($(CONFIG_RTE_LIBRTE_SECURITY),y)
-$(error "RTE_LIBRTE_SECURITY is required to build ipsec-secgw")
+ifneq ($(CONFIG_RTE_LIBRTE_IPSEC),y)
+$(error "RTE_LIBRTE_IPSEC is required to build ipsec-secgw")
 endif
 endif
 
diff --git a/examples/ipsec-secgw/ipsec-secgw.c b/examples/ipsec-secgw/ipsec-secgw.c
index 58059316c..4b7309954 100644
--- a/examples/ipsec-secgw/ipsec-secgw.c
+++ b/examples/ipsec-secgw/ipsec-secgw.c
@@ -168,6 +168,9 @@ static uint32_t frame_size;
 static uint64_t dev_rx_offload = UINT64_MAX;
 static uint64_t dev_tx_offload = UINT64_MAX;
 
+/* application wide librte_ipsec/SA parameters */
+struct app_sa_prm app_sa_prm = {.enable = 0};
+
 struct lcore_rx_queue {
 	uint16_t port_id;
 	uint8_t queue_id;
@@ -1077,6 +1080,10 @@ print_usage(const char *prgname)
 		" [-P]"
 		" [-u PORTMASK]"
 		" [-j FRAMESIZE]"
+		" [-l]"
+		" [-w REPLAY_WINDOW_SIZE]"
+		" [-e]"
+		" [-a]"
 		" -f CONFIG_FILE"
 		" --config (port,queue,lcore)[,(port,queue,lcore)]"
 		" [--single-sa SAIDX]"
@@ -1089,6 +1096,11 @@ print_usage(const char *prgname)
 		"  -u PORTMASK: Hexadecimal bitmask of unprotected ports\n"
 		"  -j FRAMESIZE: Enable jumbo frame with 'FRAMESIZE' as maximum\n"
 		"                packet size\n"
+		"  -l enables code-path that uses librte_ipsec\n"
+		"  -w REPLAY_WINDOW_SIZE specifies IPsec SQN replay window\n"
+		"     size for each SA\n"
+		"  -e enables ESN\n"
+		"  -a enables SA SQN atomic behaviour\n"
 		"  -f CONFIG_FILE: Configuration file\n"
 		"  --config (port,queue,lcore): Rx queue configuration\n"
 		"  --single-sa SAIDX: Use single SA index for outbound traffic,\n"
@@ -1206,6 +1218,20 @@ parse_config(const char *q_arg)
 	return 0;
 }
 
+static void
+print_app_sa_prm(const struct app_sa_prm *prm)
+{
+	printf("librte_ipsec usage: %s\n",
+		(prm->enable == 0) ? "disabled" : "enabled");
+
+	if (prm->enable == 0)
+		return;
+
+	printf("replay window size: %u\n", prm->window_size);
+	printf("ESN: %s\n", (prm->enable_esn == 0) ? "disabled" : "enabled");
+	printf("SA flags: %#" PRIx64 "\n", prm->flags);
+}
+
 static int32_t
 parse_args(int32_t argc, char **argv)
 {
@@ -1217,7 +1243,7 @@ parse_args(int32_t argc, char **argv)
 
 	argvopt = argv;
 
-	while ((opt = getopt_long(argc, argvopt, "p:Pu:f:j:",
+	while ((opt = getopt_long(argc, argvopt, "aelp:Pu:f:j:w:",
 				lgopts, &option_index)) != EOF) {
 
 		switch (opt) {
@@ -1273,6 +1299,21 @@ parse_args(int32_t argc, char **argv)
 			}
 			printf("Enabled jumbo frames size %u\n", frame_size);
 			break;
+		case 'l':
+			app_sa_prm.enable = 1;
+			break;
+		case 'w':
+			app_sa_prm.enable = 1;
+			app_sa_prm.window_size = parse_decimal(optarg);
+			break;
+		case 'e':
+			app_sa_prm.enable = 1;
+			app_sa_prm.enable_esn = 1;
+			break;
+		case 'a':
+			app_sa_prm.enable = 1;
+			app_sa_prm.flags |= RTE_IPSEC_SAFLAG_SQN_ATOM;
+			break;
 		case CMD_LINE_OPT_CONFIG_NUM:
 			ret = parse_config(optarg);
 			if (ret) {
@@ -1335,6 +1376,8 @@ parse_args(int32_t argc, char **argv)
 		return -1;
 	}
 
+	print_app_sa_prm(&app_sa_prm);
+
 	if (optind >= 0)
 		argv[optind-1] = prgname;
 
@@ -2006,12 +2049,14 @@ main(int32_t argc, char **argv)
 		if (socket_ctx[socket_id].mbuf_pool)
 			continue;
 
-		sa_init(&socket_ctx[socket_id], socket_id);
-
+		/* initilaze SPD */
 		sp4_init(&socket_ctx[socket_id], socket_id);
 
 		sp6_init(&socket_ctx[socket_id], socket_id);
 
+		/* initilaze SAD */
+		sa_init(&socket_ctx[socket_id], socket_id);
+
 		rt_init(&socket_ctx[socket_id], socket_id);
 
 		pool_init(&socket_ctx[socket_id], socket_id, NB_MBUF);
diff --git a/examples/ipsec-secgw/ipsec.h b/examples/ipsec-secgw/ipsec.h
index 2f04b7d68..8da86c4de 100644
--- a/examples/ipsec-secgw/ipsec.h
+++ b/examples/ipsec-secgw/ipsec.h
@@ -11,6 +11,7 @@
 #include <rte_crypto.h>
 #include <rte_security.h>
 #include <rte_flow.h>
+#include <rte_ipsec.h>
 
 #define RTE_LOGTYPE_IPSEC       RTE_LOGTYPE_USER1
 #define RTE_LOGTYPE_IPSEC_ESP   RTE_LOGTYPE_USER2
@@ -70,7 +71,20 @@ struct ip_addr {
 
 #define MAX_KEY_SIZE		32
 
+/*
+ * application wide SA parameters
+ */
+struct app_sa_prm {
+	uint32_t enable; /* use librte_ipsec API for ipsec pkt processing */
+	uint32_t window_size; /* replay window size */
+	uint32_t enable_esn;  /* enable/disable ESN support */
+	uint64_t flags;       /* rte_ipsec_sa_prm.flags */
+};
+
+extern struct app_sa_prm app_sa_prm;
+
 struct ipsec_sa {
+	struct rte_ipsec_session ips; /* one session per sa for now */
 	uint32_t spi;
 	uint32_t cdev_id_qp;
 	uint64_t seq;
@@ -243,6 +257,16 @@ sp4_init(struct socket_ctx *ctx, int32_t socket_id);
 void
 sp6_init(struct socket_ctx *ctx, int32_t socket_id);
 
+/*
+ * Search through SP rules for given SPI.
+ * Returns first rule index if found(greater or equal then zero),
+ * or -ENOENT otherwise.
+ */
+int
+sp4_spi_present(uint32_t spi, int inbound);
+int
+sp6_spi_present(uint32_t spi, int inbound);
+
 void
 sa_init(struct socket_ctx *ctx, int32_t socket_id);
 
diff --git a/examples/ipsec-secgw/meson.build b/examples/ipsec-secgw/meson.build
index 77d8b298f..31f68fee2 100644
--- a/examples/ipsec-secgw/meson.build
+++ b/examples/ipsec-secgw/meson.build
@@ -6,7 +6,7 @@
 # To build this example as a standalone application with an already-installed
 # DPDK instance, use 'make'
 
-deps += ['security', 'lpm', 'acl', 'hash']
+deps += ['security', 'lpm', 'acl', 'hash', 'ipsec']
 allow_experimental_apis = true
 sources = files(
 	'esp.c', 'ipsec.c', 'ipsec-secgw.c', 'parser.c',
diff --git a/examples/ipsec-secgw/sa.c b/examples/ipsec-secgw/sa.c
index 839aaca0c..414fcd26c 100644
--- a/examples/ipsec-secgw/sa.c
+++ b/examples/ipsec-secgw/sa.c
@@ -19,6 +19,7 @@
 #include <rte_ip.h>
 #include <rte_random.h>
 #include <rte_ethdev.h>
+#include <rte_malloc.h>
 
 #include "ipsec.h"
 #include "esp.h"
@@ -694,6 +695,7 @@ print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
 }
 
 struct sa_ctx {
+	void *satbl; /* pointer to array of rte_ipsec_sa objects*/
 	struct ipsec_sa sa[IPSEC_SA_MAX_ENTRIES];
 	union {
 		struct {
@@ -764,7 +766,10 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 {
 	struct ipsec_sa *sa;
 	uint32_t i, idx;
-	uint16_t iv_length;
+	uint16_t iv_length, aad_length;
+
+	/* for ESN upper 32 bits of SQN also need to be part of AAD */
+	aad_length = (app_sa_prm.enable_esn != 0) ? sizeof(uint32_t) : 0;
 
 	for (i = 0; i < nb_entries; i++) {
 		idx = SPI2IDX(entries[i].spi);
@@ -808,7 +813,7 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 			sa_ctx->xf[idx].a.aead.iv.offset = IV_OFFSET;
 			sa_ctx->xf[idx].a.aead.iv.length = iv_length;
 			sa_ctx->xf[idx].a.aead.aad_length =
-				sa->aad_len;
+				sa->aad_len + aad_length;
 			sa_ctx->xf[idx].a.aead.digest_length =
 				sa->digest_len;
 
@@ -901,9 +906,205 @@ sa_in_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 	return sa_add_rules(sa_ctx, entries, nb_entries, 1);
 }
 
+/*
+ * helper function, fills parameters that are identical for all SAs
+ */
+static void
+fill_ipsec_app_sa_prm(struct rte_ipsec_sa_prm *prm,
+	const struct app_sa_prm *app_prm)
+{
+	memset(prm, 0, sizeof(*prm));
+
+	prm->flags = app_prm->flags;
+	prm->ipsec_xform.options.esn = app_prm->enable_esn;
+	prm->replay_win_sz = app_prm->window_size;
+}
+
+/*
+ * Helper function, tries to determine next_proto for SPI
+ * by searching though SP rules.
+ */
+static int
+get_spi_proto(uint32_t spi, enum rte_security_ipsec_sa_direction dir)
+{
+	int32_t rc4, rc6;
+
+	rc4 = sp4_spi_present(spi, dir == RTE_SECURITY_IPSEC_SA_DIR_INGRESS);
+	rc6 = sp6_spi_present(spi, dir == RTE_SECURITY_IPSEC_SA_DIR_INGRESS);
+
+	if (rc4 >= 0) {
+		if (rc6 >= 0) {
+			RTE_LOG(ERR, IPSEC,
+				"%s: SPI %u used simultaeously by "
+				"IPv4(%d) and IPv6 (%d) SP rules\n",
+				__func__, spi, rc4, rc6);
+			return -EINVAL;
+		} else
+			return IPPROTO_IPIP;
+	} else if (rc6 < 0) {
+		RTE_LOG(ERR, IPSEC,
+			"%s: SPI %u is not used by any SP rule\n",
+			__func__, spi);
+		return -EINVAL;
+	} else
+		return IPPROTO_IPV6;
+}
+
+static int
+fill_ipsec_sa_prm(struct rte_ipsec_sa_prm *prm, const struct ipsec_sa *ss,
+	const struct ipv4_hdr *v4, struct ipv6_hdr *v6)
+{
+	int32_t rc;
+
+	/*
+	 * Try to get SPI next proto by searching that SPI in SPD.
+	 * probably not the optimal way, but there seems nothing
+	 * better right now.
+	 */
+	rc = get_spi_proto(ss->spi, ss->direction);
+	if (rc < 0)
+		return rc;
+
+	fill_ipsec_app_sa_prm(prm, &app_sa_prm);
+	prm->userdata = (uintptr_t)ss;
+
+	/* setup ipsec xform */
+	prm->ipsec_xform.spi = ss->spi;
+	prm->ipsec_xform.salt = ss->salt;
+	prm->ipsec_xform.direction = ss->direction;
+	prm->ipsec_xform.proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP;
+	prm->ipsec_xform.mode = (ss->flags == TRANSPORT) ?
+		RTE_SECURITY_IPSEC_SA_MODE_TRANSPORT :
+		RTE_SECURITY_IPSEC_SA_MODE_TUNNEL;
+
+	if (ss->flags == IP4_TUNNEL) {
+		prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV4;
+		prm->tun.hdr_len = sizeof(*v4);
+		prm->tun.next_proto = rc;
+		prm->tun.hdr = v4;
+	} else if (ss->flags == IP6_TUNNEL) {
+		prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV6;
+		prm->tun.hdr_len = sizeof(*v6);
+		prm->tun.next_proto = rc;
+		prm->tun.hdr = v6;
+	} else {
+		/* transport mode */
+		prm->trs.proto = rc;
+	}
+
+	/* setup crypto section */
+	prm->crypto_xform = ss->xforms;
+	return 0;
+}
+
+static void
+fill_ipsec_session(struct rte_ipsec_session *ss, struct rte_ipsec_sa *sa,
+	const struct ipsec_sa *lsa)
+{
+	ss->sa = sa;
+	ss->type = lsa->type;
+
+	/* setup crypto section */
+	if (ss->type == RTE_SECURITY_ACTION_TYPE_NONE) {
+		ss->crypto.ses = lsa->crypto_session;
+	/* setup session action type */
+	} else {
+		ss->security.ses = lsa->sec_session;
+		ss->security.ctx = lsa->security_ctx;
+		ss->security.ol_flags = lsa->ol_flags;
+	}
+}
+
+/*
+ * Initialise related rte_ipsec_sa object.
+ */
+static int
+ipsec_sa_init(struct ipsec_sa *lsa, struct rte_ipsec_sa *sa, uint32_t sa_size)
+{
+	int rc;
+	struct rte_ipsec_sa_prm prm;
+	struct ipv4_hdr v4  = {
+		.version_ihl = IPVERSION << 4 |
+			sizeof(v4) / IPV4_IHL_MULTIPLIER,
+		.time_to_live = IPDEFTTL,
+		.next_proto_id = IPPROTO_ESP,
+		.src_addr = lsa->src.ip.ip4,
+		.dst_addr = lsa->dst.ip.ip4,
+	};
+	struct ipv6_hdr v6 = {
+		.vtc_flow = htonl(IP6_VERSION << 28),
+		.proto = IPPROTO_ESP,
+	};
+
+	if (lsa->flags == IP6_TUNNEL) {
+		memcpy(v6.src_addr, lsa->src.ip.ip6.ip6_b, sizeof(v6.src_addr));
+		memcpy(v6.dst_addr, lsa->dst.ip.ip6.ip6_b, sizeof(v6.dst_addr));
+	}
+
+	rc = fill_ipsec_sa_prm(&prm, lsa, &v4, &v6);
+	if (rc == 0)
+		rc = rte_ipsec_sa_init(sa, &prm, sa_size);
+	if (rc < 0)
+		return rc;
+
+	fill_ipsec_session(&lsa->ips, sa, lsa);
+	return 0;
+}
+
+/*
+ * Allocate space and init rte_ipsec_sa strcutures,
+ * one per session.
+ */
+static int
+ipsec_satbl_init(struct sa_ctx *ctx, const struct ipsec_sa *ent,
+	uint32_t nb_ent, int32_t socket)
+{
+	int32_t rc, sz;
+	uint32_t i, idx;
+	size_t tsz;
+	struct rte_ipsec_sa *sa;
+	struct ipsec_sa *lsa;
+	struct rte_ipsec_sa_prm prm;
+
+	/* determine SA size */
+	idx = SPI2IDX(ent[0].spi);
+	fill_ipsec_sa_prm(&prm, ctx->sa + idx, NULL, NULL);
+	sz = rte_ipsec_sa_size(&prm);
+	if (sz < 0) {
+		RTE_LOG(ERR, IPSEC, "%s(%p, %u, %d): "
+			"failed to determine SA size, error code: %d\n",
+			__func__, ctx, nb_ent, socket, sz);
+		return sz;
+	}
+
+	tsz = sz * nb_ent;
+
+	ctx->satbl = rte_zmalloc_socket(NULL, tsz, RTE_CACHE_LINE_SIZE, socket);
+	if (ctx->satbl == NULL) {
+		RTE_LOG(ERR, IPSEC,
+			"%s(%p, %u, %d): failed to allocate %zu bytes\n",
+			__func__,  ctx, nb_ent, socket, tsz);
+		return -ENOMEM;
+	}
+
+	rc = 0;
+	for (i = 0; i != nb_ent && rc == 0; i++) {
+
+		idx = SPI2IDX(ent[i].spi);
+
+		sa = (struct rte_ipsec_sa *)((uintptr_t)ctx->satbl + sz * i);
+		lsa = ctx->sa + idx;
+
+		rc = ipsec_sa_init(lsa, sa, sz);
+	}
+
+	return rc;
+}
+
 void
 sa_init(struct socket_ctx *ctx, int32_t socket_id)
 {
+	int32_t rc;
 	const char *name;
 
 	if (ctx == NULL)
@@ -926,6 +1127,14 @@ sa_init(struct socket_ctx *ctx, int32_t socket_id)
 				name, socket_id);
 
 		sa_in_add_rules(ctx->sa_in, sa_in, nb_sa_in);
+
+		if (app_sa_prm.enable != 0) {
+			rc = ipsec_satbl_init(ctx->sa_in, sa_in, nb_sa_in,
+				socket_id);
+			if (rc != 0)
+				rte_exit(EXIT_FAILURE,
+					"failed to init inbound SAs\n");
+		}
 	} else
 		RTE_LOG(WARNING, IPSEC, "No SA Inbound rule specified\n");
 
@@ -938,6 +1147,14 @@ sa_init(struct socket_ctx *ctx, int32_t socket_id)
 				name, socket_id);
 
 		sa_out_add_rules(ctx->sa_out, sa_out, nb_sa_out);
+
+		if (app_sa_prm.enable != 0) {
+			rc = ipsec_satbl_init(ctx->sa_out, sa_out, nb_sa_out,
+				socket_id);
+			if (rc != 0)
+				rte_exit(EXIT_FAILURE,
+					"failed to init outbound SAs\n");
+		}
 	} else
 		RTE_LOG(WARNING, IPSEC, "No SA Outbound rule "
 			"specified\n");
diff --git a/examples/ipsec-secgw/sp4.c b/examples/ipsec-secgw/sp4.c
index 6b05daaa9..d1dc64bad 100644
--- a/examples/ipsec-secgw/sp4.c
+++ b/examples/ipsec-secgw/sp4.c
@@ -504,3 +504,28 @@ sp4_init(struct socket_ctx *ctx, int32_t socket_id)
 		RTE_LOG(WARNING, IPSEC, "No IPv4 SP Outbound rule "
 			"specified\n");
 }
+
+/*
+ * Search though SP rules for given SPI.
+ */
+int
+sp4_spi_present(uint32_t spi, int inbound)
+{
+	uint32_t i, num;
+	const struct acl4_rules *acr;
+
+	if (inbound != 0) {
+		acr = acl4_rules_in;
+		num = nb_acl4_rules_in;
+	} else {
+		acr = acl4_rules_out;
+		num = nb_acl4_rules_out;
+	}
+
+	for (i = 0; i != num; i++) {
+		if (acr[i].data.userdata == PROTECT(spi))
+			return i;
+	}
+
+	return -ENOENT;
+}
diff --git a/examples/ipsec-secgw/sp6.c b/examples/ipsec-secgw/sp6.c
index dc5b94c6a..e67d85aaf 100644
--- a/examples/ipsec-secgw/sp6.c
+++ b/examples/ipsec-secgw/sp6.c
@@ -618,3 +618,28 @@ sp6_init(struct socket_ctx *ctx, int32_t socket_id)
 		RTE_LOG(WARNING, IPSEC, "No IPv6 SP Outbound rule "
 			"specified\n");
 }
+
+/*
+ * Search though SP rules for given SPI.
+ */
+int
+sp6_spi_present(uint32_t spi, int inbound)
+{
+	uint32_t i, num;
+	const struct acl6_rules *acr;
+
+	if (inbound != 0) {
+		acr = acl6_rules_in;
+		num = nb_acl6_rules_in;
+	} else {
+		acr = acl6_rules_out;
+		num = nb_acl6_rules_out;
+	}
+
+	for (i = 0; i != num; i++) {
+		if (acr[i].data.userdata == PROTECT(spi))
+			return i;
+	}
+
+	return -ENOENT;
+}
