diff --git a/bpf/bpf_tun_rss_steering.c b/bpf/bpf_tun_rss_steering.c
index 36b80e1..c07166a 100644
--- a/bpf/bpf_tun_rss_steering.c
+++ b/bpf/bpf_tun_rss_steering.c
@@ -328,11 +328,11 @@ static inline void select_rss_queue(struct packet *packet, struct bpf_config *co
 		{
 			packet->src_addr_hash = crc32_hash(&packet->in4_src, 4, 0);
 			packet->dst_addr_hash = crc32_hash(&packet->in4_dst, 4, 0);
-			packet->last_hash = packet->src_addr_hash ^ packet->dst_addr_hash;
+			packet->last_hash = packet->src_addr_hash + packet->dst_addr_hash;
 
 			packet->src_port_hash = crc32_hash(&packet->src_port, 2, packet->last_hash);
 			packet->dst_port_hash = crc32_hash(&packet->dst_port, 2, packet->last_hash);
-			packet->last_hash = packet->src_port_hash ^ packet->dst_port_hash;
+			packet->last_hash = packet->src_port_hash + packet->dst_port_hash;
 
 			packet->select_queue = packet->last_hash % bpf_config_get_queue_num(config);
 		}
@@ -340,7 +340,7 @@ static inline void select_rss_queue(struct packet *packet, struct bpf_config *co
 		{
 			packet->src_addr_hash = crc32_hash(&packet->in4_src, 4, 0);
 			packet->dst_addr_hash = crc32_hash(&packet->in4_dst, 4, 0);
-			packet->last_hash = packet->src_addr_hash ^ packet->dst_addr_hash;
+			packet->last_hash = packet->src_addr_hash + packet->dst_addr_hash;
 
 			packet->select_queue = packet->last_hash % bpf_config_get_queue_num(config);
 		}
@@ -352,11 +352,11 @@ static inline void select_rss_queue(struct packet *packet, struct bpf_config *co
 		{
 			packet->src_addr_hash = crc32_hash(&packet->in6_src, 16, 0);
 			packet->dst_addr_hash = crc32_hash(&packet->in6_dst, 16, 0);
-			packet->last_hash = packet->src_addr_hash ^ packet->dst_addr_hash;
+			packet->last_hash = packet->src_addr_hash + packet->dst_addr_hash;
 
 			packet->src_port_hash = crc32_hash(&packet->src_port, 2, packet->last_hash);
 			packet->dst_port_hash = crc32_hash(&packet->dst_port, 2, packet->last_hash);
-			packet->last_hash = packet->src_port_hash ^ packet->dst_port_hash;
+			packet->last_hash = packet->src_port_hash + packet->dst_port_hash;
 
 			packet->select_queue = packet->last_hash % bpf_config_get_queue_num(config);
 		}
@@ -364,7 +364,7 @@ static inline void select_rss_queue(struct packet *packet, struct bpf_config *co
 		{
 			packet->src_addr_hash = crc32_hash(&packet->in6_src, 16, 0);
 			packet->dst_addr_hash = crc32_hash(&packet->in6_dst, 16, 0);
-			packet->last_hash = packet->src_addr_hash ^ packet->dst_addr_hash;
+			packet->last_hash = packet->src_addr_hash + packet->dst_addr_hash;
 
 			packet->select_queue = packet->last_hash % bpf_config_get_queue_num(config);
 		}
diff --git a/common/include/tfe_packet_io.h b/common/include/tfe_packet_io.h
index 848d098..76e9be4 100644
--- a/common/include/tfe_packet_io.h
+++ b/common/include/tfe_packet_io.h
@@ -80,6 +80,7 @@ struct session_ctx
 
 struct acceptor_kni_v4
 {
+    int debug;
     int firewall_sids;
     int proxy_sids;
     int sce_sids;
diff --git a/common/include/tfe_raw_packet.h b/common/include/tfe_raw_packet.h
index f88684c..69818b8 100644
--- a/common/include/tfe_raw_packet.h
+++ b/common/include/tfe_raw_packet.h
@@ -90,8 +90,10 @@ int raw_packet_parser_get_most_outer_tuple4(struct raw_pkt_parser *handler, stru
 int raw_packet_parser_get_most_inner_address(struct raw_pkt_parser *handler, struct addr_tuple4 *addr, void *logger);
 int raw_packet_parser_get_most_outer_address(struct raw_pkt_parser *handler, struct addr_tuple4 *addr, void *logger);
 
-uint64_t raw_packet_parser_get_hash_value(struct raw_pkt_parser *handler, enum ldbc_method method, int dir_is_internal, void *logger);
+uint16_t raw_packet_parser_get_most_inner_ipid(struct raw_pkt_parser *handler);
+uint16_t raw_packet_parser_get_most_outer_ipid(struct raw_pkt_parser *handler);
 
+uint64_t raw_packet_parser_get_hash_value(struct raw_pkt_parser *handler, enum ldbc_method method, int dir_is_internal, void *logger);
 
 int raw_traffic_decapsulate(struct raw_pkt_parser *handler, char *raw_data, int raw_len, char **output, int *out_len, int *is_ipv4);
 
diff --git a/common/src/tfe_packet_io.cpp b/common/src/tfe_packet_io.cpp
index 10f741f..98dfdf8 100644
--- a/common/src/tfe_packet_io.cpp
+++ b/common/src/tfe_packet_io.cpp
@@ -1536,6 +1536,22 @@ static int handle_raw_packet_from_nf(struct packet_io *handle, marsio_buff_t *rx
     if (node == NULL) {
         throughput_metrics_inc(&packet_io_fs->raw_pkt_rx, 1, raw_len);
         throughput_metrics_inc(&packet_io_fs->raw_bypass, 1, raw_len);
+
+        if (thread->ref_acceptor_ctx->debug)
+        {
+            struct addr_tuple4 inner_addr;
+            struct raw_pkt_parser raw_parser;
+            memset(&inner_addr, 0, sizeof(struct addr_tuple4));
+            raw_packet_parser_init(&raw_parser, 0, LAYER_TYPE_ALL, 8);
+            raw_packet_parser_parse(&raw_parser, (const void *)raw_data, raw_len, logger);
+            raw_packet_parser_get_most_inner_tuple4(&raw_parser, &inner_addr, logger);
+            uint16_t ipid = raw_packet_parser_get_most_inner_ipid(&raw_parser);
+
+            char *str = addr_tuple4_to_str(&inner_addr);
+            TFE_LOG_ERROR(logger, "packet from nf %lu: %s (ipid: %u) miss session table", meta.session_id, str, ipid);
+            free(str);
+        }
+
         marsio_send_burst(handle->dev_nf_interface.mr_path, thread_seq, &rx_buff, 1);
         return -1;
     }
@@ -1913,6 +1929,7 @@ int packet_io_polling_nf_interface(struct packet_io *handle, int thread_seq, voi
     {
         marsio_buff_t *rx_buff = rx_buffs[j];
         int raw_len = marsio_buff_datalen(rx_buff);
+        char *raw_data = marsio_buff_mtod(rx_buff);
 
         if (is_downstream_keepalive_packet(rx_buff))
         {
@@ -1926,6 +1943,21 @@ int packet_io_polling_nf_interface(struct packet_io *handle, int thread_seq, voi
             continue;
         }
 
+        if (thread->ref_acceptor_ctx->debug)
+        {
+            struct addr_tuple4 inner_addr;
+            struct raw_pkt_parser raw_parser;
+            memset(&inner_addr, 0, sizeof(struct addr_tuple4));
+            raw_packet_parser_init(&raw_parser, 0, LAYER_TYPE_ALL, 8);
+            raw_packet_parser_parse(&raw_parser, (const void *)raw_data, raw_len, thread->logger);
+            raw_packet_parser_get_most_inner_tuple4(&raw_parser, &inner_addr, thread->logger);
+            uint16_t ipid = raw_packet_parser_get_most_inner_ipid(&raw_parser);
+
+            char *str = addr_tuple4_to_str(&inner_addr);
+            TFE_LOG_DEBUG(thread->logger, "recv packet %s (ipid: %u)", str, ipid);
+            free(str);
+        }
+
         if (marsio_buff_is_ctrlbuf(rx_buff))
         {
             throughput_metrics_inc(&packet_io_fs->raw_pkt_rx, 1, raw_len);
@@ -2041,6 +2073,15 @@ void handle_raw_packet_from_tap(const char *data, int len, void *args)
     struct session_node *node = session_table_search_by_addr(thread->session_table, &inner_addr);
     if (node == NULL) {
         throughput_metrics_inc(&packet_io_fs->tap_pkt_rxdrop, 1, len);
+
+        if (thread->ref_acceptor_ctx->debug)
+        {
+            char *str = addr_tuple4_to_str(&inner_addr);
+            uint16_t ipid = raw_packet_parser_get_most_inner_ipid(&raw_parser);
+            TFE_LOG_ERROR(logger, "packet from tap %s (ipid: %u) miss session table", str, ipid);
+            free(str);
+        }
+
         return;
     }
 
diff --git a/common/src/tfe_raw_packet.cpp b/common/src/tfe_raw_packet.cpp
index 9efada2..07c0932 100644
--- a/common/src/tfe_raw_packet.cpp
+++ b/common/src/tfe_raw_packet.cpp
@@ -168,7 +168,7 @@ int raw_packet_parser_get_most_inner_tuple4(struct raw_pkt_parser *handler, stru
 
 // return  0 : success
 // return -1 : error
-int raw_packet_parser_get_most_outer_tuple4(struct raw_pkt_parser *handler, struct addr_tuple4 *addr, void  *logger)
+int raw_packet_parser_get_most_outer_tuple4(struct raw_pkt_parser *handler, struct addr_tuple4 *addr, void *logger)
 {
     const char *l3_layer_data = NULL;
     const char *l4_layer_data = NULL;
@@ -271,6 +271,64 @@ int raw_packet_parser_get_most_outer_address(struct raw_pkt_parser *handler, str
     return -1;
 }
 
+uint16_t raw_packet_parser_get_most_inner_ipid(struct raw_pkt_parser *handler)
+{
+    const char *l3_layer_data = NULL;
+    struct layer_results *results = &handler->results;
+
+    // search L3 layer in reverse order
+    for (int8_t i = results->layers_used - 1; i >= 0; i--)
+    {
+        const struct layer_result *layer = &results->layers[i];
+        enum layer_type type = layer->type;
+
+        if (type & LAYER_TYPE_L3)
+        {
+            l3_layer_data = (const char *)handler->ptr_pkt_start + layer->offset;
+            if (type == LAYER_TYPE_IPV4)
+            {
+                const struct ip *ipv4_hdr = (const struct ip *)l3_layer_data;
+                return ntohs(ipv4_hdr->ip_id);
+            }
+            else
+            {
+                return 0;
+            }
+        }
+    }
+
+    return 0;
+}
+
+uint16_t raw_packet_parser_get_most_outer_ipid(struct raw_pkt_parser *handler)
+{
+    const char *l3_layer_data = NULL;
+    struct layer_results *results = &handler->results;
+
+    // search L3 layer in order
+    for (int8_t i = 0; i <= results->layers_used - 1; i++)
+    {
+        const struct layer_result *layer = &results->layers[i];
+        enum layer_type type = layer->type;
+
+        if (type & LAYER_TYPE_L3)
+        {
+            l3_layer_data = (const char *)handler->ptr_pkt_start + layer->offset;
+            if (type == LAYER_TYPE_IPV4)
+            {
+                const struct ip *ipv4_hdr = (const struct ip *)l3_layer_data;
+                return ntohs(ipv4_hdr->ip_id);
+            }
+            else
+            {
+                return 0;
+            }
+        }
+    }
+
+    return -1;
+}
+
 uint64_t raw_packet_parser_get_hash_value(struct raw_pkt_parser *handler, enum ldbc_method method, int dir_is_internal, void *logger)
 {
     uint64_t temp = 0;
@@ -392,7 +450,7 @@ uint64_t raw_packet_parser_get_hash_value(struct raw_pkt_parser *handler, enum l
     char *inner_addr_str = addr_tuple4_to_str(&inner_addr);
     char *outer_addr_str = addr_tuple4_to_str(&outer_addr);
     TFE_LOG_DEBUG(logger, "%s: pkt_trace_id: %lu, outer_addr: %s, inner_addr: %s, is_internal: %d, hash_method: %s, hash_value: %lu",
-              LOG_TAG_RAWPKT, handler->pkt_trace_id, outer_addr_str, inner_addr_str, dir_is_internal, ldbc_method_to_string(method), hash_value);
+                  LOG_TAG_RAWPKT, handler->pkt_trace_id, outer_addr_str, inner_addr_str, dir_is_internal, ldbc_method_to_string(method), hash_value);
     free(inner_addr_str);
     free(outer_addr_str);
 
@@ -889,7 +947,7 @@ static const void *parse_vxlan(struct raw_pkt_parser *handler, const void *data,
         return data;
     }
 
-    //struct vxlan_hdr *vxlan_hdr = (struct vxlan_hdr *)data;
+    // struct vxlan_hdr *vxlan_hdr = (struct vxlan_hdr *)data;
     uint16_t hdr_len = sizeof(struct vxlan_hdr);
     const void *data_next_layer = (const char *)data + hdr_len;
     size_t data_next_length = length - hdr_len;
diff --git a/conf/tfe/tfe.conf b/conf/tfe/tfe.conf
index cac29ad..2e369c0 100644
--- a/conf/tfe/tfe.conf
+++ b/conf/tfe/tfe.conf
@@ -228,6 +228,7 @@ app_name="proxy_rule_hits"
 
 # for enable kni v4
 [packet_io]
+packet_io_debug=0
 packet_io_threads=8
 packet_io_cpu_affinity_mask=1-9
 
diff --git a/conf/tfe/zlog.conf b/conf/tfe/zlog.conf
index 5b95a46..eee4efe 100644
--- a/conf/tfe/zlog.conf
+++ b/conf/tfe/zlog.conf
@@ -2,7 +2,7 @@
 
 [global]
 
-default format = "%d(%c), %V, %F, %U, %m%n"
+default format = "%d(%c), %t, %V, %F, %U, %m%n"
 
 [levels]
 
diff --git a/platform/src/acceptor_kni_v4.cpp b/platform/src/acceptor_kni_v4.cpp
index c1b0055..f054262 100644
--- a/platform/src/acceptor_kni_v4.cpp
+++ b/platform/src/acceptor_kni_v4.cpp
@@ -85,6 +85,7 @@ struct acceptor_kni_v4 *acceptor_ctx_create(const char *profile, void *logger)
     MESA_load_profile_int_def(profile, "PACKET_IO", "firewall_sids", (int *)&(ctx->firewall_sids), 1000);
     MESA_load_profile_int_def(profile, "PACKET_IO", "proxy_sids", (int *)&(ctx->proxy_sids), 1001);
     MESA_load_profile_int_def(profile, "PACKET_IO", "service_chaining_sids", (int *)&(ctx->sce_sids), 1002);
+    MESA_load_profile_int_def(profile, "PACKET_IO", "packet_io_debug", (int *)&(ctx->debug), 0);
     MESA_load_profile_int_def(profile, "PACKET_IO", "packet_io_threads", (int *)&(ctx->nr_worker_threads), 8);
     MESA_load_profile_uint_range(profile, "PACKET_IO", "packet_io_cpu_affinity_mask", TFE_THREAD_MAX, (unsigned int *)ctx->cpu_affinity_mask);
     ctx->nr_worker_threads = MIN(ctx->nr_worker_threads, TFE_THREAD_MAX);