diff --git a/examples/mesh/ip_internal_network/main/Kconfig.projbuild b/examples/mesh/ip_internal_network/main/Kconfig.projbuild
index 28708ae787..89de1393e6 100644
--- a/examples/mesh/ip_internal_network/main/Kconfig.projbuild
+++ b/examples/mesh/ip_internal_network/main/Kconfig.projbuild
@@ -64,6 +64,12 @@ menu "Example Configuration"
         help
             The number of non-mesh stations allowed to connect in.
 
+    config MESH_IE_ENCRYPTED
+        bool "Mesh IE encrypted"
+        default y
+        help
+            The mesh IE is encrypted by default.
+
     config MESH_MAX_LAYER
         int "Mesh Max Layer"
         range 1 25
diff --git a/examples/mesh/ip_internal_network/main/mesh_main.c b/examples/mesh/ip_internal_network/main/mesh_main.c
index 9a56ed149d..856f8a870d 100644
--- a/examples/mesh/ip_internal_network/main/mesh_main.c
+++ b/examples/mesh/ip_internal_network/main/mesh_main.c
@@ -405,7 +405,12 @@ void app_main(void)
     ESP_ERROR_CHECK(esp_mesh_set_max_layer(CONFIG_MESH_MAX_LAYER));
     ESP_ERROR_CHECK(esp_mesh_set_vote_percentage(1));
     ESP_ERROR_CHECK(esp_mesh_set_ap_assoc_expire(10));
+    /* set blocking time of esp_mesh_send() to 30s, to prevent the esp_mesh_send() from permanently for some reason */
+    ESP_ERROR_CHECK(esp_mesh_send_block_time(30000));
     mesh_cfg_t cfg = MESH_INIT_CONFIG_DEFAULT();
+#if !MESH_IE_ENCRYPTED
+    cfg.crypto_funcs = NULL;
+#endif
     /* mesh ID */
     memcpy((uint8_t *) &cfg.mesh_id, MESH_ID, 6);
     /* router */