diff --git a/README.md b/README.md
index b8524fdad..0ac74c350 100644
--- a/README.md
+++ b/README.md
@@ -153,7 +153,7 @@ $ make              # or "make -j" to speed up
 $ make install
 ```
 > Notes:
-> 1. Build dependencies may be needed, such as `pkg-config`(version 0.29.2+),`automake`, `libnl3`, `libnl-genl-3.0`, `openssl`, `popt` and `numactl`. You can install the missing dependencies by using the package manager of the system, e.g., `yum install popt-devel` (CentOS).
+> 1. Build dependencies may be needed, such as `pkg-config`(version 0.29.2+),`automake`, `libnl3`, `libnl-genl-3.0`, `openssl`, `popt` and `numactl`. You can install the missing dependencies by using the package manager of the system, e.g., `yum install popt-devel automake` (CentOS) or `apt install libpopt-dev autoconfig` (Ubuntu).
 > 2. Early `pkg-config` versions (v0.29.2 before) may cause dpvs build failure. If so, please upgrade this tool.
 
 Output files are installed to `dpvs/bin`.
diff --git a/include/conf/neigh.h b/include/conf/neigh.h
index 618cad2a7..bb70c7363 100644
--- a/include/conf/neigh.h
+++ b/include/conf/neigh.h
@@ -45,7 +45,7 @@ struct dp_vs_neigh_conf {
     char                    ifname[IFNAMSIZ];
     uint8_t                 flag;
     uint8_t                 cid;
-}__attribute__((__packed__));
+}__attribute__((__packed__, aligned(2)));
 
 struct dp_vs_neigh_conf_array {
     int  neigh_nums;
diff --git a/scripts/dpdk-build.sh b/scripts/dpdk-build.sh
index 9e7741292..8416120b0 100755
--- a/scripts/dpdk-build.sh
+++ b/scripts/dpdk-build.sh
@@ -106,5 +106,5 @@ echo -e "DPDK library installed successfully into directory: \033[32m$(pwd)/dpdk
 ## export dpdk lib
 echo -e "You can use this library in dpvs by running the command below:"
 echo -e "\033[32m"
-echo -e "export PKG_CONFIG_PATH=$(pwd)/dpdklib/lib64/pkgconfig"
+echo -e "export PKG_CONFIG_PATH=$(find $(pwd) -name pkgconfig)"
 echo -e "\033[0m"
diff --git a/src/Makefile b/src/Makefile
index 1ef63e5ea..64c9471b6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -50,6 +50,7 @@ CFLAGS += -Wall -Werror -Wstrict-prototypes -Wmissing-prototypes -mcmodel=medium
 ifeq ($(shell test $(GCC_VERSION) -ge 70 && echo 1), 1)
 	CFLAGS += -Wno-format-truncation
 	CFLAGS += -Wno-stringop-truncation
+	CFLAGS += -Wno-address-of-packed-member
 	CFLAGS += -Wstringop-overflow=0
 endif
 
diff --git a/tools/dpip/Makefile b/tools/dpip/Makefile
index 0b1a3a4a5..e1bbe21e4 100644
--- a/tools/dpip/Makefile
+++ b/tools/dpip/Makefile
@@ -23,6 +23,7 @@ TARGET = build/dpip
 
 CFLAGS = -g -O0
 CFLAGS += -Wall -Werror -Wstrict-prototypes -Wmissing-prototypes
+CFLAGS += -Wno-address-of-packed-member
 
 CFLAGS += -I ../../include
 CFLAGS += -I ../keepalived/keepalived/include
diff --git a/tools/dpip/ipset.c b/tools/dpip/ipset.c
index 26f2c831f..baeee9257 100644
--- a/tools/dpip/ipset.c
+++ b/tools/dpip/ipset.c
@@ -820,7 +820,7 @@ ipset_check(const struct dpip_obj *obj, dpip_cmd_t cmd)
 static void
 bitmap_dump_header(char *buf, struct ipset_info *info)
 {
-    char range[50];
+    char range[128];
     char addr[INET6_ADDRSTRLEN], addr2[INET6_ADDRSTRLEN];
 
     if (info->bitmap.cidr) {
diff --git a/tools/keepalived/keepalived/check/check_udp.c b/tools/keepalived/keepalived/check/check_udp.c
index 5f1f3c6f6..16a7ec336 100644
--- a/tools/keepalived/keepalived/check/check_udp.c
+++ b/tools/keepalived/keepalived/check/check_udp.c
@@ -312,7 +312,7 @@ udp_check_thread(thread_ref_t thread)
     if (recv_buf)
     	FREE(recv_buf);
 
-	return;
+	return 0;
 }
 
 static int
@@ -331,7 +331,7 @@ udp_connect_thread(thread_ref_t thread)
 	if (!checker->enabled) {
 		thread_add_timer(thread->master, udp_connect_thread, checker,
 				 checker->delay_loop);
-		return;
+		return 0;
 	}
 
 	if ((fd = socket(co->dst.ss_family, SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_UDP)) == -1) {
@@ -339,7 +339,7 @@ udp_connect_thread(thread_ref_t thread)
 		thread_add_timer(thread->master, udp_connect_thread, checker,
 				checker->delay_loop);
 
-		return;
+		return 0;
 	}
 
 	status = udp_bind_connect(fd, co, udp_check->payload, udp_check->payload_len);
@@ -350,7 +350,7 @@ udp_connect_thread(thread_ref_t thread)
 		udp_epilog(thread, false);
 	}
 
-	return;
+	return 0;
 }
 
 #ifdef THREAD_DUMP
diff --git a/tools/keepalived/keepalived/include/ip_vs.h b/tools/keepalived/keepalived/include/ip_vs.h
index e8a7e0bc2..90d8a6672 100644
--- a/tools/keepalived/keepalived/include/ip_vs.h
+++ b/tools/keepalived/keepalived/include/ip_vs.h
@@ -22,7 +22,7 @@
 //
 /////////////////////////////////////////////////////////////////////////////////////////
 
-#define IP_VS_VERSION_CODE              0x010808            /* DPVS v1.8.8 */
+#define IP_VS_VERSION_CODE              0x010902            /* DPVS v1.9.2 */
 #define NVERSION(version)               \
     (version >> 16) & 0xFF,             \
     (version >> 8) & 0xFF,              \
@@ -85,6 +85,19 @@
 #define IP_VS_SO_GET_LADDRS             (IP_VS_BASE_CTL+8)
 #define IP_VS_SO_GET_MAX                IP_VS_SO_GET_LADDRS
 
+/* Tunnel types */
+enum {
+    IP_VS_CONN_F_TUNNEL_TYPE_IPIP = 0,  /* IPIP */
+    IP_VS_CONN_F_TUNNEL_TYPE_GUE,       /* GUE */
+    IP_VS_CONN_F_TUNNEL_TYPE_GRE,       /* GRE */
+    IP_VS_CONN_F_TUNNEL_TYPE_MAX,
+};
+
+/* Tunnel encapsulation flags */
+#define IP_VS_TUNNEL_ENCAP_FLAG_NOCSUM  (0)
+#define IP_VS_TUNNEL_ENCAP_FLAG_CSUM    (1 << 0)
+#define IP_VS_TUNNEL_ENCAP_FLAG_REMCSUM (1 << 1)
+
 /*
  *    The struct ip_vs_service_user and struct ip_vs_dest_user are
  *    used to set IPVS rules through setsockopt.