diff --git a/Makefile b/Makefile
index ea2f797c..b7488add 100644
--- a/Makefile
+++ b/Makefile
@@ -71,6 +71,19 @@ all: config.mk
 	for i in $(SUBDIRS); \
 	do echo; echo $$i; $(MAKE) $(MFLAGS) -C $$i; done
 
+help:
+	@echo "Make Targets:"
+	@echo " all                 - build binaries"
+	@echo " clean               - remove products of build"
+	@echo " distclean           - remove configuration and build"
+	@echo " install             - install binaries on local machine"
+	@echo " check               - run tests"
+	@echo " cscope              - build cscope database"
+	@echo " snapshot            - generate version number header"
+	@echo ""
+	@echo "Make Arguments:"
+	@echo " V=[0|1]             - set build verbosity level"
+
 config.mk:
 	sh configure $(KERNEL_INCLUDE)
 
@@ -106,6 +119,9 @@ clobber:
 
 distclean: clobber
 
+check:
+	cd testsuite && $(MAKE) && $(MAKE) alltests
+
 cscope:
 	cscope -b -q -R -Iinclude -sip -slib -smisc -snetem -stc
 
diff --git a/ip/iplink_vxlan.c b/ip/iplink_vxlan.c
index 2bc253fc..831f39a2 100644
--- a/ip/iplink_vxlan.c
+++ b/ip/iplink_vxlan.c
@@ -82,6 +82,7 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
 	__u64 attrs = 0;
 	bool set_op = (n->nlmsg_type == RTM_NEWLINK &&
 		       !(n->nlmsg_flags & NLM_F_CREATE));
+	bool selected_family = false;
 
 	saddr.family = daddr.family = AF_UNSPEC;
 
@@ -356,12 +357,26 @@ static int vxlan_parse_opt(struct link_util *lu, int argc, char **argv,
 		int type = (saddr.family == AF_INET) ? IFLA_VXLAN_LOCAL
 						     : IFLA_VXLAN_LOCAL6;
 		addattr_l(n, 1024, type, saddr.data, saddr.bytelen);
+		selected_family = true;
 	}
 
 	if (is_addrtype_inet(&daddr)) {
 		int type = (daddr.family == AF_INET) ? IFLA_VXLAN_GROUP
 						     : IFLA_VXLAN_GROUP6;
 		addattr_l(n, 1024, type, daddr.data, daddr.bytelen);
+		selected_family = true;
+	}
+
+	if (!selected_family) {
+		if (preferred_family == AF_INET) {
+			get_addr(&daddr, "default", AF_INET);
+			addattr_l(n, 1024, IFLA_VXLAN_GROUP,
+				  daddr.data, daddr.bytelen);
+		} else if (preferred_family == AF_INET6) {
+			get_addr(&daddr, "default", AF_INET6);
+			addattr_l(n, 1024, IFLA_VXLAN_GROUP6,
+				  daddr.data, daddr.bytelen);
+		}
 	}
 
 	if (!set_op || VXLAN_ATTRSET(attrs, IFLA_VXLAN_LEARNING))
diff --git a/ip/link_gre.c b/ip/link_gre.c
index ede761b2..1ee7ee13 100644
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -395,9 +395,9 @@ get_failed:
 	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
 	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
 	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
-	if (is_addrtype_inet(&saddr))
+	if (is_addrtype_inet_not_unspec(&saddr))
 		addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
-	if (is_addrtype_inet(&daddr))
+	if (is_addrtype_inet_not_unspec(&daddr))
 		addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
 	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
 	if (ignore_df)
diff --git a/ip/link_gre6.c b/ip/link_gre6.c
index 181b2eae..20f93059 100644
--- a/ip/link_gre6.c
+++ b/ip/link_gre6.c
@@ -424,9 +424,9 @@ get_failed:
 	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
 	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
 	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
-	if (is_addrtype_inet(&saddr))
+	if (is_addrtype_inet_not_unspec(&saddr))
 		addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
-	if (is_addrtype_inet(&daddr))
+	if (is_addrtype_inet_not_unspec(&daddr))
 		addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
 	if (link)
 		addattr32(n, 1024, IFLA_GRE_LINK, link);
diff --git a/ip/link_ip6tnl.c b/ip/link_ip6tnl.c
index c7fef2e0..cfe2c5aa 100644
--- a/ip/link_ip6tnl.c
+++ b/ip/link_ip6tnl.c
@@ -320,11 +320,11 @@ get_failed:
 		return 0;
 	}
 
-	if (is_addrtype_inet(&saddr)) {
+	if (is_addrtype_inet_not_unspec(&saddr)) {
 		addattr_l(n, 1024, IFLA_IPTUN_LOCAL,
 			  saddr.data, saddr.bytelen);
 	}
-	if (is_addrtype_inet(&daddr)) {
+	if (is_addrtype_inet_not_unspec(&daddr)) {
 		addattr_l(n, 1024, IFLA_IPTUN_REMOTE,
 			  daddr.data, daddr.bytelen);
 	}
diff --git a/ip/link_iptnl.c b/ip/link_iptnl.c
index 57f4d0c7..7ec1594d 100644
--- a/ip/link_iptnl.c
+++ b/ip/link_iptnl.c
@@ -325,11 +325,11 @@ get_failed:
 		return 0;
 	}
 
-	if (is_addrtype_inet(&saddr)) {
+	if (is_addrtype_inet_not_unspec(&saddr)) {
 		addattr_l(n, 1024, IFLA_IPTUN_LOCAL,
 			  saddr.data, saddr.bytelen);
 	}
-	if (is_addrtype_inet(&daddr)) {
+	if (is_addrtype_inet_not_unspec(&daddr)) {
 		addattr_l(n, 1024, IFLA_IPTUN_REMOTE,
 			  daddr.data, daddr.bytelen);
 	}
diff --git a/ip/link_vti.c b/ip/link_vti.c
index 6196a1c9..3fff4417 100644
--- a/ip/link_vti.c
+++ b/ip/link_vti.c
@@ -157,9 +157,9 @@ get_failed:
 
 	addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
 	addattr32(n, 1024, IFLA_VTI_OKEY, okey);
-	if (is_addrtype_inet(&saddr))
+	if (is_addrtype_inet_not_unspec(&saddr))
 		addattr_l(n, 1024, IFLA_VTI_LOCAL, saddr.data, saddr.bytelen);
-	if (is_addrtype_inet(&daddr))
+	if (is_addrtype_inet_not_unspec(&daddr))
 		addattr_l(n, 1024, IFLA_VTI_REMOTE, daddr.data, daddr.bytelen);
 	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
 	if (link)
diff --git a/ip/link_vti6.c b/ip/link_vti6.c
index 4263615b..f5a267a8 100644
--- a/ip/link_vti6.c
+++ b/ip/link_vti6.c
@@ -159,9 +159,9 @@ get_failed:
 
 	addattr32(n, 1024, IFLA_VTI_IKEY, ikey);
 	addattr32(n, 1024, IFLA_VTI_OKEY, okey);
-	if (is_addrtype_inet(&saddr))
+	if (is_addrtype_inet_not_unspec(&saddr))
 		addattr_l(n, 1024, IFLA_VTI_LOCAL, saddr.data, saddr.bytelen);
-	if (is_addrtype_inet(&daddr))
+	if (is_addrtype_inet_not_unspec(&daddr))
 		addattr_l(n, 1024, IFLA_VTI_REMOTE, daddr.data, daddr.bytelen);
 	addattr32(n, 1024, IFLA_VTI_FWMARK, fwmark);
 	if (link)
diff --git a/lib/libnetlink.c b/lib/libnetlink.c
index 58680929..f18dceac 100644
--- a/lib/libnetlink.c
+++ b/lib/libnetlink.c
@@ -666,17 +666,20 @@ static int __rtnl_talk_iov(struct rtnl_handle *rtnl, struct iovec *iov,
 				if (!err->error)
 					/* check messages from kernel */
 					nl_dump_ext_ack(h, errfn);
+				else {
+					errno = -err->error;
 
-				if (rtnl->proto != NETLINK_SOCK_DIAG &&
-				    show_rtnl_err)
-					rtnl_talk_error(h, err, errfn);
+					if (rtnl->proto != NETLINK_SOCK_DIAG &&
+					    show_rtnl_err)
+						rtnl_talk_error(h, err, errfn);
+				}
 
-				errno = -err->error;
 				if (answer)
 					*answer = (struct nlmsghdr *)buf;
 				else
 					free(buf);
-				return -i;
+
+				return err->error ? -i : 0;
 			}
 
 			if (answer) {
diff --git a/testsuite/Makefile b/testsuite/Makefile
index d1ac997d..b3aebec1 100644
--- a/testsuite/Makefile
+++ b/testsuite/Makefile
@@ -28,20 +28,24 @@ endif
 configure:
 	echo "Entering iproute2" && cd iproute2 && $(MAKE) configure && cd ..;
 
-compile: configure
+compile: configure generate_nlmsg
 	echo "Entering iproute2" && cd iproute2 && $(MAKE) && cd ..;
-	$(MAKE) -C tools
 
 listtests:
 	@for t in $(TESTS); do \
 		echo "$$t"; \
 	done
 
-alltests: $(TESTS)
+generate_nlmsg:
+	$(MAKE) -C tools
 
-clean:
+alltests: generate_nlmsg $(TESTS)
+
+testclean:
 	@echo "Removing $(RESULTS_DIR) dir ..."
 	@rm -rf $(RESULTS_DIR)
+
+clean: testclean
 	@rm -f iproute2/iproute2-this
 	@rm -f tests/ip/link/dev_wo_vf_rate.nl
 	$(MAKE) -C tools clean
@@ -49,18 +53,21 @@ clean:
 distclean: clean
 	echo "Entering iproute2" && cd iproute2 && $(MAKE) distclean && cd ..;
 
-$(TESTS): clean
+$(TESTS): testclean
+ifeq (,$(IPVERS))
+	$(error Please run make first)
+endif
 ifeq (,$(HAVE_UNSHARED_UTIL))
 	$(error Please install util-linux tools to run tests in separated network namespace)
 endif
 	@./tools/generate_nlmsg
 
 	@mkdir -p $(RESULTS_DIR)
-	
+
 	@for d in $(TESTS_DIR); do \
 	    mkdir -p $(RESULTS_DIR)/$$d; \
 	done
-	
+
 	@if [ "$(KCPATH)" = "/proc/config.gz" ]; then \
 		gunzip -c $(KCPATH) >$(KENVFN); \
 	elif [ "$(KCPATH)" != "" ]; then \
diff --git a/testsuite/tools/Makefile b/testsuite/tools/Makefile
index c936af71..7d53d226 100644
--- a/testsuite/tools/Makefile
+++ b/testsuite/tools/Makefile
@@ -2,7 +2,7 @@
 include ../../config.mk
 
 generate_nlmsg: generate_nlmsg.c ../../lib/libnetlink.c
-	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDLIBS) $(EXTRA_CFLAGS) -I../../include -include../../include/uapi/linux/netlink.h -o $@ $^
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDLIBS) $(EXTRA_CFLAGS) -I../../include -include../../include/uapi/linux/netlink.h -o $@ $^ -lmnl
 
 clean:
 	rm -f generate_nlmsg