diff --git a/ip/link_gre.c b/ip/link_gre.c
index e92b0d37..9109312b 100644
--- a/ip/link_gre.c
+++ b/ip/link_gre.c
@@ -41,12 +41,92 @@ static void usage(void)
 static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 			 struct nlmsghdr *n)
 {
+	struct {
+		struct nlmsghdr n;
+		struct ifinfomsg i;
+		char buf[1024];
+	} req;
+	struct ifinfomsg *ifi = (struct ifinfomsg *)(n + 1);
+	struct rtattr *tb[IFLA_MAX + 1];
+	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
+	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
 	__u16 iflags = 0;
 	__u16 oflags = 0;
 	unsigned ikey = 0;
 	unsigned okey = 0;
 	unsigned saddr = 0;
 	unsigned daddr = 0;
+	unsigned link = 0;
+	__u8 pmtudisc = 1;
+	__u8 ttl = 0;
+	__u8 tos = 0;
+	int len;
+
+	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
+		memset(&req, 0, sizeof(req));
+
+		req.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi));
+		req.n.nlmsg_flags = NLM_F_REQUEST;
+		req.n.nlmsg_type = RTM_GETLINK;
+		req.i.ifi_family = preferred_family;
+		req.i.ifi_index = ifi->ifi_index;
+
+		if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) {
+get_failed:
+			fprintf(stderr,
+				"Failed to get existing tunnel info.\n");
+			return -1;
+		}
+
+		len = req.n.nlmsg_len;
+		len -= NLMSG_LENGTH(sizeof(*ifi));
+		if (len < 0)
+			goto get_failed;
+
+		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(&req.i), len);
+
+		if (!tb[IFLA_LINKINFO])
+			goto get_failed;
+
+		parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
+
+		if (!linkinfo[IFLA_INFO_DATA])
+			goto get_failed;
+
+		parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
+				    linkinfo[IFLA_INFO_DATA]);
+
+		if (greinfo[IFLA_GRE_IKEY])
+			ikey = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_IKEY]);
+
+		if (greinfo[IFLA_GRE_OKEY])
+			okey = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_OKEY]);
+
+		if (greinfo[IFLA_GRE_IFLAGS])
+			iflags = *(__u16 *)RTA_DATA(greinfo[IFLA_GRE_IFLAGS]);
+
+		if (greinfo[IFLA_GRE_OFLAGS])
+			oflags = *(__u16 *)RTA_DATA(greinfo[IFLA_GRE_OFLAGS]);
+
+		if (greinfo[IFLA_GRE_LOCAL])
+			saddr = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_LOCAL]);
+
+		if (greinfo[IFLA_GRE_REMOTE])
+			daddr = *(__u32 *)RTA_DATA(greinfo[IFLA_GRE_REMOTE]);
+
+		if (greinfo[IFLA_GRE_PMTUDISC])
+			pmtudisc = *(__u8 *)RTA_DATA(
+				greinfo[IFLA_GRE_PMTUDISC]);
+
+		if (greinfo[IFLA_GRE_TTL])
+			ttl = *(__u8 *)RTA_DATA(greinfo[IFLA_GRE_TTL]);
+
+		if (greinfo[IFLA_GRE_TOS])
+			tos = *(__u8 *)RTA_DATA(greinfo[IFLA_GRE_TOS]);
+
+		if (greinfo[IFLA_GRE_LINK])
+			link = *(__u8 *)RTA_DATA(greinfo[IFLA_GRE_LINK]);
+	}
 
 	while (argc > 0) {
 		if (!matches(*argv, "key")) {
@@ -112,13 +192,9 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 		} else if (!matches(*argv, "ocsum")) {
 			oflags |= GRE_CSUM;
 		} else if (!matches(*argv, "nopmtudisc")) {
-			__u8 val = 0;
-
-			addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &val, 1);
+			pmtudisc = 0;
 		} else if (!matches(*argv, "pmtudisc")) {
-			__u8 val = 1;
-
-			addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &val, 1);
+			pmtudisc = 1;
 		} else if (!matches(*argv, "remote")) {
 			NEXT_ARG();
 			if (strcmp(*argv, "any"))
@@ -128,18 +204,13 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 			if (strcmp(*argv, "any"))
 				saddr = get_addr32(*argv);
 		} else if (!matches(*argv, "dev")) {
-			unsigned link;
-
 			NEXT_ARG();
 			link = tnl_ioctl_get_ifindex(*argv);
 			if (link == 0)
 				exit(-1);
-
-			addattr32(n, 1024, IFLA_GRE_LINK, link);
 		} else if (!matches(*argv, "ttl") ||
 			   !matches(*argv, "hoplimit")) {
 			unsigned uval;
-			__u8 ttl;
 
 			NEXT_ARG();
 			if (strcmp(*argv, "inherit") != 0) {
@@ -148,13 +219,11 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 				if (uval > 255)
 					invarg("TTL must be <= 255\n", *argv);
 				ttl = uval;
-				addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
 			}
 		} else if (!matches(*argv, "tos") ||
 			   !matches(*argv, "tclass") ||
 			   !matches(*argv, "dsfield")) {
 			__u32 uval;
-			__u8 tos;
 
 			NEXT_ARG();
 			if (strcmp(*argv, "inherit") != 0) {
@@ -163,7 +232,6 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 				tos = uval;
 			} else
 				tos = 1;
-			addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
 		} else 
 			usage();
 		argc--; argv++;
@@ -188,6 +256,11 @@ static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
 	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
 	addattr_l(n, 1024, IFLA_GRE_LOCAL, &saddr, 4);
 	addattr_l(n, 1024, IFLA_GRE_REMOTE, &daddr, 4);
+	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
+	if (link)
+		addattr32(n, 1024, IFLA_GRE_LINK, link);
+	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
+	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
 
 	return 0;
 }