diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index ca8d4ea48a5d9fa641bf129a6fc5e3b428799fa4..736c11c6d266e1e8f9ae8a81826e1f04bd360ad2 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1070,6 +1070,9 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 	optlen = (skb_tail_pointer(skb) - skb_transport_header(skb)) -
 		sizeof(struct ra_msg);
 
+	ND_PRINTK(2, info,
+		  "RA: %s, dev: %s\n",
+		  __func__, skb->dev->name);
 	if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) {
 		ND_PRINTK(2, warn, "RA: source address is not link-local\n");
 		return;
@@ -1102,13 +1105,21 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 		return;
 	}
 
-	if (!ipv6_accept_ra(in6_dev))
+	if (!ipv6_accept_ra(in6_dev)) {
+		ND_PRINTK(2, info,
+			  "RA: %s, did not accept ra for dev: %s\n",
+			  __func__, skb->dev->name);
 		goto skip_linkparms;
+	}
 
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
 	/* skip link-specific parameters from interior routers */
-	if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+	if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) {
+		ND_PRINTK(2, info,
+			  "RA: %s, nodetype is NODEFAULT, dev: %s\n",
+			  __func__, skb->dev->name);
 		goto skip_linkparms;
+	}
 #endif
 
 	if (in6_dev->if_flags & IF_RS_SENT) {
@@ -1130,11 +1141,20 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 				(ra_msg->icmph.icmp6_addrconf_other ?
 					IF_RA_OTHERCONF : 0);
 
-	if (!in6_dev->cnf.accept_ra_defrtr)
+	if (!in6_dev->cnf.accept_ra_defrtr) {
+		ND_PRINTK(2, info,
+			  "RA: %s, defrtr is false for dev: %s\n",
+			  __func__, skb->dev->name);
 		goto skip_defrtr;
+	}
 
-	if (ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr, NULL, 0))
+	if (ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr,
+			  NULL, 0)) {
+		ND_PRINTK(2, info,
+			  "RA: %s, chk_addr failed for dev: %s\n",
+			  __func__, skb->dev->name);
 		goto skip_defrtr;
+	}
 
 	lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime);
 
@@ -1163,8 +1183,10 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 		rt = NULL;
 	}
 
+	ND_PRINTK(3, info, "RA: rt: %p  lifetime: %d, for dev: %s\n",
+		  rt, lifetime, skb->dev->name);
 	if (rt == NULL && lifetime) {
-		ND_PRINTK(3, dbg, "RA: adding default router\n");
+		ND_PRINTK(3, info, "RA: adding default router\n");
 
 		rt = rt6_add_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev, pref);
 		if (rt == NULL) {
@@ -1260,12 +1282,21 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 			     NEIGH_UPDATE_F_ISROUTER);
 	}
 
-	if (!ipv6_accept_ra(in6_dev))
+	if (!ipv6_accept_ra(in6_dev)) {
+		ND_PRINTK(2, info,
+			  "RA: %s, accept_ra is false for dev: %s\n",
+			  __func__, skb->dev->name);
 		goto out;
+	}
 
 #ifdef CONFIG_IPV6_ROUTE_INFO
-	if (ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr, NULL, 0))
+	if (ipv6_chk_addr(dev_net(in6_dev->dev), &ipv6_hdr(skb)->saddr,
+			  NULL, 0)) {
+		ND_PRINTK(2, info,
+			  "RA: %s, chk-addr (route info) is false for dev: %s\n",
+			  __func__, skb->dev->name);
 		goto skip_routeinfo;
+	}
 
 	if (in6_dev->cnf.accept_ra_rtr_pref && ndopts.nd_opts_ri) {
 		struct nd_opt_hdr *p;
@@ -1293,8 +1324,12 @@ static void ndisc_router_discovery(struct sk_buff *skb)
 
 #ifdef CONFIG_IPV6_NDISC_NODETYPE
 	/* skip link-specific ndopts from interior routers */
-	if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT)
+	if (skb->ndisc_nodetype == NDISC_NODETYPE_NODEFAULT) {
+		ND_PRINTK(2, info,
+			  "RA: %s, nodetype is NODEFAULT (interior routes), dev: %s\n",
+			  __func__, skb->dev->name);
 		goto out;
+	}
 #endif
 
 	if (in6_dev->cnf.accept_ra_pinfo && ndopts.nd_opts_pi) {