diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
index 74ee03a..0536eef 100644
--- a/include/uapi/linux/if_bridge.h
+++ b/include/uapi/linux/if_bridge.h
@@ -144,7 +144,10 @@
  *     }
  * }
  * [MDBA_ROUTER] = {
- *    [MDBA_ROUTER_PORT]
+ *    [MDBA_ROUTER_PORT] = {
+ *        u32 ifindex
+ *        [MDBA_ROUTER_PATTR attributes]
+ *    }
  * }
  */
 enum {
@@ -192,6 +195,15 @@
 };
 #define MDBA_ROUTER_MAX (__MDBA_ROUTER_MAX - 1)
 
+/* router port attributes */
+enum {
+	MDBA_ROUTER_PATTR_UNSPEC,
+	MDBA_ROUTER_PATTR_TIMER,
+	MDBA_ROUTER_PATTR_TYPE,
+	__MDBA_ROUTER_PATTR_MAX
+};
+#define MDBA_ROUTER_PATTR_MAX (__MDBA_ROUTER_PATTR_MAX - 1)
+
 struct br_port_msg {
 	__u8  family;
 	__u32 ifindex;
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index 73786e2..253bc77 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -20,7 +20,7 @@
 {
 	struct net_bridge *br = netdev_priv(dev);
 	struct net_bridge_port *p;
-	struct nlattr *nest;
+	struct nlattr *nest, *port_nest;
 
 	if (!br->multicast_router || hlist_empty(&br->router_list))
 		return 0;
@@ -30,8 +30,20 @@
 		return -EMSGSIZE;
 
 	hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
-		if (p && nla_put_u32(skb, MDBA_ROUTER_PORT, p->dev->ifindex))
+		if (!p)
+			continue;
+		port_nest = nla_nest_start(skb, MDBA_ROUTER_PORT);
+		if (!port_nest)
 			goto fail;
+		if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
+		    nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
+				br_timer_value(&p->multicast_router_timer)) ||
+		    nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
+			       p->multicast_router)) {
+			nla_nest_cancel(skb, port_nest);
+			goto fail;
+		}
+		nla_nest_end(skb, port_nest);
 	}
 
 	nla_nest_end(skb, nest);