diff --git a/sys/net/if_lagg.h b/sys/net/if_lagg.h
--- a/sys/net/if_lagg.h
+++ b/sys/net/if_lagg.h
@@ -258,13 +258,14 @@
 	int				flowid_shift;	/* shift the flowid */
 	struct lagg_counters		detached_counters; /* detached ports sum */
 	struct callout			sc_watchdog;	/* watchdog timer */
+#define	LAGG_ADDR_LEN \
+	MAX(INFINIBAND_ADDR_LEN, ETHER_ADDR_LEN)
+	uint8_t				sc_bcast_addr[LAGG_ADDR_LEN];
 };
 
 struct lagg_port {
 	struct ifnet			*lp_ifp;	/* physical interface */
 	struct lagg_softc		*lp_softc;	/* parent lagg */
-#define	LAGG_ADDR_LEN \
-	MAX(INFINIBAND_ADDR_LEN, ETHER_ADDR_LEN)
 	uint8_t				lp_lladdr[LAGG_ADDR_LEN];
 
 	u_char				lp_iftype;	/* interface type */
diff --git a/sys/net/if_lagg.c b/sys/net/if_lagg.c
--- a/sys/net/if_lagg.c
+++ b/sys/net/if_lagg.c
@@ -511,11 +511,6 @@
 	int if_type;
 	int error;
 	static const uint8_t eaddr[LAGG_ADDR_LEN];
-	static const uint8_t ib_bcast_addr[INFINIBAND_ADDR_LEN] = {
-		0x00, 0xff, 0xff, 0xff,
-		0xff, 0x12, 0x40, 0x1b,	0x00, 0x00, 0x00, 0x00,
-		0x00, 0x00, 0x00, 0x00,	0xff, 0xff, 0xff, 0xff
-	};
 
 	if (params != NULL) {
 		error = copyin(params, &iflp, sizeof(iflp));
@@ -603,7 +598,7 @@
 		ether_ifattach(ifp, eaddr);
 		break;
 	case IFT_INFINIBAND:
-		infiniband_ifattach(ifp, eaddr, ib_bcast_addr);
+		infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr);
 		break;
 	default:
 		break;
@@ -1239,8 +1234,11 @@
 		lp_ifp = lp->lp_ifp;
 
 		if (ifp != NULL && lp_ifp != NULL &&
-		    memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0) {
+		    (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 ||
+		     memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) {
 			memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen);
+			memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen);
+
 			CURVNET_SET(ifp->if_vnet);
 			EVENTHANDLER_INVOKE(iflladdr_event, ifp);
 			CURVNET_RESTORE();