Index: ip_carp.c
===================================================================
RCS file: /cvs/src/sys/netinet/ip_carp.c,v
retrieving revision 1.325
diff -u -p -r1.325 ip_carp.c
--- ip_carp.c	12 Jan 2018 00:36:13 -0000	1.325
+++ ip_carp.c	12 Jan 2018 13:13:41 -0000
@@ -450,7 +450,14 @@ carp_proto_input_if(struct ifnet *ifp, s
 	ismulti = IN_MULTICAST(ip->ip_dst.s_addr);
 
 	/* check if received on a valid carp interface */
-	if (ifp->if_type != IFT_CARP) {
+	switch (ifp->if_type) {
+	case IFT_CARP:
+		break;
+	case IFT_ETHER:
+		if (ismulti || !SRPL_EMPTY_LOCKED(&ifp->if_carp))
+			break;
+		/* FALLTHROUGH */
+	default:
 		carpstat_inc(carps_badif);
 		CARP_LOG(LOG_INFO, sc,
 		    ("packet received on non-carp interface: %s",