diff -r 85554a6df744 sys/net/if_ethersubr.c
--- a/sys/net/if_ethersubr.c	Sat Jun 09 07:00:02 2018 -0700
+++ b/sys/net/if_ethersubr.c	Fri Aug 24 12:30:55 2018 -0700
@@ -461,7 +461,8 @@ ether_output_frame(struct ifnet *ifp, st
 	uint8_t pcp;
 
 	pcp = ifp->if_pcp;
-	if (pcp != IFNET_PCP_NONE && !ether_set_pcp(&m, ifp, pcp))
+	if (pcp != IFNET_PCP_NONE && ifp->if_type != IFT_L2VLAN &&
+	    !ether_set_pcp(&m, ifp, pcp))
 		return (0);
 
 	if (PFIL_HOOKED(&V_link_pfil_hook)) {