IFBF_FLUSHDYN
req.ifbr_ifsflags = IFBF_FLUSHDYN;
bridge_rtdelete(sc, bif->bif_ifp, IFBF_FLUSHDYN);
bridge_rtdelete(sc, bif->bif_ifp, IFBF_FLUSHDYN);
bridge_rtdelete(sc, bif->bif_ifp, IFBF_FLUSHDYN);
bridge_rtflush(sc, IFBF_FLUSHDYN | IFBF_FLUSHSYNC);