sys/net/if_lagg.c

750 		sc->sc_ifp->if_mtu = ifp->if_mtu;
751 	} else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
757 		oldmtu = ifp->if_mtu;
759 		ifr.ifr_mtu = sc->sc_ifp->if_mtu;
1576 		oldmtu = ifp->if_mtu;
1586 		if (ifp->if_mtu != oldmtu) {
1686 				    ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu);
1691 			ifp->if_mtu = ifr->ifr_mtu;
1694 			ifr->ifr_mtu = ifp->if_mtu;