vn_muh
&vnic->vn_muh, vid, &mac_diag);
vnic->vn_muh = NULL;
if (vnic->vn_muh != NULL)
(void) mac_unicast_remove(vnic->vn_mch, vnic->vn_muh);
(void) mac_unicast_remove(vnic->vn_mch, vnic->vn_muh);