V_geneve_cloner
if (V_geneve_cloner != NULL) {
ifc_detach_cloner(V_geneve_cloner);
V_geneve_cloner = NULL;
V_geneve_cloner = ifc_attach_cloner(geneve_name, (struct if_clone_addreq *)&req);
if (V_geneve_cloner != NULL)
ifc_detach_cloner(V_geneve_cloner);