flags = format (flags, "N");
s = format (s, "%=12U%=16U%=6s%=20U%U",
format_vlib_time, vnm->vlib_main, e->time_last_updated,
format_ip4_address, &e->ip4_address,
flags ? (char *) flags : "",
flags = format (flags, "N");
s = format (s, "%=12U%=16U%=6s%=20U%U",
format_vlib_time, vnm->vlib_main, e->time_last_updated,
format_ip4_address, &e->ip4_address,
flags ? (char *) flags : "",