AT_CHECK([[sed < stderr '
/vlog|INFO|opened log file/d
/reconnect|INFO|/d
-/dpif_linux|ERR|Generic Netlink family.*does not exist/d
-/dpif|WARN|failed to enumerate system datapaths: No such file or directory/d
/ofproto|INFO|using datapath ID/d
/ofproto|INFO|datapath ID changed to fedcba9876543210/d']])