I’m trying to set up a new standalone Bro instance, but I seem to be experiencing regular packet loss. The host is processing minimal traffic – always <10Mbps, usually around 2Mbps – but I’ve noticed that the packet loss almost always occurs at time of log rotation.
Below is a quick sampling of the notice.log creation date (^#open), and all instances of packet loss, covering today thus far. Is it normal that Bro drops packets during log rotation? Is there some kind of tuning I can/should be doing to address this? Or is this just a red herring?
#open 2014-09-23-00-02-10
2014-09-23T00:02:09+0000 PacketFilter::Dropped_Packets 2866 packets dropped after filtering, 143726 received, 143726 on link
2014-09-23T00:12:09+0000 PacketFilter::Dropped_Packets 94 packets dropped after filtering, 145724 received, 145724 on link
#open 2014-09-23-01-02-10
2014-09-23T01:02:09+0000 PacketFilter::Dropped_Packets 2803 packets dropped after filtering, 152045 received, 152045 on link
#open 2014-09-23-02-02-10
2014-09-23T02:02:09+0000 PacketFilter::Dropped_Packets 2772 packets dropped after filtering, 145405 received, 145405 on link
#open 2014-09-23-03-02-10
2014-09-23T03:02:09+0000 PacketFilter::Dropped_Packets 3197 packets dropped after filtering, 141184 received, 141184 on link
2014-09-23T03:57:09+0000 PacketFilter::Dropped_Packets 6 packets dropped after filtering, 140874 received, 140874 on link
#open 2014-09-23-04-02-10
2014-09-23T04:02:09+0000 PacketFilter::Dropped_Packets 2599 packets dropped after filtering, 136745 received, 136745 on link
#open 2014-09-23-05-02-10
2014-09-23T05:02:09+0000 PacketFilter::Dropped_Packets 2448 packets dropped after filtering, 134282 received, 134282 on link
#open 2014-09-23-06-02-10
2014-09-23T06:02:09+0000 PacketFilter::Dropped_Packets 2921 packets dropped after filtering, 131329 received, 131329 on link
#open 2014-09-23-07-02-10
2014-09-23T07:02:09+0000 PacketFilter::Dropped_Packets 3230 packets dropped after filtering, 139087 received, 139087 on link
#open 2014-09-23-08-00-07
2014-09-23T08:02:09+0000 PacketFilter::Dropped_Packets 44840 packets dropped after filtering, 179889 received, 179884 on link
#open 2014-09-23-09-02-10
2014-09-23T09:02:09+0000 PacketFilter::Dropped_Packets 3291 packets dropped after filtering, 135096 received, 135095 on link
#open 2014-09-23-10-02-10
2014-09-23T10:02:09+0000 PacketFilter::Dropped_Packets 2428 packets dropped after filtering, 134041 received, 134041 on link
#open 2014-09-23-11-02-10
2014-09-23T11:02:09+0000 PacketFilter::Dropped_Packets 2544 packets dropped after filtering, 131655 received, 131655 on link
#open 2014-09-23-12-02-10
2014-09-23T12:02:09+0000 PacketFilter::Dropped_Packets 2655 packets dropped after filtering, 136899 received, 136899 on link
#open 2014-09-23-13-02-10
2014-09-23T13:02:09+0000 PacketFilter::Dropped_Packets 2722 packets dropped after filtering, 142520 received, 142520 on link