Hi all I have a dozen servers from different manufacturers - HP, Dell and others. Updated two servers to version 13.0-RC3 - errors appeared. Im using lagg + lacp and different network cards - intel 82599, mellanox-4l (all 10gb) netstat -i -I lagg0 Name Mtu Network Address Ipkts Ierrs Idrop Opkts Oerrs Coll lagg0 1500 <Link#4> 00:e0:ed:29:c8:a2 2613127 8249 0 239922 1 0 netstat -i -I ix0 Name Mtu Network Address Ipkts Ierrs Idrop Opkts Oerrs Coll ix0 1500 <Link#1> 00:e0:ed:29:c8:a2 1336670 3297 0 99761 0 0 13.0-RC5 - the same problems with Ierrs But on version 13.0-BETA4 on the same servers, there is no such problem. The error counter is constantly growing, despite the fact that there is no load on these servers at the moment. Packet loss is also observed, about 2-4%. If you need more information, I am ready to provide it.