We have narrowed it down to a flaw in a specific configuration setting on this NIC, so we're comparing the good and bad configurations now.
Primary port: enp94s0f0 Secondary port: enp94s0f1d1 A] Good config for fault-tolerance (active-backup) bonding mode: -------------------------------------------------------------- Primary port = active interface; Secondary port = backup B] Bad config for fault-tolerance (active-backup) bonding mode: -------------------------------------------------------------- Primary port = backup interface; Secondary port = active We are consistently able to reproduce a drop rate difference with UDP pkts, for the above good/bad cases: Good Case UDP MTR Test Result --------------------------------- mtr --no-dns --report --report-cycles 60 --udp -s 1428 $DEST Start: 2020-02-10T10:14:01+0000 HOST: hostname Loss% Snt Last Avg Best Wrst StDev 1.|-- nn.nn.nnn.nnn 0.0% 60 0.3 0.2 0.2 0.3 0.0 Bad Case UDP MTR Test Result ------------------------------- mtr --no-dns --report --report-cycles 60 --udp -s 1428 $DEST Start: 2020-02-10T14:10:52+0000 HOST: hostname Loss% Snt Last Avg Best Wrst StDev 1.|-- nn.nn.nnn.nnn 8.3% 60 0.3 0.3 0.2 0.4 0.0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1853638 Title: BCM57416 NetXtreme-E Dual-Media 10G RDMA Ethernet device seems to be dropping data To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853638/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
