Comment 40 for bug 1853638

I am having the same issue. Unfortunately the systems are already in production so testing is a bit limited and the issue was not present at first (not sure why or we didn't notice somehow).

I can confirm that I am seeing approx. 8% loss and huge latency > 1s sometimes.
Both tested with Ubuntu 18.04 and Ubuntu 20.04 with standard kernel and Libvirt/Openstack VMs. No difference.

Bond with LACP, bond first NIC primary and bond second NIC primary makes absolutely no difference.
Changed almost all NIC parameters (offloading, ring size, queues) etc., still same result.

My last bet was to completely remove the bond and just use the first NIC interface. That worked and now I have stable latency and no loss.

Don't know what exactly causes this because we already replaced the NIC with Mellanox and even had the same issue, so I am not sure if this is an issue that happens when the BCM NIC is present but NOT USED somehow (was installed on mainboard). But I can't do further testing now. Removing the bond was my solution as @niveditasinghvi solution did not work for me.