Description of problem: Due to a bug in the Open vSwitch kernel driver, LACP bonds (also known as "balance-tcp" mode) were non-performant and caused issues with lost packets. These issues were fixed in RHEL 7.3.z, and all customers using OSP 13+ should be on a RHEL 7.4 or newer kernel. Version-Release number of selected component (if applicable): OSP 13 docs Actual results: We list OVS bonds with LACP as being Tech Preview, however we fixed the issue with OVS in July of 2017, and tested at scale in the scale lab. The performance issues were gone, and we could no longer trigger packet loss even at large traffic volumes. Expected results: OVS bonds with LACP should be listed as fully supported, although we still recommend Linux bonds with LACP as our first choice. Additional info: OVS bug that was fixed: https://bugzilla.redhat.com/show_bug.cgi?id=1267291 Tracking bug for OSP: https://bugzilla.redhat.com/show_bug.cgi?id=1388592
Here is the docs bug Dan is reporting against: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/advanced_overcloud_customization/overcloud-network-interface-bonding#open-vswitch-bonding-options
I had read the linked documentation incorrectly, it applies only to OVS-DPDK. OVS-DPDK with LACP bonds is still considered Tech Preview.