Bug 1741656 - [Docs][Networking] Open vSwitch bonds with LACP are mistakenly listed as Tech Preview
Summary: [Docs][Networking] Open vSwitch bonds with LACP are mistakenly listed as Tech...
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: documentation
Version: 13.0 (Queens)
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: ---
Assignee: RHOS Documentation Team
QA Contact: RHOS Documentation Team
Depends On:
TreeView+ depends on / blocked
Reported: 2019-08-15 18:17 UTC by Dan Sneddon
Modified: 2019-08-15 22:24 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2019-08-15 22:24:36 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Bugzilla 1267291 None CLOSED [Openvswitch] balance-tcp bond mode causing issues with OSP Deployments 2019-08-20 12:55:39 UTC

Description Dan Sneddon 2019-08-15 18:17:30 UTC
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

Comment 2 Dan Sneddon 2019-08-15 22:24:36 UTC
I had read the linked documentation incorrectly, it applies only to OVS-DPDK. OVS-DPDK with LACP bonds is still considered Tech Preview.

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