Bug 2318545 - Fix description of OVNEmitNeedToFrag in official docs
Summary: Fix description of OVNEmitNeedToFrag in official docs
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: documentation
Version: 17.1 (Wallaby)
Hardware: Unspecified
OS: Unspecified
high
low
Target Milestone: z4
: ---
Assignee: James Smith
QA Contact: RHOS Documentation Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2024-10-14 14:20 UTC by Ihar Hrachyshka
Modified: 2025-01-13 18:06 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Last Closed: 2025-01-13 18:03:59 UTC
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Red Hat Issue Tracker OSP-32950 0 None None None 2024-10-14 14:21:12 UTC

Description Ihar Hrachyshka 2024-10-14 14:20:47 UTC 
This bug was initially created as a copy of Bug #2314429

I am copying this bug because: 

The official docs: https://docs.redhat.com/en/documentation/red_hat_openstack_platform/17.1/html-single/overcloud_parameters/index#ref_networking-neutron-parameters_overcloud_parameters claim the following about OVNEmitNeedToFrag flag:

"""
 Configure OVN to emit "need to frag" packets in case of MTU mismatch. Before enabling this configuration make sure that it’s supported by the host kernel (version >= 5.2) or by checking the output of the following command ovs-appctl -t ovs-vswitchd dpif/show-dp-features br-int | grep "Check pkt length action". The default value is false
"""

This is incorrect for RHEL, since it backports features to older 4.x kernel versions. The feature in question was backported to 4.x branch, so this comment is invalid. It was probably extracted from the upstream description for the option, but it is confusing to keep it for product docs.
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