openstack/neutron
Code Issues Proposed changes

Merge "Flip ovn_emit_need_to_frag to True by default"

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Zuul 2024-10-03 03:55:50 +00:00 committed by Gerrit Code Review
commit f861f98adc
2 changed files with 11 additions and 4 deletions
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8
neutron/conf/plugins/ml2/drivers/ovn/ovn_conf.py
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@ -175,12 +175,12 @@ ovn_opts = [
"option to be unset globally.\n"
"See the ovn-nb(5) man page for available options.")),
cfg.BoolOpt('ovn_emit_need_to_frag',
default=False,
default=True,
help=_('Configure OVN to emit "need to frag" packets in '
'case of MTU mismatches.\n'
'Before enabling this option make sure that '
'it is supported by the host kernel (version >= 5.2) '
'or by checking the output of the following command:\n'
'You may have to disable this option if you are '
'running an old host kernel (version < 5.2). You may '
'check the output of the following command:\n'
'ovs-appctl -t ovs-vswitchd dpif/show-dp-features '
'br-int | grep "Check pkt length action".')),
cfg.BoolOpt('disable_ovn_dhcp_for_baremetal_ports',

7
releasenotes/notes/enable-ovn_emit_need_to_frag-by-default-9ba0169e70a55173.yaml Normal file
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@ -0,0 +1,7 @@
---
upgrade:
- |
The ``ovn_emit_need_to_frag`` option for OVN is now enabled by default.
This may result in performance issues on older kernels (older than 5.2). If
you are still using an old kernel, you may consider setting it to
``False``.