openstack/kolla-ansible
Code Issues Proposed changes

Configure OVN to emit "need to frag" packets in case of MTU mismatch

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It is useful when external network's MTU is lower then internal
geneve networks.
Host kernel needs to be in version >= 5.2 for this option to work.
All Kolla supported host operating systems have higher kernel version.

Change-Id: Id64e99b07e2bb5e6c97b784f4ffedafc7e7de188
This commit is contained in:
Bartosz Bezak 2023-08-25 12:55:51 +02:00
parent 106a21fb6c
commit cf8283928e
2 changed files with 8 additions and 0 deletions
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1
ansible/roles/neutron/templates/ml2_conf.ini.j2
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@ -40,4 +40,5 @@ ovn_nb_connection = {{ ovn_nb_connection }}
ovn_sb_connection = {{ ovn_sb_connection }}
ovn_metadata_enabled = True
enable_distributed_floating_ip = {{ neutron_ovn_distributed_fip | bool }}
ovn_emit_need_to_frag = True
{% endif %}

7
releasenotes/notes/ovn-emit-need-to-frag-2d6695596042db18.yaml Normal file
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@ -0,0 +1,7 @@
---
upgrade:
- |
Enabled ``ovn_emit_need_to_frag`` setting by default. It is useful when
external network's MTU is lower then internal geneve networks.
Host kernel needs to be in version >= 5.2 for this option to work.
All Kolla supported host operating systems have higher kernel version.