Merge "Remove parity gap limitation in OVN: N/S MTU fragmentation"

This commit is contained in:
Zuul
2026-01-30 10:26:54 +00:00
committed by Gerrit Code Review

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@@ -47,25 +47,11 @@ at [1]_.
traffic using an OVN router between two private networks. This is being
tracked in [5]_ and [6]_.
* North/South Fragmentation and path MTU discovery
OVN does not correctly fragment IPv4 packets when the MTU of the target
network is smaller than the MTU of the source network. Instead, affected
packets could be silently dropped depending on the direction. OVN will
also not generate ICMP "packet too big" responses for packets that have
the DF bit set, even when the necessary configuration option is used
in ``ml2_conf.ini``::
[ovn]
ovn_emit_need_to_frag = true
This makes path MTU discovery fail, and is being tracked in [5]_ and [7]_.
* Traffic metering
Currently ``neutron-metering-agent`` can only work with the Neutron L3 agent.
It is not supported by the ``ovn-router`` service plugin nor by the
``neutron-ovn-agent``. This is being reported and tracked in [8]_.
``neutron-ovn-agent``. This is being reported and tracked in [7]_.
* Floating IP Port Forwarding in provider networks and with distributed routing
@@ -76,7 +62,7 @@ at [1]_.
Due to an incompatible setting of the router to make traffic in the vlan/flat
networks to be distributed but port forwardings are always centralized in
ML2/OVN backend.
This is being reported in [9]_.
This is being reported in [8]_.
References
----------
@@ -87,6 +73,5 @@ References
.. [4] https://docs.openstack.org/neutron/latest/admin/config-dns-res.html
.. [5] https://bugs.launchpad.net/neutron/+bug/2032817
.. [6] https://bugzilla.redhat.com/show_bug.cgi?id=2238494
.. [7] https://bugzilla.redhat.com/show_bug.cgi?id=2238969
.. [8] https://bugs.launchpad.net/neutron/+bug/2048773
.. [9] https://bugs.launchpad.net/neutron/+bug/2028846
.. [7] https://bugs.launchpad.net/neutron/+bug/2048773
.. [8] https://bugs.launchpad.net/neutron/+bug/2028846