Public bug reported:
version: caracal
git_version": "4cd33a21f4"
When ovs vswitchd is restarted, the OVN ML2 mech driver emits a port
update event. Those events are sent to the networking generic switch
(NGS) driver, which then re-applies VLAN/tag configuration on each port
even though no real change occurred. It didn't happen on Antelope.
debug logs:
2025-05-23 11:40:36.774 37 DEBUG
neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovsdb_monitor [None
req-4a988f9a-eef6-4184-972f-213bfdc7c4a8 - - - - - -]
Hash Ring: Node 62b4202e-793a-43ec-9575-deb624c009b2 (host: ctrl3078-01)
handling event "update"
for row ae555965-33c4-4f79-b24a-cd871ad2e594 (table: Port_Binding) notify
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:750
2025-05-23 11:40:36.775 37 INFO
neutron.plugins.ml2.drivers.ovn.mech_driver.mech_driver [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
OVN reports status up for port: ae555965-33c4-4f79-b24a-cd871ad2e594
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py:***
2025-05-23 11:40:36.778 37 DEBUG neutron.db.provisioning_blocks [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Provisioning complete for port ae555965-33c4-4f79-b24a-cd871ad2e594
triggered by entity L2.
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/db/provisioning_blocks.py:144
2025-05-23 11:40:36.778 37 DEBUG neutron_lib.callbacks.manager [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Publish callbacks
['neutron.plugins.ml2.plugin.Ml2Plugin._port_provisioned-746611']
for port (ae555965-33c4-4f79-b24a-cd871ad2e594)
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron_lib/callbacks/manager.py:184
2025-05-23 11:40:36.778 37 INFO neutron.plugins.ml2.plugin [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Attempt 1 to provision port ae555965-33c4-4f79-b24a-cd871ad2e594
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/plugin.py:2389
** Affects: neutron
Importance: Undecided
Status: New
** Description changed:
version: caracal
+ {"git_version": "4cd33a21f4", "is_release":
When ovs vswitchd is restarted, the OVN ML2 mech driver emits a port
update event. Those events are sent to the networking generic switch
(NGS) driver, which then re-applies VLAN/tag configuration on each port
even though no real change occurred. It didn't happen on Antelope.
-
debug logs:
2025-05-23 11:40:36.774 37 DEBUG
neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovsdb_monitor [None
req-4a988f9a-eef6-4184-972f-213bfdc7c4a8 - - - - - -]
- Hash Ring: Node 62b4202e-793a-43ec-9575-deb624c009b2 (host: ctrl3078-01)
handling event "update"
- for row ae555965-33c4-4f79-b24a-cd871ad2e594 (table: Port_Binding) notify
-
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:750
+ Hash Ring: Node 62b4202e-793a-43ec-9575-deb624c009b2 (host: ctrl3078-01)
handling event "update"
+ for row ae555965-33c4-4f79-b24a-cd871ad2e594 (table: Port_Binding) notify
+
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:750
2025-05-23 11:40:36.775 37 INFO
neutron.plugins.ml2.drivers.ovn.mech_driver.mech_driver [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
- OVN reports status up for port: ae555965-33c4-4f79-b24a-cd871ad2e594
-
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py:***
+ OVN reports status up for port: ae555965-33c4-4f79-b24a-cd871ad2e594
+
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py:***
2025-05-23 11:40:36.778 37 DEBUG neutron.db.provisioning_blocks [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
- Provisioning complete for port ae555965-33c4-4f79-b24a-cd871ad2e594
triggered by entity L2.
-
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/db/provisioning_blocks.py:144
+ Provisioning complete for port ae555965-33c4-4f79-b24a-cd871ad2e594
triggered by entity L2.
+
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/db/provisioning_blocks.py:144
2025-05-23 11:40:36.778 37 DEBUG neutron_lib.callbacks.manager [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
- Publish callbacks
['neutron.plugins.ml2.plugin.Ml2Plugin._port_provisioned-746611']
- for port (ae555965-33c4-4f79-b24a-cd871ad2e594)
-
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron_lib/callbacks/manager.py:184
+ Publish callbacks
['neutron.plugins.ml2.plugin.Ml2Plugin._port_provisioned-746611']
+ for port (ae555965-33c4-4f79-b24a-cd871ad2e594)
+
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron_lib/callbacks/manager.py:184
2025-05-23 11:40:36.778 37 INFO neutron.plugins.ml2.plugin [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
- Attempt 1 to provision port ae555965-33c4-4f79-b24a-cd871ad2e594
-
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/plugin.py:2389
+ Attempt 1 to provision port ae555965-33c4-4f79-b24a-cd871ad2e594
+
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/plugin.py:2389
** Description changed:
version: caracal
- {"git_version": "4cd33a21f4", "is_release":
+ git_version": "4cd33a21f4"
When ovs vswitchd is restarted, the OVN ML2 mech driver emits a port
update event. Those events are sent to the networking generic switch
(NGS) driver, which then re-applies VLAN/tag configuration on each port
even though no real change occurred. It didn't happen on Antelope.
debug logs:
2025-05-23 11:40:36.774 37 DEBUG
neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovsdb_monitor [None
req-4a988f9a-eef6-4184-972f-213bfdc7c4a8 - - - - - -]
Hash Ring: Node 62b4202e-793a-43ec-9575-deb624c009b2 (host: ctrl3078-01)
handling event "update"
for row ae555965-33c4-4f79-b24a-cd871ad2e594 (table: Port_Binding) notify
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:750
2025-05-23 11:40:36.775 37 INFO
neutron.plugins.ml2.drivers.ovn.mech_driver.mech_driver [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
OVN reports status up for port: ae555965-33c4-4f79-b24a-cd871ad2e594
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py:***
2025-05-23 11:40:36.778 37 DEBUG neutron.db.provisioning_blocks [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Provisioning complete for port ae555965-33c4-4f79-b24a-cd871ad2e594
triggered by entity L2.
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/db/provisioning_blocks.py:144
2025-05-23 11:40:36.778 37 DEBUG neutron_lib.callbacks.manager [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Publish callbacks
['neutron.plugins.ml2.plugin.Ml2Plugin._port_provisioned-746611']
for port (ae555965-33c4-4f79-b24a-cd871ad2e594)
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron_lib/callbacks/manager.py:184
2025-05-23 11:40:36.778 37 INFO neutron.plugins.ml2.plugin [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Attempt 1 to provision port ae555965-33c4-4f79-b24a-cd871ad2e594
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/plugin.py:2389
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https://bugs.launchpad.net/bugs/2111572
Title:
[OVN] OVN ML2 mech driver forces port update to networking generic
switch (NGS) on OVS restart
Status in neutron:
New
Bug description:
version: caracal
git_version": "4cd33a21f4"
When ovs vswitchd is restarted, the OVN ML2 mech driver emits a port
update event. Those events are sent to the networking generic switch
(NGS) driver, which then re-applies VLAN/tag configuration on each
port even though no real change occurred. It didn't happen on
Antelope.
debug logs:
2025-05-23 11:40:36.774 37 DEBUG
neutron.plugins.ml2.drivers.ovn.mech_driver.ovsdb.ovsdb_monitor [None
req-4a988f9a-eef6-4184-972f-213bfdc7c4a8 - - - - - -]
Hash Ring: Node 62b4202e-793a-43ec-9575-deb624c009b2 (host: ctrl3078-01)
handling event "update"
for row ae555965-33c4-4f79-b24a-cd871ad2e594 (table: Port_Binding) notify
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovsdb_monitor.py:750
2025-05-23 11:40:36.775 37 INFO
neutron.plugins.ml2.drivers.ovn.mech_driver.mech_driver [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
OVN reports status up for port: ae555965-33c4-4f79-b24a-cd871ad2e594
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py:***
2025-05-23 11:40:36.778 37 DEBUG neutron.db.provisioning_blocks [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Provisioning complete for port ae555965-33c4-4f79-b24a-cd871ad2e594
triggered by entity L2.
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/db/provisioning_blocks.py:144
2025-05-23 11:40:36.778 37 DEBUG neutron_lib.callbacks.manager [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Publish callbacks
['neutron.plugins.ml2.plugin.Ml2Plugin._port_provisioned-746611']
for port (ae555965-33c4-4f79-b24a-cd871ad2e594)
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron_lib/callbacks/manager.py:184
2025-05-23 11:40:36.778 37 INFO neutron.plugins.ml2.plugin [None
req-a9c45e52-bd2a-4f56-8f3f-31de20b6aa1e - - - - - -]
Attempt 1 to provision port ae555965-33c4-4f79-b24a-cd871ad2e594
/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/plugin.py:2389
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