Comment 26 for bug 1961740

Still seeing similar issue as below, reopening the bug

- https://storage.bhs.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_ed8/901717/1/gate/neutron-functional-with-uwsgi/ed8e900/testr_results.html

Fails as:- neutron.privileged.agent.linux.ip_lib.NetworkInterfaceNotFound: Network interface sg-aeb1f7f1-24 not found in namespace snat-89cb4e33-917d-4ba3-b89f-48963ea3d024.

Device added/deleted/added quickly:-
2023-11-29T10:17:44.507Z|06104|bridge|INFO|bridge test-br8645578e: added interface sg-aeb1f7f1-24 on port 4
2023-11-29T10:17:44.865Z|06115|bridge|INFO|bridge test-br8645578e: deleted interface sg-aeb1f7f1-24 on port 4
2023-11-29T10:17:44.877Z|06117|bridge|INFO|bridge test-br8645578e: added interface sg-aeb1f7f1-24 on port 4
2023-11-29T10:17:45.336Z|06131|bridge|INFO|bridge test-br8645578e: deleted interface sg-aeb1f7f1-24 on port 4

- https://storage.bhs.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_03d/901718/1/gate/neutron-functional-with-uwsgi/03d59c7/testr_results.html

Fails as:- neutron.privileged.agent.linux.ip_lib.NetworkInterfaceNotFound: Network interface sg-44024bfc-76 not found in namespace snat-0afef646-ef9d-406e-b479-6cc7861f8804.

Device added/deleted/added quickly:-
2023-11-29T10:53:03.124Z|03237|bridge|INFO|bridge test-brf59c6dc7: added interface sg-44024bfc-76 on port 4
2023-11-29T10:53:03.804Z|03253|bridge|INFO|bridge test-brf59c6dc7: deleted interface sg-44024bfc-76 on port 4
2023-11-29T10:53:03.817Z|03256|bridge|INFO|bridge test-brf59c6dc7: added interface sg-44024bfc-76 on port 4
2023-11-29T10:53:05.215Z|03282|bridge|INFO|bridge test-brf59c6dc7: deleted interface sg-44024bfc-76 on port 4

- https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_109/periodic/opendev.org/openstack/neutron/master/neutron-functional-with-sqlalchemy-master/10928da/testr_results.html

Fails as:- AssertionError: Device name: fg-1f3bd0ce-36, expected MAC: fa:16:3e:80:8d:89, expected CIDRs: ['19.4.5.8/24'], device MAC: 0e:d2:9d:26:57:e6

Device added/deleted/added quickly
2023-12-11T03:51:16.045Z|05000|bridge|INFO|bridge test-br4d6080f6: added interface fg-1f3bd0ce-36 on port 6
2023-12-11T03:51:16.437Z|05008|bridge|INFO|bridge test-br4d6080f6: deleted interface fg-1f3bd0ce-36 on port 6
2023-12-11T03:51:16.446Z|05010|bridge|WARN|could not add network device fg-1f3bd0ce-36 to ofproto (No such device)
2023-12-11T03:51:16.556Z|05013|bridge|INFO|bridge test-br4d6080f6: added interface fg-1f3bd0ce-36 on port 8
2023-12-11T03:51:24.190Z|05053|netdev_linux|INFO|ioctl(SIOCGIFHWADDR) on fg-1f3bd0ce-36 device failed: No such device
2023-12-11T03:51:29.670Z|05098|bridge|INFO|bridge test-br4d6080f6: deleted interface fg-1f3bd0ce-36 on port 8