Comment 2 for bug 1837252

triaging as high as folding could lead to network disruption to guests on multiple hosts.

i have root caused this as a result of combining the code into a single shared codepath between the ovs and linux bridge plugin

for ovs hybrid plug we set the ageing to 0 to prevent packet loss during live migation

https://github.com/openstack/os-vif/commit/fa4ff64b86e6e1b6399f7250eadbee9775c22d32#diff-f55bc78ffb4c10000bbf81b88bf68673

however this is not valid for linux bridge in general

https://github.com/openstack/os-vif/commit/1f6fed6a69e9fd386e421f3cacae97c11cdd7c75#diff-010d1833da7ca175fffc8c41a38497c2

which replace the use of brctl in the linux bridge driver resued the common code i introduced in

https://github.com/openstack/os-vif/commit/5027ce833c6fccaa80b5ddc8544d262c0bf99dbd#diff-
cec1a2ac6413663c344b607129c39fab

and as a result it picked up the ovs ageing code which was not intentinal.

ill fix this shortly and backport it.