Comment 1 for bug 1888666

what release of openstack are you using

i have not found the code path for disabling a network but assuming it just set the adminstate on all the ports to down
that has not removed the interface form the linux bridge since
https://review.opendev.org/#/c/193485/22 which merged in liberty 5 years ago.
https://github.com/openstack/neutron/blob/f8b990736ba91af098e467608c6dfa0b801ec19c/neutron/plugins/ml2/drivers/agent/_common_agent.py#L259-L296

seting the admin state down simply sets the linkstate down.

if disabling the network which sets the admin state of the network down does something other then set the admin state on all the ports on that netorkdown perhaps there is a race? but if its just setting the port down i dont see how that would cause a loop since that would just set the linkstate down.