I guess you upgraded from an original neutron 8 config to queens. In queens external_network_bridge has been deprecated and should not be used (Using this will result in incorrect port statuses).
What happens if you use "external_network_bridge = "
I guess you upgraded from an original neutron 8 config to queens. In queens external_ network_ bridge has been deprecated and should not be used (Using this will result in incorrect port statuses).
What happens if you use "external_ network_ bridge = "