Comment 5 for bug 1109140

Thank you for the detailed answer, this is really helpful.

> - How to determine neutron quota API is avaialable or not? -> it can be determined through ext-list.
> - How to know quota update is supported or not? -> horizon local_settings?

I would have liked to avoid an additional setting but it looks like it will be necessary, if there is no API to determine what kind of update is allowed by the current driver.

> - How to get the system default quotas?

Could a read-only API be added to Neutron? (Would that be acceptable to the project?)

> - What should we do if neutron quota API is not available? Just ignore? Disable quota menu?

I think a good solution would be to not show the Neutron quotas + not display the Floating IP quota when Neutron is enabled and the quota_update setting is False. Otherwise it's misleading since Floating IP is actually updating Nova (the current situation).