This is actually on a deployment with three OpenStack controllers, each running dhcp-agent, but not in HA mode, so dhcp_agents_per_network is already at the default value of 1.
We also have a non-default setting: enable_isolated_metadata = true.
Most of the networks are tenant networks, but there are a few provider networks with Neutron DHCP enabled.
This is actually on a deployment with three OpenStack controllers, each running dhcp-agent, but not in HA mode, so dhcp_agents_ per_network is already at the default value of 1.
We also have a non-default setting: enable_ isolated_ metadata = true.
Most of the networks are tenant networks, but there are a few provider networks with Neutron DHCP enabled.