Configure DHCP agent

DHCP agent setup: OVS plug-in
DHCP agent setup: NSX plug-in
DHCP agent setup: Ryu plug-in

The DHCP service agent is compatible with all existing plug-ins and is required for all deployments where VMs should automatically receive IP addresses through DHCP.

Procedure 7.12. To install and configure the DHCP agent

You must configure the host running the neutron-dhcp-agent as a "data forwarding node" according to the requirements for your plug-in (see the section called “Configure neutron agents”).
Install the DHCP agent:
```
# apt-get install neutron-dhcp-agent
```
Finally, update any options in the /etc/neutron/dhcp_agent.ini file that depend on the plug-in in use (see the sub-sections).

Important

	Important
If you reboot a node that runs the DHCP agent, you must run the neutron-ovs-cleanup command before the `neutron-dhcp-agent` service starts. On Red Hat, SUSE, and Ubuntu based systems, the `neutron-ovs-cleanup` service runs the neutron-ovs-cleanup command automatically. However, on Debian-based systems (including Ubuntu prior to Icehouse), you must manually run this command or write your own system script that runs on boot before the `neutron-dhcp-agent` service starts.

If you reboot a node that runs the DHCP agent, you must run the neutron-ovs-cleanup command before the neutron-dhcp-agent service starts.

On Red Hat, SUSE, and Ubuntu based systems, the neutron-ovs-cleanup service runs the neutron-ovs-cleanup command automatically. However, on Debian-based systems (including Ubuntu prior to Icehouse), you must manually run this command or write your own system script that runs on boot before the neutron-dhcp-agent service starts.

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