7.5. Configure the Plug-in Agent

Procedure 7.14. Configuring the Open vSwitch Plug-in Agent

1. Start the openvswitch service:

   # systemctl start openvswitch.service

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2. Configure the openvswitch service to start at boot time:

   # systemctl enable openvswitch.service

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3. Each host running the Open vSwitch agent requires an Open vSwitch bridge called br-int, which is used for private network traffic. This bridge is created automatically.

   Warning

   The br-int bridge is required for the agent to function correctly. Once created, do not remove or otherwise modify the br-int bridge.
4. Set the value of the bridge_mappings configuration key to a comma-separated list of physical networks and the network bridges associated with them:

   # openstack-config --set /etc/neutron/plugins/ml2/openvswitch_agent.ini \
      ovs bridge_mappings PHYSNET:BRIDGE

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   Replace PHYSNET with the name of a physical network, and replace BRIDGE with the name of the network bridge.
5. Start the neutron-openvswitch-agent service:

   # systemctl start neutron-openvswitch-agent.service

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6. Configure the neutron-openvswitch-agent service to start at boot time:

   # systemctl enable neutron-openvswitch-agent.service

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7. Configure the neutron-ovs-cleanup service to start at boot time. This service ensures that the OpenStack Networking agents maintain full control over the creation and management of tap devices:

   # systemctl enable neutron-ovs-cleanup.service

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Procedure 7.15. Configuring the Linux Bridge Plug-in Agent

1. Set the value of the physical_interface_mappings configuration key to a comma-separated list of physical networks and the VLAN ranges associated with them that are available for allocation to tenant networks:

   # openstack-config --set /etc/neutron/plugin.ini \
      LINUX_BRIDGE physical_interface_mappings PHYSNET:VLAN_START:VLAN_END

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   Replace the following values:
   • Replace PHYSNET with the name of a physical network.
   • Replace VLAN_START with an identifier indicating the start of the VLAN range.
   • Replace VLAN_END with an identifier indicating the end of the VLAN range.
2. Start the neutron-linuxbridge-agent service:

   # systemctl start neutron-linuxbridge-agent.service

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3. Configure the neutron-linuxbridge-agent service to start at boot time:

   # systemctl enable neutron-linuxbridge-agent.service

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