Configuring the Neutron L3 agent

Before the neutron-l3-agent service can be started, it must be configured. Neutron stores the L3 agent configuration in the /etc/neutron/l3_agent.ini file. The most common configuration options will be covered here.

Defining an interface driver

Like previously installed agents, the Neutron L3 agent must be configured to use an interface driver that corresponds to the chosen networking plugin.

Using crudini, configure the Neutron L3 agent to use one of the following drivers:

• For LinuxBridge:

  # crudini --set /etc/neutron/l3_agent.ini DEFAULT interface_driver neutron.agent.linux.interface.BridgeInterfaceDriver
  

• For Open vSwitch:

  # crudini --set /etc/neutron/l3_agent.ini DEFAULT interface_driver neutron.agent.linux.interface.OVSInterfaceDriver
  

Setting the external network

The external network connected to a router is one that not only provides external connectivity to the router and the instances behind it, but also serves as the network from which floating IPs are...