Installing and configuring additional L3 agents

To configure HA routers, two or more L3 agents are required. To install the Neutron L3 agent, run the following command on the remaining compute nodes:

# apt-get install neutron-l3-agent

Defining an interface driver

Both the LinuxBridge and Open vSwitch mechanism drivers support HA routers, and the Neutron L3 agent must be configured to use the interface driver that corresponds to the chosen mechanism driver.

Update the Neutron L3 configuration file on the compute nodes at /etc/neutron/l3_agent.ini and specify one of the following interface drivers.

For LinuxBridge, use the following code:

[DEFAULT] 
...
interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver

For Open vSwitch, use the following code:

[DEFAULT] 
...
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver

Setting the external bridge

The external_network_bridge configuration option was discussed in detail in the previous chapter and should be configured identically...