This section describes how to use component extension for DHCP agents scalability and HA
![]() | Note |
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We can use quantum client command to check if the component extension enabled: gongysh@gongysh-laptop:~$ quantum ext-list -c name -c alias +-----------+------------------------+ | alias | name | +-----------+------------------------+ | component | component | | router | Quantum L3 Router | | binding | Port Binding | | quotas | Quotas for each tenant | | provider | Provider Network | +-----------+------------------------+ |

There will be three hosts in the setup.
Host | Description |
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OpenStack Controller host - controlnode | Runs the Quantum service, Keystone and all of the Nova services that are required to deploy a VM. The service must have at least one network interface, this should be connected to the "Management Network". Note nova-network should not be running. This is replaced by Quantum. |
HostA | Runs Nova compute and the Quantum L2 agent and DCHP agent |
HostB | Same as HostA |