Unlike traditional Nova deployments, when Quantum is in use, Nova should not run a nova-network. Instead, Nova delegates almost all of the network-related decisions to Quantum. This means many of the network-related CLI command and configuration options you are familiar with from using Nova do not work with Quantum.
Therefore, it is very important that you refer to this guide when configuring networking, rather than relying on Nova networking documentation or past experience with Nova. If a Nova CLI command or configuration option related to networking is not mentioned in this guide, it is likely not supported for use with Quantum. In particular, using CLI tools like 'nova-manage' and 'nova' to manage networks or IP addressing, including both fixed and floating IPs, is not supported with Quantum.
![]() | Note |
---|---|
It is strongly recommended that you uninstall nova-network and reboot any physical nodes that had been running nova-network before using them to run Quantum. Inadvertently running the nova-network process while using Quantum can cause problems, as can stale iptables rules pushed down by previously running nova-network. |