Networking Option 1: Provider networks

Configure the Networking components on a compute node.

Configure the Linux bridge agent

The Linux bridge agent builds layer-2 (bridging and switching) virtual networking infrastructure for instances and handles security groups.

  • Edit the /etc/neutron/plugins/ml2/linuxbridge_agent.ini file and complete the following actions:

    • In the [linux_bridge] section, map the provider virtual network to the provider physical network interface:

      physical_interface_mappings = provider:PROVIDER_INTERFACE_NAME

      Replace PROVIDER_INTERFACE_NAME with the name of the underlying provider physical network interface. See Host networking for more information.

    • In the [vxlan] section, disable VXLAN overlay networks:

      enable_vxlan = false
    • In the [securitygroup] section, enable security groups and configure the Linux bridge iptables firewall driver:

      # ...
      enable_security_group = true
      firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver
    • Ensure your Linux operating system kernel supports network bridge filters by verifying all the following sysctl values are set to 1:


      To enable networking bridge support, typically the br_netfilter kernel module needs to be loaded. Check your operating system’s documentation for additional details on enabling this module.

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