When an instance sends traffic on a local network,the traffic remains isolated to the instance and other interfaces connected to the same bridge and/or segment. Services such as DHCP and metadata might not be available to instances on local networks, especially if they are located on different nodes.

To create a local network, use the following syntax:

openstack network create
--provider-network-type local
<name> 

When using the Linux bridge driver, a bridge is created for the local network but no physical or tagged interface is added. Traffic is limited to any port connected to the bridge and will not leave the host. When using the Open vSwitch driver, instances are attached to the integration bridge and can only communicate with other instances in the same local VLAN.