Creating the Network for Compute VMs
You must run the command that creates the network and the bridge using the br100 specified in the nova.conf file to create the network that the virtual machines
use. This example shows the
network range using 192.168.100.0/24 as the fixed range for our guest VMs, but you can substitute the range for the network you have
available. We're labeling it with "private" in this case.
nova-manage network create private --multi_host=T --fixed_range_v4=192.168.100.0/24 --num_networks=1 --network_size=256