--B Bridges to be used by deploy script. It can be specified several times,
- or as a comma separated list of bridges, or both: -B br1 -B br2,br3
- First occurence sets PXE Brige, next Mgmt, then Internal and Public.
- For an empty value, the deploy script will use virsh to create the default
- expected network (e.g. -B pxe,,,public will use existing "pxe" and "public"
- bridges, respectively create "mgmt" and "internal").
- Note that a virtual network "mcpcontrol" is always created. For virtual
- deploys, "mcpcontrol" is also used for PXE, leaving the PXE bridge unused.
- For baremetal deploys, PXE bridge is used for baremetal node provisioning,
- while "mcpcontrol" is used to provision the infrastructure VMs only.
- The default is 'pxebr'.