Description of configuration options for sriov

Configuration option = Default value	Description
[SRIOV_NIC]
exclude_devices =	(ListOpt) List of <network_device>:<excluded_devices> mapping network_device to the agent's node-specific list of virtual functions that should not be used for virtual networking. excluded_devices is a semicolon separated list of virtual functions (BDF format).to exclude from network_device. The network_device in the mapping should appear in the physical_device_mappings list.
physical_device_mappings =	(ListOpt) List of <physical_network>:<network_device> mapping physical network names to the agent's node-specific physical network device of SR-IOV physical function to be used for VLAN networks. All physical networks listed in network_vlan_ranges on the server should have mappings to appropriate interfaces on each agent