Thanks for your valuable comments and find the below observation.

1. PCI-passthrough interface configuration
	DATA0IF=eno1
	PHYSNET2='physnet2'
	system datanetwork-add $PHYSNET2 vlan
	system host-if-modify -m 1500 -n pcipass -c pci-passthrough ${COMPUTE} ${DATA0IFUUID}
	system interface-datanetwork-assign ${COMPUTE} pcipass ${PHYSNET2}
	
2. Updated nova.conf 
	cat > nova-overrides.yaml <<EOF
	conf:
	 nova:
	  DEFAULT:
	    debug: True
	  pci:
	    alias:
	        type: multistring
	        values:
	        - '{"vendor_id": "8086", "product_id": "37cd","device_type":"type-PCI","name": "intel-X722-pf"}'
	        - '{"vendor_id": "8086", "product_id": "37cd","device_type":"type-PCI","name": "intel-X722-vf"}'
	EOF
	system helm-override-update stx-openstack nova openstack --values nova-overrides.yaml
	system application-apply stx-openstack
	system application-list
	
3. To finding pci device, vender id
	[sysadmin@controller-0 script(keystone_admin)]$ lspci -nn | grep Eth
	18:00.0 Ethernet controller [0200]: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01)
	18:00.1 Ethernet controller [0200]: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection [8086:10fb] (rev 01)
	3d:00.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection X722 for 10GBASE-T [8086:37d2] (rev 09)
	3d:00.1 Ethernet controller [0200]: Intel Corporation Ethernet Connection X722 for 10GBASE-T [8086:37d2] (rev 09)
	3d:02.0 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.1 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.2 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.3 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.4 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.5 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.6 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	3d:02.7 Ethernet controller [0200]: Intel Corporation Ethernet Virtual Function 700 Series [8086:37cd] (rev 09)
	af:00.0 Ethernet controller [0200]: Mellanox Technologies MT27700 Family [ConnectX-4] [15b3:1013]
	af:00.1 Ethernet controller [0200]: Mellanox Technologies MT27700 Family [ConnectX-4] [15b3:1013]
	
4. Specific interface status check (UP) and It contains virtual function
	[sysadmin@controller-0 ~(keystone_admin)]$ ip link show eno1
	2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
		link/ether a4:bf:01:54:82:cd brd ff:ff:ff:ff:ff:ff
		vf 0 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 1 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 2 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 3 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 4 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 5 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 6 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
		vf 7 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
	
5. Created Instance without adding flavor --property "pci_passthrough:alias"
	openstack network create ${NET}-net --mtu 1500 --provider-network-type vlan --provider-physical-network $PHYSNET2
	openstack subnet create --network ${NET}-net --subnet-range 192.168.15.0/24 --ip-version 4 --dhcp ${NET}-subnet
	openstack image create --file cirros-0.4.0-x86_64-disk.img --disk-format qcow2 --public ${NET}-image
	openstack server create --flavor m1.tiny --image ${NET}-image --nic net-id=${NET}-net ${NET}-vm0
	
6. Created instance successfully, Also I have below queries
	◊ Whether I have entered("product_id": "37cd", name) details correct into nova-overrides.yaml?
	◊ Without adding "pci_passthrough:alias to the flavor, used default flavor to create instance. Is it correct ?
 Instance ERROR State on below work around:
	◊ When I add pci_passthrough:alias"="intel-X722-vf:1" to flavor(m1.tiny) the instance is getting ERROR state,Is it correct behavior?