Currently, "VnfVirtualLink" has "ConnectivityType" (tosca.datatypes.nfv.ConnectivityType) Field which supports "layer_protocols" values - ethernet, mpls, odu2, ipv4, ipv6, pseudo-wire. There is no support for dual-stack protocol (dual stack means - Virtual link providing ipv4 as well as ipv6 address to the vdu connecting to it) Any suggestions how to generate NF Package with "Dual-Stack" protocol support for the "tosca.nodes.nfv.VnfVirtualLink" ? Current example of IPv4 protocol is below below. i am looking for similar example for "dual-stack" Virtual link. ================================================ vdu1: type: tosca.nodes.nfv.Vdu.Compute.vdu1 properties: name: vdu1 description: vdu1 vdu_profile: min_number_of_instances: 1 max_number_of_instances: 1 sw_image_data: name: image_name version: '1' checksum: algorithm: sha-256 hash: hash container_format: bare disk_format: qcow2 min_disk: 4 GiB size: 4 GiB capabilities: virtual_compute: properties: virtual_cpu: num_virtual_cpu: 1 virtual_memory: virtual_mem_size: 1024 MiB virtual_local_storage: - size_of_storage: 10 GiB vl1: type: tosca.nodes.nfv.VnfVirtualLink properties: description: vl1 connectivity_type: layer_protocols: - ipv4 vl_profile: min_bitrate_requirements: root: 10000000000 max_bitrate_requirements: root: 10000000000 virtual_link_protocol_data: - associated_layer_protocol: ipv4 l3_protocol_data: name: virtual_link1 ip_version: ipv4 cidr: 20.60.12.0/24 ip_allocation_pools: - start_ip_address: '' end_ip_address: '' dhcp_enabled: true gateway_ip: '' icp: type: tosca.nodes.nfv.VduCp properties: description: null layer_protocols: - ipv4 protocol: - associated_layer_protocol: ipv4 address_data: - address_type: ip_address l3_address_data: ip_address_assignment: false floating_ip_activated: false ip_address_type: ipv4 number_of_ip_address: 1 trunk_mode: false order: 0 requirements: - virtual_binding: vdu1 virtual_link: vl1