All interfaces on the Cisco Nexus 1000V are Layer 2 Ethernet interfaces, which include access ports, trunk ports, private VLAN ports, and promiscuous ports.
An access port carries traffic for one VLAN. This type of port is a Layer 2 interface only.
Private VLAN Ports
Private VLANs (PVLANs) are used to segregate Layer 2 ISP traffic and convey it to a single router interface. PVLANs achieve device isolation by applying Layer 2 forwarding constraints that allow end devices to share the same IP subnet while being isolated by Layer 2. The use of larger subnets reduces address management overhead. Three separate port designations are used. Each has its own unique set of rules that regulate the ability of each connected endpoint to communicate with other connected endpoints within the same PVLAN domain.
For more information about PVLANs, see the Cisco Nexus 1000V Layer 2 Switching Configuration Guide
A promiscuous port can talk to all other types of ports. A promiscuous port can talk to isolated ports as well as community ports, and those ports can also talk to promiscuous ports.
For more information about promiscuous ports, see the Cisco Nexus 1000V Layer 2 Switching Configuration Guide .
A trunk port carries traffic for two or more VLANs. This port type is a Layer 2 interface only.