Methods, systems and software products for configuring a virtual port for a physical server to support packets transfer between the physical server and other network nodes over a virtual network, comprising transmitting one or more configuration Protocol Data Units (PDU) of an extended Link Layer Data Protocol (LLDP) to a Network Interface Card (NIC) of a physical server connected to a network, the configuration PDU(s) comprising one or more extension Type Length Values (TLV) defining one or more virtual network settings for a virtual network port mapping the physical server in a virtual network. The NIC is configured to deploy the virtual network port to support exchange of packets between the physical server and one or more of a plurality of nodes of the virtual network by processing outgoing and incoming packets according to one or more virtual network virtualization protocols using one or more of the virtual network settings.