Adding an allowed VLAN range controls which VLANs are allowed to pass over vNICs. When you specify trunk mode on a public network, you must also add a VLAN range. You cannot use access mode to receive the allowed VLANs setting. With this set of ranges of VLAN IDs that are allowed, only traffic that is in the specified VLAN range is allowed to pass over the vNICs connected to the network cloud. By default, this option is set to allow all VLANs (1-4095) on the network cloud. Allowed VLANs are configured per network, so the server will receive the associated VLAN traffic when one or more vNICs terminated in a network cloud is deployed to any number of servers.
The allowed VLAN range configured for the vNIC follows the vNIC. If you move or re-terminate the vNIC on a different server, the VLAN range remains configured for the vNIC as long as the vNIC is connected to the network cloud.