VLAN tagging segregates traffic between domains so that a domain only sees the traffic on its virtual network. The VLAN tags are used for Oracle RAC groups, application domains, and dedicated database domains containing zones.
As of SuperCluster software version 2.4, you can have up to sixteen virtual LAN (VLAN) tags. You specify the number of VLAN tags and the VLAN tag IDs in the SuperCluster Configuration Worksheets. The VLAN tags are configured in SuperCluster by Oracle personnel.