This table defines a 'sliding window' mechanism for the definition of 'policy' or 'user' defined VLANs. The mechanism is based on a set of mask and filter fields that when compared to traffic data permit forwarding decisions for the packet to be made for a VLAN. The window may be moved or slide by defining the appropriate offset type and offset values for the mask and filter object fields. Care must be taken to ensure the consistent configuration of VLAN policies. Once a VLAN entry has been made in the table if a change is made to any of the variables in that row for the VLAN then all other entries in other nodes associated with the VLAN must be updated in a corresponding manner! This table is an auxiliary extension to the base VLAN configuration table defined in ibmVlanConfTable. See that table for additional Vlan details.