The interface or interfaces associated with this Marking table entry. The bridge corresponding to this Marking table entry is defined to admit packets on ingress to the bridge from the specified interfaces that meet all of the criteria specified in the Marking table entry. The following values are defined. - To associate this Marking with a single interface listed in the AvailableInterface table, the Marking Interface value is set to the value of corresponding AvailableInterfaceKey. - AllInterfaces indicates that this Marking is associated with all LAN and WAN interfaces listed in the AvailableInterface table (all entries of InterfaceType LANInterface or WANInterface). - LANInterfaces indicates that this Marking is associated with all LAN interfaces listed in the AvailableInterface table (all entries of InterfaceType LANInterface). - WANInterfaces indicates that this Marking is associated with all WAN interfaces listed in the AvailableInterface table (all entries of InterfaceType WANInterface). - An empty string indicates the Marking table entry is not associated with any interface (and has no effect). If there is more than one enabled Marking table entry that specifies one or more of the same interfaces for the same bridge (i.e. identical values of MarkingBridgeReference), then for packets on egress from the specified bridge to those interfaces, the applied marking MUST be that specified in the Marking table entry among those in conflict with the lowest MarkingKey value. If an interface in a given bridge does not have a corresponding Marking table entry, the marking is left unchanged on egress.