This read-write TruthValue, when enabled, makes this FlowPoint the default catch-all for tagged packets on the port that do not match any other flow point's explicit VLAN membership, while untagged traffic is handled separately as its own untagged flow. An administrator enables this on one designated flow point per port to ensure tagged traffic that does not fit a specific customer's VLAN membership list still gets classified somewhere rather than being dropped as unmatched. For example, enabling this on a catch-all flow point ensures any stray tagged VLAN traffic not explicitly assigned elsewhere on the port is still forwarded through this default flow.