This is the inbound counterpart to cpwVcMplsOutboundStorageType, indicating whether this pseudowire's inbound MPLS mapping configuration will survive a device reload or was only ever held in volatile memory. Checking it alongside the outbound storage type catches a subtle failure mode where a device reload restores outbound signaling for a VC but drops the inbound mapping, leaving the pseudowire only half-functional after a maintenance window. Auditing storage type consistency between inbound and outbound entries for the same VC is a quick way to catch incomplete 'write memory' operations after configuring a pseudowire's MPLS bindings.