This value identifies a particular line card module
according to that module's value of entPhysicalIndex in
the entPhysicalTable of the ENTITY-MIB (RFC 2737).
The forwarding information base present on this module
is checked for consistency with the fcRouteTable.
The value of this object is relevant only if
fcRouteVerifyType is either fibShadow(2) or
fibHardware(3).