The value of tIngClassPlcyLspExpFC specifies the forwarding class or the sub forwarding class to be used to classify all the traffic that matches the specific lsp-exp i.e. tIngClassPlcyLspExpValue. Specification of a sub forwarding class is also allowed. The format of a sub forwarding class is the concatenation of the base forwarding class and a sub class identifier in the form base-fc-name[.sub-fc-name] To reference a sub forwarding class, the mapping of the sub forwarding class should be existing in this QoS policy. Unless tIngClassPlcyLspExpFC is specified explicitly, this match will be ignored for classification purposes.