tSapIngressDefaultFC specifies the forwarding class or the
sub forwarding class which should be used for all traffic that
does not match a specific classification specified in this
SAP ingress QoS policy.
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.
If not specified explicitly, all traffic will be classified
as best-effort 'be'.