The value of tmnxOamLTtraceAutoFcName specifies the forwarding class
of the MPLS Echo request packets.
The forwarding class name must be one of those defined in the
tFCNameTable in TIMETRA-QOS-MIB. The agent creates predefined
entries in the tFCNameTable for 'premium', 'assured', and 'be'
(for best-effort) forwarding classes. The actual forwarding
class encoding is controlled by the network egress LSP-EXP
mappings.