EXFO FTB-8500 Series for FTB-200 - Manual (Page 239)

Stream Generation Tabs
Ethernet and Fibre Channel Application 225
MPLS
MPLS
Allows MPLS configuration of streams with up to two layers of MPLS labels,
COS/EXP and TTL parameters.
Note: MPLS has to be enabled during the test setup (refer to MPLS on page 96)
and the Network set to MPLS/IPv4, MPLS/IPv6, or MPLS/None (see
Stream Configuration on page 211) to gives access to the MPLS
configuration for the selected stream.
Press Main, Test, Stream Generation, and MPLS.
Stream No.
Select the stream number from the list.