EXFO FTB-8500 Series for FTB-500 - Manual (Page 511)

Pop-Up Windows
Ethernet and Fibre Channel Application 497
MPLS Configuration
MPLS Configuration
This pop-up window is only available with EtherSAM (Y.1564) test case.
Allows MPLS configuration of services 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 104)
and the Network framing configuration set to MPLS/IPv4, MPLS/IPv6, or
MPLS/None to gives access to the MPLS configuration for the selected
service.

Stacked Headers: Allows the activation of up to two MPLS headers.
The default setting is 1.

Label: Allows the selection of the MPLS TX labels (0 to 1048575). The
default label value is 16.