EXFO ETS-1000 - Manual (Page 107)

Configuring and Starting a Test
Ethernet Tester Analyzer 99
BERT
BERT MPLS Settings
The Label stack for networks testing and reception rules can be specified
in the MPLS menu. Configure the following parameters from the MPLS
menu as explained below.
Press Tests, select BERT, Setup, Header, Advanced, and MPLS.

Transmission: Switches to the Label stack menu.

Reception: Switches to the Reception rules menu.
Values specified in the Label stack and Reception rules menu are also
displayed on the screen.

Labels: Enter the number of labels. Choices are from 1 to 3.

Label: Enter the Label value.

MPLS COS: Select the Class of Service (COS) for datagram.