EXFO ETS-1000G - Manual (Page 39)

Preparing RFC 2544 for Analysis
10 Gigabit Ethernet Analyzer 29
Additional header parameters
VLAN setting
VLAN Selecting the number of labels (1 - 3, Off).
ID A 12-bit VLAN identifier. It is a number in the range
from 0 to 4095. It uniquely defines the VLAN which a
frame belongs to. The zero value of VLAN ID indicates
that this frame carries no information about VLAN and
contains priority information only. If the value of VLAN
ID is set to 1, when the frame passes through the switch's
port, the value of VLAN ID of this frame will be set to the
port's VLAN ID.
Priority This field defines a traffic priority. Eight traffic priority
values are supported. A correspondence between traffic
priorities and traffic types is described in Reference Tables
on page 143.