EXFO FTB-8500 Series for FTB-200 - Manual (Page 410)

Tools Tabs
396 FTB-8500 Series and FTB-8120NGE/8130NGE
Traffic Scan
Filtering on a VLAN ID requires that all VLAN IDs from the current up to
the outer VLAN are included in the filtering criteria. Filtering on a VLAN
Priority requires that its VLAN ID is included in the filtering criteria.
Note: Setting a VLAN ID to Ignore will automatically ignore its Priority and TPID
values.
Setting a MPLS ID to Ignore will automatically switch its COS’s filter to
Ignore.