metrotek Bercut-MMT, Operation Manual

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11.2 Loopback Configuration 67
packets do not have VLAN tags, they are sent unchanged (even there
are user defined tags).
– VLAN ID — a 12-bit VLAN identification, is a number from 0
to 4095, uniquely identifies the network a frame belongs to. VLAN
ID zero value shows this given frame carries no information about
VLAN and has only priority information.
Figure 11.8. VLAN Settings Menu
– VLAN Priority set a priority, which a frame will be tagged with
(is considered on processing in the network device).
Priority and traffic type mapping according to IEEE 802.1Q is
presented in Table B.1 of Annex B, page 73.
If Layer 3 is selected as loopback layer, both source and destination
MAC addresses and IP addresses will be switched.
To change MAC and IP addresses, it is necessary to set corresponding
flags (F3, F4, F5, F6 functional keys) and use virtual keyboard (refer
to Figure 11.9, page 68), that is displayed on pressing with a stylus at
address input field.
Bercut-MMT: Ethernet Networks Analysis