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YML854 Rev1 NB6, NB6W, NB6Plus4, NB6Plus4W, NB6Plus4WnNB6, NB6W, NB6Plus4, NB6Plus4W, NB6Plus4Wn User Guide
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You can check Enable QoS to improve performance for selected applications. More detailed information for
QoS will be introduced in later instruction.
If you choose PPPoE (or Bridging), you will see the option for 802.1Q VLAN Tagging.
802.1Q VLAN Tagging:
802.1Q-compliant switch ports can be configured to transmit tagged or untagged frames. A tag
field containing VLAN (and/or 802.1p priority) information can be inserted into an Ethernet frame. If
a port has an 802.1Q-compliant device attached (such as another switch), these tagged frames can
carry VLAN membership information between switches, thus letting a VLAN span multiple switches.
However, it is important for network administrators to ensure ports with non-802.1Q-compliant
devices attached are configured to transmit untagged frames. Many NICs for PCs and printers are
not 802.1Q-compliant. If they receive a tagged frame, they will not understand the VLAN tag and will
drop the frame. Also, the maximum legal Ethernet frame size for tagged frames was increased in
802.1Q (and its companion, 802.3ac) from 1,518 to 1,522 bytes.
After checking Enable 802.1Q VLAN Tagging, you will have to enter a VLAN ID, as shown.
VLAN ID:
The VLAN Identifier is a 12 bit field. It uniquely identifies the VLAN to which the frame belongs to and
can have a value between 0 and 4095.
Notice that 802.1Q VLAN Tagging function can only be invoked under PPPoE and Bridging Mode; the system
will not provide this option while setting PPPoA or IPoA mode.
Click Next to continue.