AirLive ARM-204 v2 - Manual (Page 57)

then to their destination by converting an Ethernet MAC address into an ATM address.
The key for the IEEE 802.1Q to perform the above functions is in its tags. 802.1Q-compliant switch ports can
be configure 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 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 received a tagged frame, they will not understand the VLAN tab 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 1518 to 1522 bytes. This could cause network interface cards and older switches
to drop tagged frames as “oversized”
Î Assign VLAN PVID for each interface: You can assign ATM VC, Ethernet (LAN) port, and Wireless LAN
port’s PVID in this section.
Î Define VLAN Group: Based on each VLAN group, you can configure each group’s VLAN setting. You can
configure up to 8 VLAN settings.
4.4.6 ADSL
Select this option to set ADSL Mode and ADSL Type information.
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AirLive ARM-204 v2 User’s Manual