User Manual

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.

AirLive ARM-204 v2 User’s Manual