ZyXEL Communications MSAP2000 manual Super Channel, 2 LLC, VC Mux, Virtual Channel Profile

MSAP2000 AAMS User’s Guide

For example, you want to give high priority to voice service on one of the ADSL ports.

First configure a static VLAN on the MSAP2000 AAMS for voice on the port.

Then do the following:

•Configure a channel on the port for voice service.

•Set the channel to use the PVID of the static VLAN you configured.

•Assign the channel a high priority.

7.8.1Super Channel

The MSAP2000 AAMS forwards frames belonging to VLAN groups that are not assigned to specific channels to the super channel. Enable the super channel option to allow a channel forward frames belonging to multiple VLAN groups (that are not assigned to other channels). The super channel functions in the same way as the channel in a single channel environment. One port can have only one super channel.

7.8.2 LLC

LLC is a type of encapsulation where one VC (Virtual Circuit) carries multiple protocols with each packet header containing protocol identifying information. Despite the extra bandwidth and processing overhead, this method may be advantageous if it is not practical to have a separate VC for each carried protocol, for example, if charging heavily depends on the number of simultaneous VCs.

7.8.3 VC Mux

VC Mux is a type of encapsulation where, by prior mutual agreement, each protocol is assigned to a specific virtual circuit, for example, VC1 carries IP, VC2 carries IPX, and so on. VC-based multiplexing may be dominant in environments where dynamic creation of large numbers of ATM VCs is fast and economical.

7.8.4Virtual Channel Profile

Virtual channel profiles allow you to configure the virtual channels efficiently. You can configure all of the virtual channels with the same profile, thus removing the need to configure the virtual channels one-by-one. You can also change an individual virtual channel by assigning it a different profile.

The MSAP2000 AAMS provides two default virtual channel profiles: DEFVAL (for LLC encapsulation) and DEFVAL_VC (for VC encapsulation). By default, all virtual channels are associated to DEFVAL.

63