Llc; Vc Mux; Atm Profiles; Pvc Setup Screen - ZyXEL Communications MSC1024G Series User Manual

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Chapter 11 Subscriber Port Setup Screens

The system can handle multiple IEEE 802.1p priority queues on a single PVC. You can also

define up to eight PVCs on a DSL port and use them for different services or levels of service.

You set the PVID that is assigned to untagged frames received on each channel. You also set

an IEEE 802.1p priority for each of the PVIDs. In this way you can assign different priorities

to different channels (and consequently the services that get carried on them or the subscribers

that use them).

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

configure a static VLAN on the system 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.

11.11.1 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.

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.

Asynchronous Transfer Mode (ATM) is a networking technology that provides high-speed

data transfer. ATM uses fixed-size packets of information called cells. With ATM, a high QoS

(Quality of Service) can be guaranteed. ATM 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. See the chapter on profiles for

information on how to configure ATM profiles.

Click Port > PVC in the navigation panel to open the following screen. Use this screen to

view and configure permanent virtual circuit settings for individual ports.

MSC1000G/1024G/1224G Series User's Guide

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