ZyXEL Communications ALC-1024L, Руководство пользователя

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Web Configurator with MSC
ADSL Port Setup 5-9
Table 5-5 ALC Edit Port Setup
LABEL DESCRIPTION
VLAN Acceptable
Frame Type
This port accepts both tagged and untagged incoming packets.
Click Apply to save your changes back to the line card. Click Reset to begin configuring this screen afresh.
5.9 Channels
Defining channels (also called Permanent Virtual Circuits or PVCs) allows you to set priorities for different
services or subscribers. You can define up to eight channels on each 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 a port.
Use the ALC Edit Static VLAN screen to configure a static VLAN on the ALC for voice on the port.
Use the ALC Edit Port Channel Setup screen to:
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 IEEE 802.1p priority.
5.9.1 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.
5.9.2 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, VCI 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.
5.10 ALC Port Channel Setup Screen
Do the following to open a port’s Channel Setup screen:
Step 1.
Click Port Setup in the navigation panel and then the ADSL line card’s link to open the ALC Port
Setup screen.